./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 18:41:40,884 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 18:41:40,939 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 18:41:40,945 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 18:41:40,946 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 18:41:40,968 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 18:41:40,968 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 18:41:40,969 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 18:41:40,969 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 18:41:40,971 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 18:41:40,971 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 18:41:40,971 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 18:41:40,972 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 18:41:40,973 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 18:41:40,973 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 18:41:40,973 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 18:41:40,974 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 18:41:40,974 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 18:41:40,974 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 18:41:40,974 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 18:41:40,974 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 18:41:40,976 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 18:41:40,976 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 18:41:40,977 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 18:41:40,977 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 18:41:40,977 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 18:41:40,977 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 18:41:40,977 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 18:41:40,977 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 18:41:40,978 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 18:41:40,978 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 18:41:40,978 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 18:41:40,978 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:41:40,978 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 18:41:40,978 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 18:41:40,978 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 18:41:40,979 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 18:41:40,979 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 18:41:40,979 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 18:41:40,979 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 18:41:40,979 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 18:41:40,981 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 18:41:40,981 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be [2024-10-12 18:41:41,205 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 18:41:41,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 18:41:41,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 18:41:41,229 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 18:41:41,229 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 18:41:41,230 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2024-10-12 18:41:42,481 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 18:41:42,598 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 18:41:42,598 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2024-10-12 18:41:42,603 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/562c1135f/4534c6e6e24944e89339793891fc549e/FLAGadd22402b [2024-10-12 18:41:42,613 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/562c1135f/4534c6e6e24944e89339793891fc549e [2024-10-12 18:41:42,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 18:41:42,615 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 18:41:42,617 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 18:41:42,617 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 18:41:42,621 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 18:41:42,621 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:41:42" (1/1) ... [2024-10-12 18:41:42,622 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c357b61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:42, skipping insertion in model container [2024-10-12 18:41:42,622 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:41:42" (1/1) ... [2024-10-12 18:41:42,636 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 18:41:42,740 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2024-10-12 18:41:42,752 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:41:42,758 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 18:41:42,766 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2024-10-12 18:41:42,771 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:41:42,781 INFO L204 MainTranslator]: Completed translation [2024-10-12 18:41:42,782 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:42 WrapperNode [2024-10-12 18:41:42,782 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 18:41:42,782 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 18:41:42,797 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 18:41:42,797 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 18:41:42,803 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:42" (1/1) ... [2024-10-12 18:41:42,808 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:42" (1/1) ... [2024-10-12 18:41:42,820 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 81 [2024-10-12 18:41:42,820 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 18:41:42,820 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 18:41:42,821 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 18:41:42,821 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 18:41:42,838 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:42" (1/1) ... [2024-10-12 18:41:42,838 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:42" (1/1) ... [2024-10-12 18:41:42,839 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:42" (1/1) ... [2024-10-12 18:41:42,847 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-12 18:41:42,847 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:42" (1/1) ... [2024-10-12 18:41:42,847 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:42" (1/1) ... [2024-10-12 18:41:42,849 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:42" (1/1) ... [2024-10-12 18:41:42,851 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:42" (1/1) ... [2024-10-12 18:41:42,852 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:42" (1/1) ... [2024-10-12 18:41:42,852 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:42" (1/1) ... [2024-10-12 18:41:42,853 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 18:41:42,854 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 18:41:42,854 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 18:41:42,854 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 18:41:42,854 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:42" (1/1) ... [2024-10-12 18:41:42,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:41:42,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:41:42,879 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-12 18:41:42,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-12 18:41:42,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 18:41:42,919 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-12 18:41:42,919 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-12 18:41:42,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 18:41:42,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 18:41:42,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 18:41:42,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-12 18:41:42,920 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-12 18:41:42,970 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 18:41:42,972 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 18:41:43,098 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-12 18:41:43,099 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 18:41:43,116 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 18:41:43,116 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-12 18:41:43,117 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:41:43 BoogieIcfgContainer [2024-10-12 18:41:43,117 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 18:41:43,119 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 18:41:43,119 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 18:41:43,121 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 18:41:43,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 06:41:42" (1/3) ... [2024-10-12 18:41:43,122 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ad55dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:41:43, skipping insertion in model container [2024-10-12 18:41:43,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:42" (2/3) ... [2024-10-12 18:41:43,123 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ad55dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:41:43, skipping insertion in model container [2024-10-12 18:41:43,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:41:43" (3/3) ... [2024-10-12 18:41:43,124 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2024-10-12 18:41:43,136 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 18:41:43,136 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 18:41:43,173 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 18:41:43,178 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3cb98c33, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 18:41:43,178 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 18:41:43,181 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-12 18:41:43,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-12 18:41:43,186 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:41:43,186 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:41:43,186 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:41:43,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:41:43,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1884886011, now seen corresponding path program 1 times [2024-10-12 18:41:43,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:41:43,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416264681] [2024-10-12 18:41:43,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:43,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:41:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:43,298 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:41:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:43,313 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 18:41:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:41:43,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:41:43,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416264681] [2024-10-12 18:41:43,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416264681] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:41:43,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:41:43,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 18:41:43,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711477953] [2024-10-12 18:41:43,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:41:43,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 18:41:43,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:41:43,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 18:41:43,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 18:41:43,362 INFO L87 Difference]: Start difference. First operand has 29 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-12 18:41:43,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:41:43,400 INFO L93 Difference]: Finished difference Result 56 states and 92 transitions. [2024-10-12 18:41:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 18:41:43,402 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-10-12 18:41:43,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:41:43,411 INFO L225 Difference]: With dead ends: 56 [2024-10-12 18:41:43,411 INFO L226 Difference]: Without dead ends: 27 [2024-10-12 18:41:43,413 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 18:41:43,419 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:41:43,424 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:41:43,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-12 18:41:43,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-10-12 18:41:43,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-12 18:41:43,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-10-12 18:41:43,451 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 17 [2024-10-12 18:41:43,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:41:43,451 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-10-12 18:41:43,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-12 18:41:43,451 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-10-12 18:41:43,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-12 18:41:43,452 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:41:43,452 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:41:43,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 18:41:43,453 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:41:43,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:41:43,454 