./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.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 30672bd579b7f25ffa685cb80d8a419cb542781c19afe0226ba5d9d3cf26984c --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-11 20:03:50,914 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 20:03:50,974 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-11 20:03:50,979 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 20:03:50,981 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 20:03:50,997 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 20:03:50,998 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 20:03:50,998 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 20:03:50,998 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 20:03:50,999 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 20:03:50,999 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 20:03:50,999 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 20:03:51,000 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 20:03:51,000 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 20:03:51,000 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 20:03:51,000 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 20:03:51,001 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 20:03:51,001 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-11 20:03:51,001 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 20:03:51,001 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-11 20:03:51,002 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 20:03:51,002 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 20:03:51,002 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 20:03:51,003 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 20:03:51,003 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 20:03:51,003 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-11 20:03:51,004 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 20:03:51,004 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 20:03:51,004 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 20:03:51,004 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 20:03:51,005 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 20:03:51,005 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 20:03:51,005 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 20:03:51,005 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 20:03:51,006 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 20:03:51,006 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 20:03:51,006 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 20:03:51,006 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 20:03:51,007 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 20:03:51,007 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 20:03:51,007 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 20:03:51,008 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 20:03:51,009 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30672bd579b7f25ffa685cb80d8a419cb542781c19afe0226ba5d9d3cf26984c [2024-11-11 20:03:51,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 20:03:51,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 20:03:51,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 20:03:51,224 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 20:03:51,225 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 20:03:51,225 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2024-11-11 20:03:52,445 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 20:03:52,586 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 20:03:52,586 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2024-11-11 20:03:52,592 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/056d7f089/f2a3e1afcc294c0e99a64beeb001aaee/FLAGc5b2a7238 [2024-11-11 20:03:52,602 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/056d7f089/f2a3e1afcc294c0e99a64beeb001aaee [2024-11-11 20:03:52,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 20:03:52,605 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 20:03:52,606 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 20:03:52,606 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 20:03:52,611 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 20:03:52,612 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 08:03:52" (1/1) ... [2024-11-11 20:03:52,614 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@784409fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:03:52, skipping insertion in model container [2024-11-11 20:03:52,614 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 08:03:52" (1/1) ... [2024-11-11 20:03:52,630 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 20:03:52,756 WARN L250 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-scaling/egcd2-ll_unwindbound100.c[490,503] [2024-11-11 20:03:52,772 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 20:03:52,779 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 20:03:52,789 WARN L250 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-scaling/egcd2-ll_unwindbound100.c[490,503] [2024-11-11 20:03:52,798 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 20:03:52,810 INFO L204 MainTranslator]: Completed translation [2024-11-11 20:03:52,810 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:03:52 WrapperNode [2024-11-11 20:03:52,810 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 20:03:52,811 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 20:03:52,811 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 20:03:52,811 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 20:03:52,816 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:03:52" (1/1) ... [2024-11-11 20:03:52,826 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:03:52" (1/1) ... [2024-11-11 20:03:52,840 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 86 [2024-11-11 20:03:52,844 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 20:03:52,844 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 20:03:52,844 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 20:03:52,845 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 20:03:52,853 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:03:52" (1/1) ... [2024-11-11 20:03:52,853 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:03:52" (1/1) ... [2024-11-11 20:03:52,854 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:03:52" (1/1) ... [2024-11-11 20:03:52,863 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]. [2024-11-11 20:03:52,863 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:03:52" (1/1) ... [2024-11-11 20:03:52,864 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:03:52" (1/1) ... [2024-11-11 20:03:52,866 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:03:52" (1/1) ... [2024-11-11 20:03:52,870 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:03:52" (1/1) ... [2024-11-11 20:03:52,871 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:03:52" (1/1) ... [2024-11-11 20:03:52,872 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:03:52" (1/1) ... [2024-11-11 20:03:52,873 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 20:03:52,874 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 20:03:52,874 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 20:03:52,874 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 20:03:52,875 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:03:52" (1/1) ... [2024-11-11 20:03:52,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 20:03:52,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:03:52,906 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) [2024-11-11 20:03:52,908 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 [2024-11-11 20:03:52,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 20:03:52,940 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-11 20:03:52,940 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-11 20:03:52,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 20:03:52,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 20:03:52,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 20:03:52,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-11 20:03:52,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-11 20:03:52,990 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 20:03:52,992 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 20:03:53,127 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-11 20:03:53,127 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 20:03:53,139 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 20:03:53,141 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-11 20:03:53,142 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 08:03:53 BoogieIcfgContainer [2024-11-11 20:03:53,142 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 20:03:53,144 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 20:03:53,145 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 20:03:53,147 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 20:03:53,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 08:03:52" (1/3) ... [2024-11-11 20:03:53,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@583cb827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 08:03:53, skipping insertion in model container [2024-11-11 20:03:53,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:03:52" (2/3) ... [2024-11-11 20:03:53,149 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@583cb827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 08:03:53, skipping insertion in model container [2024-11-11 20:03:53,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 08:03:53" (3/3) ... [2024-11-11 20:03:53,150 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound100.c [2024-11-11 20:03:53,163 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 20:03:53,163 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 20:03:53,204 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 20:03:53,210 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;@465ea35c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 20:03:53,210 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 20:03:53,213 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-11 20:03:53,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-11 20:03:53,218 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:03:53,219 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:03:53,219 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:03:53,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:03:53,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1022199732, now seen corresponding path program 1 times [2024-11-11 20:03:53,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:03:53,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894096052] [2024-11-11 20:03:53,230 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:03:53,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:03:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:53,373 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 20:03:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:53,382 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 20:03:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:53,391 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-11 20:03:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:53,400 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-11 20:03:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:53,405 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 20:03:53,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:03:53,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894096052] [2024-11-11 20:03:53,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894096052] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:03:53,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:03:53,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-11 20:03:53,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551809986] [2024-11-11 20:03:53,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:03:53,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-11 20:03:53,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:03:53,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-11 20:03:53,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-11 20:03:53,437 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-11 20:03:53,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:03:53,457 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2024-11-11 20:03:53,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-11 20:03:53,459 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2024-11-11 20:03:53,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:03:53,464 INFO