./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-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-dev-4a390ef-m [2024-10-24 00:10:20,106 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 00:10:20,182 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 00:10:20,186 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 00:10:20,187 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 00:10:20,212 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 00:10:20,213 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 00:10:20,213 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 00:10:20,214 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 00:10:20,215 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 00:10:20,215 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 00:10:20,215 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 00:10:20,216 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 00:10:20,216 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 00:10:20,218 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 00:10:20,218 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 00:10:20,218 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 00:10:20,219 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 00:10:20,219 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 00:10:20,219 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 00:10:20,219 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 00:10:20,223 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 00:10:20,223 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 00:10:20,223 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 00:10:20,223 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 00:10:20,224 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 00:10:20,224 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 00:10:20,224 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 00:10:20,224 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 00:10:20,225 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 00:10:20,225 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 00:10:20,225 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 00:10:20,225 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 00:10:20,226 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 00:10:20,226 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 00:10:20,226 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 00:10:20,227 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 00:10:20,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 00:10:20,227 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 00:10:20,227 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 00:10:20,227 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 00:10:20,228 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 00:10:20,228 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30672bd579b7f25ffa685cb80d8a419cb542781c19afe0226ba5d9d3cf26984c [2024-10-24 00:10:20,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 00:10:20,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 00:10:20,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 00:10:20,502 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 00:10:20,503 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 00:10:20,504 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2024-10-24 00:10:21,990 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 00:10:22,165 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 00:10:22,166 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2024-10-24 00:10:22,176 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8d2fec73/43148a13aefe4c87a75804c7b1719da0/FLAG831ea063a [2024-10-24 00:10:22,190 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8d2fec73/43148a13aefe4c87a75804c7b1719da0 [2024-10-24 00:10:22,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 00:10:22,193 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 00:10:22,195 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 00:10:22,195 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 00:10:22,200 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 00:10:22,201 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:10:22" (1/1) ... [2024-10-24 00:10:22,202 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50fa4055 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:22, skipping insertion in model container [2024-10-24 00:10:22,202 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:10:22" (1/1) ... [2024-10-24 00:10:22,228 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 00:10:22,404 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2024-10-24 00:10:22,426 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 00:10:22,448 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 00:10:22,461 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2024-10-24 00:10:22,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 00:10:22,509 INFO L204 MainTranslator]: Completed translation [2024-10-24 00:10:22,510 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:22 WrapperNode [2024-10-24 00:10:22,510 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 00:10:22,511 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 00:10:22,511 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 00:10:22,512 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 00:10:22,518 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:22" (1/1) ... [2024-10-24 00:10:22,524 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:22" (1/1) ... [2024-10-24 00:10:22,542 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 86 [2024-10-24 00:10:22,543 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 00:10:22,543 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 00:10:22,544 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 00:10:22,544 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 00:10:22,554 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:22" (1/1) ... [2024-10-24 00:10:22,554 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:22" (1/1) ... [2024-10-24 00:10:22,555 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:22" (1/1) ... [2024-10-24 00:10:22,566 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-24 00:10:22,566 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:22" (1/1) ... [2024-10-24 00:10:22,567 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:22" (1/1) ... [2024-10-24 00:10:22,573 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:22" (1/1) ... [2024-10-24 00:10:22,576 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:22" (1/1) ... [2024-10-24 00:10:22,577 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:22" (1/1) ... [2024-10-24 00:10:22,578 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:22" (1/1) ... [2024-10-24 00:10:22,579 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 00:10:22,581 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 00:10:22,581 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 00:10:22,581 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 00:10:22,582 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:22" (1/1) ... [2024-10-24 00:10:22,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 00:10:22,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:22,619 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 00:10:22,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 00:10:22,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 00:10:22,672 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-24 00:10:22,674 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-24 00:10:22,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 00:10:22,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 00:10:22,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 00:10:22,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-24 00:10:22,676 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-24 00:10:22,752 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 00:10:22,754 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 00:10:22,974 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-24 00:10:22,975 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 00:10:23,004 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 00:10:23,005 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-24 00:10:23,005 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:10:23 BoogieIcfgContainer [2024-10-24 00:10:23,005 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 00:10:23,008 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 00:10:23,008 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 00:10:23,012 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 00:10:23,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:10:22" (1/3) ... [2024-10-24 00:10:23,013 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18cc50b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:10:23, skipping insertion in model container [2024-10-24 00:10:23,014 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:22" (2/3) ... [2024-10-24 00:10:23,014 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18cc50b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:10:23, skipping insertion in model container [2024-10-24 00:10:23,014 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:10:23" (3/3) ... [2024-10-24 00:10:23,016 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound100.c [2024-10-24 00:10:23,031 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 00:10:23,032 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 00:10:23,095 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 00:10:23,101 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;@751c669e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 00:10:23,101 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-24 00:10:23,106 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 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) [2024-10-24 00:10:23,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-24 00:10:23,113 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:23,114 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:10:23,115 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:23,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:23,120 INFO L85 PathProgramCache]: Analyzing trace with hash -689848145, now seen corresponding path program 1 times [2024-10-24 00:10:23,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:23,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333535620] [2024-10-24 00:10:23,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:23,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:23,268 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:10:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:23,275 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:10:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:23,280 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:10:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:23,285 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:10:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-24 00:10:23,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:23,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333535620] [2024-10-24 00:10:23,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333535620] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:10:23,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:10:23,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 00:10:23,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705606911] [2024-10-24 00:10:23,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:10:23,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-24 00:10:23,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:23,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-24 00:10:23,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 00:10:23,324 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2024-10-24 00:10:23,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:23,364 INFO L93 Difference]: Finished difference Result 60 states and 99 transitions. [2024-10-24 00:10:23,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-24 00:10:23,366 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (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 27 [2024-10-24 00:10:23,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:23,373 INFO L225 Difference]: With dead ends: 60 [2024-10-24 00:10:23,373 INFO L226 Difference]: Without dead ends: 29 [2024-10-24 00:10:23,376 INFO L431 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 [2024-10-24 00:10:23,379 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:23,380 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:10:23,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-24 00:10:23,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-10-24 00:10:23,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 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) [2024-10-24 00:10:23,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2024-10-24 00:10:23,412 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 27 [2024-10-24 00:10:23,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:23,412 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2024-10-24 00:10:23,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (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) [2024-10-24 00:10:23,413 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2024-10-24 00:10:23,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-24 00:10:23,414 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:23,415 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:10:23,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 00:10:23,415 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:23,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:23,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1989097615, now seen corresponding path program 1 times [2024-10-24 00:10:23,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:23,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446607456] [2024-10-24 00:10:23,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:23,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:23,596 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:10:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:23,606 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:10:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:23,614 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:10:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:23,621 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:10:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-24 00:10:23,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:23,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446607456] [2024-10-24 00:10:23,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446607456] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:10:23,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:10:23,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 00:10:23,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367769530] [2024-10-24 00:10:23,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:10:23,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 00:10:23,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:23,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 00:10:23,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 00:10:23,635 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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), 1 states have call successors, (4) [2024-10-24 00:10:23,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:23,664 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2024-10-24 00:10:23,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 00:10:23,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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), 1 states have call successors, (4) Word has length 28 [2024-10-24 00:10:23,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:23,666 INFO L225 Difference]: With dead ends: 39 [2024-10-24 00:10:23,666 INFO L226 Difference]: Without dead ends: 31 [2024-10-24 00:10:23,666 INFO L431 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 [2024-10-24 00:10:23,667 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:23,668 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 