./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_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.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 fc71ae13b1bed24e074eb2de07c8f2064aa903343708c3aabf1b928078c9e7f6 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 18:50:52,462 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 18:50:52,528 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 18:50:52,533 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 18:50:52,534 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 18:50:52,564 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 18:50:52,565 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 18:50:52,565 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 18:50:52,566 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 18:50:52,567 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 18:50:52,567 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 18:50:52,567 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 18:50:52,568 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 18:50:52,568 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 18:50:52,570 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 18:50:52,570 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 18:50:52,571 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 18:50:52,571 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 18:50:52,571 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 18:50:52,575 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 18:50:52,575 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 18:50:52,576 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 18:50:52,576 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 18:50:52,576 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 18:50:52,577 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 18:50:52,577 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 18:50:52,577 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 18:50:52,578 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 18:50:52,578 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 18:50:52,578 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 18:50:52,578 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 18:50:52,579 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 18:50:52,579 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:50:52,580 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 18:50:52,580 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 18:50:52,580 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 18:50:52,581 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 18:50:52,581 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 18:50:52,581 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 18:50:52,582 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 18:50:52,582 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 18:50:52,582 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 18:50:52,582 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc71ae13b1bed24e074eb2de07c8f2064aa903343708c3aabf1b928078c9e7f6 [2024-10-12 18:50:52,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 18:50:52,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 18:50:52,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 18:50:52,883 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 18:50:52,883 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 18:50:52,884 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c [2024-10-12 18:50:54,252 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 18:50:54,442 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 18:50:54,442 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c [2024-10-12 18:50:54,449 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b09f5444d/68c3f02b0eb24708a07a0f9e2daebcba/FLAG6e8386bba [2024-10-12 18:50:54,463 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b09f5444d/68c3f02b0eb24708a07a0f9e2daebcba [2024-10-12 18:50:54,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 18:50:54,466 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 18:50:54,467 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 18:50:54,467 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 18:50:54,472 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 18:50:54,473 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:50:54" (1/1) ... [2024-10-12 18:50:54,476 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@106b1213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:50:54, skipping insertion in model container [2024-10-12 18:50:54,476 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:50:54" (1/1) ... [2024-10-12 18:50:54,495 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 18:50:54,667 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_valuebound50.c[490,503] [2024-10-12 18:50:54,699 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:50:54,709 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 18:50:54,722 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_valuebound50.c[490,503] [2024-10-12 18:50:54,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:50:54,751 INFO L204 MainTranslator]: Completed translation [2024-10-12 18:50:54,752 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:50:54 WrapperNode [2024-10-12 18:50:54,752 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 18:50:54,753 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 18:50:54,753 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 18:50:54,753 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 18:50:54,764 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:50:54" (1/1) ... [2024-10-12 18:50:54,771 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:50:54" (1/1) ... [2024-10-12 18:50:54,788 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 79 [2024-10-12 18:50:54,789 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 18:50:54,789 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 18:50:54,790 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 18:50:54,790 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 18:50:54,802 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:50:54" (1/1) ... [2024-10-12 18:50:54,803 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:50:54" (1/1) ... [2024-10-12 18:50:54,805 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:50:54" (1/1) ... [2024-10-12 18:50:54,817 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-12 18:50:54,817 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:50:54" (1/1) ... [2024-10-12 18:50:54,817 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:50:54" (1/1) ... [2024-10-12 18:50:54,820 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:50:54" (1/1) ... [2024-10-12 18:50:54,824 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:50:54" (1/1) ... [2024-10-12 18:50:54,825 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:50:54" (1/1) ... [2024-10-12 18:50:54,826 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:50:54" (1/1) ... [2024-10-12 18:50:54,828 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 18:50:54,829 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 18:50:54,829 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 18:50:54,829 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 18:50:54,830 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:50:54" (1/1) ... [2024-10-12 18:50:54,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:50:54,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:50:54,866 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-12 18:50:54,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-12 18:50:54,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 18:50:54,914 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-12 18:50:54,914 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-12 18:50:54,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 18:50:54,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 18:50:54,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 18:50:54,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-12 18:50:54,915 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-12 18:50:54,968 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 18:50:54,970 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 18:50:55,134 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-12 18:50:55,134 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 18:50:55,165 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 18:50:55,168 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-12 18:50:55,169 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:50:55 BoogieIcfgContainer [2024-10-12 18:50:55,169 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 18:50:55,173 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 18:50:55,174 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 18:50:55,177 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 18:50:55,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 06:50:54" (1/3) ... [2024-10-12 18:50:55,180 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df569fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:50:55, skipping insertion in model container [2024-10-12 18:50:55,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:50:54" (2/3) ... [2024-10-12 18:50:55,180 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df569fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:50:55, skipping insertion in model container [2024-10-12 18:50:55,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:50:55" (3/3) ... [2024-10-12 18:50:55,185 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound50.c [2024-10-12 18:50:55,201 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 18:50:55,201 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 18:50:55,261 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 18:50:55,267 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;@23474b9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 18:50:55,267 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 18:50:55,271 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 16 states have (on average 1.5625) internal successors, (25), 18 states have internal predecessors, (25), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-12 18:50:55,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-12 18:50:55,277 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:50:55,278 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:50:55,279 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:50:55,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:50:55,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1865535902, now seen corresponding path program 1 times [2024-10-12 18:50:55,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:50:55,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298240183] [2024-10-12 18:50:55,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:50:55,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:50:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:55,513 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:50:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:55,523 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 18:50:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:55,528 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-12 18:50:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:55,532 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-12 