/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/Fibonacci04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 01:00:55,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 01:00:55,474 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 01:00:55,526 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 01:00:55,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 01:00:55,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 01:00:55,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 01:00:55,564 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 01:00:55,594 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 01:00:55,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 01:00:55,594 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 01:00:55,594 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 01:00:55,595 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 01:00:55,595 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 01:00:55,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 01:00:55,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 01:00:55,595 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 01:00:55,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 01:00:55,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 01:00:55,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 01:00:55,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 01:00:55,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 01:00:55,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 01:00:55,596 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 01:00:55,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 01:00:55,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 01:00:55,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 01:00:55,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 01:00:55,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 01:00:55,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 01:00:55,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 01:00:55,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 01:00:55,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 01:00:55,597 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 01:00:55,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 01:00:55,597 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 01:00:55,597 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 01:00:55,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 01:00:55,598 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 01:00:55,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 01:00:55,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 01:00:55,821 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 01:00:55,822 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 01:00:55,822 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 01:00:55,823 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci04.c [2022-01-10 01:00:55,867 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/339df6799/76551faf0e9145748cebf708b06ac73d/FLAG5a87293dd [2022-01-10 01:00:56,195 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 01:00:56,195 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci04.c [2022-01-10 01:00:56,202 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/339df6799/76551faf0e9145748cebf708b06ac73d/FLAG5a87293dd [2022-01-10 01:00:56,635 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/339df6799/76551faf0e9145748cebf708b06ac73d [2022-01-10 01:00:56,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 01:00:56,648 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 01:00:56,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 01:00:56,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 01:00:56,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 01:00:56,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:00:56" (1/1) ... [2022-01-10 01:00:56,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e8b30f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:56, skipping insertion in model container [2022-01-10 01:00:56,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:00:56" (1/1) ... [2022-01-10 01:00:56,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 01:00:56,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 01:00:56,952 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/Fibonacci04.c[780,793] [2022-01-10 01:00:56,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 01:00:56,963 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 01:00:56,991 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/Fibonacci04.c[780,793] [2022-01-10 01:00:56,992 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 01:00:57,001 INFO L208 MainTranslator]: Completed translation [2022-01-10 01:00:57,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:57 WrapperNode [2022-01-10 01:00:57,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 01:00:57,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 01:00:57,004 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 01:00:57,004 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 01:00:57,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:57" (1/1) ... [2022-01-10 01:00:57,035 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:57" (1/1) ... [2022-01-10 01:00:57,046 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 23 [2022-01-10 01:00:57,046 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 01:00:57,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 01:00:57,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 01:00:57,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 01:00:57,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:57" (1/1) ... [2022-01-10 01:00:57,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:57" (1/1) ... [2022-01-10 01:00:57,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:57" (1/1) ... [2022-01-10 01:00:57,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:57" (1/1) ... [2022-01-10 01:00:57,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:57" (1/1) ... [2022-01-10 01:00:57,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:57" (1/1) ... [2022-01-10 01:00:57,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:57" (1/1) ... [2022-01-10 01:00:57,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 01:00:57,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 01:00:57,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 01:00:57,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 01:00:57,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:57" (1/1) ... [2022-01-10 01:00:57,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 01:00:57,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:00:57,137 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 01:00:57,183 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 01:00:57,209 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2022-01-10 01:00:57,210 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2022-01-10 01:00:57,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 01:00:57,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 01:00:57,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 01:00:57,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-10 01:00:57,266 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 01:00:57,268 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 01:00:57,425 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 01:00:57,429 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 01:00:57,429 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 01:00:57,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:00:57 BoogieIcfgContainer [2022-01-10 01:00:57,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 01:00:57,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 01:00:57,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 01:00:57,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 01:00:57,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 01:00:56" (1/3) ... [2022-01-10 01:00:57,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a55af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:00:57, skipping insertion in model container [2022-01-10 01:00:57,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:57" (2/3) ... [2022-01-10 01:00:57,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a55af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:00:57, skipping insertion in model container [2022-01-10 01:00:57,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:00:57" (3/3) ... [2022-01-10 01:00:57,446 INFO L111 eAbstractionObserver]: Analyzing ICFG Fibonacci04.c [2022-01-10 01:00:57,464 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 01:00:57,465 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 01:00:57,521 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 01:00:57,542 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 01:00:57,542 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 01:00:57,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 01:00:57,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 01:00:57,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:00:57,560 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:00:57,575 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:00:57,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:00:57,579 INFO L85 PathProgramCache]: Analyzing trace with hash 117289724, now seen corresponding path program 1 times [2022-01-10 01:00:57,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:00:57,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598813338] [2022-01-10 01:00:57,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:00:57,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:00:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:57,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:00:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:57,926 