/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 01:03:15,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 01:03:15,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 01:03:15,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 01:03:15,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 01:03:15,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 01:03:15,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 01:03:15,460 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-10 01:03:15,484 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 01:03:15,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 01:03:15,484 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 01:03:15,484 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 01:03:15,485 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 01:03:15,485 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 01:03:15,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 01:03:15,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 01:03:15,486 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 01:03:15,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 01:03:15,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 01:03:15,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 01:03:15,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 01:03:15,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 01:03:15,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 01:03:15,487 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 01:03:15,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 01:03:15,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 01:03:15,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 01:03:15,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 01:03:15,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 01:03:15,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 01:03:15,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 01:03:15,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 01:03:15,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 01:03:15,489 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 01:03:15,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 01:03:15,489 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 01:03:15,489 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 01:03:15,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 01:03:15,489 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 01:03:15,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 01:03:15,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 01:03:15,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 01:03:15,713 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 01:03:15,714 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 01:03:15,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c [2022-01-10 01:03:15,753 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e93fe2ed/b3d4592505d24020b65984b6b4966722/FLAGddd341a93 [2022-01-10 01:03:16,058 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 01:03:16,058 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c [2022-01-10 01:03:16,065 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e93fe2ed/b3d4592505d24020b65984b6b4966722/FLAGddd341a93 [2022-01-10 01:03:16,487 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e93fe2ed/b3d4592505d24020b65984b6b4966722 [2022-01-10 01:03:16,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 01:03:16,497 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 01:03:16,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 01:03:16,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 01:03:16,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 01:03:16,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:03:16" (1/1) ... [2022-01-10 01:03:16,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d548e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:16, skipping insertion in model container [2022-01-10 01:03:16,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:03:16" (1/1) ... [2022-01-10 01:03:16,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 01:03:16,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 01:03:16,679 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c[454,467] [2022-01-10 01:03:16,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 01:03:16,693 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 01:03:16,723 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c[454,467] [2022-01-10 01:03:16,723 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 01:03:16,736 INFO L208 MainTranslator]: Completed translation [2022-01-10 01:03:16,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:16 WrapperNode [2022-01-10 01:03:16,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 01:03:16,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 01:03:16,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 01:03:16,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 01:03:16,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:16" (1/1) ... [2022-01-10 01:03:16,764 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:16" (1/1) ... [2022-01-10 01:03:16,791 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2022-01-10 01:03:16,791 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 01:03:16,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 01:03:16,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 01:03:16,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 01:03:16,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:16" (1/1) ... [2022-01-10 01:03:16,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:16" (1/1) ... [2022-01-10 01:03:16,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:16" (1/1) ... [2022-01-10 01:03:16,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:16" (1/1) ... [2022-01-10 01:03:16,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:16" (1/1) ... [2022-01-10 01:03:16,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:16" (1/1) ... [2022-01-10 01:03:16,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:16" (1/1) ... [2022-01-10 01:03:16,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 01:03:16,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 01:03:16,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 01:03:16,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 01:03:16,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:16" (1/1) ... [2022-01-10 01:03:16,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 01:03:16,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:16,841 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 01:03:16,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 01:03:16,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 01:03:16,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 01:03:16,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 01:03:16,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-10 01:03:16,874 INFO L130 BoogieDeclarations]: Found specification of procedure id [2022-01-10 01:03:16,875 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2022-01-10 01:03:16,912 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 01:03:16,913 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 01:03:16,995 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 01:03:16,998 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 01:03:16,999 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 01:03:17,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:03:17 BoogieIcfgContainer [2022-01-10 01:03:17,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 01:03:17,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 01:03:17,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 01:03:17,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 01:03:17,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 01:03:16" (1/3) ... [2022-01-10 01:03:17,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3232cae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:03:17, skipping insertion in model container [2022-01-10 01:03:17,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:16" (2/3) ... [2022-01-10 01:03:17,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3232cae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:03:17, skipping insertion in model container [2022-01-10 01:03:17,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:03:17" (3/3) ... [2022-01-10 01:03:17,008 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i25_o25-2.c [2022-01-10 01:03:17,011 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 01:03:17,012 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 01:03:17,049 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 01:03:17,055 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 01:03:17,055 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 01:03:17,069 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 01:03:17,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 01:03:17,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:17,079 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:17,080 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:17,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:17,084 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2022-01-10 01:03:17,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:17,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725294270] [2022-01-10 