18:50:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:55,541 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-12 18:50:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:55,554 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-12 18:50:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-12 18:50:55,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:50:55,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298240183] [2024-10-12 18:50:55,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298240183] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:50:55,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:50:55,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 18:50:55,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144364639] [2024-10-12 18:50:55,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:50:55,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 18:50:55,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:50:55,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 18:50:55,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 18:50:55,602 INFO L87 Difference]: Start difference. First operand has 32 states, 16 states have (on average 1.5625) internal successors, (25), 18 states have internal predecessors, (25), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 18:50:55,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:50:55,641 INFO L93 Difference]: Finished difference Result 62 states and 107 transitions. [2024-10-12 18:50:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 18:50:55,643 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2024-10-12 18:50:55,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:50:55,650 INFO L225 Difference]: With dead ends: 62 [2024-10-12 18:50:55,651 INFO L226 Difference]: Without dead ends: 30 [2024-10-12 18:50:55,655 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 18:50:55,660 INFO L432 NwaCegarLoop]: 41 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, 41 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:50:55,661 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:50:55,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-12 18:50:55,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-10-12 18:50:55,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-12 18:50:55,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2024-10-12 18:50:55,704 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 38 [2024-10-12 18:50:55,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:50:55,705 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2024-10-12 18:50:55,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 18:50:55,705 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2024-10-12 18:50:55,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-12 18:50:55,707 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:50:55,707 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:50:55,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 18:50:55,708 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:50:55,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:50:55,709 INFO L85 PathProgramCache]: Analyzing trace with hash -279596905, now seen corresponding path program 1 times [2024-10-12 18:50:55,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:50:55,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718657382] [2024-10-12 18:50:55,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:50:55,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:50:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:55,977 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:50:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:55,985 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 18:50:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:55,993 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-12 18:50:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:56,002 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-12 18:50:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:56,065 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-12 18:50:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:56,072 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-12 18:50:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-12 18:50:56,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:50:56,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718657382] [2024-10-12 18:50:56,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718657382] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:50:56,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896172132] [2024-10-12 18:50:56,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:50:56,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:50:56,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:50:56,086 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:50:56,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 18:50:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:56,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-12 18:50:56,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:50:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-12 18:50:56,459 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:50:56,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896172132] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:50:56,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:50:56,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2024-10-12 18:50:56,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740281578] [2024-10-12 18:50:56,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:50:56,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-12 18:50:56,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:50:56,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-12 18:50:56,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-10-12 18:50:56,625 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-10-12 18:50:56,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:50:56,869 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2024-10-12 18:50:56,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-12 18:50:56,870 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 39 [2024-10-12 18:50:56,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:50:56,872 INFO L225 Difference]: With dead ends: 51 [2024-10-12 18:50:56,872 INFO L226 Difference]: Without dead ends: 43 [2024-10-12 18:50:56,872 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-10-12 18:50:56,873 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 33 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 18:50:56,874 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 207 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 18:50:56,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-12 18:50:56,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-10-12 18:50:56,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-10-12 18:50:56,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2024-10-12 18:50:56,894 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 39 [2024-10-12 18:50:56,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:50:56,895 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2024-10-12 18:50:56,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-10-12 18:50:56,895 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2024-10-12 18:50:56,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-12 18:50:56,896 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:50:56,896 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:50:56,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-12 18:50:57,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:50:57,100 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:50:57,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:50:57,100 INFO L85 PathProgramCache]: Analyzing trace with hash -76887146, now seen corresponding path program 1 times [2024-10-12 18:50:57,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:50:57,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179172300] [2024-10-12 18:50:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:50:57,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:50:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:50:57,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452136840] [2024-10-12 18:50:57,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:50:57,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:50:57,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:50:57,140 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:50:57,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 18:50:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:57,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-12 18:50:57,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:50:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-12 18:50:57,242 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 18:50:57,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:50:57,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179172300] [2024-10-12 18:50:57,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:50:57,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452136840] [2024-10-12 18:50:57,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452136840] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:50:57,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:50:57,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 18:50:57,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866957852] [2024-10-12 18:50:57,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:50:57,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 18:50:57,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:50:57,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 18:50:57,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 18:50:57,248 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-12 18:50:57,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:50:57,300 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2024-10-12 18:50:57,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 18:50:57,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2024-10-12 18:50:57,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:50:57,311 INFO L225 Difference]: With dead ends: 61 [2024-10-12 18:50:57,311 INFO L226 Difference]: Without dead ends: 59 [2024-10-12 18:50:57,312 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 18:50:57,313 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:50:57,317 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 129 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:50:57,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-12 18:50:57,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2024-10-12 18:50:57,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 30 states have internal predecessors, (31), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-12 18:50:57,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2024-10-12 18:50:57,335 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 40 [2024-10-12 18:50:57,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:50:57,336 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2024-10-12 18:50:57,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-12 18:50:57,336 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2024-10-12 18:50:57,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-12 18:50:57,338 