INFO L85 PathProgramCache]: Analyzing trace with hash 906212714, now seen corresponding path program 1 times [2024-10-12 18:41:43,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:41:43,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392369961] [2024-10-12 18:41:43,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:43,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:41:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:43,662 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:41:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:43,673 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 18:41:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 18:41:43,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:41:43,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392369961] [2024-10-12 18:41:43,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392369961] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:41:43,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:41:43,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-12 18:41:43,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813542138] [2024-10-12 18:41:43,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:41:43,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-12 18:41:43,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:41:43,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-12 18:41:43,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-12 18:41:43,723 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-12 18:41:43,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:41:43,924 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2024-10-12 18:41:43,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 18:41:43,924 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-10-12 18:41:43,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:41:43,925 INFO L225 Difference]: With dead ends: 46 [2024-10-12 18:41:43,925 INFO L226 Difference]: Without dead ends: 39 [2024-10-12 18:41:43,926 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-12 18:41:43,927 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:41:43,928 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 106 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:41:43,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-12 18:41:43,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2024-10-12 18:41:43,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-12 18:41:43,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-10-12 18:41:43,938 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 18 [2024-10-12 18:41:43,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:41:43,938 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-10-12 18:41:43,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-12 18:41:43,939 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-10-12 18:41:43,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-12 18:41:43,939 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:41:43,939 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:41:43,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-12 18:41:43,940 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:41:43,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:41:43,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1843908713, now seen corresponding path program 1 times [2024-10-12 18:41:43,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:41:43,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257477345] [2024-10-12 18:41:43,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:43,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:41:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:41:43,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403460889] [2024-10-12 18:41:43,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:43,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:41:43,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:41:43,978 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) [2024-10-12 18:41:43,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 18:41:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:44,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-12 18:41:44,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:41:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:41:44,161 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 18:41:44,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:41:44,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257477345] [2024-10-12 18:41:44,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:41:44,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403460889] [2024-10-12 18:41:44,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403460889] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:41:44,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:41:44,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 18:41:44,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645042224] [2024-10-12 18:41:44,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:41:44,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 18:41:44,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:41:44,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 18:41:44,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 18:41:44,164 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-12 18:41:44,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:41:44,209 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2024-10-12 18:41:44,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 18:41:44,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-10-12 18:41:44,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:41:44,210 INFO L225 Difference]: With dead ends: 45 [2024-10-12 18:41:44,210 INFO L226 Difference]: Without dead ends: 43 [2024-10-12 18:41:44,211 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 18:41:44,211 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:41:44,212 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 107 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:41:44,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-12 18:41:44,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-10-12 18:41:44,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-12 18:41:44,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2024-10-12 18:41:44,219 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 21 [2024-10-12 18:41:44,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:41:44,219 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2024-10-12 18:41:44,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-12 18:41:44,219 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2024-10-12 18:41:44,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-12 18:41:44,220 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:41:44,220 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:41:44,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-12 18:41:44,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:41:44,425 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:41:44,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:41:44,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1716078747, now seen corresponding path program 1 times [2024-10-12 18:41:44,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:41:44,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122846604] [2024-10-12 18:41:44,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:44,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:41:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:44,543 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:41:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:44,579 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 18:41:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 18:41:44,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:41:44,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122846604] [2024-10-12 18:41:44,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122846604] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:41:44,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487488349] [2024-10-12 18:41:44,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:44,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:41:44,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:41:44,591 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) [2024-10-12 18:41:44,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 18:41:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:44,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-12 18:41:44,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:41:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 18:41:44,670 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:41:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 18:41:44,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487488349] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:41:44,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:41:44,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-10-12 18:41:44,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422636032] [2024-10-12 18:41:44,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:41:44,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-12 18:41:44,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:41:44,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-12 18:41:44,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-12 18:41:44,740 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-12 18:41:44,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:41:44,890 INFO L93 Difference]: Finished difference Result 95 states and 133 transitions. [2024-10-12 18:41:44,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-12 18:41:44,892 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2024-10-12 18:41:44,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:41:44,893 INFO L225 Difference]: With dead ends: 95 [2024-10-12 18:41:44,894 INFO L226 Difference]: Without dead ends: 88 [2024-10-12 18:41:44,895 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-10-12 18:41:44,895 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 57 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:41:44,896 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 240 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:41:44,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-10-12 18:41:44,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2024-10-12 18:41:44,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 45 states have internal predecessors, (56), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-12 18:41:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2024-10-12 18:41:44,915 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 23 [2024-10-12 18:41:44,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:41:44,916 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2024-10-12 18:41:44,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-12 18:41:44,916 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2024-10-12 18:41:44,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 18:41:44,916 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:41:44,916 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:41:44,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-12 18:41:45,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-12 18:41:45,117 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:41:45,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:41:45,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1218198070, now seen corresponding path program 1 times [2024-10-12 18:41:45,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:41:45,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630295077] [2024-10-12 18:41:45,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:45,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:41:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:41:45,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562143956] [2024-10-12 18:41:45,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:45,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:41:45,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:41:45,138 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) [2024-10-12 18:41:45,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 18:41:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:45,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-12 18:41:45,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:41:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:41:45,265 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 18:41:45,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:41:45,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630295077] [2024-10-12 18:41:45,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:41:45,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562143956] [2024-10-12 18:41:45,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562143956] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:41:45,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:41:45,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 18:41:45,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527581909] [2024-10-12 