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 01:00:57,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:00:57,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598813338] [2022-01-10 01:00:57,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598813338] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:00:57,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:00:57,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:00:57,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101638356] [2022-01-10 01:00:57,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:00:57,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:00:57,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:00:57,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:00:57,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:00:57,989 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 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 01:00:58,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:00:58,101 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-01-10 01:00:58,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 01:00:58,103 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 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 01:00:58,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:00:58,122 INFO L225 Difference]: With dead ends: 31 [2022-01-10 01:00:58,122 INFO L226 Difference]: Without dead ends: 18 [2022-01-10 01:00:58,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:00:58,132 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:00:58,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 41 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:00:58,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-10 01:00:58,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-10 01:00:58,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 01:00:58,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-01-10 01:00:58,193 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2022-01-10 01:00:58,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:00:58,193 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-01-10 01:00:58,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 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 01:00:58,193 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-01-10 01:00:58,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 01:00:58,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:00:58,195 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:00:58,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 01:00:58,195 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:00:58,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:00:58,197 INFO L85 PathProgramCache]: Analyzing trace with hash 36927066, now seen corresponding path program 1 times [2022-01-10 01:00:58,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:00:58,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443652108] [2022-01-10 01:00:58,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:00:58,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:00:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:58,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:00:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:58,332 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 01:00:58,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:00:58,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443652108] [2022-01-10 01:00:58,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443652108] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:00:58,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:00:58,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:00:58,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101975878] [2022-01-10 01:00:58,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:00:58,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:00:58,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:00:58,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:00:58,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:00:58,338 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 01:00:58,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:00:58,413 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2022-01-10 01:00:58,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 01:00:58,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 11 [2022-01-10 01:00:58,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:00:58,414 INFO L225 Difference]: With dead ends: 24 [2022-01-10 01:00:58,414 INFO L226 Difference]: Without dead ends: 20 [2022-01-10 01:00:58,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:00:58,416 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:00:58,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 33 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:00:58,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-10 01:00:58,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-01-10 01:00:58,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 01:00:58,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-01-10 01:00:58,420 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2022-01-10 01:00:58,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:00:58,420 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-01-10 01:00:58,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 01:00:58,420 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-01-10 01:00:58,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 01:00:58,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:00:58,421 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:00:58,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 01:00:58,422 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:00:58,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:00:58,422 INFO L85 PathProgramCache]: Analyzing trace with hash 703243533, now seen corresponding path program 1 times [2022-01-10 01:00:58,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:00:58,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026655435] [2022-01-10 01:00:58,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:00:58,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:00:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:58,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:00:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:58,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:58,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 01:00:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 01:00:58,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:00:58,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026655435] [2022-01-10 01:00:58,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026655435] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:00:58,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949284228] [2022-01-10 01:00:58,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:00:58,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:00:58,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:00:58,602 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 01:00:58,603 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 01:00:58,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:58,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 01:00:58,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:00:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 01:00:58,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:00:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 01:00:58,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949284228] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:00:58,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:00:58,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 13 [2022-01-10 01:00:58,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968539273] [2022-01-10 01:00:58,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:00:58,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 01:00:58,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:00:58,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 01:00:58,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-01-10 01:00:58,998 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-10 01:00:59,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:00:59,154 INFO L93 Difference]: Finished difference Result 46 states and 69 transitions. [2022-01-10 01:00:59,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 01:00:59,155 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 23 [2022-01-10 01:00:59,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:00:59,156 INFO L225 Difference]: With dead ends: 46 [2022-01-10 01:00:59,156 INFO L226 Difference]: Without dead ends: 29 [2022-01-10 01:00:59,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2022-01-10 01:00:59,158 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:00:59,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 65 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:00:59,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-10 01:00:59,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-10 01:00:59,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-01-10 01:00:59,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 41 transitions. [2022-01-10 01:00:59,165 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 41 transitions. Word has length 23 [2022-01-10 01:00:59,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:00:59,166 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 41 transitions. [2022-01-10 