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:50:57,338 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:50:57,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-12 18:50:57,542 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,SelfDestructingSolverStorable2 [2024-10-12 18:50:57,543 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:50:57,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:50:57,544 INFO L85 PathProgramCache]: Analyzing trace with hash 345761675, now seen corresponding path program 1 times [2024-10-12 18:50:57,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:50:57,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133116915] [2024-10-12 18:50:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:50:57,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:50:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:50:57,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186190065] [2024-10-12 18:50:57,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:50:57,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:50:57,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:50:57,566 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:50:57,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 18:50:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:57,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-12 18:50:57,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:50:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-12 18:50:57,711 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 18:50:57,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:50:57,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133116915] [2024-10-12 18:50:57,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:50:57,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186190065] [2024-10-12 18:50:57,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186190065] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:50:57,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:50:57,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 18:50:57,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984134286] [2024-10-12 18:50:57,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:50:57,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 18:50:57,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:50:57,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 18:50:57,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 18:50:57,714 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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) [2024-10-12 18:50:57,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:50:57,762 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2024-10-12 18:50:57,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 18:50:57,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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 45 [2024-10-12 18:50:57,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:50:57,765 INFO L225 Difference]: With dead ends: 57 [2024-10-12 18:50:57,766 INFO L226 Difference]: Without dead ends: 55 [2024-10-12 18:50:57,766 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 18:50:57,767 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:50:57,768 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 139 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:50:57,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-12 18:50:57,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2024-10-12 18:50:57,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 33 states have internal predecessors, (34), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-12 18:50:57,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2024-10-12 18:50:57,779 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 45 [2024-10-12 18:50:57,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:50:57,780 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2024-10-12 18:50:57,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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) [2024-10-12 18:50:57,780 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2024-10-12 18:50:57,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-12 18:50:57,781 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:50:57,781 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:50:57,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-12 18:50:57,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:50:57,986 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:50:57,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:50:57,986 INFO L85 PathProgramCache]: Analyzing trace with hash -2047387093, now seen corresponding path program 1 times [2024-10-12 18:50:57,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:50:57,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523541100] [2024-10-12 18:50:57,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:50:57,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:50:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:50:58,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032477261] [2024-10-12 18:50:58,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:50:58,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:50:58,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:50:58,014 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:50:58,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 18:50:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:58,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-12 18:50:58,073 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:50:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-12 18:50:58,307 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:50:58,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:50:58,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523541100] [2024-10-12 18:50:58,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:50:58,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032477261] [2024-10-12 18:50:58,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032477261] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:50:58,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 18:50:58,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-10-12 18:50:58,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827360721] [2024-10-12 18:50:58,365 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 18:50:58,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-12 18:50:58,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:50:58,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-12 18:50:58,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-12 18:50:58,367 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-10-12 18:50:58,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:50:58,488 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2024-10-12 18:50:58,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 18:50:58,488 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2024-10-12 18:50:58,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:50:58,490 INFO L225 Difference]: With dead ends: 61 [2024-10-12 18:50:58,492 INFO L226 Difference]: Without dead ends: 59 [2024-10-12 18:50:58,492 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-10-12 18:50:58,493 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:50:58,493 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 150 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:50:58,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-12 18:50:58,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-10-12 18:50:58,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 33 states have (on average 1.121212121212121) internal successors, (37), 36 states have internal predecessors, (37), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-12 18:50:58,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2024-10-12 18:50:58,511 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 55 [2024-10-12 18:50:58,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:50:58,511 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2024-10-12 18:50:58,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-10-12 18:50:58,512 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2024-10-12 18:50:58,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-10-12 18:50:58,513 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:50:58,513 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 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] [2024-10-12 18:50:58,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-12 18:50:58,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:50:58,714 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:50:58,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:50:58,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1705825109, now seen corresponding path program 1 times [2024-10-12 18:50:58,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:50:58,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480085837] [2024-10-12 18:50:58,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:50:58,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:50:58,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:50:58,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569554964] [2024-10-12 18:50:58,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:50:58,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:50:58,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:50:58,737 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:50:58,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 18:50:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:58,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-12 18:50:58,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:50:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-12 18:50:58,882 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:50:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-12 18:50:58,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:50:58,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480085837] [2024-10-12 18:50:58,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:50:58,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569554964] [2024-10-12 18:50:58,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569554964] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:50:58,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:50:58,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-10-12 18:50:58,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012116291] [2024-10-12 18:50:58,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:50:58,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-12 18:50:58,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:50:58,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-12 18:50:58,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-12 18:50:58,979 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-10-12 18:50:59,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:50:59,088 INFO L93 Difference]: Finished difference Result 86 states and 117 transitions. [2024-10-12 18:50:59,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 18:50:59,088 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 62 [2024-10-12 18:50:59,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:50:59,089 INFO L225 Difference]: With dead ends: 86 [2024-10-12 18:50:59,089 INFO L226 Difference]: Without