L225 Difference]: With dead ends: 65 [2024-11-11 20:03:53,465 INFO L226 Difference]: Without dead ends: 30 [2024-11-11 20:03:53,467 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-11 20:03:53,470 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:03:53,470 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:03:53,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-11 20:03:53,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-11 20:03:53,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-11 20:03:53,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2024-11-11 20:03:53,498 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 28 [2024-11-11 20:03:53,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:03:53,499 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2024-11-11 20:03:53,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-11 20:03:53,499 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2024-11-11 20:03:53,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-11 20:03:53,500 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:03:53,501 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:03:53,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 20:03:53,501 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:03:53,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:03:53,502 INFO L85 PathProgramCache]: Analyzing trace with hash -455220980, now seen corresponding path program 1 times [2024-11-11 20:03:53,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:03:53,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131794097] [2024-11-11 20:03:53,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:03:53,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:03:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:53,603 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 20:03:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:53,618 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 20:03:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:53,625 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-11 20:03:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:53,638 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-11 20:03:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 20:03:53,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:03:53,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131794097] [2024-11-11 20:03:53,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131794097] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:03:53,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:03:53,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-11 20:03:53,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32454398] [2024-11-11 20:03:53,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:03:53,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-11 20:03:53,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:03:53,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-11 20:03:53,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-11 20:03:53,658 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-11 20:03:53,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:03:53,692 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2024-11-11 20:03:53,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-11 20:03:53,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2024-11-11 20:03:53,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:03:53,695 INFO L225 Difference]: With dead ends: 40 [2024-11-11 20:03:53,695 INFO L226 Difference]: Without dead ends: 32 [2024-11-11 20:03:53,695 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-11 20:03:53,697 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:03:53,697 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:03:53,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-11 20:03:53,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-11 20:03:53,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-11 20:03:53,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2024-11-11 20:03:53,706 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 29 [2024-11-11 20:03:53,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:03:53,708 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2024-11-11 20:03:53,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-11 20:03:53,708 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2024-11-11 20:03:53,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-11 20:03:53,712 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:03:53,712 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:03:53,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-11 20:03:53,713 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:03:53,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:03:53,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1233535180, now seen corresponding path program 1 times [2024-11-11 20:03:53,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:03:53,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18255578] [2024-11-11 20:03:53,714 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:03:53,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:03:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:53,887 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 20:03:53,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:53,893 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 20:03:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:53,929 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-11 20:03:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:53,936 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-11 20:03:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-11 20:03:53,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:03:53,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18255578] [2024-11-11 20:03:53,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18255578] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:03:53,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150466779] [2024-11-11 20:03:53,949 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:03:53,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:03:53,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:03:53,955 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) [2024-11-11 20:03:53,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-11 20:03:54,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:54,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-11 20:03:54,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:03:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 20:03:54,157 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-11 20:03:54,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150466779] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:03:54,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-11 20:03:54,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-11-11 20:03:54,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205651847] [2024-11-11 20:03:54,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:03:54,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-11 20:03:54,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:03:54,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-11 20:03:54,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-11 20:03:54,159 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 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) [2024-11-11 20:03:54,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:03:54,239 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2024-11-11 20:03:54,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-11 20:03:54,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 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 30 [2024-11-11 20:03:54,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:03:54,240 INFO L225 Difference]: With dead ends: 49 [2024-11-11 20:03:54,240 INFO L226 Difference]: Without dead ends: 47 [2024-11-11 20:03:54,241 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-11 20:03:54,241 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 20:03:54,242 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 146 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 20:03:54,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-11 20:03:54,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2024-11-11 20:03:54,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 28 states have internal predecessors, (34), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-11 20:03:54,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2024-11-11 20:03:54,255 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 30 [2024-11-11 20:03:54,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:03:54,255 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2024-11-11 20:03:54,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 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) [2024-11-11 20:03:54,256 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2024-11-11 20:03:54,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-11 20:03:54,257 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:03:54,257 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:03:54,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-11 20:03:54,461 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 [2024-11-11 20:03:54,462 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:03:54,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:03:54,462 INFO L85 PathProgramCache]: Analyzing trace with hash -73118621, now seen corresponding path program 1 times [2024-11-11 20:03:54,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:03:54,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413880026] [2024-11-11 20:03:54,463 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:03:54,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:03:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:03:54,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435347840] [2024-11-11 20:03:54,478 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:03:54,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:03:54,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:03:54,479 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) [2024-11-11 20:03:54,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-11 20:03:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:54,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-11 20:03:54,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:03:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 20:03:54,549 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-11 20:03:54,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:03:54,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413880026] [2024-11-11 20:03:54,550 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:03:54,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435347840] [2024-11-11 20:03:54,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435347840] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:03:54,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:03:54,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-11 20:03:54,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745772309] [2024-11-11 20:03:54,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:03:54,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 20:03:54,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:03:54,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 20:03:54,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-11 20:03:54,552 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-11 20:03:54,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:03:54,596 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2024-11-11 20:03:54,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 20:03:54,596 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2024-11-11 20:03:54,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:03:54,599 INFO L225 Difference]: With dead ends: 66 [2024-11-11 20:03:54,599 INFO L226 Difference]: Without dead ends: 64 [2024-11-11 20:03:54,599 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-11 20:03:54,601 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:03:54,601 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 139 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:03:54,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-11 20:03:54,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2024-11-11 20:03:54,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.303030303030303) internal successors, (43), 37 states have internal predecessors, (43), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-11 