18:41:45,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:41:45,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 18:41:45,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:41:45,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 18:41:45,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 18:41:45,268 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 18:41:45,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:41:45,318 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2024-10-12 18:41:45,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 18:41:45,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-10-12 18:41:45,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:41:45,322 INFO L225 Difference]: With dead ends: 71 [2024-10-12 18:41:45,322 INFO L226 Difference]: Without dead ends: 69 [2024-10-12 18:41:45,322 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 18:41:45,323 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 7 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:41:45,323 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 105 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:41:45,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-12 18:41:45,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2024-10-12 18:41:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-12 18:41:45,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2024-10-12 18:41:45,341 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 26 [2024-10-12 18:41:45,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:41:45,341 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2024-10-12 18:41:45,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 18:41:45,341 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2024-10-12 18:41:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 18:41:45,342 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:41:45,342 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:41:45,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-12 18:41:45,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:41:45,543 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:41:45,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:41:45,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1368676420, now seen corresponding path program 1 times [2024-10-12 18:41:45,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:41:45,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520564344] [2024-10-12 18:41:45,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:45,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:41:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:41:45,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057965977] [2024-10-12 18:41:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:45,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:41:45,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:41:45,566 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) [2024-10-12 18:41:45,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 18:41:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:45,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-12 18:41:45,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:41:45,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:41:45,723 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:41:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:41:45,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:41:45,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520564344] [2024-10-12 18:41:45,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:41:45,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057965977] [2024-10-12 18:41:45,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057965977] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:41:45,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:41:45,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2024-10-12 18:41:45,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494129354] [2024-10-12 18:41:45,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:41:45,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-12 18:41:45,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:41:45,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-12 18:41:45,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-12 18:41:45,860 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-12 18:41:46,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:41:46,087 INFO L93 Difference]: Finished difference Result 103 states and 137 transitions. [2024-10-12 18:41:46,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 18:41:46,087 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2024-10-12 18:41:46,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:41:46,088 INFO L225 Difference]: With dead ends: 103 [2024-10-12 18:41:46,088 INFO L226 Difference]: Without dead ends: 101 [2024-10-12 18:41:46,089 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-12 18:41:46,089 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 18 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 18:41:46,090 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 204 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 18:41:46,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-10-12 18:41:46,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2024-10-12 18:41:46,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 68 states have (on average 1.2647058823529411) internal successors, (86), 69 states have internal predecessors, (86), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-10-12 18:41:46,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 131 transitions. [2024-10-12 18:41:46,102 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 131 transitions. Word has length 26 [2024-10-12 18:41:46,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:41:46,102 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 131 transitions. [2024-10-12 18:41:46,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-12 18:41:46,102 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 131 transitions. [2024-10-12 18:41:46,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-12 18:41:46,103 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:41:46,103 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:41:46,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-12 18:41:46,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:41:46,303 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:41:46,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:41:46,304 INFO L85 PathProgramCache]: Analyzing trace with hash 612242103, now seen corresponding path program 1 times [2024-10-12 18:41:46,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:41:46,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919392877] [2024-10-12 18:41:46,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:46,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:41:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:41:46,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602789599] [2024-10-12 18:41:46,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:46,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:41:46,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:41:46,326 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) [2024-10-12 18:41:46,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 18:41:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:46,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-12 18:41:46,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:41:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-12 18:41:46,420 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 18:41:46,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:41:46,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919392877] [2024-10-12 18:41:46,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:41:46,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602789599] [2024-10-12 18:41:46,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602789599] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:41:46,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:41:46,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 18:41:46,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351836007] [2024-10-12 18:41:46,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:41:46,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 18:41:46,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:41:46,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 18:41:46,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 18:41:46,421 INFO L87 Difference]: Start difference. First operand 97 states and 131 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-12 18:41:46,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:41:46,480 INFO L93 Difference]: Finished difference Result 143 states and 203 transitions. [2024-10-12 18:41:46,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 18:41:46,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2024-10-12 18:41:46,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:41:46,485 INFO L225 Difference]: With dead ends: 143 [2024-10-12 18:41:46,485 INFO L226 Difference]: Without dead ends: 141 [2024-10-12 18:41:46,485 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 18:41:46,486 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:41:46,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 97 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:41:46,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-10-12 18:41:46,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 135. [2024-10-12 18:41:46,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 85 states have (on average 1.2941176470588236) internal successors, (110), 86 states have internal predecessors, (110), 43 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2024-10-12 18:41:46,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 195 transitions. [2024-10-12 18:41:46,519 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 195 transitions. Word has length 31 [2024-10-12 18:41:46,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:41:46,521 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 195 transitions. [2024-10-12 18:41:46,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-12 18:41:46,521 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 195 transitions. [2024-10-12 18:41:46,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-12 18:41:46,522 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:41:46,522 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:41:46,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-12 18:41:46,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:41:46,729 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:41:46,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:41:46,729 INFO L85 PathProgramCache]: Analyzing trace with hash -321449679, now seen corresponding path program 1 times [2024-10-12 18:41:46,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:41:46,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903319823] [2024-10-12 18:41:46,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:46,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:41:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:41:46,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751661084] [2024-10-12 18:41:46,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:46,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:41:46,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:41:46,749 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) [2024-10-12 18:41:46,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 18:41:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:46,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-12 18:41:46,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:41:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:41:46,907 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:41:46,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:41:46,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903319823] [2024-10-12 18:41:46,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:41:46,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751661084] [2024-10-12 18:41:46,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751661084] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:41:46,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 18:41:46,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-10-12 18:41:46,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120262373] [2024-10-12 18:41:46,951 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 18:41:46,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-12 18:41:46,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:41:46,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-12 18:41:46,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-12 18:41:46,952 INFO L87 Difference]: Start difference. First operand 135 states and 195 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 18:41:47,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:41:47,081 INFO L93 Difference]: Finished difference Result 148 states and 206 transitions. [2024-10-12 18:41:47,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 18:41:47,081 