dead ends: 84 [2024-10-12 18:50:59,090 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-12 18:50:59,090 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:50:59,091 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 212 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:50:59,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-12 18:50:59,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2024-10-12 18:50:59,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-10-12 18:50:59,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-10-12 18:50:59,112 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 62 [2024-10-12 18:50:59,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:50:59,113 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-10-12 18:50:59,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-10-12 18:50:59,113 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-10-12 18:50:59,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-10-12 18:50:59,115 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:50:59,116 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:50:59,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-12 18:50:59,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:50:59,317 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:50:59,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:50:59,317 INFO L85 PathProgramCache]: Analyzing trace with hash 392643903, now seen corresponding path program 1 times [2024-10-12 18:50:59,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:50:59,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291835867] [2024-10-12 18:50:59,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:50:59,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:50:59,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:59,471 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:50:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:59,474 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 18:50:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:59,477 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-12 18:50:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:59,510 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-12 18:50:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:59,513 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-12 18:50:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:59,519 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-12 18:50:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:59,522 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-12 18:50:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:59,526 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-12 18:50:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:59,529 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-12 18:50:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:59,536 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-12 18:50:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-10-12 18:50:59,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:50:59,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291835867] [2024-10-12 18:50:59,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291835867] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:50:59,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100409188] [2024-10-12 18:50:59,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:50:59,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:50:59,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:50:59,544 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:50:59,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 18:50:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:50:59,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-12 18:50:59,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:50:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-10-12 18:50:59,642 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:50:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-10-12 18:50:59,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100409188] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:50:59,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:50:59,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-10-12 18:50:59,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9203571] [2024-10-12 18:50:59,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:50:59,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-12 18:50:59,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:50:59,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-12 18:50:59,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-12 18:50:59,746 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-12 18:50:59,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:50:59,920 INFO L93 Difference]: Finished difference Result 101 states and 141 transitions. [2024-10-12 18:50:59,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-12 18:50:59,921 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2024-10-12 18:50:59,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:50:59,923 INFO L225 Difference]: With dead ends: 101 [2024-10-12 18:50:59,925 INFO L226 Difference]: Without dead ends: 93 [2024-10-12 18:50:59,925 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 142 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-10-12 18:50:59,926 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 32 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:50:59,926 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 249 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:50:59,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-12 18:50:59,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2024-10-12 18:50:59,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-10-12 18:50:59,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2024-10-12 18:50:59,969 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 64 [2024-10-12 18:50:59,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:50:59,970 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2024-10-12 18:50:59,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-12 18:50:59,970 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2024-10-12 18:50:59,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-12 18:50:59,972 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:50:59,972 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:50:59,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-12 18:51:00,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:51:00,174 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:51:00,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:51:00,174 INFO L85 PathProgramCache]: Analyzing trace with hash -45785549, now seen corresponding path program 1 times [2024-10-12 18:51:00,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:51:00,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945464996] [2024-10-12 18:51:00,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:51:00,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:51:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:51:00,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433843737] [2024-10-12 18:51:00,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:51:00,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:51:00,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:51:00,204 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:51:00,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-12 18:51:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:00,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-12 18:51:00,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:51:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-10-12 18:51:00,393 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:51:00,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:51:00,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945464996] [2024-10-12 18:51:00,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:51:00,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433843737] [2024-10-12 18:51:00,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433843737] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:51:00,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 18:51:00,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2024-10-12 18:51:00,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329125810] [2024-10-12 18:51:00,433 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 18:51:00,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-12 18:51:00,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:51:00,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-12 18:51:00,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-12 18:51:00,435 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-12 18:51:00,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:51:00,552 INFO L93 Difference]: Finished difference Result 119 states and 168 transitions. [2024-10-12 18:51:00,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 18:51:00,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2024-10-12 18:51:00,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:51:00,555 INFO L225 Difference]: With dead ends: 119 [2024-10-12 18:51:00,555 INFO L226 Difference]: Without dead ends: 116 [2024-10-12 18:51:00,555 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-12 18:51:00,557 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:51:00,557 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 190 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:51:00,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-10-12 18:51:00,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2024-10-12 18:51:00,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 62 states have internal predecessors, (73), 45 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-10-12 18:51:00,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 161 transitions. [2024-10-12 18:51:00,589 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 161 transitions. Word has length 70 [2024-10-12 18:51:00,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:51:00,589 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 161 transitions. [2024-10-12 18:51:00,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-12 18:51:00,589 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 161 transitions. [2024-10-12 18:51:00,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-10-12 18:51:00,590 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:51:00,590 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:51:00,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-12 18:51:00,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:51:00,791 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:51:00,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:51:00,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1519552206, now seen corresponding path program 2 times [2024-10-12 18:51:00,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:51:00,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701180345] [2024-10-12 18:51:00,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:51:00,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:51:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:51:00,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170671367] [2024-10-12 18:51:00,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 