97 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:10:23,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-24 00:10:23,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-10-24 00:10:23,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 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) [2024-10-24 00:10:23,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2024-10-24 00:10:23,683 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 28 [2024-10-24 00:10:23,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:23,684 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2024-10-24 00:10:23,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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), 1 states have call successors, (4) [2024-10-24 00:10:23,685 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2024-10-24 00:10:23,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-24 00:10:23,687 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:23,687 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:10:23,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 00:10:23,688 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:23,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:23,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1539070609, now seen corresponding path program 1 times [2024-10-24 00:10:23,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:23,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817712007] [2024-10-24 00:10:23,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:23,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:23,854 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:10:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:23,862 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:10:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:23,933 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:10:23,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:23,946 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:10:23,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-24 00:10:23,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:23,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817712007] [2024-10-24 00:10:23,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817712007] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:10:23,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353810905] [2024-10-24 00:10:23,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:23,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:23,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:23,962 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:23,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 00:10:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:24,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 00:10:24,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:10:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-24 00:10:24,214 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 00:10:24,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353810905] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:10:24,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:10:24,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-10-24 00:10:24,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419643452] [2024-10-24 00:10:24,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:10:24,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 00:10:24,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:24,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 00:10:24,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-24 00:10:24,217 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2024-10-24 00:10:24,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:24,325 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2024-10-24 00:10:24,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 00:10:24,326 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 29 [2024-10-24 00:10:24,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:24,327 INFO L225 Difference]: With dead ends: 48 [2024-10-24 00:10:24,327 INFO L226 Difference]: Without dead ends: 46 [2024-10-24 00:10:24,328 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-10-24 00:10:24,329 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 9 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:24,330 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 138 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:10:24,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-24 00:10:24,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2024-10-24 00:10:24,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 25 states have (on average 1.32) internal successors, (33), 27 states have internal predecessors, (33), 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) [2024-10-24 00:10:24,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 62 transitions. [2024-10-24 00:10:24,341 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 62 transitions. Word has length 29 [2024-10-24 00:10:24,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:24,342 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 62 transitions. [2024-10-24 00:10:24,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2024-10-24 00:10:24,342 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 62 transitions. [2024-10-24 00:10:24,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-24 00:10:24,343 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:24,344 INFO L215 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] [2024-10-24 00:10:24,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 00:10:24,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:24,548 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:24,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:24,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1634889762, now seen corresponding path program 1 times [2024-10-24 00:10:24,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:24,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645319212] [2024-10-24 00:10:24,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:24,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:10:24,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143046702] [2024-10-24 00:10:24,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:24,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:24,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:24,575 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:24,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 00:10:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:24,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 00:10:24,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:10:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-24 00:10:24,694 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 00:10:24,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:24,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645319212] [2024-10-24 00:10:24,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:10:24,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143046702] [2024-10-24 00:10:24,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143046702] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:10:24,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:10:24,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 00:10:24,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074730256] [2024-10-24 00:10:24,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:10:24,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:10:24,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:24,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:10:24,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 00:10:24,704 INFO L87 Difference]: Start difference. First operand 44 states and 62 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (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) [2024-10-24 00:10:24,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:24,770 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2024-10-24 00:10:24,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 00:10:24,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (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 31 [2024-10-24 00:10:24,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:24,774 INFO L225 Difference]: With dead ends: 65 [2024-10-24 00:10:24,774 INFO L226 Difference]: Without dead ends: 63 [2024-10-24 00:10:24,774 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:10:24,775 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:24,776 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:10:24,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-10-24 00:10:24,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2024-10-24 00:10:24,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.3125) internal successors, (42), 36 states have internal predecessors, (42), 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) [2024-10-24 00:10:24,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 75 transitions. [2024-10-24 00:10:24,794 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 75 transitions. Word has length 31 [2024-10-24 00:10:24,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:24,795 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 75 transitions. [2024-10-24 00:10:24,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (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) [2024-10-24 00:10:24,795 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 75 transitions. [2024-10-24 00:10:24,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-24 00:10:24,796 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:24,796 INFO L215 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] [2024-10-24 00:10:24,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 00:10:25,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-24 00:10:25,001 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:25,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:25,002 INFO L85 PathProgramCache]: Analyzing trace with hash -254153455, now seen corresponding path program 1 times [2024-10-24 00:10:25,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:25,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247065172] [2024-10-24 00:10:25,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:25,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:25,086 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:10:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:25,089 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:10:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:25,112 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:10:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:25,116 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:10:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:25,120 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-24 00:10:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-24 00:10:25,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:25,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247065172] [2024-10-24 00:10:25,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247065172] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:10:25,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771408463] [2024-10-24 00:10:25,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:25,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:25,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:25,126 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:25,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 00:10:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:25,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 00:10:25,184 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:10:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-24 00:10:25,297 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 00:10:25,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771408463] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:10:25,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:10:25,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-10-24 00:10:25,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158065299] [2024-10-24 00:10:25,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:10:25,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:10:25,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:25,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:10:25,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-24 00:10:25,299 INFO L87 Difference]: Start difference. First operand 54 states and 75 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-24 00:10:25,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:25,356 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2024-10-24 00:10:25,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 00:10:25,356 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, (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 34 [2024-10-24 00:10:25,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:25,358 INFO L225 Difference]: With dead ends: 62 [2024-10-24 00:10:25,358 INFO L226 Difference]: Without dead ends: 58 [2024-10-24 00:10:25,358 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-10-24 00:10:25,359 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:25,359 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 135 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:10:25,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-24 00:10:25,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2024-10-24 00:10:25,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 38 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) [2024-10-24 00:10:25,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2024-10-24 00:10:25,376 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 34 [2024-10-24 00:10:25,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:25,378 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2024-10-24 00:10:25,378 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-24 00:10:25,378 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2024-10-24 00:10:25,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-24 00:10:25,379 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:25,379 INFO L215 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] [2024-10-24 00:10:25,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 00:10:25,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:25,584 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:25,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:25,584 INFO L85 PathProgramCache]: Analyzing trace with hash 753217482, now seen corresponding path program 1 times [2024-10-24 00:10:25,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:25,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39284520] [2024-10-24 00:10:25,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:25,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:25,735 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:10:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:25,741 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:10:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:25,745 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:10:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:25,751 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:10:25,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-24 00:10:25,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:25,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39284520] [2024-10-24 00:10:25,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39284520] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:10:25,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:10:25,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 00:10:25,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103628510] [2024-10-24 00:10:25,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:10:25,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 00:10:25,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:25,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 00:10:25,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:10:25,764 INFO L87 Difference]: Start