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-10-12 18:41:47,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:41:47,084 INFO L225 Difference]: With dead ends: 148 [2024-10-12 18:41:47,084 INFO L226 Difference]: Without dead ends: 146 [2024-10-12 18:41:47,084 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-12 18:41:47,085 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 26 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:41:47,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 170 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:41:47,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-10-12 18:41:47,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2024-10-12 18:41:47,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.2747252747252746) internal successors, (116), 92 states have internal predecessors, (116), 43 states have call successors, (43), 8 states have call predecessors, (43), 8 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2024-10-12 18:41:47,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 201 transitions. [2024-10-12 18:41:47,104 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 201 transitions. Word has length 31 [2024-10-12 18:41:47,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:41:47,104 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 201 transitions. [2024-10-12 18:41:47,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 18:41:47,105 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 201 transitions. [2024-10-12 18:41:47,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-12 18:41:47,106 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:41:47,106 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:41:47,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-12 18:41:47,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:41:47,310 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:41:47,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:41:47,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1386643127, now seen corresponding path program 2 times [2024-10-12 18:41:47,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:41:47,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820355560] [2024-10-12 18:41:47,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:47,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:41:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:47,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:41:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:47,376 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 18:41:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:41:47,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:41:47,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820355560] [2024-10-12 18:41:47,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820355560] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:41:47,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:41:47,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 18:41:47,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345149249] [2024-10-12 18:41:47,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:41:47,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 18:41:47,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:41:47,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 18:41:47,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 18:41:47,384 INFO L87 Difference]: Start difference. First operand 143 states and 201 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-12 18:41:47,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:41:47,472 INFO L93 Difference]: Finished difference Result 182 states and 253 transitions. [2024-10-12 18:41:47,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 18:41:47,472 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2024-10-12 18:41:47,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:41:47,473 INFO L225 Difference]: With dead ends: 182 [2024-10-12 18:41:47,473 INFO L226 Difference]: Without dead ends: 126 [2024-10-12 18:41:47,474 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-12 18:41:47,474 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 18 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:41:47,474 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 135 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:41:47,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-10-12 18:41:47,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 118. [2024-10-12 18:41:47,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 75 states have internal predecessors, (90), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2024-10-12 18:41:47,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 159 transitions. [2024-10-12 18:41:47,503 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 159 transitions. Word has length 31 [2024-10-12 18:41:47,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:41:47,503 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 159 transitions. [2024-10-12 18:41:47,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-12 18:41:47,504 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 159 transitions. [2024-10-12 18:41:47,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-12 18:41:47,505 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:41:47,505 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:41:47,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-12 18:41:47,506 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:41:47,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:41:47,506 INFO L85 PathProgramCache]: Analyzing trace with hash 4291222, now seen corresponding path program 1 times [2024-10-12 18:41:47,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:41:47,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377538439] [2024-10-12 18:41:47,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:47,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:41:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:41:47,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306932750] [2024-10-12 18:41:47,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:47,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:41:47,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:41:47,524 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:41:47,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-12 18:41:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:47,567 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-12 18:41:47,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:41:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-12 18:41:47,603 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 18:41:47,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:41:47,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377538439] [2024-10-12 18:41:47,603 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:41:47,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306932750] [2024-10-12 18:41:47,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306932750] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:41:47,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:41:47,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 18:41:47,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895571892] [2024-10-12 18:41:47,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:41:47,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 18:41:47,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:41:47,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 18:41:47,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 18:41:47,606 INFO L87 Difference]: Start difference. First operand 118 states and 159 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-12 18:41:47,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:41:47,650 INFO L93 Difference]: Finished difference Result 176 states and 256 transitions. [2024-10-12 18:41:47,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 18:41:47,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-10-12 18:41:47,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:41:47,654 INFO L225 Difference]: With dead ends: 176 [2024-10-12 18:41:47,654 INFO L226 Difference]: Without dead ends: 174 [2024-10-12 18:41:47,655 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 18:41:47,656 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:41:47,656 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 105 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:41:47,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-10-12 18:41:47,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 162. [2024-10-12 18:41:47,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 85 states have (on average 1.188235294117647) internal successors, (101), 94 states have internal predecessors, (101), 67 states have call successors, (67), 9 states have call predecessors, (67), 9 states have return successors, (66), 58 states have call predecessors, (66), 66 states have call successors, (66) [2024-10-12 18:41:47,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 234 transitions. [2024-10-12 18:41:47,682 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 234 transitions. Word has length 36 [2024-10-12 18:41:47,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:41:47,683 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 234 transitions. [2024-10-12 18:41:47,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-12 18:41:47,683 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 234 transitions. [2024-10-12 18:41:47,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-12 18:41:47,684 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:41:47,684 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:41:47,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-12 18:41:47,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:41:47,888 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:41:47,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:41:47,889 INFO L85 PathProgramCache]: Analyzing trace with hash -303761292, now seen corresponding path program 1 times [2024-10-12 18:41:47,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:41:47,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432745753] [2024-10-12 18:41:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:47,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:41:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:41:47,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127959613] [2024-10-12 18:41:47,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:47,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:41:47,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:41:47,914 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:41:47,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-12 18:41:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:47,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-12 18:41:47,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:41:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-12 18:41:48,521 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:41:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-12 18:41:49,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:41:49,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432745753] [2024-10-12 18:41:49,742 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:41:49,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127959613] [2024-10-12 18:41:49,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127959613] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:41:49,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:41:49,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-10-12 18:41:49,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707091862] [2024-10-12 18:41:49,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:41:49,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-12 18:41:49,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:41:49,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-12 18:41:49,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-10-12 18:41:49,745 INFO L87 Difference]: Start difference. First operand 162 states and 234 transitions. Second operand has 23 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-10-12 18:41:52,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:41:52,326 INFO L93 Difference]: Finished difference Result 441 states and 659 transitions. [2024-10-12 18:41:52,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-12 18:41:52,327 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 48 [2024-10-12 18:41:52,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:41:52,330 INFO L225 Difference]: With dead ends: 441 [2024-10-12 18:41:52,330 INFO L226 Difference]: Without dead ends: 338 [2024-10-12 18:41:52,332 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2024-10-12 18:41:52,332 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 169 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:41:52,332 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 302 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-12 18:41:52,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2024-10-12 18:41:52,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 252. [2024-10-12 18:41:52,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 