18:51:00,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:51:00,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:51:00,813 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:51:00,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-12 18:51:00,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 18:51:00,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:51:00,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-12 18:51:00,884 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:51:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-10-12 18:51:01,084 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:51:01,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:51:01,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701180345] [2024-10-12 18:51:01,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:51:01,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170671367] [2024-10-12 18:51:01,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170671367] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:51:01,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 18:51:01,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-10-12 18:51:01,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525382327] [2024-10-12 18:51:01,127 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 18:51:01,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-12 18:51:01,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:51:01,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-12 18:51:01,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-12 18:51:01,129 INFO L87 Difference]: Start difference. First operand 113 states and 161 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-10-12 18:51:01,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:51:01,331 INFO L93 Difference]: Finished difference Result 125 states and 171 transitions. [2024-10-12 18:51:01,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 18:51:01,332 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2024-10-12 18:51:01,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:51:01,333 INFO L225 Difference]: With dead ends: 125 [2024-10-12 18:51:01,334 INFO L226 Difference]: Without dead ends: 123 [2024-10-12 18:51:01,334 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-12 18:51:01,335 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 12 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:51:01,335 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 207 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:51:01,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-10-12 18:51:01,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2024-10-12 18:51:01,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 66 states have (on average 1.196969696969697) internal successors, (79), 68 states have internal predecessors, (79), 45 states have call successors, (45), 9 states have call predecessors, (45), 9 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-10-12 18:51:01,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 167 transitions. [2024-10-12 18:51:01,369 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 167 transitions. Word has length 75 [2024-10-12 18:51:01,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:51:01,370 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 167 transitions. [2024-10-12 18:51:01,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-10-12 18:51:01,371 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 167 transitions. [2024-10-12 18:51:01,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-10-12 18:51:01,372 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:51:01,372 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:51:01,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-12 18:51:01,577 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,SelfDestructingSolverStorable8 [2024-10-12 18:51:01,578 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:51:01,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:51:01,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1881497901, now seen corresponding path program 3 times [2024-10-12 18:51:01,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:51:01,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686777665] [2024-10-12 18:51:01,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:51:01,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:51:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:51:01,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407611578] [2024-10-12 18:51:01,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 18:51:01,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:51:01,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:51:01,601 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:51:01,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-12 18:51:01,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-12 18:51:01,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:51:01,671 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-12 18:51:01,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:51:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 43 proven. 20 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2024-10-12 18:51:02,837 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:51:03,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:51:03,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686777665] [2024-10-12 18:51:03,189 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:51:03,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407611578] [2024-10-12 18:51:03,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407611578] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:51:03,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 18:51:03,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-12 18:51:03,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320242789] [2024-10-12 18:51:03,190 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 18:51:03,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-12 18:51:03,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:51:03,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-12 18:51:03,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-10-12 18:51:03,191 INFO L87 Difference]: Start difference. First operand 121 states and 167 transitions. Second operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2024-10-12 18:51:03,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:51:03,827 INFO L93 Difference]: Finished difference Result 133 states and 177 transitions. [2024-10-12 18:51:03,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-12 18:51:03,827 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2024-10-12 18:51:03,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:51:03,829 INFO L225 Difference]: With dead ends: 133 [2024-10-12 18:51:03,831 INFO L226 Difference]: Without dead ends: 131 [2024-10-12 18:51:03,836 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2024-10-12 18:51:03,837 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 38 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-12 18:51:03,837 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 242 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-12 18:51:03,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-10-12 18:51:03,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2024-10-12 18:51:03,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 74 states have internal predecessors, (85), 45 states have call successors, (45), 11 states have call predecessors, (45), 11 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-10-12 18:51:03,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 173 transitions. [2024-10-12 18:51:03,865 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 173 transitions. Word has length 80 [2024-10-12 18:51:03,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:51:03,866 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 173 transitions. [2024-10-12 18:51:03,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2024-10-12 18:51:03,866 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 173 transitions. [2024-10-12 18:51:03,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-10-12 18:51:03,867 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:51:03,867 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:51:03,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-12 18:51:04,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-12 18:51:04,072 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:51:04,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:51:04,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1305329662, now seen corresponding path program 1 times [2024-10-12 18:51:04,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:51:04,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396218382] [2024-10-12 18:51:04,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:51:04,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:51:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:51:04,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844320240] [2024-10-12 18:51:04,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:51:04,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:51:04,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:51:04,090 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:51:04,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-12 18:51:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:04,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-12 18:51:04,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:51:04,653 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-10-12 18:51:04,654 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:51:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-10-12 18:51:05,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:51:05,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396218382] [2024-10-12 18:51:05,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:51:05,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844320240] [2024-10-12 18:51:05,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844320240] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:51:05,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:51:05,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-10-12 18:51:05,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076760317] [2024-10-12 18:51:05,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:51:05,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-12 18:51:05,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:51:05,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-12 18:51:05,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-10-12 18:51:05,492 INFO L87 Difference]: Start difference. First operand 129 states and 173 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-10-12 18:51:08,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:51:08,121 INFO L93 Difference]: Finished difference Result 229 states and 336 transitions. [2024-10-12 18:51:08,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-12 18:51:08,121 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 86 [2024-10-12 18:51:08,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:51:08,124 INFO L225 Difference]: With dead ends: 229 [2024-10-12 18:51:08,124 INFO L226 Difference]: Without dead ends: 225 [2024-10-12 18:51:08,125 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-10-12 