difference. First operand 57 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2024-10-24 00:10:25,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:25,811 INFO L93 Difference]: Finished difference Result 83 states and 110 transitions. [2024-10-24 00:10:25,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 00:10:25,811 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 34 [2024-10-24 00:10:25,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:25,812 INFO L225 Difference]: With dead ends: 83 [2024-10-24 00:10:25,812 INFO L226 Difference]: Without dead ends: 57 [2024-10-24 00:10:25,813 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:10:25,814 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 10 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:25,814 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 120 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:10:25,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-24 00:10:25,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-10-24 00:10:25,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 38 states have internal predecessors, (43), 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) [2024-10-24 00:10:25,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2024-10-24 00:10:25,832 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 34 [2024-10-24 00:10:25,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:25,833 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2024-10-24 00:10:25,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2024-10-24 00:10:25,833 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2024-10-24 00:10:25,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-24 00:10:25,836 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:25,837 INFO L215 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] [2024-10-24 00:10:25,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 00:10:25,837 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:25,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:25,838 INFO L85 PathProgramCache]: Analyzing trace with hash 439925314, now seen corresponding path program 1 times [2024-10-24 00:10:25,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:25,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064931849] [2024-10-24 00:10:25,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:25,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:10:25,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2007879701] [2024-10-24 00:10:25,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:25,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:25,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:25,858 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:25,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 00:10:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:25,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 00:10:25,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:10:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-24 00:10:26,118 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 00:10:26,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:26,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064931849] [2024-10-24 00:10:26,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:10:26,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007879701] [2024-10-24 00:10:26,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007879701] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:10:26,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:10:26,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 00:10:26,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669333673] [2024-10-24 00:10:26,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:10:26,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:10:26,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:26,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:10:26,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 00:10:26,124 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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) [2024-10-24 00:10:26,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:26,200 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2024-10-24 00:10:26,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 00:10:26,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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 46 [2024-10-24 00:10:26,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:26,202 INFO L225 Difference]: With dead ends: 64 [2024-10-24 00:10:26,202 INFO L226 Difference]: Without dead ends: 62 [2024-10-24 00:10:26,203 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:10:26,203 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:26,204 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 123 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:10:26,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-24 00:10:26,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2024-10-24 00:10:26,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 41 states have internal predecessors, (46), 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) [2024-10-24 00:10:26,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2024-10-24 00:10:26,215 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 46 [2024-10-24 00:10:26,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:26,216 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2024-10-24 00:10:26,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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) [2024-10-24 00:10:26,216 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2024-10-24 00:10:26,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-24 00:10:26,217 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:26,217 INFO L215 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] [2024-10-24 00:10:26,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 00:10:26,418 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 [2024-10-24 00:10:26,418 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:26,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:26,418 INFO L85 PathProgramCache]: Analyzing trace with hash -982723610, now seen corresponding path program 1 times [2024-10-24 00:10:26,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:26,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464687857] [2024-10-24 00:10:26,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:26,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:10:26,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423741398] [2024-10-24 00:10:26,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:26,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:26,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:26,448 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:26,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 00:10:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:26,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 00:10:26,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:10:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-24 00:10:26,604 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:10:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-24 00:10:26,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:26,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464687857] [2024-10-24 00:10:26,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:10:26,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423741398] [2024-10-24 00:10:26,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423741398] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-24 00:10:26,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:10:26,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-10-24 00:10:26,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496855254] [2024-10-24 00:10:26,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:10:26,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:10:26,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:26,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:10:26,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-24 00:10:26,709 INFO L87 Difference]: Start difference. First operand 61 states and 77 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, (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) [2024-10-24 00:10:26,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:26,766 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2024-10-24 00:10:26,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 00:10:26,767 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, (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 54 [2024-10-24 00:10:26,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:26,768 INFO L225 Difference]: With dead ends: 67 [2024-10-24 00:10:26,768 INFO L226 Difference]: Without dead ends: 65 [2024-10-24 00:10:26,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-24 00:10:26,769 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 117 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 [2024-10-24 00:10:26,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 117 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:10:26,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-10-24 00:10:26,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2024-10-24 00:10:26,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 37 states have internal predecessors, (43), 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) [2024-10-24 00:10:26,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2024-10-24 00:10:26,786 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 54 [2024-10-24 00:10:26,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:26,789 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2024-10-24 00:10:26,790 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, (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) [2024-10-24 00:10:26,790 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2024-10-24 00:10:26,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-24 00:10:26,790 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:26,790 INFO L215 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] [2024-10-24 00:10:26,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 00:10:26,991 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 [2024-10-24 00:10:26,991 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:26,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:26,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1428774585, now seen corresponding path program 1 times [2024-10-24 00:10:26,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:26,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630027741] [2024-10-24 00:10:26,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:26,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:27,116 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:10:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:27,121 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:10:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:27,125 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:10:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:27,128 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:10:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:27,132 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-24 00:10:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:27,135 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-24 00:10:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:27,139 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-24 00:10:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:27,143 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-24 00:10:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-24 00:10:27,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:27,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630027741] [2024-10-24 00:10:27,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630027741] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:10:27,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326543529] [2024-10-24 00:10:27,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:27,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:27,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:27,149 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:27,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 00:10:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:27,206 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 00:10:27,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:10:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-24 00:10:27,288 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:10:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-24 00:10:27,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326543529] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:10:27,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:10:27,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 12 [2024-10-24 00:10:27,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390948395] [2024-10-24 00:10:27,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:10:27,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 00:10:27,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:27,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 00:10:27,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-10-24 00:10:27,397 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2024-10-24 00:10:27,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:27,600 INFO L93 Difference]: Finished difference Result 210 states and 249 transitions. [2024-10-24 00:10:27,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-24 00:10:27,600 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) Word has length 55 [2024-10-24 00:10:27,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:27,602 INFO L225 Difference]: With dead ends: 210 [2024-10-24 00:10:27,603 INFO L226 Difference]: Without dead ends: 202 [2024-10-24 00:10:27,603 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2024-10-24 00:10:27,604 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 80 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:27,604 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 192 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:10:27,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-10-24 00:10:27,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2024-10-24 00:10:27,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 128 states have internal predecessors, (148), 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) [2024-10-24 00:10:27,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 232 transitions. [2024-10-24 00:10:27,637 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 232 transitions. Word has length 55 [2024-10-24 00:10:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:27,638 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 232 transitions. [2024-10-24 00:10:27,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2024-10-24 00:10:27,638 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 232 transitions. [2024-10-24 00:10:27,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-24 00:10:27,639 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:27,639 INFO L215 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] [2024-10-24 00:10:27,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-24 00:10:27,840 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 [2024-10-24 00:10:27,840 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:27,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:27,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1348925863, now seen corresponding path program 1 times [2024-10-24 00:10:27,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:27,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076391470] [2024-10-24 00:10:27,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:27,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:27,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:27,933 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:10:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:27,955 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:10:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:27,958 