20:03:54,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2024-11-11 20:03:54,611 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 32 [2024-11-11 20:03:54,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:03:54,611 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2024-11-11 20:03:54,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-11 20:03:54,611 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2024-11-11 20:03:54,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-11 20:03:54,612 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:03:54,612 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:03:54,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-11 20:03:54,816 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 [2024-11-11 20:03:54,817 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:03:54,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:03:54,817 INFO L85 PathProgramCache]: Analyzing trace with hash -910809492, now seen corresponding path program 1 times [2024-11-11 20:03:54,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:03:54,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499513136] [2024-11-11 20:03:54,818 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:03:54,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:03:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:54,898 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 20:03:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:54,901 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 20:03:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:54,922 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-11 20:03:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:54,926 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-11 20:03:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:54,931 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-11 20:03:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-11 20:03:54,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:03:54,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499513136] [2024-11-11 20:03:54,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499513136] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:03:54,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834712383] [2024-11-11 20:03:54,936 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:03:54,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:03:54,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:03:54,938 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) [2024-11-11 20:03:54,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-11 20:03:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:54,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-11 20:03:54,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:03:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 20:03:55,052 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-11 20:03:55,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834712383] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:03:55,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-11 20:03:55,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-11 20:03:55,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788867670] [2024-11-11 20:03:55,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:03:55,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 20:03:55,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:03:55,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 20:03:55,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-11 20:03:55,055 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-11-11 20:03:55,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:03:55,155 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2024-11-11 20:03:55,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 20:03:55,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 35 [2024-11-11 20:03:55,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:03:55,160 INFO L225 Difference]: With dead ends: 63 [2024-11-11 20:03:55,160 INFO L226 Difference]: Without dead ends: 59 [2024-11-11 20:03:55,160 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-11 20:03:55,161 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 20:03:55,161 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 142 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 20:03:55,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-11 20:03:55,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-11-11 20:03:55,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.25) internal successors, (45), 39 states have internal predecessors, (45), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-11 20:03:55,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2024-11-11 20:03:55,174 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 35 [2024-11-11 20:03:55,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:03:55,174 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2024-11-11 20:03:55,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-11-11 20:03:55,174 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2024-11-11 20:03:55,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-11 20:03:55,175 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:03:55,175 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:03:55,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-11 20:03:55,379 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 [2024-11-11 20:03:55,380 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:03:55,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:03:55,380 INFO L85 PathProgramCache]: Analyzing trace with hash 96561445, now seen corresponding path program 1 times [2024-11-11 20:03:55,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:03:55,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571229415] [2024-11-11 20:03:55,380 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:03:55,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:03:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:55,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 20:03:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:55,434 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 20:03:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:55,437 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-11 20:03:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:55,442 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-11 20:03:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 20:03:55,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:03:55,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571229415] [2024-11-11 20:03:55,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571229415] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:03:55,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:03:55,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-11 20:03:55,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962146747] [2024-11-11 20:03:55,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:03:55,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 20:03:55,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:03:55,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 20:03:55,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-11 20:03:55,451 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-11 20:03:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:03:55,473 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2024-11-11 20:03:55,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 20:03:55,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2024-11-11 20:03:55,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:03:55,475 INFO L225 Difference]: With dead ends: 84 [2024-11-11 20:03:55,476 INFO L226 Difference]: Without dead ends: 58 [2024-11-11 20:03:55,477 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-11 20:03:55,477 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:03:55,477 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 122 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:03:55,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-11 20:03:55,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-11 20:03:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 39 states have internal predecessors, (44), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-11 20:03:55,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2024-11-11 20:03:55,491 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 35 [2024-11-11 20:03:55,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:03:55,491 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2024-11-11 20:03:55,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-11 20:03:55,492 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2024-11-11 20:03:55,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-11 20:03:55,493 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:03:55,493 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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] [2024-11-11 20:03:55,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-11 20:03:55,494 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:03:55,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:03:55,494 INFO L85 PathProgramCache]: Analyzing trace with hash 2115683101, now seen corresponding path program 1 times [2024-11-11 20:03:55,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:03:55,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272245301] [2024-11-11 20:03:55,494 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:03:55,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:03:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:03:55,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31903287] [2024-11-11 20:03:55,514 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:03:55,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:03:55,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:03:55,516 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) [2024-11-11 20:03:55,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-11 20:03:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:55,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-11 20:03:55,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:03:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-11 20:03:55,678 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-11 20:03:55,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:03:55,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272245301] [2024-11-11 20:03:55,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:03:55,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31903287] [2024-11-11 20:03:55,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31903287] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:03:55,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:03:55,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-11 20:03:55,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2968426] [2024-11-11 20:03:55,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:03:55,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 20:03:55,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:03:55,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 20:03:55,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-11 20:03:55,680 INFO L87 Difference]: Start difference. First operand 58 states and 75 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-11 20:03:55,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:03:55,723 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-11-11 20:03:55,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 20:03:55,723 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2024-11-11 20:03:55,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:03:55,724 INFO L225 Difference]: With dead ends: 65 [2024-11-11 20:03:55,724 INFO L226 Difference]: Without dead ends: 63 [2024-11-11 20:03:55,724 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-11 20:03:55,725 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:03:55,725 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:03:55,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-11 20:03:55,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-11-11 20:03:55,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.205128205128205) internal successors, (47), 42 states have internal predecessors, (47), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-11 20:03:55,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2024-11-11 20:03:55,732 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 47 [2024-11-11 20:03:55,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:03:55,732 