18:51:08,126 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 74 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-10-12 18:51:08,126 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 494 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-10-12 18:51:08,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-10-12 18:51:08,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2024-10-12 18:51:08,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 114 states have (on average 1.236842105263158) internal successors, (141), 117 states have internal predecessors, (141), 94 states have call successors, (94), 13 states have call predecessors, (94), 13 states have return successors, (92), 91 states have call predecessors, (92), 92 states have call successors, (92) [2024-10-12 18:51:08,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 327 transitions. [2024-10-12 18:51:08,214 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 327 transitions. Word has length 86 [2024-10-12 18:51:08,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:51:08,215 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 327 transitions. [2024-10-12 18:51:08,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-10-12 18:51:08,215 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 327 transitions. [2024-10-12 18:51:08,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-10-12 18:51:08,216 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:51:08,216 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:51:08,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-12 18:51:08,420 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,SelfDestructingSolverStorable10 [2024-10-12 18:51:08,421 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:51:08,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:51:08,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1470837899, now seen corresponding path program 4 times [2024-10-12 18:51:08,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:51:08,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789343190] [2024-10-12 18:51:08,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:51:08,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:51:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:08,529 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:51:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:08,531 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 18:51:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:08,534 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-12 18:51:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:08,536 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-12 18:51:08,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:08,538 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-12 18:51:08,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:08,540 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-12 18:51:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:08,542 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-12 18:51:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:08,544 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-12 18:51:08,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:08,547 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-12 18:51:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:08,549 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-12 18:51:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:08,551 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-12 18:51:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:08,553 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-10-12 18:51:08,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:08,557 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-10-12 18:51:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:08,560 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-12 18:51:08,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:08,563 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-10-12 18:51:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-10-12 18:51:08,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:51:08,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789343190] [2024-10-12 18:51:08,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789343190] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:51:08,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:51:08,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 18:51:08,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872480818] [2024-10-12 18:51:08,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:51:08,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 18:51:08,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:51:08,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 18:51:08,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 18:51:08,568 INFO L87 Difference]: Start difference. First operand 222 states and 327 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-10-12 18:51:08,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:51:08,683 INFO L93 Difference]: Finished difference Result 275 states and 403 transitions. [2024-10-12 18:51:08,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 18:51:08,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 95 [2024-10-12 18:51:08,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:51:08,686 INFO L225 Difference]: With dead ends: 275 [2024-10-12 18:51:08,686 INFO L226 Difference]: Without dead ends: 201 [2024-10-12 18:51:08,687 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-12 18:51:08,688 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:51:08,688 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 166 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:51:08,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-10-12 18:51:08,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 189. [2024-10-12 18:51:08,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 97 states have (on average 1.175257731958763) internal successors, (114), 100 states have internal predecessors, (114), 78 states have call successors, (78), 13 states have call predecessors, (78), 13 states have return successors, (76), 75 states have call predecessors, (76), 76 states have call successors, (76) [2024-10-12 18:51:08,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 268 transitions. [2024-10-12 18:51:08,765 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 268 transitions. Word has length 95 [2024-10-12 18:51:08,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:51:08,765 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 268 transitions. [2024-10-12 18:51:08,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-10-12 18:51:08,766 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 268 transitions. [2024-10-12 18:51:08,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-10-12 18:51:08,767 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:51:08,767 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 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, 1, 1, 1] [2024-10-12 18:51:08,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-12 18:51:08,767 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:51:08,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:51:08,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1556724626, now seen corresponding path program 1 times [2024-10-12 18:51:08,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:51:08,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464182791] [2024-10-12 18:51:08,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:51:08,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:51:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:51:08,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931341820] [2024-10-12 18:51:08,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:51:08,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:51:08,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:51:08,800 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:51:08,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-12 18:51:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:08,884 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-12 18:51:08,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:51:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 74 proven. 35 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2024-10-12 18:51:09,674 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:51:15,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:51:15,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464182791] [2024-10-12 18:51:15,392 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:51:15,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931341820] [2024-10-12 18:51:15,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931341820] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:51:15,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 18:51:15,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-12 18:51:15,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379768306] [2024-10-12 18:51:15,392 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 18:51:15,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-12 18:51:15,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:51:15,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-12 18:51:15,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2024-10-12 18:51:15,394 INFO L87 Difference]: Start difference. First operand 189 states and 268 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2024-10-12 18:51:15,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:51:15,966 INFO L93 Difference]: Finished difference Result 201 states and 278 transitions. [2024-10-12 18:51:15,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-12 18:51:15,966 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 102 [2024-10-12 18:51:15,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:51:15,968 INFO L225 Difference]: With dead ends: 201 [2024-10-12 18:51:15,968 INFO L226 Difference]: Without dead ends: 199 [2024-10-12 18:51:15,968 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2024-10-12 18:51:15,969 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 28 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 18:51:15,969 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 194 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 18:51:15,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-10-12 18:51:16,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2024-10-12 18:51:16,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 103 states have (on average 1.1650485436893203) internal successors, (120), 106 states have internal predecessors, (120), 78 states have call successors, (78), 15 states have call predecessors, (78), 15 states have return successors, (76), 75 states have call predecessors, (76), 76 states have call successors, (76) [2024-10-12 18:51:16,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 274 transitions. [2024-10-12 18:51:16,034 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 274 transitions. Word has length 102 [2024-10-12 18:51:16,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:51:16,034 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 274 transitions. [2024-10-12 18:51:16,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2024-10-12 18:51:16,035 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 274 