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:10:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:27,960 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:10:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:27,963 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-24 00:10:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:27,966 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-24 00:10:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:27,970 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-24 00:10:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:27,973 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-24 00:10:27,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-24 00:10:27,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:27,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076391470] [2024-10-24 00:10:27,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076391470] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:10:27,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376539349] [2024-10-24 00:10:27,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:27,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:27,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:27,979 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:27,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 00:10:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:28,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 00:10:28,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:10:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-24 00:10:28,083 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:10:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-24 00:10:28,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376539349] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:10:28,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:10:28,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-10-24 00:10:28,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596995897] [2024-10-24 00:10:28,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:10:28,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 00:10:28,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:28,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 00:10:28,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-24 00:10:28,192 INFO L87 Difference]: Start difference. First operand 194 states and 232 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 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) [2024-10-24 00:10:28,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:28,378 INFO L93 Difference]: Finished difference Result 278 states and 363 transitions. [2024-10-24 00:10:28,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 00:10:28,379 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 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 56 [2024-10-24 00:10:28,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:28,381 INFO L225 Difference]: With dead ends: 278 [2024-10-24 00:10:28,381 INFO L226 Difference]: Without dead ends: 258 [2024-10-24 00:10:28,382 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2024-10-24 00:10:28,382 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 60 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:28,383 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 241 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:10:28,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-10-24 00:10:28,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 234. [2024-10-24 00:10:28,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 151 states have (on average 1.2251655629139073) internal successors, (185), 154 states have internal predecessors, (185), 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) [2024-10-24 00:10:28,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 298 transitions. [2024-10-24 00:10:28,427 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 298 transitions. Word has length 56 [2024-10-24 00:10:28,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:28,427 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 298 transitions. [2024-10-24 00:10:28,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 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) [2024-10-24 00:10:28,428 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 298 transitions. [2024-10-24 00:10:28,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-24 00:10:28,431 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:28,431 INFO L215 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] [2024-10-24 00:10:28,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-24 00:10:28,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:28,633 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:28,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:28,634 INFO L85 PathProgramCache]: Analyzing trace with hash -848672706, now seen corresponding path program 1 times [2024-10-24 00:10:28,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:28,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416907200] [2024-10-24 00:10:28,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:28,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:28,748 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:10:28,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:28,751 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:10:28,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:28,754 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:10:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:28,757 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:10:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:28,762 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-24 00:10:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:28,765 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-24 00:10:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:28,768 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-24 00:10:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:28,771 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-24 00:10:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-24 00:10:28,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:28,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416907200] [2024-10-24 00:10:28,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416907200] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:10:28,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007073344] [2024-10-24 00:10:28,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:28,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:28,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:28,779 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:28,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 00:10:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:28,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 00:10:28,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:10:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-24 00:10:28,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:10:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-24 00:10:28,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007073344] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:10:28,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:10:28,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 12 [2024-10-24 00:10:28,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286493302] [2024-10-24 00:10:28,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:10:28,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 00:10:28,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:28,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 00:10:28,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-10-24 00:10:28,990 INFO L87 Difference]: Start difference. First operand 234 states and 298 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2024-10-24 00:10:29,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:29,185 INFO L93 Difference]: Finished difference Result 343 states and 447 transitions. [2024-10-24 00:10:29,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 00:10:29,186 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) Word has length 58 [2024-10-24 00:10:29,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:29,188 INFO L225 Difference]: With dead ends: 343 [2024-10-24 00:10:29,188 INFO L226 Difference]: Without dead ends: 247 [2024-10-24 00:10:29,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2024-10-24 00:10:29,190 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 90 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:29,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 184 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:10:29,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-10-24 00:10:29,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 243. [2024-10-24 00:10:29,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 160 states have (on average 1.175) internal successors, (188), 163 states have internal predecessors, (188), 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) [2024-10-24 00:10:29,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 301 transitions. [2024-10-24 00:10:29,233 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 301 transitions. Word has length 58 [2024-10-24 00:10:29,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:29,234 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 301 transitions. [2024-10-24 00:10:29,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2024-10-24 00:10:29,235 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 301 transitions. [2024-10-24 00:10:29,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-24 00:10:29,236 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:29,236 INFO L215 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] [2024-10-24 00:10:29,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-24 00:10:29,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-24 00:10:29,437 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:29,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:29,437 INFO L85 PathProgramCache]: Analyzing trace with hash -421956392, now seen corresponding path program 1 times [2024-10-24 00:10:29,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:29,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125021657] [2024-10-24 00:10:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:29,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:10:29,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257661085] [2024-10-24 00:10:29,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:29,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:29,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:29,462 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:29,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-24 00:10:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:29,528 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-24 00:10:29,529 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:10:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-24 00:10:29,834 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:10:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-10-24 00:10:29,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:29,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125021657] [2024-10-24 00:10:29,967 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:10:29,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257661085] [2024-10-24 00:10:29,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257661085] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:10:29,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:10:29,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2024-10-24 00:10:29,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042338048] [2024-10-24 00:10:29,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:10:29,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 00:10:29,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:29,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 00:10:29,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-10-24 00:10:29,969 INFO L87 Difference]: Start difference. First operand 243 states and 301 transitions. Second operand has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-10-24 00:10:30,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:30,191 INFO L93 Difference]: Finished difference Result 282 states and 354 transitions. [2024-10-24 00:10:30,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 00:10:30,192 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 63 [2024-10-24 00:10:30,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:30,194 INFO L225 Difference]: With dead ends: 282 [2024-10-24 00:10:30,195 INFO L226 Difference]: Without dead ends: 277 [2024-10-24 00:10:30,195 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-10-24 00:10:30,198 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 31 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:30,198 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 307 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:10:30,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-10-24 00:10:30,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 275. [2024-10-24 00:10:30,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 182 states have (on average 1.1868131868131868) internal successors, (216), 186 states have internal predecessors, (216), 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) [2024-10-24 00:10:30,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 342 transitions. [2024-10-24 00:10:30,237 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 342 transitions. Word has length 63 [2024-10-24 00:10:30,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:30,237 INFO L471 AbstractCegarLoop]: Abstraction has 275 states and 342 transitions. [2024-10-24 00:10:30,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-10-24 00:10:30,237 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 342 transitions. [2024-10-24 00:10:30,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-24 00:10:30,238 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:30,238 INFO L215 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] [2024-10-24 00:10:30,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-24 00:10:30,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:30,443 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:30,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:30,443 INFO L85 PathProgramCache]: Analyzing trace with hash -245166072, now seen corresponding path program 2 times [2024-10-24 00:10:30,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:30,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637480976] [2024-10-24 00:10:30,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:30,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:10:30,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757838898] [2024-10-24 00:10:30,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 00:10:30,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:30,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:30,462 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:30,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-24 00:10:30,528 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 00:10:30,529 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:10:30,534 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-24 00:10:30,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:10:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-24 00:10:30,955 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:10:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-24 00:10:31,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:31,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637480976] [2024-10-24 00:10:31,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:10:31,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757838898] [2024-10-24 00:10:31,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757838898] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:10:31,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:10:31,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-10-24 