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2024-11-11 20:03:55,732 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-11 20:03:55,732 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2024-11-11 20:03:55,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-11 20:03:55,733 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:03:55,733 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2024-11-11 20:03:55,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-11 20:03:55,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:03:55,937 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:03:55,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:03:55,938 INFO L85 PathProgramCache]: Analyzing trace with hash 559010241, now seen corresponding path program 1 times [2024-11-11 20:03:55,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:03:55,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021129398] [2024-11-11 20:03:55,938 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:03:55,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:03:55,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:03:55,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797993951] [2024-11-11 20:03:55,951 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:03:55,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:03:55,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:03:55,953 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) [2024-11-11 20:03:55,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-11 20:03:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:55,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-11 20:03:56,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:03:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-11 20:03:56,055 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:03:56,119 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-11 20:03:56,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:03:56,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021129398] [2024-11-11 20:03:56,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:03:56,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797993951] [2024-11-11 20:03:56,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797993951] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-11 20:03:56,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-11 20:03:56,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-11 20:03:56,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969788110] [2024-11-11 20:03:56,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:03:56,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 20:03:56,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:03:56,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 20:03:56,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-11 20:03:56,121 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-11 20:03:56,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:03:56,156 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2024-11-11 20:03:56,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 20:03:56,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 55 [2024-11-11 20:03:56,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:03:56,158 INFO L225 Difference]: With dead ends: 68 [2024-11-11 20:03:56,158 INFO L226 Difference]: Without dead ends: 66 [2024-11-11 20:03:56,158 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-11 20:03:56,158 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:03:56,159 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 124 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:03:56,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-11 20:03:56,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2024-11-11 20:03:56,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-11 20:03:56,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2024-11-11 20:03:56,166 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 55 [2024-11-11 20:03:56,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:03:56,166 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2024-11-11 20:03:56,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-11 20:03:56,166 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2024-11-11 20:03:56,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-11 20:03:56,167 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:03:56,167 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:03:56,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-11 20:03:56,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:03:56,368 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:03:56,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:03:56,369 INFO L85 PathProgramCache]: Analyzing trace with hash -879665460, now seen corresponding path program 1 times [2024-11-11 20:03:56,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:03:56,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268621289] [2024-11-11 20:03:56,369 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:03:56,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:03:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:56,437 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 20:03:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:56,440 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 20:03:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:56,445 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-11 20:03:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:56,448 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-11 20:03:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:56,451 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-11 20:03:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:56,463 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-11 20:03:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:56,468 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-11 20:03:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:56,472 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-11 20:03:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-11 20:03:56,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:03:56,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268621289] [2024-11-11 20:03:56,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268621289] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:03:56,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556118249] [2024-11-11 20:03:56,476 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:03:56,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:03:56,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:03:56,477 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) [2024-11-11 20:03:56,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-11 20:03:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:56,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-11 20:03:56,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:03:56,583 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-11 20:03:56,583 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:03:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-11 20:03:56,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556118249] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:03:56,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:03:56,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2024-11-11 20:03:56,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281064264] [2024-11-11 20:03:56,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:03:56,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-11 20:03:56,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:03:56,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-11 20:03:56,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-11 20:03:56,649 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2024-11-11 20:03:56,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:03:56,772 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2024-11-11 20:03:56,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-11 20:03:56,773 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 56 [2024-11-11 20:03:56,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:03:56,774 INFO L225 Difference]: With dead ends: 211 [2024-11-11 20:03:56,774 INFO L226 Difference]: Without dead ends: 203 [2024-11-11 20:03:56,775 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2024-11-11 20:03:56,775 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 65 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 20:03:56,775 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 186 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 20:03:56,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-11 20:03:56,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2024-11-11 20:03:56,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 125 states have (on average 1.192) internal successors, (149), 129 states have internal predecessors, (149), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-11 20:03:56,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 233 transitions. [2024-11-11 20:03:56,811 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 233 transitions. Word has length 56 [2024-11-11 20:03:56,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:03:56,811 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 233 transitions. [2024-11-11 20:03:56,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2024-11-11 20:03:56,811 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 233 transitions. [2024-11-11 20:03:56,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-11 20:03:56,812 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:03:56,812 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:03:56,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-11 20:03:57,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:03:57,013 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:03:57,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:03:57,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1506412172, now seen corresponding path program 1 times [2024-11-11 20:03:57,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:03:57,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703993631] [2024-11-11 20:03:57,014 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:03:57,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:03:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:57,111 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 20:03:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:57,127 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 20:03:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:57,129 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-11 20:03:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:57,131 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-11 20:03:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:57,133 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-11 20:03:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:57,135 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-11 20:03:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:57,137 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-11 20:03:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:57,139 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-11 20:03:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-11 20:03:57,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:03:57,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703993631] [2024-11-11 20:03:57,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703993631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:03:57,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886090608] [2024-11-11 20:03:57,142 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:03:57,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:03:57,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:03:57,144 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) [2024-11-11 20:03:57,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-11 20:03:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:57,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-11 20:03:57,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:03:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-11 20:03:57,213 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:03:57,280 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-11 20:03:57,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886090608] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:03:57,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:03:57,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-11-11 