148 states have (on average 1.2094594594594594) internal successors, (179), 155 states have internal predecessors, (179), 91 states have call successors, (91), 12 states have call predecessors, (91), 12 states have return successors, (90), 84 states have call predecessors, (90), 90 states have call successors, (90) [2024-10-12 18:41:52,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 360 transitions. [2024-10-12 18:41:52,393 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 360 transitions. Word has length 48 [2024-10-12 18:41:52,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:41:52,393 INFO L471 AbstractCegarLoop]: Abstraction has 252 states and 360 transitions. [2024-10-12 18:41:52,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-10-12 18:41:52,394 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 360 transitions. [2024-10-12 18:41:52,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-12 18:41:52,395 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:41:52,395 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:41:52,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-12 18:41:52,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-12 18:41:52,596 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:41:52,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:41:52,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1373066647, now seen corresponding path program 1 times [2024-10-12 18:41:52,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:41:52,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375876597] [2024-10-12 18:41:52,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:52,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:41:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:41:52,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498349559] [2024-10-12 18:41:52,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:52,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:41:52,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:41:52,625 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:41:52,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-12 18:41:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:52,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-12 18:41:52,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:41:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-10-12 18:41:52,776 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:41:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-10-12 18:41:52,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:41:52,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375876597] [2024-10-12 18:41:52,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:41:52,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498349559] [2024-10-12 18:41:52,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498349559] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-12 18:41:52,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 18:41:52,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-10-12 18:41:52,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329367520] [2024-10-12 18:41:52,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:41:52,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 18:41:52,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:41:52,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 18:41:52,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-12 18:41:52,885 INFO L87 Difference]: Start difference. First operand 252 states and 360 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 18:41:53,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:41:53,024 INFO L93 Difference]: Finished difference Result 258 states and 365 transitions. [2024-10-12 18:41:53,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 18:41:53,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 58 [2024-10-12 18:41:53,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:41:53,029 INFO L225 Difference]: With dead ends: 258 [2024-10-12 18:41:53,029 INFO L226 Difference]: Without dead ends: 256 [2024-10-12 18:41:53,029 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-12 18:41:53,030 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:41:53,030 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 100 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:41:53,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-10-12 18:41:53,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2024-10-12 18:41:53,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 151 states have (on average 1.205298013245033) internal successors, (182), 158 states have internal predecessors, (182), 91 states have call successors, (91), 13 states have call predecessors, (91), 13 states have return successors, (90), 84 states have call predecessors, (90), 90 states have call successors, (90) [2024-10-12 18:41:53,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 363 transitions. [2024-10-12 18:41:53,092 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 363 transitions. Word has length 58 [2024-10-12 18:41:53,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:41:53,092 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 363 transitions. [2024-10-12 18:41:53,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 18:41:53,092 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 363 transitions. [2024-10-12 18:41:53,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-12 18:41:53,093 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:41:53,093 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:41:53,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-12 18:41:53,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:41:53,298 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:41:53,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:41:53,298 INFO L85 PathProgramCache]: Analyzing trace with hash 229048754, now seen corresponding path program 1 times [2024-10-12 18:41:53,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:41:53,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150538861] [2024-10-12 18:41:53,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:53,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:41:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:41:53,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874357428] [2024-10-12 18:41:53,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:53,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:41:53,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:41:53,316 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:41:53,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-12 18:41:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:53,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-12 18:41:53,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:41:53,692 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-12 18:41:53,693 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:41:53,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:41:53,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150538861] [2024-10-12 18:41:53,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:41:53,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874357428] [2024-10-12 18:41:53,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874357428] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:41:53,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 18:41:53,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-10-12 18:41:53,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127036876] [2024-10-12 18:41:53,817 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 18:41:53,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-12 18:41:53,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:41:53,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-12 18:41:53,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-10-12 18:41:53,818 INFO L87 Difference]: Start difference. First operand 256 states and 363 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-12 18:41:54,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:41:54,418 INFO L93 Difference]: Finished difference Result 314 states and 450 transitions. [2024-10-12 18:41:54,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-12 18:41:54,418 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 56 [2024-10-12 18:41:54,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:41:54,420 INFO L225 Difference]: With dead ends: 314 [2024-10-12 18:41:54,420 INFO L226 Difference]: Without dead ends: 312 [2024-10-12 18:41:54,420 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2024-10-12 18:41:54,420 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 73 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 18:41:54,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 489 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 18:41:54,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2024-10-12 18:41:54,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 307. [2024-10-12 18:41:54,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 177 states have (on average 1.2090395480225988) internal successors, (214), 187 states have internal predecessors, (214), 115 states have call successors, (115), 14 states have call predecessors, (115), 14 states have return successors, (114), 105 states have call predecessors, (114), 114 states have call successors, (114) [2024-10-12 18:41:54,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 443 transitions. [2024-10-12 18:41:54,501 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 443 transitions. Word has length 56 [2024-10-12 18:41:54,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:41:54,502 INFO L471 AbstractCegarLoop]: Abstraction has 307 states and 443 transitions. [2024-10-12 18:41:54,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-12 18:41:54,502 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 443 transitions. [2024-10-12 18:41:54,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-12 18:41:54,503 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:41:54,503 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:41:54,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-12 18:41:54,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-12 18:41:54,704 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:41:54,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:41:54,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1791327615, now seen corresponding path program 2 times [2024-10-12 18:41:54,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:41:54,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121060684] [2024-10-12 18:41:54,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:54,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:41:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:54,746 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:41:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:54,748 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 18:41:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:54,749 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-12 18:41:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:54,751 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-12 18:41:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:54,753 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-12 18:41:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:54,755 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-12 18:41:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:54,761 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-12 18:41:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:54,762 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-10-12 18:41:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-10-12 18:41:54,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:41:54,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121060684] [2024-10-12 18:41:54,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121060684] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:41:54,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:41:54,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 18:41:54,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723649894] [2024-10-12 18:41:54,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:41:54,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 18:41:54,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:41:54,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 18:41:54,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 18:41:54,769 INFO L87 Difference]: Start difference. First operand 307 states and 443 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-12 18:41:54,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:41:54,880 INFO L93 Difference]: Finished difference Result 530 states and 767 transitions. [2024-10-12 18:41:54,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 18:41:54,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 61 [2024-10-12 18:41:54,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:41:54,883 INFO L225 Difference]: With dead ends: 530 [2024-10-12 18:41:54,883 INFO L226 Difference]: Without dead ends: 316 [2024-10-12 18:41:54,883 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 18:41:54,884 