00:10:31,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012406412] [2024-10-24 00:10:31,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:10:31,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 00:10:31,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:31,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 00:10:31,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-10-24 00:10:31,302 INFO L87 Difference]: Start difference. First operand 275 states and 342 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 13 states have internal predecessors, (39), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2024-10-24 00:10:32,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:32,680 INFO L93 Difference]: Finished difference Result 439 states and 594 transitions. [2024-10-24 00:10:32,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 00:10:32,680 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 13 states have internal predecessors, (39), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 68 [2024-10-24 00:10:32,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:32,683 INFO L225 Difference]: With dead ends: 439 [2024-10-24 00:10:32,683 INFO L226 Difference]: Without dead ends: 437 [2024-10-24 00:10:32,684 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2024-10-24 00:10:32,684 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 115 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:32,684 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 388 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-24 00:10:32,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2024-10-24 00:10:32,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 392. [2024-10-24 00:10:32,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 257 states have (on average 1.245136186770428) internal successors, (320), 261 states have internal predecessors, (320), 101 states have call successors, (101), 33 states have call predecessors, (101), 33 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2024-10-24 00:10:32,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 518 transitions. [2024-10-24 00:10:32,748 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 518 transitions. Word has length 68 [2024-10-24 00:10:32,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:32,748 INFO L471 AbstractCegarLoop]: Abstraction has 392 states and 518 transitions. [2024-10-24 00:10:32,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 13 states have internal predecessors, (39), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2024-10-24 00:10:32,749 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 518 transitions. [2024-10-24 00:10:32,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-24 00:10:32,749 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:32,750 INFO L215 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] [2024-10-24 00:10:32,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-24 00:10:32,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-24 00:10:32,954 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:32,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:32,954 INFO L85 PathProgramCache]: Analyzing trace with hash -441972072, now seen corresponding path program 3 times [2024-10-24 00:10:32,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:32,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602252647] [2024-10-24 00:10:32,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:32,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:10:32,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558971827] [2024-10-24 00:10:32,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 00:10:32,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:32,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:32,973 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:32,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-24 00:10:33,039 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-24 00:10:33,040 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:10:33,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-24 00:10:33,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:10:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 42 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-24 00:10:33,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:10:51,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:51,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602252647] [2024-10-24 00:10:51,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:10:51,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558971827] [2024-10-24 00:10:51,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558971827] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:10:51,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:10:51,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-24 00:10:51,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193758043] [2024-10-24 00:10:51,725 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 00:10:51,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 00:10:51,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:51,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 00:10:51,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=535, Unknown=1, NotChecked=0, Total=650 [2024-10-24 00:10:51,726 INFO L87 Difference]: Start difference. First operand 392 states and 518 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 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) [2024-10-24 00:10:52,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:52,533 INFO L93 Difference]: Finished difference Result 415 states and 538 transitions. [2024-10-24 00:10:52,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 00:10:52,534 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 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 73 [2024-10-24 00:10:52,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:52,536 INFO L225 Difference]: With dead ends: 415 [2024-10-24 00:10:52,536 INFO L226 Difference]: Without dead ends: 411 [2024-10-24 00:10:52,537 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=167, Invalid=702, Unknown=1, NotChecked=0, Total=870 [2024-10-24 00:10:52,538 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 39 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:52,539 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 263 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 00:10:52,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2024-10-24 00:10:52,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 410. [2024-10-24 00:10:52,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 271 states have (on average 1.2287822878228782) internal successors, (333), 274 states have internal predecessors, (333), 101 states have call successors, (101), 38 states have call predecessors, (101), 37 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2024-10-24 00:10:52,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 531 transitions. [2024-10-24 00:10:52,607 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 531 transitions. Word has length 73 [2024-10-24 00:10:52,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:52,607 INFO L471 AbstractCegarLoop]: Abstraction has 410 states and 531 transitions. [2024-10-24 00:10:52,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 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) [2024-10-24 00:10:52,608 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 531 transitions. [2024-10-24 00:10:52,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-10-24 00:10:52,608 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:52,609 INFO L215 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] [2024-10-24 00:10:52,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-24 00:10:52,812 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 [2024-10-24 00:10:52,813 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:52,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:52,813 INFO L85 PathProgramCache]: Analyzing trace with hash 2054740817, now seen corresponding path program 1 times [2024-10-24 00:10:52,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:52,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691977566] [2024-10-24 00:10:52,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:52,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:10:52,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087104461] [2024-10-24 00:10:52,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:52,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:52,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:52,836 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:52,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-24 00:10:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:52,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-24 00:10:52,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:10:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-10-24 00:10:53,408 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:10:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-10-24 00:10:54,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:54,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691977566] [2024-10-24 00:10:54,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:10:54,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087104461] [2024-10-24 00:10:54,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087104461] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:10:54,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:10:54,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-10-24 00:10:54,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357852364] [2024-10-24 00:10:54,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:10:54,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-24 00:10:54,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:54,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-24 00:10:54,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-10-24 00:10:54,122 INFO L87 Difference]: Start difference. First operand 410 states and 531 transitions. Second operand has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 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) [2024-10-24 00:10:56,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:10:58,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:58,101 INFO L93 Difference]: Finished difference Result 607 states and 850 transitions. [2024-10-24 00:10:58,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-24 00:10:58,102 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 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 79 [2024-10-24 00:10:58,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:58,108 INFO L225 Difference]: With dead ends: 607 [2024-10-24 00:10:58,109 INFO L226 Difference]: Without dead ends: 596 [2024-10-24 00:10:58,111 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2024-10-24 00:10:58,112 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 129 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:58,112 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 668 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-10-24 00:10:58,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2024-10-24 00:10:58,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 552. [2024-10-24 00:10:58,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 356 states have (on average 1.297752808988764) internal successors, (462), 359 states have internal predecessors, (462), 156 states have call successors, (156), 39 states have call predecessors, (156), 39 states have return successors, (154), 153 states have call predecessors, (154), 154 states have call successors, (154) [2024-10-24 00:10:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 772 transitions. [2024-10-24 00:10:58,262 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 772 transitions. Word has length 79 [2024-10-24 00:10:58,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:58,262 INFO L471 AbstractCegarLoop]: Abstraction has 552 states and 772 transitions. [2024-10-24 00:10:58,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 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) [2024-10-24 00:10:58,263 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 772 transitions. [2024-10-24 00:10:58,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-10-24 00:10:58,264 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:58,264 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:10:58,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-24 00:10:58,467 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 [2024-10-24 00:10:58,468 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:58,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:58,468 INFO L85 PathProgramCache]: Analyzing trace with hash 653663042, now seen corresponding path program 4 times [2024-10-24 00:10:58,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:58,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771042208] [2024-10-24 00:10:58,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:58,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:58,559 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:10:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:58,561 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:10:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:58,564 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:10:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:58,566 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:10:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:58,568 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-24 00:10:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:58,570 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-24 00:10:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:58,571 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-24 00:10:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:58,573 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-24 00:10:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:58,578 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-10-24 00:10:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:58,581 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-24 00:10:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:58,584 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-24 00:10:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:58,587 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-10-24 00:10:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:58,589 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-10-24 00:10:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-10-24 00:10:58,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:58,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771042208] [2024-10-24 00:10:58,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771042208] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:10:58,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:10:58,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 00:10:58,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399685942] [2024-10-24 00:10:58,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:10:58,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:10:58,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:58,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:10:58,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 00:10:58,595 INFO L87 Difference]: Start difference. First operand 552 states and 772 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-10-24 00:10:58,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:58,798 INFO L93 Difference]: Finished difference Result 889 states and 1328 transitions. [2024-10-24 00:10:58,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 00:10:58,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 90 [2024-10-24 00:10:58,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:58,803 INFO L225 Difference]: With dead ends: 889 [2024-10-24 00:10:58,803 INFO L226 Difference]: Without dead ends: 625 [2024-10-24 00:10:58,805 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-24 00:10:58,805 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 12 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 181 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 [2024-10-24 00:10:58,805 