20:03:57,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793292192] [2024-11-11 20:03:57,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:03:57,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-11 20:03:57,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:03:57,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-11 20:03:57,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-11 20:03:57,283 INFO L87 Difference]: Start difference. First operand 195 states and 233 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-11 20:03:57,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:03:57,433 INFO L93 Difference]: Finished difference Result 279 states and 364 transitions. [2024-11-11 20:03:57,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-11 20:03:57,433 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 57 [2024-11-11 20:03:57,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:03:57,435 INFO L225 Difference]: With dead ends: 279 [2024-11-11 20:03:57,435 INFO L226 Difference]: Without dead ends: 259 [2024-11-11 20:03:57,435 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2024-11-11 20:03:57,436 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 60 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 20:03:57,436 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 249 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 20:03:57,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-11-11 20:03:57,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2024-11-11 20:03:57,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.2236842105263157) internal successors, (186), 155 states have internal predecessors, (186), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2024-11-11 20:03:57,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 299 transitions. [2024-11-11 20:03:57,463 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 299 transitions. Word has length 57 [2024-11-11 20:03:57,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:03:57,464 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 299 transitions. [2024-11-11 20:03:57,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-11 20:03:57,464 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 299 transitions. [2024-11-11 20:03:57,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-11 20:03:57,465 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:03:57,465 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:03:57,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-11 20:03:57,665 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 [2024-11-11 20:03:57,666 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:03:57,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:03:57,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1869160295, now seen corresponding path program 1 times [2024-11-11 20:03:57,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:03:57,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391801166] [2024-11-11 20:03:57,667 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:03:57,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:03:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:57,730 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 20:03:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:57,733 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 20:03:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:57,735 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-11 20:03:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:57,737 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-11 20:03:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:57,739 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-11 20:03:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:57,741 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-11 20:03:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:57,743 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-11 20:03:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:57,746 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-11 20:03:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-11 20:03:57,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:03:57,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391801166] [2024-11-11 20:03:57,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391801166] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:03:57,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251283675] [2024-11-11 20:03:57,749 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:03:57,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:03:57,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:03:57,750 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) [2024-11-11 20:03:57,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-11 20:03:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:57,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-11 20:03:57,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:03:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-11 20:03:57,844 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:03:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-11 20:03:57,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251283675] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:03:57,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:03:57,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2024-11-11 20:03:57,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878701028] [2024-11-11 20:03:57,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:03:57,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-11 20:03:57,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:03:57,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-11 20:03:57,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-11 20:03:57,905 INFO L87 Difference]: Start difference. First operand 235 states and 299 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2024-11-11 20:03:58,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:03:58,053 INFO L93 Difference]: Finished difference Result 344 states and 448 transitions. [2024-11-11 20:03:58,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-11 20:03:58,053 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 59 [2024-11-11 20:03:58,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:03:58,057 INFO L225 Difference]: With dead ends: 344 [2024-11-11 20:03:58,057 INFO L226 Difference]: Without dead ends: 248 [2024-11-11 20:03:58,058 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2024-11-11 20:03:58,059 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 70 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 20:03:58,060 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 183 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 20:03:58,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-11-11 20:03:58,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2024-11-11 20:03:58,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 161 states have (on average 1.173913043478261) internal successors, (189), 164 states have internal predecessors, (189), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2024-11-11 20:03:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 302 transitions. [2024-11-11 20:03:58,086 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 302 transitions. Word has length 59 [2024-11-11 20:03:58,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:03:58,086 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 302 transitions. [2024-11-11 20:03:58,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2024-11-11 20:03:58,087 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 302 transitions. [2024-11-11 20:03:58,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-11 20:03:58,088 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:03:58,088 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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, 1, 1, 1] [2024-11-11 20:03:58,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-11 20:03:58,289 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 [2024-11-11 20:03:58,290 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:03:58,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:03:58,290 INFO L85 PathProgramCache]: Analyzing trace with hash 991223133, now seen corresponding path program 1 times [2024-11-11 20:03:58,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:03:58,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568344072] [2024-11-11 20:03:58,290 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:03:58,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:03:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:03:58,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346648819] [2024-11-11 20:03:58,307 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:03:58,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:03:58,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:03:58,309 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) [2024-11-11 20:03:58,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-11 20:03:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:03:58,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-11 20:03:58,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:03:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-11 20:03:58,477 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:03:58,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:03:58,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568344072] [2024-11-11 20:03:58,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:03:58,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346648819] [2024-11-11 20:03:58,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346648819] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:03:58,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-11 20:03:58,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2024-11-11 20:03:58,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349407324] [2024-11-11 20:03:58,522 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-11 20:03:58,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-11 20:03:58,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:03:58,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-11 20:03:58,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-11 20:03:58,523 INFO L87 Difference]: Start difference. First operand 244 states and 302 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-11 20:03:58,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:03:58,608 INFO L93 Difference]: Finished difference Result 283 states and 355 transitions. [2024-11-11 20:03:58,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-11 20:03:58,609 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2024-11-11 20:03:58,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:03:58,610 INFO L225 Difference]: With dead ends: 283 [2024-11-11 20:03:58,610 INFO L226 Difference]: Without dead ends: 278 [2024-11-11 20:03:58,610 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-11 20:03:58,611 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 10 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 20:03:58,611 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 213 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 20:03:58,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2024-11-11 20:03:58,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 276. [2024-11-11 20:03:58,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 183 states have (on average 1.185792349726776) internal successors, (217), 187 states have internal predecessors, (217), 65 states have call successors, (65), 27 states have call predecessors, (65), 27 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2024-11-11 20:03:58,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 343 transitions. [2024-11-11 20:03:58,636 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 343 transitions. Word has length 64 [2024-11-11 20:03:58,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:03:58,637 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 343 transitions. [2024-11-11 20:03:58,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-11 20:03:58,637 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 343 transitions. [2024-11-11 20:03:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-11 20:03:58,637 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:03:58,637 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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, 1, 1, 1] [2024-11-11 20:03:58,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-11 20:03:58,841 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 [2024-11-11 20:03:58,842 