01:00:59,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-10 01:00:59,166 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 41 transitions. [2022-01-10 01:00:59,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 01:00:59,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:00:59,168 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:00:59,190 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 01:00:59,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:00:59,384 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:00:59,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:00:59,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1937134450, now seen corresponding path program 1 times [2022-01-10 01:00:59,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:00:59,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586923712] [2022-01-10 01:00:59,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:00:59,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:00:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:59,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:00:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:59,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:59,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:59,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 01:00:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:59,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-10 01:00:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:59,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:59,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 01:00:59,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:59,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:59,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 01:00:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 44 proven. 63 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-01-10 01:00:59,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:00:59,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586923712] [2022-01-10 01:00:59,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586923712] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:00:59,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176945850] [2022-01-10 01:00:59,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:00:59,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:00:59,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:00:59,676 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 01:00:59,696 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 01:00:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:59,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 01:00:59,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:00:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 16 proven. 75 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-01-10 01:00:59,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:01:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 16 proven. 82 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-01-10 01:01:00,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176945850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:01:00,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:01:00,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 18 [2022-01-10 01:01:00,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038178430] [2022-01-10 01:01:00,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:01:00,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 01:01:00,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:01:00,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 01:01:00,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-01-10 01:01:00,336 INFO L87 Difference]: Start difference. First operand 29 states and 41 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 11 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18) [2022-01-10 01:01:00,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:01:00,506 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2022-01-10 01:01:00,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 01:01:00,507 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 11 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18) Word has length 65 [2022-01-10 01:01:00,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:01:00,526 INFO L225 Difference]: With dead ends: 73 [2022-01-10 01:01:00,526 INFO L226 Difference]: Without dead ends: 44 [2022-01-10 01:01:00,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2022-01-10 01:01:00,529 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:01:00,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 94 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:01:00,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-10 01:01:00,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-01-10 01:01:00,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (19), 9 states have call predecessors, (19), 7 states have call successors, (19) [2022-01-10 01:01:00,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2022-01-10 01:01:00,547 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 65 [2022-01-10 01:01:00,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:01:00,549 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2022-01-10 01:01:00,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 11 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18) [2022-01-10 01:01:00,554 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2022-01-10 01:01:00,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-10 01:01:00,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:01:00,558 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 10, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:01:00,576 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 01:01:00,758 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,SelfDestructingSolverStorable3 [2022-01-10 01:01:00,759 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:01:00,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:01:00,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1961744707, now seen corresponding path program 2 times [2022-01-10 01:01:00,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:01:00,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993662977] [2022-01-10 01:01:00,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:01:00,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:01:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:00,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:01:00,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:00,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:01:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:01,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:01:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:01,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:01:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:01,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:01:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:01,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 01:01:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:01,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-10 01:01:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:01,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 01:01:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:01,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:01:01,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:01,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 01:01:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:01,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-10 01:01:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:01,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:01:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:01,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:01:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:01,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 01:01:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:01,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-10 01:01:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:01,157 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 85 proven. 119 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-01-10 01:01:01,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:01:01,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993662977] [2022-01-10 01:01:01,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993662977] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:01:01,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154180192] [2022-01-10 01:01:01,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 01:01:01,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:01:01,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:01:01,167 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 01:01:01,168 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 01:01:01,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 01:01:01,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:01:01,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 01:01:01,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:01:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 64 proven. 158 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-01-10 01:01:01,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:01:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 64 proven. 