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 181 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:10:58,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2024-10-24 00:10:58,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 530. [2024-10-24 00:10:58,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 338 states have (on average 1.2781065088757397) internal successors, (432), 341 states have internal predecessors, (432), 152 states have call successors, (152), 39 states have call predecessors, (152), 39 states have return successors, (150), 149 states have call predecessors, (150), 150 states have call successors, (150) [2024-10-24 00:10:58,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 734 transitions. [2024-10-24 00:10:58,924 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 734 transitions. Word has length 90 [2024-10-24 00:10:58,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:58,924 INFO L471 AbstractCegarLoop]: Abstraction has 530 states and 734 transitions. [2024-10-24 00:10:58,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-10-24 00:10:58,924 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 734 transitions. [2024-10-24 00:10:58,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-10-24 00:10:58,925 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:58,926 INFO L215 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] [2024-10-24 00:10:58,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-24 00:10:58,926 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:58,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:58,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1858222944, now seen corresponding path program 1 times [2024-10-24 00:10:58,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:58,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572532084] [2024-10-24 00:10:58,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:58,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:10:58,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015962452] [2024-10-24 00:10:58,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:58,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:58,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:58,948 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:58,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-24 00:10:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:59,025 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-24 00:10:59,028 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2024-10-24 00:11:00,136 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:00,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:00,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572532084] [2024-10-24 00:11:00,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:00,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015962452] [2024-10-24 00:11:00,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015962452] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:00,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:11:00,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-24 00:11:00,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391525764] [2024-10-24 00:11:00,258 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:00,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 00:11:00,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:00,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 00:11:00,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-10-24 00:11:00,259 INFO L87 Difference]: Start difference. First operand 530 states and 734 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 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) [2024-10-24 00:11:01,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:01,123 INFO L93 Difference]: Finished difference Result 539 states and 742 transitions. [2024-10-24 00:11:01,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-24 00:11:01,124 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 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 96 [2024-10-24 00:11:01,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:01,127 INFO L225 Difference]: With dead ends: 539 [2024-10-24 00:11:01,127 INFO L226 Difference]: Without dead ends: 537 [2024-10-24 00:11:01,128 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-10-24 00:11:01,128 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 37 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:01,129 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 465 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-24 00:11:01,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2024-10-24 00:11:01,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 534. [2024-10-24 00:11:01,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 341 states have (on average 1.2727272727272727) internal successors, (434), 344 states have internal predecessors, (434), 152 states have call successors, (152), 40 states have call predecessors, (152), 40 states have return successors, (150), 149 states have call predecessors, (150), 150 states have call successors, (150) [2024-10-24 00:11:01,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 736 transitions. [2024-10-24 00:11:01,248 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 736 transitions. Word has length 96 [2024-10-24 00:11:01,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:01,248 INFO L471 AbstractCegarLoop]: Abstraction has 534 states and 736 transitions. [2024-10-24 00:11:01,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 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) [2024-10-24 00:11:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 736 transitions. [2024-10-24 00:11:01,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-10-24 00:11:01,250 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:01,250 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 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, 1, 1, 1, 1] [2024-10-24 00:11:01,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-24 00:11:01,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-24 00:11:01,451 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:01,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:01,451 INFO L85 PathProgramCache]: Analyzing trace with hash 973829189, now seen corresponding path program 1 times [2024-10-24 00:11:01,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:01,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523195197] [2024-10-24 00:11:01,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:01,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,562 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:11:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,564 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:11:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,565 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:11:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,571 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:11:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,572 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-24 00:11:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,577 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-24 00:11:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,589 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-24 00:11:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,593 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-24 00:11:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,595 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-10-24 00:11:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,598 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-24 00:11:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,600 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-24 00:11:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,604 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-10-24 00:11:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,607 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-10-24 00:11:01,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,614 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-10-24 00:11:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,619 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-10-24 00:11:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,621 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-10-24 00:11:01,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,627 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-10-24 00:11:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,631 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-10-24 00:11:01,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:01,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523195197] [2024-10-24 00:11:01,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523195197] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:01,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057259109] [2024-10-24 00:11:01,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:01,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:01,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:01,634 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:01,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-24 00:11:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 00:11:01,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 92 proven. 11 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2024-10-24 00:11:01,746 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:01,829 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-10-24 00:11:01,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057259109] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:11:01,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:11:01,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-10-24 00:11:01,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916332441] [2024-10-24 00:11:01,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:01,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 00:11:01,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:01,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 00:11:01,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-24 00:11:01,831 INFO L87 Difference]: Start difference. First operand 534 states and 736 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-10-24 00:11:02,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:02,165 INFO L93 Difference]: Finished difference Result 730 states and 1052 transitions. [2024-10-24 00:11:02,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 00:11:02,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 111 [2024-10-24 00:11:02,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:02,169 INFO L225 Difference]: With dead ends: 730 [2024-10-24 00:11:02,169 INFO L226 Difference]: Without dead ends: 717 [2024-10-24 00:11:02,170 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 255 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-10-24 00:11:02,170 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 31 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:02,171 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 388 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:11:02,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2024-10-24 00:11:02,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 578. [2024-10-24 00:11:02,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 377 states have (on average 1.2785145888594165) internal successors, (482), 380 states have internal predecessors, (482), 160 states have call successors, (160), 40 states have call predecessors, (160), 40 states have return successors, (158), 157 states have call predecessors, (158), 158 states have call successors, (158) [2024-10-24 00:11:02,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 800 transitions. [2024-10-24 00:11:02,295 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 800 transitions. Word has length 111 [2024-10-24 00:11:02,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:02,296 INFO L471 AbstractCegarLoop]: Abstraction has 578 states and 800 transitions. [2024-10-24 00:11:02,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-10-24 00:11:02,297 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 800 transitions. [2024-10-24 00:11:02,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-10-24 00:11:02,298 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:02,298 INFO L215 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] [2024-10-24 00:11:02,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-24 00:11:02,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:02,499 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:02,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:02,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1981200126, now seen corresponding path program 1 times [2024-10-24 00:11:02,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:02,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422572530] [2024-10-24 00:11:02,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:02,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:02,738 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:11:02,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:02,741 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:11:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:02,743 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:11:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:02,745 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:11:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:02,748 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-24 00:11:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:02,751 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-24 00:11:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:02,754 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-24 00:11:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:02,756 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-24 00:11:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:02,759 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-10-24 00:11:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:02,762 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-24 00:11:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:02,766 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-24 00:11:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:02,768 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-10-24 00:11:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:02,770 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-10-24 00:11:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:02,776 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-10-24 00:11:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:02,779 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-10-24 00:11:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:02,781 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-10-24 00:11:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:02,785 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-10-24 00:11:02,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:02,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422572530] [2024-10-24 00:11:02,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422572530] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:02,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332453947] [2024-10-24 00:11:02,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:02,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:02,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:02,788 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:02,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-24 00:11:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:02,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 00:11:02,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:02,997 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-10-24 00:11:02,997 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-10-24 00:11:03,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332453947] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:11:03,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:11:03,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 