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:03:58,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:03:58,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1694315171, now seen corresponding path program 2 times [2024-11-11 20:03:58,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:03:58,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259590291] [2024-11-11 20:03:58,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:03:58,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:03:58,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:03:58,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104771502] [2024-11-11 20:03:58,860 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 20:03:58,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:03:58,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:03:58,862 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) [2024-11-11 20:03:58,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-11 20:03:58,909 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 20:03:58,909 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 20:03:58,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-11 20:03:58,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:03:59,221 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-11 20:03:59,222 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:03:59,363 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-11 20:03:59,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:03:59,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259590291] [2024-11-11 20:03:59,363 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:03:59,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104771502] [2024-11-11 20:03:59,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104771502] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:03:59,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 20:03:59,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2024-11-11 20:03:59,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906245554] [2024-11-11 20:03:59,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 20:03:59,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-11 20:03:59,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:03:59,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-11 20:03:59,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-11-11 20:03:59,364 INFO L87 Difference]: Start difference. First operand 276 states and 343 transitions. Second operand has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-11 20:03:59,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:03:59,782 INFO L93 Difference]: Finished difference Result 294 states and 361 transitions. [2024-11-11 20:03:59,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-11 20:03:59,785 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) Word has length 69 [2024-11-11 20:03:59,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:03:59,786 INFO L225 Difference]: With dead ends: 294 [2024-11-11 20:03:59,786 INFO L226 Difference]: Without dead ends: 290 [2024-11-11 20:03:59,787 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2024-11-11 20:03:59,787 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 60 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 20:03:59,787 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 330 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 20:03:59,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2024-11-11 20:03:59,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 286. [2024-11-11 20:03:59,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 192 states have (on average 1.1770833333333333) internal successors, (226), 195 states have internal predecessors, (226), 63 states have call successors, (63), 30 states have call predecessors, (63), 30 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2024-11-11 20:03:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 349 transitions. [2024-11-11 20:03:59,838 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 349 transitions. Word has length 69 [2024-11-11 20:03:59,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:03:59,838 INFO L471 AbstractCegarLoop]: Abstraction has 286 states and 349 transitions. [2024-11-11 20:03:59,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-11 20:03:59,838 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 349 transitions. [2024-11-11 20:03:59,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-11 20:03:59,841 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:03:59,841 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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, 1] [2024-11-11 20:03:59,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-11 20:04:00,045 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 [2024-11-11 20:04:00,046 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:04:00,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:04:00,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1349365539, now seen corresponding path program 3 times [2024-11-11 20:04:00,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:04:00,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604225686] [2024-11-11 20:04:00,046 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:04:00,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:04:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:04:00,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515229248] [2024-11-11 20:04:00,059 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 20:04:00,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:04:00,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:04:00,060 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) [2024-11-11 20:04:00,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-11 20:04:00,114 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-11 20:04:00,114 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 20:04:00,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-11 20:04:00,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:04:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 42 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-11 20:04:00,959 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:04:13,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:04:13,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604225686] [2024-11-11 20:04:13,071 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:04:13,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515229248] [2024-11-11 20:04:13,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515229248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:04:13,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-11 20:04:13,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-11 20:04:13,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205868609] [2024-11-11 20:04:13,072 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-11 20:04:13,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-11 20:04:13,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:04:13,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-11 20:04:13,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=535, Unknown=1, NotChecked=0, Total=650 [2024-11-11 20:04:13,073 INFO L87 Difference]: Start difference. First operand 286 states and 349 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-11 20:04:13,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:04:13,631 INFO L93 Difference]: Finished difference Result 309 states and 369 transitions. [2024-11-11 20:04:13,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-11 20:04:13,632 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 74 [2024-11-11 20:04:13,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:04:13,633 INFO L225 Difference]: With dead ends: 309 [2024-11-11 20:04:13,633 INFO L226 Difference]: Without dead ends: 305 [2024-11-11 20:04:13,633 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=167, Invalid=702, Unknown=1, NotChecked=0, Total=870 [2024-11-11 20:04:13,634 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 37 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-11 20:04:13,634 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 294 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-11 20:04:13,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-11-11 20:04:13,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 304. [2024-11-11 20:04:13,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 206 states have (on average 1.1601941747572815) internal successors, (239), 208 states have internal predecessors, (239), 63 states have call successors, (63), 35 states have call predecessors, (63), 34 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2024-11-11 20:04:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 362 transitions. [2024-11-11 20:04:13,665 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 362 transitions. Word has length 74 [2024-11-11 20:04:13,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:04:13,665 INFO L471 AbstractCegarLoop]: Abstraction has 304 states and 362 transitions. [2024-11-11 20:04:13,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-11 20:04:13,665 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 362 transitions. [2024-11-11 20:04:13,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-11 20:04:13,666 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:04:13,666 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1, 1, 1, 1] [2024-11-11 20:04:13,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-11 20:04:13,869 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,SelfDestructingSolverStorable13 [2024-11-11 20:04:13,870 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:04:13,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:04:13,870 INFO L85 PathProgramCache]: Analyzing trace with hash -484140586, now seen corresponding path program 1 times [2024-11-11 20:04:13,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:04:13,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130427022] [2024-11-11 20:04:13,871 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:04:13,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:04:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:04:13,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025701892] [2024-11-11 20:04:13,891 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:04:13,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:04:13,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:04:13,893 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) [2024-11-11 20:04:13,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-11 20:04:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:13,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-11 20:04:13,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:04:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-11-11 20:04:14,362 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:04:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-11 20:04:15,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:04:15,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130427022] [2024-11-11 20:04:15,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:04:15,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025701892] [2024-11-11 20:04:15,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025701892] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:04:15,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 20:04:15,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-11-11 20:04:15,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277556369] [2024-11-11 20:04:15,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 20:04:15,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-11 20:04:15,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:04:15,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-11 20:04:15,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-11 20:04:15,096 INFO L87 Difference]: Start difference. First operand 304 states and 362 transitions. Second operand has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 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) [2024-11-11 20:04:17,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:04:17,828 INFO L93 Difference]: Finished difference Result 440 states and 579 transitions. [2024-11-11 20:04:17,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-11 20:04:17,828 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 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 80 [2024-11-11 20:04:17,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:04:17,832 INFO L225 Difference]: With dead ends: 440 [2024-11-11 20:04:17,832 INFO L226 Difference]: Without dead ends: 425 [2024-11-11 