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:41:54,884 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 96 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:41:54,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-10-12 18:41:54,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 304. [2024-10-12 18:41:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 182 states have (on average 1.2087912087912087) internal successors, (220), 183 states have internal predecessors, (220), 107 states have call successors, (107), 14 states have call predecessors, (107), 14 states have return successors, (106), 106 states have call predecessors, (106), 106 states have call successors, (106) [2024-10-12 18:41:54,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 433 transitions. [2024-10-12 18:41:54,954 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 433 transitions. Word has length 61 [2024-10-12 18:41:54,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:41:54,954 INFO L471 AbstractCegarLoop]: Abstraction has 304 states and 433 transitions. [2024-10-12 18:41:54,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-12 18:41:54,955 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 433 transitions. [2024-10-12 18:41:54,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-12 18:41:54,955 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:41:54,955 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:41:54,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-12 18:41:54,955 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:41:54,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:41:54,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1569947899, now seen corresponding path program 3 times [2024-10-12 18:41:54,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:41:54,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266787348] [2024-10-12 18:41:54,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:54,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:41:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:41:54,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018175037] [2024-10-12 18:41:54,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 18:41:54,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:41:54,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:41:54,967 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:41:54,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-12 18:41:55,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-12 18:41:55,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:41:55,030 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-12 18:41:55,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:41:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-12 18:41:55,552 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:42:00,339 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-12 18:42:00,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:42:00,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266787348] [2024-10-12 18:42:00,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:42:00,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018175037] [2024-10-12 18:42:00,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018175037] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:42:00,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:42:00,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2024-10-12 18:42:00,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439645084] [2024-10-12 18:42:00,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:42:00,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-12 18:42:00,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:42:00,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-12 18:42:00,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2024-10-12 18:42:00,344 INFO L87 Difference]: Start difference. First operand 304 states and 433 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2024-10-12 18:42:03,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-12 18:42:05,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:42:05,289 INFO L93 Difference]: Finished difference Result 402 states and 560 transitions. [2024-10-12 18:42:05,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-12 18:42:05,291 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 61 [2024-10-12 18:42:05,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:42:05,293 INFO L225 Difference]: With dead ends: 402 [2024-10-12 18:42:05,293 INFO L226 Difference]: Without dead ends: 400 [2024-10-12 18:42:05,295 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=488, Invalid=1768, Unknown=0, NotChecked=0, Total=2256 [2024-10-12 18:42:05,295 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 194 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-10-12 18:42:05,295 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 442 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-10-12 18:42:05,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2024-10-12 18:42:05,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 378. [2024-10-12 18:42:05,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 228 states have (on average 1.206140350877193) internal successors, (275), 229 states have internal predecessors, (275), 131 states have call successors, (131), 18 states have call predecessors, (131), 18 states have return successors, (130), 130 states have call predecessors, (130), 130 states have call successors, (130) [2024-10-12 18:42:05,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 536 transitions. [2024-10-12 18:42:05,437 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 536 transitions. Word has length 61 [2024-10-12 18:42:05,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:42:05,437 INFO L471 AbstractCegarLoop]: Abstraction has 378 states and 536 transitions. [2024-10-12 18:42:05,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2024-10-12 18:42:05,437 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 536 transitions. [2024-10-12 18:42:05,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-10-12 18:42:05,451 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:42:05,451 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:42:05,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-12 18:42:05,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-12 18:42:05,652 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:42:05,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:42:05,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1081992304, now seen corresponding path program 1 times [2024-10-12 18:42:05,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:42:05,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545461865] [2024-10-12 18:42:05,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:42:05,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:42:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:42:05,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171575766] [2024-10-12 18:42:05,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:42:05,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:42:05,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:42:05,679 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:42:05,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-12 18:42:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:42:05,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-10-12 18:42:05,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:42:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-10-12 18:42:06,596 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:42:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-10-12 18:42:09,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:42:09,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545461865] [2024-10-12 18:42:09,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:42:09,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171575766] [2024-10-12 18:42:09,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171575766] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:42:09,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:42:09,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2024-10-12 18:42:09,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521430163] [2024-10-12 18:42:09,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:42:09,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-12 18:42:09,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:42:09,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-12 18:42:09,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2024-10-12 18:42:09,279 INFO L87 Difference]: Start difference. First operand 378 states and 536 transitions. Second operand has 33 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-10-12 18:42:19,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:42:19,650 INFO L93 Difference]: Finished difference Result 572 states and 827 transitions. [2024-10-12 18:42:19,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-10-12 18:42:19,650 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 75 [2024-10-12 18:42:19,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:42:19,653 INFO L225 Difference]: With dead ends: 572 [2024-10-12 18:42:19,653 INFO L226 Difference]: Without dead ends: 568 [2024-10-12 18:42:19,654 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1200, Invalid=4962, Unknown=0, NotChecked=0, Total=6162 [2024-10-12 18:42:19,654 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 290 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-10-12 18:42:19,655 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 844 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 1232 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-10-12 18:42:19,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2024-10-12 18:42:20,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 522. [2024-10-12 18:42:20,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 317 states have (on average 1.220820189274448) internal successors, (387), 318 states have internal predecessors, (387), 183 states have call successors, (183), 21 states have call predecessors, (183), 21 states have return successors, (182), 182 states have call predecessors, (182), 182 states have call successors, (182) [2024-10-12 18:42:20,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 752 transitions. [2024-10-12 18:42:20,011 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 752 transitions. Word has length 75 [2024-10-12 18:42:20,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:42:20,011 INFO L471 AbstractCegarLoop]: Abstraction has 522 states and 752 transitions. [2024-10-12 18:42:20,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-10-12 18:42:20,012 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 752 transitions. [2024-10-12 18:42:20,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-10-12 18:42:20,013 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:42:20,013 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:42:20,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-12 18:42:20,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-12 18:42:20,217 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:42:20,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:42:20,217 INFO L85 PathProgramCache]: Analyzing trace with hash 378611015, now seen corresponding path program 1 times [2024-10-12 18:42:20,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:42:20,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361009862] [2024-10-12 18:42:20,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:42:20,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:42:20,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:42:20,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276141188] [2024-10-12 18:42:20,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:42:20,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:42:20,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:42:20,232 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:42:20,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-12 18:42:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:42:20,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-12 18:42:20,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:42:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-10-12 18:42:20,564 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:42:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-10-12 18:42:20,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:42:20,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361009862] [2024-10-12 18:42:20,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:42:20,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276141188] [2024-10-12 18:42:20,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276141188] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:42:20,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:42:20,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-10-12 18:42:20,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383888494] [2024-10-12 18:42:20,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:42:20,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-12 18:42:20,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:42:20,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-12 