20 [2024-10-24 00:11:03,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127515230] [2024-10-24 00:11:03,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:03,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-24 00:11:03,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:03,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-24 00:11:03,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=224, Unknown=0, NotChecked=0, Total=380 [2024-10-24 00:11:03,188 INFO L87 Difference]: Start difference. First operand 578 states and 800 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 10 states have call successors, (49), 6 states have call predecessors, (49), 5 states have return successors, (48), 9 states have call predecessors, (48), 9 states have call successors, (48) [2024-10-24 00:11:04,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:04,047 INFO L93 Difference]: Finished difference Result 1897 states and 2637 transitions. [2024-10-24 00:11:04,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-24 00:11:04,048 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 10 states have call successors, (49), 6 states have call predecessors, (49), 5 states have return successors, (48), 9 states have call predecessors, (48), 9 states have call successors, (48) Word has length 111 [2024-10-24 00:11:04,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:04,055 INFO L225 Difference]: With dead ends: 1897 [2024-10-24 00:11:04,056 INFO L226 Difference]: Without dead ends: 1588 [2024-10-24 00:11:04,057 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2024-10-24 00:11:04,058 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 253 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:04,058 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 301 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 00:11:04,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2024-10-24 00:11:04,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1514. [2024-10-24 00:11:04,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 948 states have (on average 1.2056962025316456) internal successors, (1143), 965 states have internal predecessors, (1143), 429 states have call successors, (429), 136 states have call predecessors, (429), 136 states have return successors, (413), 412 states have call predecessors, (413), 413 states have call successors, (413) [2024-10-24 00:11:04,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 1985 transitions. [2024-10-24 00:11:04,445 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 1985 transitions. Word has length 111 [2024-10-24 00:11:04,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:04,445 INFO L471 AbstractCegarLoop]: Abstraction has 1514 states and 1985 transitions. [2024-10-24 00:11:04,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 10 states have call successors, (49), 6 states have call predecessors, (49), 5 states have return successors, (48), 9 states have call predecessors, (48), 9 states have call successors, (48) [2024-10-24 00:11:04,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 1985 transitions. [2024-10-24 00:11:04,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-10-24 00:11:04,447 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:04,447 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:11:04,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-24 00:11:04,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:04,652 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:04,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:04,653 INFO L85 PathProgramCache]: Analyzing trace with hash -904635594, now seen corresponding path program 2 times [2024-10-24 00:11:04,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:04,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241633417] [2024-10-24 00:11:04,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:04,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:04,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562178305] [2024-10-24 00:11:04,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 00:11:04,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:04,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:04,688 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:04,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-24 00:11:04,776 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 00:11:04,776 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:11:04,783 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-24 00:11:04,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 58 proven. 56 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2024-10-24 00:11:05,479 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2024-10-24 00:11:05,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:05,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241633417] [2024-10-24 00:11:05,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:05,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562178305] [2024-10-24 00:11:05,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562178305] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:11:05,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:11:05,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2024-10-24 00:11:05,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277060417] [2024-10-24 00:11:05,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:05,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-24 00:11:05,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:05,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-24 00:11:05,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-10-24 00:11:05,675 INFO L87 Difference]: Start difference. First operand 1514 states and 1985 transitions. Second operand has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 20 states have internal predecessors, (60), 9 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 9 states have call successors, (28) [2024-10-24 00:11:09,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:09,133 INFO L93 Difference]: Finished difference Result 1673 states and 2185 transitions. [2024-10-24 00:11:09,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 00:11:09,134 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 20 states have internal predecessors, (60), 9 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 9 states have call successors, (28) Word has length 113 [2024-10-24 00:11:09,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:09,144 INFO L225 Difference]: With dead ends: 1673 [2024-10-24 00:11:09,144 INFO L226 Difference]: Without dead ends: 1658 [2024-10-24 00:11:09,146 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2024-10-24 00:11:09,146 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 80 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:09,146 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 551 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-10-24 00:11:09,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2024-10-24 00:11:09,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1584. [2024-10-24 00:11:09,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1010 states have (on average 1.2) internal successors, (1212), 1024 states have internal predecessors, (1212), 422 states have call successors, (422), 151 states have call predecessors, (422), 151 states have return successors, (413), 408 states have call predecessors, (413), 413 states have call successors, (413) [2024-10-24 00:11:09,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 2047 transitions. [2024-10-24 00:11:09,550 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 2047 transitions. Word has length 113 [2024-10-24 00:11:09,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:09,551 INFO L471 AbstractCegarLoop]: Abstraction has 1584 states and 2047 transitions. [2024-10-24 00:11:09,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 20 states have internal predecessors, (60), 9 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 9 states have call successors, (28) [2024-10-24 00:11:09,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 2047 transitions. [2024-10-24 00:11:09,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-10-24 00:11:09,553 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:09,553 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:11:09,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-24 00:11:09,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:09,758 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:09,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:09,758 INFO L85 PathProgramCache]: Analyzing trace with hash 493843562, now seen corresponding path program 3 times [2024-10-24 00:11:09,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:09,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005621725] [2024-10-24 00:11:09,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:09,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:09,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547074705] [2024-10-24 00:11:09,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 00:11:09,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:09,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:09,794 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:09,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-24 00:11:09,871 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-24 00:11:09,871 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:11:09,878 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-10-24 00:11:09,880 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 75 proven. 47 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2024-10-24 00:11:10,726 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:11,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:11,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005621725] [2024-10-24 00:11:11,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:11,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547074705] [2024-10-24 00:11:11,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547074705] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:11,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:11:11,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-10-24 00:11:11,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581112085] [2024-10-24 00:11:11,691 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:11,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-24 00:11:11,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:11,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-24 00:11:11,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2024-10-24 00:11:11,693 INFO L87 Difference]: Start difference. First operand 1584 states and 2047 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-10-24 00:11:12,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:12,526 INFO L93 Difference]: Finished difference Result 1714 states and 2184 transitions. [2024-10-24 00:11:12,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-24 00:11:12,527 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 118 [2024-10-24 00:11:12,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:12,536 INFO L225 Difference]: With dead ends: 1714 [2024-10-24 00:11:12,537 INFO L226 Difference]: Without dead ends: 1712 [2024-10-24 00:11:12,538 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2024-10-24 00:11:12,539 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 29 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:12,539 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 556 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 00:11:12,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2024-10-24 00:11:12,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1697. [2024-10-24 00:11:12,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1084 states have (on average 1.1918819188191883) internal successors, (1292), 1098 states have internal predecessors, (1292), 442 states have call successors, (442), 170 states have call predecessors, (442), 170 states have return successors, (433), 428 states have call predecessors, (433), 433 states have call successors, (433) [2024-10-24 00:11:12,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 2167 transitions. [2024-10-24 00:11:12,989 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 2167 transitions. Word has length 118 [2024-10-24 00:11:12,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:12,990 INFO L471 AbstractCegarLoop]: Abstraction has 1697 states and 2167 transitions. [2024-10-24 00:11:12,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-10-24 00:11:12,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 2167 transitions. [2024-10-24 00:11:12,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-10-24 00:11:12,992 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:12,992 INFO L215 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] [2024-10-24 00:11:13,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-24 00:11:13,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:13,196 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:13,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:13,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1344061032, now seen corresponding path program 4 times [2024-10-24 00:11:13,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:13,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844248064] [2024-10-24 00:11:13,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:13,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:13,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160026410] [2024-10-24 00:11:13,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 00:11:13,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:13,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:13,220 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:13,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-24 00:11:13,305 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 00:11:13,305 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:11:13,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-24 00:11:13,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 100 proven. 