20:04:17,833 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2024-11-11 20:04:17,833 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 136 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-11 20:04:17,833 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 634 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-11 20:04:17,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2024-11-11 20:04:17,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 392. [2024-11-11 20:04:17,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 259 states have (on average 1.22007722007722) internal successors, (316), 260 states have internal predecessors, (316), 97 states have call successors, (97), 35 states have call predecessors, (97), 35 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2024-11-11 20:04:17,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 509 transitions. [2024-11-11 20:04:17,901 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 509 transitions. Word has length 80 [2024-11-11 20:04:17,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:04:17,901 INFO L471 AbstractCegarLoop]: Abstraction has 392 states and 509 transitions. [2024-11-11 20:04:17,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 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) [2024-11-11 20:04:17,901 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 509 transitions. [2024-11-11 20:04:17,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-11 20:04:17,902 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:04:17,902 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:04:17,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-11 20:04:18,106 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,SelfDestructingSolverStorable14 [2024-11-11 20:04:18,106 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:04:18,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:04:18,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1718599493, now seen corresponding path program 1 times [2024-11-11 20:04:18,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:04:18,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79523044] [2024-11-11 20:04:18,107 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:04:18,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:04:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:04:18,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579280573] [2024-11-11 20:04:18,124 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:04:18,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:04:18,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:04:18,125 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) [2024-11-11 20:04:18,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-11 20:04:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:18,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-11 20:04:18,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:04:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2024-11-11 20:04:19,181 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:04:19,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:04:19,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79523044] [2024-11-11 20:04:19,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:04:19,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579280573] [2024-11-11 20:04:19,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579280573] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:04:19,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-11 20:04:19,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-11 20:04:19,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961827310] [2024-11-11 20:04:19,376 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-11 20:04:19,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-11 20:04:19,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:04:19,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-11 20:04:19,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-11 20:04:19,377 INFO L87 Difference]: Start difference. First operand 392 states and 509 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-11-11 20:04:20,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:04:20,144 INFO L93 Difference]: Finished difference Result 401 states and 517 transitions. [2024-11-11 20:04:20,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-11 20:04:20,145 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 97 [2024-11-11 20:04:20,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:04:20,149 INFO L225 Difference]: With dead ends: 401 [2024-11-11 20:04:20,149 INFO L226 Difference]: Without dead ends: 399 [2024-11-11 20:04:20,150 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-11-11 20:04:20,153 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 42 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-11 20:04:20,153 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 323 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-11 20:04:20,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2024-11-11 20:04:20,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 396. [2024-11-11 20:04:20,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 262 states have (on average 1.213740458015267) internal successors, (318), 263 states have internal predecessors, (318), 97 states have call successors, (97), 36 states have call predecessors, (97), 36 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2024-11-11 20:04:20,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 511 transitions. [2024-11-11 20:04:20,222 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 511 transitions. Word has length 97 [2024-11-11 20:04:20,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:04:20,222 INFO L471 AbstractCegarLoop]: Abstraction has 396 states and 511 transitions. [2024-11-11 20:04:20,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-11-11 20:04:20,223 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 511 transitions. [2024-11-11 20:04:20,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-11 20:04:20,224 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:04:20,224 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:04:20,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-11 20:04:20,425 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,SelfDestructingSolverStorable15 [2024-11-11 20:04:20,425 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:04:20,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:04:20,426 INFO L85 PathProgramCache]: Analyzing trace with hash 160443165, now seen corresponding path program 4 times [2024-11-11 20:04:20,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:04:20,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472172385] [2024-11-11 20:04:20,426 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:04:20,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:04:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,495 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 20:04:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,497 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 20:04:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,500 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-11 20:04:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,501 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-11 20:04:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,503 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-11 20:04:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,505 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-11 20:04:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,509 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-11 20:04:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,511 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-11 20:04:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,513 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-11-11 20:04:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,518 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-11 20:04:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,521 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-11 20:04:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,524 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-11-11 20:04:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,527 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-11-11 20:04:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,530 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-11-11 20:04:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,532 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-11-11 20:04:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-11-11 20:04:20,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:04:20,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472172385] [2024-11-11 20:04:20,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472172385] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:04:20,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:04:20,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-11 20:04:20,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974691471] [2024-11-11 20:04:20,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:04:20,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 20:04:20,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:04:20,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 20:04:20,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-11 20:04:20,537 INFO L87 Difference]: Start difference. First operand 396 states and 511 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-11 20:04:20,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:04:20,684 INFO L93 Difference]: Finished difference Result 588 states and 820 transitions. [2024-11-11 20:04:20,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-11 20:04:20,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 101 [2024-11-11 20:04:20,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:04:20,687 INFO L225 Difference]: With dead ends: 588 [2024-11-11 20:04:20,687 INFO L226 Difference]: Without dead ends: 465 [2024-11-11 20:04:20,687 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-11 20:04:20,688 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 12 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:04:20,688 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 174 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:04:20,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2024-11-11 20:04:20,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 415. [2024-11-11 20:04:20,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 273 states have (on average 1.2234432234432235) internal successors, (334), 274 states have internal predecessors, (334), 105 states have call successors, (105), 36 states have call predecessors, (105), 36 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2024-11-11 20:04:20,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 543 transitions. [2024-11-11 20:04:20,777 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 543 transitions. Word has length 101 [2024-11-11 20:04:20,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:04:20,777 INFO L471 AbstractCegarLoop]: Abstraction has 415 states and 543 transitions. [2024-11-11 20:04:20,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-11 20:04:20,778 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 543 transitions. [2024-11-11 20:04:20,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-11 20:04:20,779 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:04:20,779 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:04:20,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-11 20:04:20,780 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:04:20,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:04:20,780 INFO L85 PathProgramCache]: Analyzing trace with hash -245423741, now seen corresponding path program 1 times [2024-11-11 20:04:20,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:04:20,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811370004] [2024-11-11 20:04:20,780 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:04:20,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:04:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,951 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 20:04:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,953 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 20:04:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,956 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-11 20:04:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,958 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-11 