transitions. [2024-10-12 18:51:16,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-10-12 18:51:16,036 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:51:16,036 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2024-10-12 18:51:16,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-12 18:51:16,240 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,SelfDestructingSolverStorable12 [2024-10-12 18:51:16,241 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:51:16,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:51:16,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1903041589, now seen corresponding path program 1 times [2024-10-12 18:51:16,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:51:16,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443083307] [2024-10-12 18:51:16,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:51:16,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:51:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:16,353 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 18:51:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:16,356 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 18:51:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:16,359 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-12 18:51:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:16,364 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-12 18:51:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:16,365 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-12 18:51:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:16,367 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-12 18:51:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:16,368 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-12 18:51:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:16,370 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-12 18:51:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:16,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-12 18:51:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:16,376 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-12 18:51:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:16,378 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-12 18:51:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:16,381 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-10-12 18:51:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:16,385 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-10-12 18:51:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:16,390 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-12 18:51:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:16,393 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-10-12 18:51:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:16,397 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-10-12 18:51:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:16,400 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-10-12 18:51:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:16,403 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-10-12 18:51:16,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:16,408 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-10-12 18:51:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-10-12 18:51:16,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:51:16,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443083307] [2024-10-12 18:51:16,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443083307] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:51:16,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46626620] [2024-10-12 18:51:16,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:51:16,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:51:16,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:51:16,413 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:51:16,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-12 18:51:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:51:16,486 INFO L255 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-12 18:51:16,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:51:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2024-10-12 18:51:16,521 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:51:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-10-12 18:51:16,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46626620] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:51:16,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:51:16,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-10-12 18:51:16,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971003786] [2024-10-12 18:51:16,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:51:16,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-12 18:51:16,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:51:16,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-12 18:51:16,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-12 18:51:16,607 INFO L87 Difference]: Start difference. First operand 197 states and 274 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2024-10-12 18:51:16,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:51:16,865 INFO L93 Difference]: Finished difference Result 223 states and 313 transitions. [2024-10-12 18:51:16,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-12 18:51:16,866 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 116 [2024-10-12 18:51:16,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:51:16,868 INFO L225 Difference]: With dead ends: 223 [2024-10-12 18:51:16,868 INFO L226 Difference]: Without dead ends: 211 [2024-10-12 18:51:16,868 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 267 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-10-12 18:51:16,868 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 17 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:51:16,869 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 318 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:51:16,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-10-12 18:51:16,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 192. [2024-10-12 18:51:16,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 100 states have (on average 1.16) internal successors, (116), 102 states have internal predecessors, (116), 77 states have call successors, (77), 14 states have call predecessors, (77), 14 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2024-10-12 18:51:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 268 transitions. [2024-10-12 18:51:16,924 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 268 transitions. Word has length 116 [2024-10-12 18:51:16,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:51:16,924 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 268 transitions. [2024-10-12 18:51:16,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2024-10-12 18:51:16,925 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 268 transitions. [2024-10-12 18:51:16,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-10-12 18:51:16,926 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:51:16,926 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:51:16,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-12 18:51:17,126 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,SelfDestructingSolverStorable13 [2024-10-12 18:51:17,127 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:51:17,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:51:17,127 INFO L85 PathProgramCache]: Analyzing trace with hash -956526070, now seen corresponding path program 2 times [2024-10-12 18:51:17,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:51:17,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285984429] [2024-10-12 18:51:17,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:51:17,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:51:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:51:17,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515824409] [2024-10-12 18:51:17,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 18:51:17,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:51:17,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:51:17,164 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:51:17,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-12 18:51:17,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 18:51:17,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:51:17,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-12 18:51:17,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:51:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 61 proven. 50 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2024-10-12 18:51:17,720 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:51:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2024-10-12 18:51:17,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:51:17,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285984429] [2024-10-12 18:51:17,927 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:51:17,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515824409] [2024-10-12 18:51:17,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515824409] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:51:17,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 18:51:17,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2024-10-12 18:51:17,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112576109] [2024-10-12 18:51:17,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 18:51:17,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-12 18:51:17,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:51:17,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-12 18:51:17,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2024-10-12 18:51:17,929 INFO L87 Difference]: Start difference. First operand 192 states and 268 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2024-10-12 18:51:19,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:51:19,886 INFO L93 Difference]: Finished difference Result 226 states and 314 transitions. [2024-10-12 18:51:19,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-12 18:51:19,887 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 117 [2024-10-12 18:51:19,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:51:19,892 INFO L225 Difference]: With dead ends: 226 [2024-10-12 18:51:19,892 INFO L226 Difference]: Without dead ends: 223 [2024-10-12 18:51:19,894 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2024-10-12 18:51:19,894 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 59 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-12 18:51:19,894 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 426 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-12 18:51:19,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-10-12 18:51:19,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 165. [2024-10-12 18:51:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 88 states have (on average 1.1590909090909092) internal successors, (102), 89 states have internal predecessors, (102), 63 states have call successors, (63), 13 states have call predecessors, (63), 13 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2024-10-12 18:51:19,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 227 transitions. [2024-10-12 18:51:19,961 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 227 transitions. Word has length 117 [2024-10-12 