18:42:20,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-10-12 18:42:20,948 INFO L87 Difference]: Start difference. First operand 522 states and 752 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-10-12 18:42:22,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:42:22,991 INFO L93 Difference]: Finished difference Result 1077 states and 1681 transitions. [2024-10-12 18:42:22,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-12 18:42:22,992 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 78 [2024-10-12 18:42:22,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:42:22,996 INFO L225 Difference]: With dead ends: 1077 [2024-10-12 18:42:22,997 INFO L226 Difference]: Without dead ends: 1075 [2024-10-12 18:42:22,997 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-10-12 18:42:22,998 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 139 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-12 18:42:22,998 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 409 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-12 18:42:22,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2024-10-12 18:42:23,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1015. [2024-10-12 18:42:23,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 514 states have (on average 1.3035019455252919) internal successors, (670), 515 states have internal predecessors, (670), 475 states have call successors, (475), 25 states have call predecessors, (475), 25 states have return successors, (474), 474 states have call predecessors, (474), 474 states have call successors, (474) [2024-10-12 18:42:23,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1619 transitions. [2024-10-12 18:42:23,835 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1619 transitions. Word has length 78 [2024-10-12 18:42:23,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:42:23,835 INFO L471 AbstractCegarLoop]: Abstraction has 1015 states and 1619 transitions. [2024-10-12 18:42:23,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-10-12 18:42:23,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1619 transitions. [2024-10-12 18:42:23,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-10-12 18:42:23,836 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:42:23,836 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:42:23,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-12 18:42:24,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-12 18:42:24,041 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:42:24,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:42:24,041 INFO L85 PathProgramCache]: Analyzing trace with hash -555080767, now seen corresponding path program 1 times [2024-10-12 18:42:24,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:42:24,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524165657] [2024-10-12 18:42:24,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:42:24,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:42:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:42:24,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726059619] [2024-10-12 18:42:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:42:24,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:42:24,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:42:24,060 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:42:24,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-12 18:42:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:42:24,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-12 18:42:24,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:42:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-10-12 18:42:24,711 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:42:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2024-10-12 18:42:29,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:42:29,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524165657] [2024-10-12 18:42:29,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:42:29,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726059619] [2024-10-12 18:42:29,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726059619] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:42:29,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:42:29,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-10-12 18:42:29,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304692607] [2024-10-12 18:42:29,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:42:29,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-12 18:42:29,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:42:29,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-12 18:42:29,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-10-12 18:42:29,859 INFO L87 Difference]: Start difference. First operand 1015 states and 1619 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 20 states have internal predecessors, (51), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-10-12 18:42:39,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:42:39,630 INFO L93 Difference]: Finished difference Result 1402 states and 2247 transitions. [2024-10-12 18:42:39,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-10-12 18:42:39,631 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 20 states have internal predecessors, (51), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 78 [2024-10-12 18:42:39,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:42:39,637 INFO L225 Difference]: With dead ends: 1402 [2024-10-12 18:42:39,637 INFO L226 Difference]: Without dead ends: 1400 [2024-10-12 18:42:39,638 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=711, Invalid=2829, Unknown=0, NotChecked=0, Total=3540 [2024-10-12 18:42:39,639 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 186 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-10-12 18:42:39,639 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 579 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-10-12 18:42:39,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2024-10-12 18:42:40,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1272. [2024-10-12 18:42:40,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 640 states have (on average 1.3109375) internal successors, (839), 641 states have internal predecessors, (839), 603 states have call successors, (603), 28 states have call predecessors, (603), 28 states have return successors, (602), 602 states have call predecessors, (602), 602 states have call successors, (602) [2024-10-12 18:42:40,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 2044 transitions. [2024-10-12 18:42:40,811 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 2044 transitions. Word has length 78 [2024-10-12 18:42:40,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:42:40,818 INFO L471 AbstractCegarLoop]: Abstraction has 1272 states and 2044 transitions. [2024-10-12 18:42:40,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 20 states have internal predecessors, (51), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-10-12 18:42:40,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 2044 transitions. [2024-10-12 18:42:40,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-10-12 18:42:40,819 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:42:40,819 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:42:40,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-12 18:42:41,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:42:41,029 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:42:41,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:42:41,029 INFO L85 PathProgramCache]: Analyzing trace with hash 484531843, now seen corresponding path program 4 times [2024-10-12 18:42:41,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:42:41,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784836138] [2024-10-12 18:42:41,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:42:41,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:42:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:42:41,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714946185] [2024-10-12 18:42:41,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 18:42:41,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:42:41,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:42:41,065 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:42:41,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-12 18:42:41,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 18:42:41,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:42:41,133 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-12 18:42:41,134 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:42:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-10-12 18:42:41,944 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:42:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-10-12 18:42:42,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:42:42,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784836138] [2024-10-12 18:42:42,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:42:42,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714946185] [2024-10-12 18:42:42,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714946185] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:42:42,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:42:42,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 21 [2024-10-12 18:42:42,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861394162] [2024-10-12 18:42:42,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:42:42,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-12 18:42:42,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:42:42,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-12 18:42:42,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2024-10-12 18:42:42,214 INFO L87 Difference]: Start difference. First operand 1272 states and 2044 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 18 states have internal predecessors, (61), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2024-10-12 18:42:45,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:42:45,876 INFO L93 Difference]: Finished difference Result 1391 states and 2225 transitions. [2024-10-12 18:42:45,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-12 18:42:45,877 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 18 states have internal predecessors, (61), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 81 [2024-10-12 18:42:45,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:42:45,883 INFO L225 Difference]: With dead ends: 1391 [2024-10-12 18:42:45,883 INFO L226 Difference]: Without dead ends: 1389 [2024-10-12 18:42:45,884 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2024-10-12 18:42:45,884 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 75 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:42:45,885 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 470 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-12 18:42:45,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2024-10-12 18:42:47,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1296. [2024-10-12 18:42:47,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 658 states have (on average 1.3024316109422491) internal successors, (857), 659 states have internal predecessors, (857), 603 states have call successors, (603), 34 states have call predecessors, (603), 34 states have return successors, (602), 602 states have call predecessors, (602), 602 states have call successors, (602) [2024-10-12 18:42:47,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 2062 transitions. [2024-10-12 18:42:47,090 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 2062 transitions. Word has length 81 [2024-10-12 18:42:47,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:42:47,090 INFO L471 AbstractCegarLoop]: Abstraction has 1296 states and 2062 transitions. [2024-10-12 18:42:47,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 18 states have internal predecessors, (61), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2024-10-12 18:42:47,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 2062 transitions. [2024-10-12 18:42:47,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-10-12 18:42:47,092 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:42:47,092 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:42:47,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-12 18:42:47,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:42:47,296 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:42:47,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:42:47,296 INFO L85 PathProgramCache]: Analyzing trace with hash -2018595463, now seen corresponding path program 2 times [2024-10-12 18:42:47,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:42:47,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103045481] [2024-10-12 18:42:47,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:42:47,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:42:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:42:47,432 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:42:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:42:47,434 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 18:42:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:42:47,435 