01:03:17,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:17,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:17,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:03:17,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:17,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725294270] [2022-01-10 01:03:17,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725294270] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:03:17,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:03:17,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:03:17,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387921840] [2022-01-10 01:03:17,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:03:17,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:03:17,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:17,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:03:17,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:03:17,305 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 01:03:17,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:17,355 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-01-10 01:03:17,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 01:03:17,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-10 01:03:17,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:17,361 INFO L225 Difference]: With dead ends: 28 [2022-01-10 01:03:17,361 INFO L226 Difference]: Without dead ends: 15 [2022-01-10 01:03:17,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:03:17,368 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:17,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 55 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:03:17,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-10 01:03:17,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-10 01:03:17,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 01:03:17,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-01-10 01:03:17,390 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-01-10 01:03:17,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:17,390 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-01-10 01:03:17,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 01:03:17,391 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-01-10 01:03:17,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 01:03:17,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:17,391 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:17,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 01:03:17,392 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:17,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:17,392 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2022-01-10 01:03:17,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:17,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86591639] [2022-01-10 01:03:17,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:17,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:17,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:17,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 01:03:17,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:17,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86591639] [2022-01-10 01:03:17,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86591639] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:17,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360872913] [2022-01-10 01:03:17,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:17,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:17,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:17,458 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 01:03:17,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 01:03:17,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:17,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 01:03:17,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 01:03:17,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:17,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 01:03:17,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360872913] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:17,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:17,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2022-01-10 01:03:17,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734825549] [2022-01-10 01:03:17,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:17,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 01:03:17,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:17,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 01:03:17,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-01-10 01:03:17,726 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 01:03:17,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:17,760 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-01-10 01:03:17,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 01:03:17,762 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 16 [2022-01-10 01:03:17,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:17,763 INFO L225 Difference]: With dead ends: 22 [2022-01-10 01:03:17,763 INFO L226 Difference]: Without dead ends: 18 [2022-01-10 01:03:17,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-01-10 01:03:17,764 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:17,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 29 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:03:17,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-10 01:03:17,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-10 01:03:17,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 01:03:17,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-01-10 01:03:17,768 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-01-10 01:03:17,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:17,769 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-01-10 01:03:17,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 01:03:17,769 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-01-10 01:03:17,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 01:03:17,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:17,770 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:17,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 01:03:17,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:17,974 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:17,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:17,974 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2022-01-10 01:03:17,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:17,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510347211] [2022-01-10 01:03:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:17,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:18,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:18,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:18,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 01:03:18,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:18,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510347211] [2022-01-10 01:03:18,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510347211] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:18,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873623690] [2022-01-10 01:03:18,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 01:03:18,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:18,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:18,119 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 01:03:18,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 01:03:18,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:03:18,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 01:03:18,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:18,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 01:03:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 01:03:18,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 01:03:18,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873623690] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:18,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:18,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 13 [2022-01-10 01:03:18,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217032463] [2022-01-10 01:03:18,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:18,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 01:03:18,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:18,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 01:03:18,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-10 01:03:18,458 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-10 01:03:18,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:18,496 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-01-10 01:03:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 01:03:18,497 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2022-01-10 01:03:18,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:18,497 INFO L225 Difference]: With dead ends: 25 [2022-01-10 01:03:18,497 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 01:03:18,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-01-10 01:03:18,498 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 35 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:18,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 48 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:03:18,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 