18:51:19,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:51:19,961 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 227 transitions. [2024-10-12 18:51:19,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2024-10-12 18:51:19,961 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 227 transitions. [2024-10-12 18:51:19,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-10-12 18:51:19,963 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:51:19,963 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:51:19,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-12 18:51:20,163 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,SelfDestructingSolverStorable14 [2024-10-12 18:51:20,163 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:51:20,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:51:20,164 INFO L85 PathProgramCache]: Analyzing trace with hash 457852880, now seen corresponding path program 3 times [2024-10-12 18:51:20,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:51:20,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677602053] [2024-10-12 18:51:20,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:51:20,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:51:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:51:20,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088046002] [2024-10-12 18:51:20,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 18:51:20,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:51:20,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:51:20,206 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:51:20,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-12 18:51:20,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-12 18:51:20,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:51:20,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-12 18:51:20,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:51:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-10-12 18:51:20,773 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:51:22,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:51:22,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677602053] [2024-10-12 18:51:22,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:51:22,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088046002] [2024-10-12 18:51:22,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088046002] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:51:22,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 18:51:22,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-10-12 18:51:22,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683110006] [2024-10-12 18:51:22,920 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 18:51:22,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-12 18:51:22,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:51:22,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-12 18:51:22,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2024-10-12 18:51:22,921 INFO L87 Difference]: Start difference. First operand 165 states and 227 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2024-10-12 18:51:23,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:51:23,235 INFO L93 Difference]: Finished difference Result 203 states and 276 transitions. [2024-10-12 18:51:23,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-12 18:51:23,235 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) Word has length 119 [2024-10-12 18:51:23,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:51:23,237 INFO L225 Difference]: With dead ends: 203 [2024-10-12 18:51:23,237 INFO L226 Difference]: Without dead ends: 201 [2024-10-12 18:51:23,238 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2024-10-12 18:51:23,238 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 22 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 18:51:23,238 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 359 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 18:51:23,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-10-12 18:51:23,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2024-10-12 18:51:23,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 106 states have (on average 1.150943396226415) internal successors, (122), 107 states have internal predecessors, (122), 75 states have call successors, (75), 16 states have call predecessors, (75), 16 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2024-10-12 18:51:23,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 271 transitions. [2024-10-12 18:51:23,306 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 271 transitions. Word has length 119 [2024-10-12 18:51:23,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:51:23,307 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 271 transitions. [2024-10-12 18:51:23,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2024-10-12 18:51:23,307 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 271 transitions. [2024-10-12 18:51:23,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-10-12 18:51:23,308 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:51:23,308 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:51:23,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-12 18:51:23,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:51:23,513 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:51:23,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:51:23,513 INFO L85 PathProgramCache]: Analyzing trace with hash -2126175913, now seen corresponding path program 4 times [2024-10-12 18:51:23,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:51:23,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376910516] [2024-10-12 18:51:23,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:51:23,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:51:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:51:23,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866227254] [2024-10-12 18:51:23,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 18:51:23,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:51:23,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:51:23,537 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:51:23,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-12 18:51:23,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 18:51:23,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:51:23,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-12 18:51:23,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:51:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 57 proven. 47 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-10-12 18:51:24,352 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:51:26,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:51:26,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376910516] [2024-10-12 18:51:26,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:51:26,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866227254] [2024-10-12 18:51:26,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866227254] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:51:26,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 18:51:26,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-10-12 18:51:26,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19028704] [2024-10-12 18:51:26,456 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 18:51:26,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-12 18:51:26,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:51:26,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-12 18:51:26,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-10-12 18:51:26,457 INFO L87 Difference]: Start difference. First operand 198 states and 271 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-10-12 18:51:27,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:51:27,370 INFO L93 Difference]: Finished difference Result 261 states and 358 transitions. [2024-10-12 18:51:27,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-12 18:51:27,371 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 122 [2024-10-12 18:51:27,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:51:27,372 INFO L225 Difference]: With dead ends: 261 [2024-10-12 18:51:27,372 INFO L226 Difference]: Without dead ends: 259 [2024-10-12 18:51:27,372 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2024-10-12 18:51:27,373 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 24 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 18:51:27,373 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 467 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 18:51:27,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-10-12 18:51:27,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 256. [2024-10-12 18:51:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 136 states have (on average 1.1470588235294117) internal successors, (156), 137 states have internal predecessors, (156), 99 states have call successors, (99), 20 states have call predecessors, (99), 20 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2024-10-12 18:51:27,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 353 transitions. [2024-10-12 18:51:27,462 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 353 transitions. Word has length 122 [2024-10-12 18:51:27,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:51:27,462 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 353 transitions. [2024-10-12 18:51:27,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-10-12 18:51:27,462 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 353 transitions. [2024-10-12 18:51:27,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-10-12 18:51:27,464 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:51:27,464 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:51:27,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-12 18:51:27,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-12 18:51:27,664 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:51:27,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:51:27,665 INFO L85 PathProgramCache]: Analyzing trace with hash 71118609, now seen corresponding path program 5 times [2024-10-12 18:51:27,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:51:27,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978738942] [2024-10-12 18:51:27,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:51:27,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:51:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:51:27,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134581657] [2024-10-12 18:51:27,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 18:51:27,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:51:27,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:51:27,688 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) [2024-10-12 18:51:27,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-12 18:51:27,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-10-12 18:51:27,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:51:27,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-10-12 18:51:27,820 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:51:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 76 proven. 67 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2024-10-12 18:51:28,544 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:51:55,441 WARN L286 SmtUtils]: Spent 8.46s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)