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-12 18:42:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:42:47,437 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-12 18:42:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:42:47,439 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-12 18:42:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:42:47,441 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-12 18:42:47,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:42:47,443 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-10-12 18:42:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:42:47,445 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-10-12 18:42:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:42:47,447 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-10-12 18:42:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:42:47,449 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-10-12 18:42:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:42:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-10-12 18:42:47,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:42:47,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103045481] [2024-10-12 18:42:47,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103045481] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:42:47,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446438859] [2024-10-12 18:42:47,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 18:42:47,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:42:47,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:42:47,453 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:42:47,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-12 18:42:47,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 18:42:47,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:42:47,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-12 18:42:47,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:42:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-10-12 18:42:47,563 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:42:47,668 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-10-12 18:42:47,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446438859] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:42:47,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:42:47,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-10-12 18:42:47,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884678993] [2024-10-12 18:42:47,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:42:47,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-12 18:42:47,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:42:47,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-12 18:42:47,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-10-12 18:42:47,670 INFO L87 Difference]: Start difference. First operand 1296 states and 2062 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-10-12 18:42:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:42:49,526 INFO L93 Difference]: Finished difference Result 1431 states and 2270 transitions. [2024-10-12 18:42:49,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-12 18:42:49,527 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 83 [2024-10-12 18:42:49,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:42:49,533 INFO L225 Difference]: With dead ends: 1431 [2024-10-12 18:42:49,534 INFO L226 Difference]: Without dead ends: 1424 [2024-10-12 18:42:49,534 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 183 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2024-10-12 18:42:49,535 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 66 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 18:42:49,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 335 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 18:42:49,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2024-10-12 18:42:50,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1251. [2024-10-12 18:42:50,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 625 states have (on average 1.3088) internal successors, (818), 626 states have internal predecessors, (818), 591 states have call successors, (591), 34 states have call predecessors, (591), 34 states have return successors, (590), 590 states have call predecessors, (590), 590 states have call successors, (590) [2024-10-12 18:42:50,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1999 transitions. [2024-10-12 18:42:50,897 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1999 transitions. Word has length 83 [2024-10-12 18:42:50,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:42:50,898 INFO L471 AbstractCegarLoop]: Abstraction has 1251 states and 1999 transitions. [2024-10-12 18:42:50,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-10-12 18:42:50,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1999 transitions. [2024-10-12 18:42:50,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-10-12 18:42:50,900 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:42:50,900 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:42:50,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-12 18:42:51,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:42:51,104 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:42:51,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:42:51,105 INFO L85 PathProgramCache]: Analyzing trace with hash -668510236, now seen corresponding path program 2 times [2024-10-12 18:42:51,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:42:51,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137900386] [2024-10-12 18:42:51,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:42:51,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:42:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:42:51,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926889198] [2024-10-12 18:42:51,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 18:42:51,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:42:51,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:42:51,117 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:42:51,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-12 18:42:51,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 18:42:51,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:42:51,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-12 18:42:51,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:42:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-10-12 18:42:51,947 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:42:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-10-12 18:42:54,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:42:54,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137900386] [2024-10-12 18:42:54,381 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:42:54,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926889198] [2024-10-12 18:42:54,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926889198] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:42:54,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:42:54,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2024-10-12 18:42:54,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961213132] [2024-10-12 18:42:54,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:42:54,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-12 18:42:54,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:42:54,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-12 18:42:54,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2024-10-12 18:42:54,383 INFO L87 Difference]: Start difference. First operand 1251 states and 1999 transitions. Second operand has 24 states, 22 states have (on average 2.272727272727273) internal successors, (50), 23 states have internal predecessors, (50), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2024-10-12 18:43:09,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:43:09,055 INFO L93 Difference]: Finished difference Result 1955 states and 3174 transitions. [2024-10-12 18:43:09,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2024-10-12 18:43:09,055 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.272727272727273) internal successors, (50), 23 states have internal predecessors, (50), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) Word has length 95 [2024-10-12 18:43:09,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:43:09,074 INFO L225 Difference]: With dead ends: 1955 [2024-10-12 18:43:09,074 INFO L226 Difference]: Without dead ends: 1947 [2024-10-12 18:43:09,076 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3251 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1436, Invalid=8664, Unknown=0, NotChecked=0, Total=10100 [2024-10-12 18:43:09,081 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 223 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-10-12 18:43:09,081 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 860 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-10-12 18:43:09,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2024-10-12 18:43:10,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1391. [2024-10-12 18:43:10,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 692 states have (on average 1.3121387283236994) internal successors, (908), 693 states have internal predecessors, (908), 663 states have call successors, (663), 35 states have call predecessors, (663), 35 states have return successors, (662), 662 states have call predecessors, (662), 662 states have call successors, (662) [2024-10-12 18:43:10,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 2233 transitions. [2024-10-12 18:43:10,627 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 2233 transitions. Word has length 95 [2024-10-12 18:43:10,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:43:10,627 INFO L471 AbstractCegarLoop]: Abstraction has 1391 states and 2233 transitions. [2024-10-12 18:43:10,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.272727272727273) internal successors, (50), 23 states have internal predecessors, (50), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2024-10-12 18:43:10,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 2233 transitions. [2024-10-12 18:43:10,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-10-12 18:43:10,631 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:43:10,631 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:43:10,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-12 18:43:10,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:43:10,837 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:43:10,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:43:10,837 INFO L85 PathProgramCache]: Analyzing trace with hash -595923267, now seen corresponding path program 2 times [2024-10-12 18:43:10,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:43:10,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625237383] [2024-10-12 18:43:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:43:10,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:43:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:43:10,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334012760] [2024-10-12 18:43:10,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 18:43:10,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:43:10,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:43:10,870 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:43:10,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-12 18:43:10,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 18:43:10,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:43:10,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-10-12 18:43:10,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:43:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 52 proven. 59 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2024-10-12 18:43:11,897 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:43:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 56 proven. 52 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2024-10-12 18:43:17,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:43:17,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625237383] [2024-10-12 18:43:17,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:43:17,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334012760] [2024-10-12 18:43:17,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334012760] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:43:17,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:43:17,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2024-10-12 18:43:17,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98535430] [2024-10-12 18:43:17,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:43:17,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-12 18:43:17,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:43:17,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-12 18:43:17,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2024-10-12 18:43:17,464 INFO L87 Difference]: Start difference. First operand 1391 states and 2233 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 32 states have internal predecessors, (70), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 11 states have call successors, (30)