01:03:18,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-10 01:03:18,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 01:03:18,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-01-10 01:03:18,502 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2022-01-10 01:03:18,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:18,503 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-01-10 01:03:18,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-10 01:03:18,503 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-01-10 01:03:18,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 01:03:18,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:18,504 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:18,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 01:03:18,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-10 01:03:18,717 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:18,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:18,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2022-01-10 01:03:18,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:18,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855357285] [2022-01-10 01:03:18,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:18,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:18,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:18,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:18,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:18,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 01:03:18,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:18,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855357285] [2022-01-10 01:03:18,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855357285] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:18,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568474701] [2022-01-10 01:03:18,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 01:03:18,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:18,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:18,815 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 01:03:18,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 01:03:18,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 01:03:18,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:03:18,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 01:03:18,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 01:03:18,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 01:03:19,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568474701] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:19,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:19,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 26 [2022-01-10 01:03:19,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113627995] [2022-01-10 01:03:19,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:19,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 01:03:19,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:19,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 01:03:19,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-01-10 01:03:19,375 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 26 states, 25 states have (on average 1.52) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-10 01:03:19,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:19,582 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2022-01-10 01:03:19,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-10 01:03:19,582 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.52) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12) Word has length 28 [2022-01-10 01:03:19,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:19,583 INFO L225 Difference]: With dead ends: 39 [2022-01-10 01:03:19,584 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 01:03:19,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2022-01-10 01:03:19,585 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:19,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 80 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:03:19,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 01:03:19,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-10 01:03:19,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 01:03:19,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-01-10 01:03:19,590 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2022-01-10 01:03:19,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:19,590 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-01-10 01:03:19,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.52) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-10 01:03:19,590 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-01-10 01:03:19,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-10 01:03:19,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:19,591 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:19,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 01:03:19,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:19,808 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:19,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:19,808 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 4 times [2022-01-10 01:03:19,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:19,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234889328] [2022-01-10 01:03:19,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:19,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:19,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:19,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:19,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:19,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:19,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:19,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:19,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:19,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-01-10 01:03:19,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:19,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234889328] [2022-01-10 01:03:19,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234889328] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:19,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956906294] [2022-01-10 01:03:19,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 01:03:19,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:19,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:20,000 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 01:03:20,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 01:03:20,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 01:03:20,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:03:20,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 01:03:20,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-01-10 01:03:20,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 01:03:21,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956906294] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:21,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:21,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 23 [2022-01-10 01:03:21,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277453532] [2022-01-10 01:03:21,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:21,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 01:03:21,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:21,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 01:03:21,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2022-01-10 01:03:21,680 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2022-01-10 01:03:21,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:21,766 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-01-10 01:03:21,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 01:03:21,767 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 52 [2022-01-10 01:03:21,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:21,767 INFO L225 Difference]: With dead ends: 40 [2022-01-10 01:03:21,767 INFO L226 Difference]: Without dead ends: 36 [2022-01-10 01:03:21,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2022-01-10 01:03:21,769 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 92 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:21,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 91 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:03:21,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-10 01:03:21,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-10 01:03:21,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 01:03:21,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-01-10 01:03:21,773 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2022-01-10 01:03:21,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:21,773 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-01-10 01:03:21,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2022-01-10 01:03:21,774 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-01-10 01:03:21,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-10 01:03:21,775 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:21,775 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:21,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 01:03:21,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:21,987 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:21,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:21,987 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 