170 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-01-10 01:01:01,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154180192] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:01:01,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:01:01,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 17 [2022-01-10 01:01:01,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622030911] [2022-01-10 01:01:01,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:01:01,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 01:01:01,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:01:01,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 01:01:01,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-01-10 01:01:01,973 INFO L87 Difference]: Start difference. First operand 44 states and 61 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 10 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2022-01-10 01:01:02,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:01:02,146 INFO L93 Difference]: Finished difference Result 101 states and 150 transitions. [2022-01-10 01:01:02,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 01:01:02,147 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 10 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) Word has length 104 [2022-01-10 01:01:02,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:01:02,148 INFO L225 Difference]: With dead ends: 101 [2022-01-10 01:01:02,148 INFO L226 Difference]: Without dead ends: 60 [2022-01-10 01:01:02,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 227 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=182, Invalid=418, Unknown=0, NotChecked=0, Total=600 [2022-01-10 01:01:02,149 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 66 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:01:02,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 92 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:01:02,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-10 01:01:02,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2022-01-10 01:01:02,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-01-10 01:01:02,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 58 transitions. [2022-01-10 01:01:02,157 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 58 transitions. Word has length 104 [2022-01-10 01:01:02,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:01:02,158 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 58 transitions. [2022-01-10 01:01:02,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 10 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2022-01-10 01:01:02,158 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 58 transitions. [2022-01-10 01:01:02,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-10 01:01:02,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:01:02,172 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:01:02,193 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 01:01:02,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:01:02,403 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:01:02,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:01:02,404 INFO L85 PathProgramCache]: Analyzing trace with hash -2094125593, now seen corresponding path program 3 times [2022-01-10 01:01:02,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:01:02,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952635987] [2022-01-10 01:01:02,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:01:02,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:01:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-10 01:01:02,425 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-10 01:01:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-10 01:01:02,480 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-10 01:01:02,480 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-10 01:01:02,481 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-10 01:01:02,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 01:01:02,484 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2022-01-10 01:01:02,486 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-10 01:01:02,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 01:01:02 BoogieIcfgContainer [2022-01-10 01:01:02,548 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-10 01:01:02,549 INFO L158 Benchmark]: Toolchain (without parser) took 5901.52ms. Allocated memory was 197.1MB in the beginning and 237.0MB in the end (delta: 39.8MB). Free memory was 147.9MB in the beginning and 168.6MB in the end (delta: -20.7MB). Peak memory consumption was 19.4MB. Max. memory is 8.0GB. [2022-01-10 01:01:02,549 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 197.1MB. Free memory was 164.0MB in the beginning and 163.8MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-10 01:01:02,549 INFO L158 Benchmark]: CACSL2BoogieTranslator took 353.35ms. Allocated memory is still 197.1MB. Free memory was 147.7MB in the beginning and 173.9MB in the end (delta: -26.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-10 01:01:02,549 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.61ms. Allocated memory is still 197.1MB. Free memory was 173.9MB in the beginning and 172.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-10 01:01:02,550 INFO L158 Benchmark]: Boogie Preprocessor took 30.15ms. Allocated memory is still 197.1MB. Free memory was 172.3MB in the beginning and 171.7MB in the end (delta: 610.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-10 01:01:02,550 INFO L158 Benchmark]: RCFGBuilder took 352.63ms. Allocated memory is still 197.1MB. Free memory was 171.7MB in the beginning and 161.8MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-01-10 01:01:02,550 INFO L158 Benchmark]: TraceAbstraction took 5114.51ms. Allocated memory was 197.1MB in the beginning and 237.0MB in the end (delta: 39.8MB). Free memory was 161.8MB in the beginning and 168.6MB in the end (delta: -6.8MB). Peak memory consumption was 34.6MB. Max. memory is 8.0GB. [2022-01-10 01:01:02,551 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 197.1MB. Free memory was 164.0MB in the beginning and 163.8MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 353.35ms. Allocated memory is still 197.1MB. Free memory was 147.7MB in the beginning and 173.9MB in the end (delta: -26.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 42.61ms. Allocated memory is still 197.1MB. Free memory was 173.9MB in the beginning and 172.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.15ms. Allocated memory is still 197.1MB. Free memory was 172.3MB in the beginning and 171.7MB in the end (delta: 610.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 352.63ms. Allocated memory is still 197.1MB. Free memory was 171.7MB in the beginning and 161.8MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 5114.51ms. Allocated memory was 197.1MB in the beginning and 237.0MB in the end (delta: 39.8MB). Free memory was 161.8MB in the beginning and 168.6MB in the end (delta: -6.8MB). Peak memory consumption was 34.6MB. 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: 35]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L30] int x = __VERIFIER_nondet_int(); [L31] CALL, EXPR fibonacci(x) VAL [\old(n)=5] [L19] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L21] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=4] [L19] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L21] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=3] [L19] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L21] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L19] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L21] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L19] COND TRUE n < 1 [L20] return 0; VAL [\old(n)=0, \result=0, n=0] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=4, fibonacci(n-1)=2, n=4] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=2] [L19] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L21] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L19] COND TRUE n < 1 [L20] return 0; VAL [\old(n)=0, \result=0, n=0] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=4, fibonacci(n-1)=2, fibonacci(n-2)=1, n=4] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=5, fibonacci(n-1)=3, n=5] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=3] [L19] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L21] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L19] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L21] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L19] COND TRUE n < 1 [L20] return 0; VAL [\old(n)=0, \result=0, n=0] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=5, fibonacci(n-1)=3, fibonacci(n-2)=2, n=5] [L24] return fibonacci(n-1) + fibonacci(n-2); [L31] RET, EXPR fibonacci(x) VAL [fibonacci(x)=5, x=5] [L31] int result = fibonacci(x); [L32] COND FALSE !(x != 5 || result == 3) VAL [result=5, x=5] [L35] reach_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.0s, OverallIterations: 6, TraceHistogramMax: 15, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 180 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 169 mSDsluCounter, 325 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 248 mSDsCounter, 173 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 507 IncrementalHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 173 mSolverCounterUnsat, 77 mSDtfsCounter, 507 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 499 GetRequests, 421 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=4, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 18 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 511 NumberOfCodeBlocks, 511 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 586 ConstructedInterpolants, 0 QuantifiedInterpolants, 1103 SizeOfPredicates, 10 NumberOfNonLiveVariables, 501 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 1567/2250 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 01:01:02,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...