20:04:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,961 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-11 20:04:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,963 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-11 20:04:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,967 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-11 20:04:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,970 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-11 20:04:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,973 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-11-11 20:04:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,980 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-11 20:04:20,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,982 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-11 20:04:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,986 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-11-11 20:04:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,990 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-11-11 20:04:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,994 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-11-11 20:04:20,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:20,997 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-11-11 20:04:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:21,001 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-11-11 20:04:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-11 20:04:21,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:04:21,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811370004] [2024-11-11 20:04:21,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811370004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:04:21,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572515976] [2024-11-11 20:04:21,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:04:21,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:04:21,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:04:21,008 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) [2024-11-11 20:04:21,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-11 20:04:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:04:21,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-11 20:04:21,073 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:04:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-11-11 20:04:21,176 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:04:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-11 20:04:21,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572515976] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:04:21,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:04:21,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2024-11-11 20:04:21,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185604359] [2024-11-11 20:04:21,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:04:21,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-11 20:04:21,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:04:21,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-11 20:04:21,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2024-11-11 20:04:21,331 INFO L87 Difference]: Start difference. First operand 415 states and 543 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (49), 6 states have call predecessors, (49), 5 states have return successors, (48), 8 states have call predecessors, (48), 8 states have call successors, (48) [2024-11-11 20:04:21,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:04:21,950 INFO L93 Difference]: Finished difference Result 1524 states and 2068 transitions. [2024-11-11 20:04:21,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-11 20:04:21,951 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (49), 6 states have call predecessors, (49), 5 states have return successors, (48), 8 states have call predecessors, (48), 8 states have call successors, (48) Word has length 112 [2024-11-11 20:04:21,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:04:21,956 INFO L225 Difference]: With dead ends: 1524 [2024-11-11 20:04:21,957 INFO L226 Difference]: Without dead ends: 1367 [2024-11-11 20:04:21,958 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2024-11-11 20:04:21,958 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 222 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 20:04:21,959 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 249 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 20:04:21,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2024-11-11 20:04:22,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1305. [2024-11-11 20:04:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 820 states have (on average 1.1841463414634146) internal successors, (971), 828 states have internal predecessors, (971), 360 states have call successors, (360), 124 states have call predecessors, (360), 124 states have return successors, (352), 352 states have call predecessors, (352), 352 states have call successors, (352) [2024-11-11 20:04:22,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 1683 transitions. [2024-11-11 20:04:22,240 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 1683 transitions. Word has length 112 [2024-11-11 20:04:22,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:04:22,240 INFO L471 AbstractCegarLoop]: Abstraction has 1305 states and 1683 transitions. [2024-11-11 20:04:22,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (49), 6 states have call predecessors, (49), 5 states have return successors, (48), 8 states have call predecessors, (48), 8 states have call successors, (48) [2024-11-11 20:04:22,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 1683 transitions. [2024-11-11 20:04:22,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-11-11 20:04:22,241 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:04:22,242 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:04:22,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-11 20:04:22,445 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 [2024-11-11 20:04:22,446 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:04:22,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:04:22,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1062250723, now seen corresponding path program 2 times [2024-11-11 20:04:22,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:04:22,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658112988] [2024-11-11 20:04:22,446 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:04:22,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:04:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:04:22,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455629165] [2024-11-11 20:04:22,471 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 20:04:22,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:04:22,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:04:22,472 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) [2024-11-11 20:04:22,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-11 20:04:22,552 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 20:04:22,552 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 20:04:22,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-11 20:04:22,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:04:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 103 proven. 56 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-11-11 20:04:23,360 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:04:34,630 WARN L286 SmtUtils]: Spent 8.45s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-11 20:04:34,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:04:34,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658112988] [2024-11-11 20:04:34,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:04:34,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455629165] [2024-11-11 20:04:34,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455629165] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:04:34,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-11 20:04:34,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-11-11 20:04:34,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006524783] [2024-11-11 20:04:34,631 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-11 20:04:34,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-11 20:04:34,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:04:34,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-11 20:04:34,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2024-11-11 20:04:34,632 INFO L87 Difference]: Start difference. First operand 1305 states and 1683 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 14 states have internal predecessors, (36), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2024-11-11 20:04:35,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:04:35,457 INFO L93 Difference]: Finished difference Result 1426 states and 1825 transitions. [2024-11-11 20:04:35,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-11 20:04:35,457 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 14 states have internal predecessors, (36), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 120 [2024-11-11 20:04:35,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:04:35,462 INFO L225 Difference]: With dead ends: 1426 [2024-11-11 20:04:35,462 INFO L226 Difference]: Without dead ends: 1424 [2024-11-11 20:04:35,463 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2024-11-11 20:04:35,463 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 45 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-11 20:04:35,463 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 486 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-11 20:04:35,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2024-11-11 20:04:35,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1310. [2024-11-11 20:04:35,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 826 states have (on average 1.1803874092009685) internal successors, (975), 834 states have internal predecessors, (975), 356 states have call successors, (356), 127 states have call predecessors, (356), 127 states have return successors, (348), 348 states have call predecessors, (348), 348 states have call successors, (348) [2024-11-11 20:04:35,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1679 transitions. [2024-11-11 20:04:35,719 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1679 transitions. Word has length 120 [2024-11-11 20:04:35,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:04:35,720 INFO L471 AbstractCegarLoop]: Abstraction has 1310 states and 1679 transitions. [2024-11-11 20:04:35,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 14 states have internal predecessors, (36), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2024-11-11 20:04:35,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1679 transitions. [2024-11-11 20:04:35,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-11 20:04:35,721 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:04:35,721 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:04:35,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-11 20:04:35,921 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 [2024-11-11 20:04:35,922 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:04:35,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:04:35,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1493115269, now seen corresponding path program 3 times [2024-11-11 20:04:35,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:04:35,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508094600] [2024-11-11 20:04:35,922 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:04:35,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:04:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:04:35,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501696665] [2024-11-11 20:04:35,943 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 20:04:35,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:04:35,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:04:35,945 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) [2024-11-11 20:04:35,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-11 20:04:36,034 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-11 20:04:36,034 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 20:04:36,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-11 20:04:36,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:04:37,005 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 100 proven. 57 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-11-11 20:04:37,006 INFO L312 TraceCheckSpWp]: Computing backward predicates...