5 times [2022-01-10 01:03:21,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:21,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108588994] [2022-01-10 01:03:21,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:21,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:22,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:22,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:22,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:22,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:22,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:22,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:22,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:22,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:22,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:22,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:22,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-10 01:03:22,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:22,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108588994] [2022-01-10 01:03:22,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108588994] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:22,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443322472] [2022-01-10 01:03:22,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 01:03:22,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:22,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:22,182 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 01:03:22,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 01:03:22,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-10 01:03:22,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:03:22,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 01:03:22,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-10 01:03:22,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-10 01:03:24,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443322472] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:24,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:24,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 21] total 51 [2022-01-10 01:03:24,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93187657] [2022-01-10 01:03:24,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:24,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-10 01:03:24,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:24,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-10 01:03:24,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=2140, Unknown=0, NotChecked=0, Total=2550 [2022-01-10 01:03:24,382 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 51 states, 50 states have (on average 1.36) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (4), 1 states have call predecessors, (4), 27 states have return successors, (27), 27 states have call predecessors, (27), 3 states have call successors, (27) [2022-01-10 01:03:24,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:24,991 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2022-01-10 01:03:24,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-10 01:03:24,992 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.36) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (4), 1 states have call predecessors, (4), 27 states have return successors, (27), 27 states have call predecessors, (27), 3 states have call successors, (27) Word has length 58 [2022-01-10 01:03:24,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:24,993 INFO L225 Difference]: With dead ends: 69 [2022-01-10 01:03:24,993 INFO L226 Difference]: Without dead ends: 63 [2022-01-10 01:03:24,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1152, Invalid=6158, Unknown=0, NotChecked=0, Total=7310 [2022-01-10 01:03:24,996 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 23 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:24,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 161 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:03:24,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-10 01:03:25,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-01-10 01:03:25,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2022-01-10 01:03:25,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-01-10 01:03:25,002 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58 [2022-01-10 01:03:25,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:25,002 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-01-10 01:03:25,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.36) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (4), 1 states have call predecessors, (4), 27 states have return successors, (27), 27 states have call predecessors, (27), 3 states have call successors, (27) [2022-01-10 01:03:25,003 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-01-10 01:03:25,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-10 01:03:25,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:25,004 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:25,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 01:03:25,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:25,211 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:25,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:25,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 6 times [2022-01-10 01:03:25,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:25,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653462646] [2022-01-10 01:03:25,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:25,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:25,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:25,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:25,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:25,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:25,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:25,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:25,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:25,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:25,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:25,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:25,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:25,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:25,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:25,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:25,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:25,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:25,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:25,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-01-10 01:03:25,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:25,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653462646] [2022-01-10 01:03:25,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653462646] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:25,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555350794] [2022-01-10 01:03:25,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 01:03:25,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:25,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:25,976 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 01:03:25,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 01:03:26,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-01-10 01:03:26,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:03:26,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-10 01:03:26,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-01-10 01:03:26,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-01-10 01:03:39,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555350794] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:39,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:39,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39, 39] total 75 [2022-01-10 01:03:39,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036198938] [2022-01-10 01:03:39,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:39,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-10 01:03:39,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:39,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-10 01:03:39,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=878, Invalid=4672, Unknown=0, NotChecked=0, Total=5550 [2022-01-10 01:03:39,119 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 75 states, 74 states have (on average 1.364864864864865) internal successors, (101), 49 states have internal predecessors, (101), 3 states have call successors, (4), 1 states have call predecessors, (4), 43 states have return successors, (44), 44 states have call predecessors, (44), 3 states have call successors, (44) [2022-01-10 01:03:39,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:39,915 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2022-01-10 01:03:39,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-10 01:03:39,916 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.364864864864865) internal successors, (101), 49 states have internal predecessors, (101), 3 states have call successors, (4), 1 states have call predecessors, (4), 43 states have return successors, (44), 44 states have call predecessors, (44), 3 states have call successors, (44) Word has length 112 [2022-01-10 01:03:39,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:39,931 INFO L225 Difference]: With dead ends: 93 [2022-01-10 01:03:39,931 INFO L226 Difference]: Without dead ends: 87 [2022-01-10 01:03:39,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3864 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2558, Invalid=13192, Unknown=0, NotChecked=0, Total=15750 [2022-01-10 01:03:39,936 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:39,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 131 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:03:39,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-10 01:03:39,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-01-10 01:03:39,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 59 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (27), 26 states have call predecessors, (27), 2 states have call successors, (27) [2022-01-10 01:03:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-01-10 01:03:39,969 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 112 [2022-01-10 01:03:39,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:39,969 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-01-10 01:03:39,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 1.364864864864865) internal successors, (101), 49 states have internal predecessors, (101), 3 states have call successors, (4), 1 states have call predecessors, (4), 43 states have return successors, (44), 44 states have call predecessors, (44), 3 states have call successors, (44) [2022-01-10 01:03:39,969 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-01-10 01:03:39,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-10 01:03:39,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:39,971 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:39,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-10 01:03:40,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:40,175 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:40,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:40,175 INFO L85 PathProgramCache]: Analyzing trace with hash -678635050, now seen corresponding path program 7 times [2022-01-10 01:03:40,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:40,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065999419] [2022-01-10 01:03:40,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:40,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-10 01:03:40,233 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-10 01:03:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-10 01:03:40,272 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-10 01:03:40,273 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-10 01:03:40,273 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-10 01:03:40,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 01:03:40,276 INFO L732 BasicCegarLoop]: Path program histogram: [7, 1] [2022-01-10 01:03:40,278 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-10 01:03:40,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 01:03:40 BoogieIcfgContainer [2022-01-10 01:03:40,314 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-10 01:03:40,314 INFO L158 Benchmark]: Toolchain (without parser) took 23817.53ms. Allocated memory was 210.8MB in the beginning and 367.0MB in the end (delta: 156.2MB). Free memory was 158.8MB in the beginning and 301.6MB in the end (delta: -142.7MB). Peak memory consumption was 14.9MB. Max. memory is 8.0GB. [2022-01-10 01:03:40,314 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 210.8MB. Free memory is still 174.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-10 01:03:40,315 INFO L158 Benchmark]: CACSL2BoogieTranslator took 253.65ms. Allocated memory is still 210.8MB. Free memory was 158.7MB in the beginning and 185.8MB in the end (delta: -27.1MB). Peak memory consumption was 10.9MB. Max. memory is 8.0GB. [2022-01-10 01:03:40,315 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.56ms. Allocated memory is still 210.8MB. Free memory was 185.8MB in the beginning and 184.5MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-10 01:03:40,315 INFO L158 Benchmark]: Boogie Preprocessor took 12.93ms. Allocated memory is still 210.8MB. Free memory was 184.5MB in the beginning and 183.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-10 01:03:40,316 INFO L158 Benchmark]: RCFGBuilder took 194.40ms. Allocated memory is still 210.8MB. Free memory was 183.4MB in the beginning and 174.5MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-01-10 01:03:40,316 INFO L158 Benchmark]: TraceAbstraction took 23312.74ms. Allocated memory was 210.8MB in the beginning and 367.0MB in the end (delta: 156.2MB). Free memory was 174.0MB in the beginning and 301.6MB in the end (delta: -127.6MB). Peak memory consumption was 30.2MB. Max. memory is 8.0GB. [2022-01-10 01:03:40,317 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 210.8MB. Free memory is still 174.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 253.65ms. Allocated memory is still 210.8MB. Free memory was 158.7MB in the beginning and 185.8MB in the end (delta: -27.1MB). Peak memory consumption was 10.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 37.56ms. Allocated memory is still 210.8MB. Free memory was 185.8MB in the beginning and 184.5MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 12.93ms. Allocated memory is still 210.8MB. Free memory was 184.5MB in the beginning and 183.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 194.40ms. Allocated memory is still 210.8MB. Free memory was 183.4MB in the beginning and 174.5MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 23312.74ms. Allocated memory was 210.8MB in the beginning and 367.0MB in the end (delta: 156.2MB). Free memory was 174.0MB in the beginning and 301.6MB in the end (delta: -127.6MB). Peak memory consumption was 30.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int input = 25; VAL [input=25] [L13] CALL, EXPR id(input) VAL [\old(x)=25] [L7] COND FALSE !(x==0) VAL [\old(x)=25, x=25] [L8] CALL, EXPR id(x-1) VAL [\old(x)=24] [L7] COND FALSE !(x==0) VAL [\old(x)=24, x=24] [L8] CALL, EXPR id(x-1) VAL [\old(x)=23] [L7] COND FALSE !(x==0) VAL [\old(x)=23, x=23] [L8] CALL, EXPR id(x-1) VAL [\old(x)=22] [L7] COND FALSE !(x==0) VAL [\old(x)=22, x=22] [L8] CALL, EXPR id(x-1) VAL [\old(x)=21] [L7] COND FALSE !(x==0) VAL [\old(x)=21, x=21] [L8] CALL, EXPR id(x-1) VAL [\old(x)=20] [L7] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L8] CALL, EXPR id(x-1) VAL [\old(x)=19] [L7] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L8] CALL, EXPR id(x-1) VAL [\old(x)=18] [L7] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L8] CALL, EXPR id(x-1) VAL [\old(x)=17] [L7] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L8] CALL, EXPR id(x-1) VAL [\old(x)=16] [L7] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L8] CALL, EXPR id(x-1) VAL [\old(x)=15] [L7] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L8] CALL, EXPR id(x-1) VAL [\old(x)=14] [L7] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L8] CALL, EXPR id(x-1) VAL [\old(x)=13] [L7] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L8] CALL, EXPR id(x-1) VAL [\old(x)=12] [L7] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L8] CALL, EXPR id(x-1) VAL [\old(x)=11] [L7] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L8] CALL, EXPR id(x-1) VAL [\old(x)=10] [L7] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L8] CALL, EXPR id(x-1) VAL [\old(x)=9] [L7] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L8] CALL, EXPR id(x-1) VAL [\old(x)=8] [L7] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L8] CALL, EXPR id(x-1) VAL [\old(x)=7] [L7] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L8] CALL, EXPR id(x-1) VAL [\old(x)=6] [L7] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L8] CALL, EXPR id(x-1) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=21, id(x-1)=20, x=21] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=22, id(x-1)=21, x=22] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=23, id(x-1)=22, x=23] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=24, id(x-1)=23, x=24] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=25, id(x-1)=24, x=25] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) VAL [id(input)=25, input=25] [L13] int result = id(input); [L14] COND TRUE result == 25 VAL [input=25, result=25] [L15] reach_error() VAL [input=25, result=25] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 23.2s, OverallIterations: 8, TraceHistogramMax: 26, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 308 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 216 mSDsluCounter, 595 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 526 mSDsCounter, 134 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 595 IncrementalHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 134 mSolverCounterUnsat, 69 mSDtfsCounter, 595 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 835 GetRequests, 530 SyntacticMatches, 1 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6263 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=7, InterpolantAutomatonStates: 143, 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, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 19.2s InterpolantComputationTime, 746 NumberOfCodeBlocks, 746 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 855 ConstructedInterpolants, 0 QuantifiedInterpolants, 2021 SizeOfPredicates, 13 NumberOfNonLiveVariables, 814 ConjunctsInSsa, 100 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 1875/3858 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 incorrect! [2022-01-10 01:03:40,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...