59 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-10-24 00:11:14,808 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:14,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:14,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844248064] [2024-10-24 00:11:14,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:14,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160026410] [2024-10-24 00:11:14,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160026410] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:14,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:11:14,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-10-24 00:11:14,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371516217] [2024-10-24 00:11:14,936 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:14,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 00:11:14,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:14,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 00:11:14,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-10-24 00:11:14,937 INFO L87 Difference]: Start difference. First operand 1697 states and 2167 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2024-10-24 00:11:16,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:16,013 INFO L93 Difference]: Finished difference Result 1810 states and 2303 transitions. [2024-10-24 00:11:16,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-24 00:11:16,016 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 119 [2024-10-24 00:11:16,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:16,026 INFO L225 Difference]: With dead ends: 1810 [2024-10-24 00:11:16,026 INFO L226 Difference]: Without dead ends: 1808 [2024-10-24 00:11:16,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2024-10-24 00:11:16,027 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 42 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:16,028 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 688 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-24 00:11:16,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2024-10-24 00:11:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1694. [2024-10-24 00:11:16,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1084 states have (on average 1.1900369003690037) internal successors, (1290), 1098 states have internal predecessors, (1290), 438 states have call successors, (438), 171 states have call predecessors, (438), 171 states have return successors, (429), 424 states have call predecessors, (429), 429 states have call successors, (429) [2024-10-24 00:11:16,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 2157 transitions. [2024-10-24 00:11:16,436 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 2157 transitions. Word has length 119 [2024-10-24 00:11:16,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:16,436 INFO L471 AbstractCegarLoop]: Abstraction has 1694 states and 2157 transitions. [2024-10-24 00:11:16,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2024-10-24 00:11:16,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 2157 transitions. [2024-10-24 00:11:16,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-10-24 00:11:16,438 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:16,438 INFO L215 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] [2024-10-24 00:11:16,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-24 00:11:16,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:16,639 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:16,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:16,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1393224842, now seen corresponding path program 5 times [2024-10-24 00:11:16,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:16,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919087408] [2024-10-24 00:11:16,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:16,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:16,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225254896] [2024-10-24 00:11:16,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 00:11:16,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:16,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:16,675 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:16,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-24 00:11:16,844 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-24 00:11:16,844 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:11:16,846 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-10-24 00:11:16,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 74 proven. 56 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2024-10-24 00:11:18,052 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:40,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:40,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919087408] [2024-10-24 00:11:40,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:40,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225254896] [2024-10-24 00:11:40,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225254896] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:40,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:11:40,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-10-24 00:11:40,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580171777] [2024-10-24 00:11:40,224 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:40,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 00:11:40,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:40,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 00:11:40,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=614, Unknown=3, NotChecked=0, Total=756 [2024-10-24 00:11:40,226 INFO L87 Difference]: Start difference. First operand 1694 states and 2157 transitions. Second operand has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 7 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) [2024-10-24 00:11:41,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:41,638 INFO L93 Difference]: Finished difference Result 1743 states and 2205 transitions. [2024-10-24 00:11:41,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-24 00:11:41,639 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 7 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 123 [2024-10-24 00:11:41,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:41,647 INFO L225 Difference]: With dead ends: 1743 [2024-10-24 00:11:41,648 INFO L226 Difference]: Without dead ends: 1741 [2024-10-24 00:11:41,648 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=213, Invalid=906, Unknown=3, NotChecked=0, Total=1122 [2024-10-24 00:11:41,649 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 48 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:41,649 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 616 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-24 00:11:41,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2024-10-24 00:11:42,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 1726. [2024-10-24 00:11:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1108 states have (on average 1.1859205776173285) internal successors, (1314), 1122 states have internal predecessors, (1314), 438 states have call successors, (438), 179 states have call predecessors, (438), 179 states have return successors, (429), 424 states have call predecessors, (429), 429 states have call successors, (429) [2024-10-24 00:11:42,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2181 transitions. [2024-10-24 00:11:42,044 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2181 transitions. Word has length 123 [2024-10-24 00:11:42,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:42,045 INFO L471 AbstractCegarLoop]: Abstraction has 1726 states and 2181 transitions. [2024-10-24 00:11:42,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 7 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) [2024-10-24 00:11:42,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2181 transitions. [2024-10-24 00:11:42,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-10-24 00:11:42,048 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:42,048 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:11:42,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-24 00:11:42,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:42,249 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:42,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:42,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1122492623, now seen corresponding path program 1 times [2024-10-24 00:11:42,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:42,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325398202] [2024-10-24 00:11:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:42,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:42,434 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:11:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:42,438 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:11:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:42,440 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:11:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:42,441 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:11:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:42,444 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-24 00:11:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:42,446 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-24 00:11:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:42,448 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-24 00:11:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:42,449 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-24 00:11:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:42,452 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-10-24 00:11:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:42,453 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-24 00:11:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:42,455 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-24 00:11:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:42,459 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-10-24 00:11:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:42,461 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-10-24 00:11:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:42,462 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-10-24 00:11:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:42,464 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-10-24 00:11:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:42,468 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-10-24 00:11:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:42,470 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-10-24 00:11:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:42,475 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-10-24 00:11:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:42,477 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-10-24 00:11:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:42,478 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2024-10-24 00:11:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-10-24 00:11:42,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:42,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325398202] [2024-10-24 00:11:42,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325398202] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:42,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245446147] [2024-10-24 00:11:42,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:42,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:42,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:42,486 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:42,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-24 00:11:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:42,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 00:11:42,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-10-24 00:11:42,700 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:42,906 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-10-24 00:11:42,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245446147] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:11:42,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:11:42,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 20 [2024-10-24 00:11:42,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647249112] [2024-10-24 00:11:42,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:42,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-24 00:11:42,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:42,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-24 00:11:42,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2024-10-24 00:11:42,909 INFO L87 Difference]: Start difference. First operand 1726 states and 2181 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 12 states have call successors, (61), 7 states have call predecessors, (61), 6 states have return successors, (60), 11 states have call predecessors, (60), 11 states have call successors, (60) [2024-10-24 00:11:43,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:43,626 INFO L93 Difference]: Finished difference Result 1794 states and 2245 transitions. [2024-10-24 00:11:43,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-24 00:11:43,626 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 12 states have call successors, (61), 7 states have call predecessors, (61), 6 states have return successors, (60), 11 states have call predecessors, (60), 11 states have call successors, (60) Word has length 128 [2024-10-24 00:11:43,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:43,634 INFO L225 Difference]: With dead ends: 1794 [2024-10-24 00:11:43,634 INFO L226 Difference]: Without dead ends: 1752 [2024-10-24 00:11:43,635 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=328, Invalid=602, Unknown=0, NotChecked=0, Total=930 [2024-10-24 00:11:43,635 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 212 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:43,636 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 250 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 00:11:43,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2024-10-24 00:11:43,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1738. [2024-10-24 00:11:43,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1120 states have (on average 1.1651785714285714) internal successors, (1305), 1134 states have internal predecessors, (1305), 438 states have call successors, (438), 179 states have call predecessors, (438), 179 states have return successors, (429), 424 states have call predecessors, (429), 429 states have call successors, (429) [2024-10-24 00:11:43,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 2172 transitions. [2024-10-24 00:11:43,987 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 2172 transitions. Word has length 128 [2024-10-24 00:11:43,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:43,988 INFO L471 AbstractCegarLoop]: Abstraction has 1738 states and 2172 transitions. [2024-10-24 00:11:43,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 12 states have call successors, (61), 7 states have call predecessors, (61), 6 states have return successors, (60), 11 states have call predecessors, (60), 11 states have call successors, (60) [2024-10-24 00:11:43,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 2172 transitions. [2024-10-24 00:11:43,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-10-24 00:11:43,989 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:43,990 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:11:44,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-24 00:11:44,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-24 00:11:44,194 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:44,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:44,194 INFO L85 PathProgramCache]: Analyzing trace with hash -444119633, now seen corresponding path program 2 times [2024-10-24 00:11:44,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:44,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132697024] [2024-10-24 00:11:44,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:44,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:44,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:44,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277360959] [2024-10-24 00:11:44,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 00:11:44,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:44,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:44,227 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:44,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-24 00:11:44,314 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 00:11:44,314 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:11:44,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-10-24 00:11:44,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 73 proven. 65 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-10-24 00:11:45,037 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 73 proven. 56 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2024-10-24 00:11:47,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:47,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132697024] [2024-10-24 00:11:47,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:47,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277360959] [2024-10-24 00:11:47,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277360959] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:11:47,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:11:47,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2024-10-24 00:11:47,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443903679] [2024-10-24 00:11:47,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:47,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-24 00:11:47,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:47,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-24 00:11:47,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2024-10-24 00:11:47,505 INFO L87 Difference]: Start difference. First operand 1738 states and 2172 transitions. Second operand has 30 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 15 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) [2024-10-24 00:11:51,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []