./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/hard-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/hard-ll.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8c31bebbbf1ab8c6e57b91fec88eba145fb9c1b52fce25f48cae26620a3d8ba6 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-09 22:26:16,812 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 22:26:16,878 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-09 22:26:16,895 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 22:26:16,900 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 22:26:16,943 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 22:26:16,944 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 22:26:16,944 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 22:26:16,945 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 22:26:16,950 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 22:26:16,951 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 22:26:16,951 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 22:26:16,951 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 22:26:16,952 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 22:26:16,952 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 22:26:16,952 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 22:26:16,952 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 22:26:16,953 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 22:26:16,953 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 22:26:16,953 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 22:26:16,953 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 22:26:16,958 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 22:26:16,959 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 22:26:16,959 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 22:26:16,959 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 22:26:16,959 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 22:26:16,959 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 22:26:16,960 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 22:26:16,960 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-09 22:26:16,960 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 22:26:16,961 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 22:26:16,961 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 22:26:16,961 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 22:26:16,962 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 22:26:16,962 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 22:26:16,962 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 22:26:16,962 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 22:26:16,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 22:26:16,963 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 22:26:16,963 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 22:26:16,963 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 22:26:16,963 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 22:26:16,963 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c31bebbbf1ab8c6e57b91fec88eba145fb9c1b52fce25f48cae26620a3d8ba6 [2024-11-09 22:26:17,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 22:26:17,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 22:26:17,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 22:26:17,239 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 22:26:17,239 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 22:26:17,241 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/hard-ll.c [2024-11-09 22:26:18,646 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 22:26:18,817 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 22:26:18,818 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard-ll.c [2024-11-09 22:26:18,824 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d84a8a8f/03515989d5354d7790237cd20a1b7fbc/FLAGec7ed7cec [2024-11-09 22:26:18,837 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d84a8a8f/03515989d5354d7790237cd20a1b7fbc [2024-11-09 22:26:18,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 22:26:18,840 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 22:26:18,842 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 22:26:18,842 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 22:26:18,847 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 22:26:18,847 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:26:18" (1/1) ... [2024-11-09 22:26:18,848 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53eb6c24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:26:18, skipping insertion in model container [2024-11-09 22:26:18,849 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:26:18" (1/1) ... [2024-11-09 22:26:18,868 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 22:26:19,028 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard-ll.c[538,551] [2024-11-09 22:26:19,051 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 22:26:19,059 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 22:26:19,069 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard-ll.c[538,551] [2024-11-09 22:26:19,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 22:26:19,109 INFO L204 MainTranslator]: Completed translation [2024-11-09 22:26:19,112 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:26:19 WrapperNode [2024-11-09 22:26:19,113 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 22:26:19,114 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 22:26:19,114 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 22:26:19,114 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 22:26:19,121 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:26:19" (1/1) ... [2024-11-09 22:26:19,126 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:26:19" (1/1) ... [2024-11-09 22:26:19,160 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2024-11-09 22:26:19,161 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 22:26:19,162 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 22:26:19,162 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 22:26:19,162 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 22:26:19,171 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:26:19" (1/1) ... [2024-11-09 22:26:19,171 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:26:19" (1/1) ... [2024-11-09 22:26:19,173 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:26:19" (1/1) ... [2024-11-09 22:26:19,184 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-09 22:26:19,185 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:26:19" (1/1) ... [2024-11-09 22:26:19,188 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:26:19" (1/1) ... [2024-11-09 22:26:19,192 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:26:19" (1/1) ... [2024-11-09 22:26:19,192 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:26:19" (1/1) ... [2024-11-09 22:26:19,193 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:26:19" (1/1) ... [2024-11-09 22:26:19,199 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:26:19" (1/1) ... [2024-11-09 22:26:19,200 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 22:26:19,202 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-09 22:26:19,203 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-09 22:26:19,203 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-09 22:26:19,204 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:26:19" (1/1) ... [2024-11-09 22:26:19,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 22:26:19,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:26:19,242 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 22:26:19,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 22:26:19,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 22:26:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 22:26:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 22:26:19,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 22:26:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 22:26:19,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 22:26:19,356 INFO L256 CfgBuilder]: Building ICFG [2024-11-09 22:26:19,358 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 22:26:19,559 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-09 22:26:19,560 INFO L307 CfgBuilder]: Performing block encoding [2024-11-09 22:26:19,573 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 22:26:19,575 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 22:26:19,575 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 10:26:19 BoogieIcfgContainer [2024-11-09 22:26:19,575 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-09 22:26:19,577 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 22:26:19,577 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 22:26:19,581 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 22:26:19,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:26:18" (1/3) ... [2024-11-09 22:26:19,583 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f748477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:26:19, skipping insertion in model container [2024-11-09 22:26:19,583 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:26:19" (2/3) ... [2024-11-09 22:26:19,584 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f748477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:26:19, skipping insertion in model container [2024-11-09 22:26:19,584 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 10:26:19" (3/3) ... [2024-11-09 22:26:19,586 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll.c [2024-11-09 22:26:19,604 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 22:26:19,604 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 22:26:19,675 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 22:26:19,681 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;@32164dfd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 22:26:19,682 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 22:26:19,685 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 22:26:19,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 22:26:19,692 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:26:19,692 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:26:19,692 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:26:19,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:26:19,696 INFO L85 PathProgramCache]: Analyzing trace with hash -292126860, now seen corresponding path program 1 times [2024-11-09 22:26:19,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:26:19,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975258364] [2024-11-09 22:26:19,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:26:19,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:26:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 22:26:19,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:26:19,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975258364] [2024-11-09 22:26:19,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975258364] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:26:19,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:26:19,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 22:26:19,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263064152] [2024-11-09 22:26:19,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:26:19,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 22:26:19,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:26:19,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 22:26:19,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 22:26:19,856 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:26:19,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:26:19,872 INFO L93 Difference]: Finished difference Result 55 states and 89 transitions. [2024-11-09 22:26:19,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 22:26:19,873 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-09 22:26:19,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:26:19,879 INFO L225 Difference]: With dead ends: 55 [2024-11-09 22:26:19,879 INFO L226 Difference]: Without dead ends: 25 [2024-11-09 22:26:19,882 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 22:26:19,885 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:26:19,886 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:26:19,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-09 22:26:19,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-09 22:26:19,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 22:26:19,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2024-11-09 22:26:19,915 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 11 [2024-11-09 22:26:19,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:26:19,915 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2024-11-09 22:26:19,916 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:26:19,916 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2024-11-09 22:26:19,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 22:26:19,917 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:26:19,917 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:26:19,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 22:26:19,917 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:26:19,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:26:19,918 INFO L85 PathProgramCache]: Analyzing trace with hash -2099581323, now seen corresponding path program 1 times [2024-11-09 22:26:19,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:26:19,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242029177] [2024-11-09 22:26:19,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:26:19,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:26:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 22:26:20,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:26:20,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242029177] [2024-11-09 22:26:20,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242029177] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:26:20,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:26:20,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 22:26:20,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909400856] [2024-11-09 22:26:20,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:26:20,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:26:20,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:26:20,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:26:20,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:26:20,105 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:26:20,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:26:20,193 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2024-11-09 22:26:20,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:26:20,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-09 22:26:20,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:26:20,195 INFO L225 Difference]: With dead ends: 40 [2024-11-09 22:26:20,195 INFO L226 Difference]: Without dead ends: 37 [2024-11-09 22:26:20,195 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:26:20,196 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:26:20,197 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 101 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:26:20,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-09 22:26:20,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2024-11-09 22:26:20,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 22:26:20,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-11-09 22:26:20,214 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 11 [2024-11-09 22:26:20,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:26:20,214 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-11-09 22:26:20,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:26:20,215 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-11-09 22:26:20,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-09 22:26:20,216 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:26:20,216 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:26:20,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 22:26:20,217 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:26:20,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:26:20,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2100820203, now seen corresponding path program 1 times [2024-11-09 22:26:20,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:26:20,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692055934] [2024-11-09 22:26:20,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:26:20,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:26:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:20,397 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-09 22:26:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 22:26:20,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:26:20,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692055934] [2024-11-09 22:26:20,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692055934] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:26:20,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:26:20,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 22:26:20,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945399157] [2024-11-09 22:26:20,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:26:20,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:26:20,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:26:20,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:26:20,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:26:20,416 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 22:26:20,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:26:20,490 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2024-11-09 22:26:20,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:26:20,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-11-09 22:26:20,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:26:20,492 INFO L225 Difference]: With dead ends: 44 [2024-11-09 22:26:20,492 INFO L226 Difference]: Without dead ends: 41 [2024-11-09 22:26:20,493 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:26:20,494 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:26:20,496 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 98 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:26:20,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-09 22:26:20,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2024-11-09 22:26:20,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 22:26:20,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2024-11-09 22:26:20,511 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 16 [2024-11-09 22:26:20,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:26:20,511 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2024-11-09 22:26:20,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 22:26:20,512 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2024-11-09 22:26:20,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 22:26:20,513 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:26:20,513 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:26:20,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 22:26:20,513 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:26:20,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:26:20,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1262954485, now seen corresponding path program 1 times [2024-11-09 22:26:20,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:26:20,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743999375] [2024-11-09 22:26:20,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:26:20,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:26:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:26:20,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814483560] [2024-11-09 22:26:20,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:26:20,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:26:20,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:26:20,542 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:26:20,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 22:26:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:20,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 22:26:20,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:26:20,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 22:26:20,747 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 22:26:20,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:26:20,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743999375] [2024-11-09 22:26:20,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:26:20,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814483560] [2024-11-09 22:26:20,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814483560] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:26:20,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:26:20,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 22:26:20,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104976749] [2024-11-09 22:26:20,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:26:20,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:26:20,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:26:20,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:26:20,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:26:20,764 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 22:26:20,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:26:20,854 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2024-11-09 22:26:20,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:26:20,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-11-09 22:26:20,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:26:20,855 INFO L225 Difference]: With dead ends: 63 [2024-11-09 22:26:20,856 INFO L226 Difference]: Without dead ends: 48 [2024-11-09 22:26:20,856 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:26:20,857 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:26:20,857 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 101 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:26:20,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-09 22:26:20,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-09 22:26:20,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-09 22:26:20,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2024-11-09 22:26:20,874 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 21 [2024-11-09 22:26:20,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:26:20,875 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2024-11-09 22:26:20,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 22:26:20,875 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2024-11-09 22:26:20,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 22:26:20,876 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:26:20,876 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:26:20,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 22:26:21,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:26:21,077 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:26:21,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:26:21,078 INFO L85 PathProgramCache]: Analyzing trace with hash -23433476, now seen corresponding path program 1 times [2024-11-09 22:26:21,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:26:21,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536444070] [2024-11-09 22:26:21,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:26:21,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:26:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:26:21,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049155321] [2024-11-09 22:26:21,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:26:21,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:26:21,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:26:21,115 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:26:21,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 22:26:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:21,177 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 22:26:21,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:26:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 22:26:21,289 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 22:26:21,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:26:21,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536444070] [2024-11-09 22:26:21,290 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:26:21,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049155321] [2024-11-09 22:26:21,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049155321] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:26:21,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:26:21,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 22:26:21,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450741581] [2024-11-09 22:26:21,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:26:21,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:26:21,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:26:21,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:26:21,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:26:21,293 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 22:26:21,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:26:21,357 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2024-11-09 22:26:21,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:26:21,358 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2024-11-09 22:26:21,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:26:21,359 INFO L225 Difference]: With dead ends: 63 [2024-11-09 22:26:21,359 INFO L226 Difference]: Without dead ends: 60 [2024-11-09 22:26:21,359 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:26:21,360 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:26:21,361 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 82 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:26:21,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-09 22:26:21,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-11-09 22:26:21,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-09 22:26:21,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2024-11-09 22:26:21,377 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 29 [2024-11-09 22:26:21,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:26:21,378 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2024-11-09 22:26:21,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 22:26:21,378 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2024-11-09 22:26:21,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 22:26:21,379 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:26:21,379 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:26:21,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 22:26:21,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:26:21,588 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:26:21,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:26:21,589 INFO L85 PathProgramCache]: Analyzing trace with hash 253378592, now seen corresponding path program 1 times [2024-11-09 22:26:21,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:26:21,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471164019] [2024-11-09 22:26:21,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:26:21,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:26:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:26:21,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355141294] [2024-11-09 22:26:21,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:26:21,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:26:21,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:26:21,628 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:26:21,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 22:26:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:21,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 22:26:21,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:26:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 22:26:21,829 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:26:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 22:26:21,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:26:21,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471164019] [2024-11-09 22:26:21,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:26:21,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355141294] [2024-11-09 22:26:21,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355141294] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 22:26:21,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 22:26:21,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-09 22:26:21,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190967649] [2024-11-09 22:26:21,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:26:21,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:26:21,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:26:21,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:26:21,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 22:26:21,946 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 22:26:23,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 22:26:23,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:26:23,400 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2024-11-09 22:26:23,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:26:23,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2024-11-09 22:26:23,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:26:23,403 INFO L225 Difference]: With dead ends: 71 [2024-11-09 22:26:23,403 INFO L226 Difference]: Without dead ends: 68 [2024-11-09 22:26:23,403 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-09 22:26:23,404 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 22:26:23,405 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 93 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 22:26:23,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-09 22:26:23,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2024-11-09 22:26:23,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 46 states have internal predecessors, (50), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-09 22:26:23,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2024-11-09 22:26:23,418 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 39 [2024-11-09 22:26:23,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:26:23,418 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2024-11-09 22:26:23,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 22:26:23,419 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2024-11-09 22:26:23,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 22:26:23,420 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:26:23,420 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:26:23,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 22:26:23,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:26:23,625 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:26:23,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:26:23,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1361005644, now seen corresponding path program 1 times [2024-11-09 22:26:23,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:26:23,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674623565] [2024-11-09 22:26:23,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:26:23,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:26:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:23,781 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-09 22:26:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:23,788 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-09 22:26:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:23,796 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 22:26:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:23,802 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-09 22:26:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:23,807 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 22:26:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:23,812 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-09 22:26:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-09 22:26:23,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:26:23,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674623565] [2024-11-09 22:26:23,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674623565] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:26:23,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:26:23,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 22:26:23,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461483109] [2024-11-09 22:26:23,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:26:23,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:26:23,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:26:23,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:26:23,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:26:23,820 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 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) [2024-11-09 22:26:23,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:26:23,885 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2024-11-09 22:26:23,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:26:23,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 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 45 [2024-11-09 22:26:23,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:26:23,888 INFO L225 Difference]: With dead ends: 76 [2024-11-09 22:26:23,888 INFO L226 Difference]: Without dead ends: 62 [2024-11-09 22:26:23,888 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:26:23,889 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 3 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:26:23,889 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 111 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:26:23,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-09 22:26:23,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-11-09 22:26:23,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.15) internal successors, (46), 43 states have internal predecessors, (46), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-09 22:26:23,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2024-11-09 22:26:23,913 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 45 [2024-11-09 22:26:23,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:26:23,914 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2024-11-09 22:26:23,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 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) [2024-11-09 22:26:23,914 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2024-11-09 22:26:23,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 22:26:23,915 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:26:23,915 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:26:23,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 22:26:23,915 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:26:23,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:26:23,916 INFO L85 PathProgramCache]: Analyzing trace with hash -646613615, now seen corresponding path program 1 times [2024-11-09 22:26:23,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:26:23,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817032015] [2024-11-09 22:26:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:26:23,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:26:23,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:26:23,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407703376] [2024-11-09 22:26:23,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:26:23,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:26:23,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:26:23,973 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:26:23,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 22:26:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:24,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-09 22:26:24,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:26:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-09 22:26:24,750 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:26:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-09 22:26:26,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:26:26,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817032015] [2024-11-09 22:26:26,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:26:26,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407703376] [2024-11-09 22:26:26,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407703376] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:26:26,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 22:26:26,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2024-11-09 22:26:26,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172659937] [2024-11-09 22:26:26,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 22:26:26,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 22:26:26,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:26:26,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 22:26:27,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-11-09 22:26:27,000 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-09 22:26:28,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:26:28,209 INFO L93 Difference]: Finished difference Result 161 states and 216 transitions. [2024-11-09 22:26:28,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 22:26:28,210 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 61 [2024-11-09 22:26:28,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:26:28,212 INFO L225 Difference]: With dead ends: 161 [2024-11-09 22:26:28,212 INFO L226 Difference]: Without dead ends: 135 [2024-11-09 22:26:28,213 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2024-11-09 22:26:28,214 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 80 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 22:26:28,214 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 286 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 22:26:28,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-09 22:26:28,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2024-11-09 22:26:28,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 73 states have internal predecessors, (80), 26 states have call successors, (26), 10 states have call predecessors, (26), 10 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-09 22:26:28,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 131 transitions. [2024-11-09 22:26:28,245 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 131 transitions. Word has length 61 [2024-11-09 22:26:28,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:26:28,246 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 131 transitions. [2024-11-09 22:26:28,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-09 22:26:28,246 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 131 transitions. [2024-11-09 22:26:28,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-09 22:26:28,247 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:26:28,247 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:26:28,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 22:26:28,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:26:28,448 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:26:28,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:26:28,449 INFO L85 PathProgramCache]: Analyzing trace with hash -641848553, now seen corresponding path program 1 times [2024-11-09 22:26:28,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:26:28,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815036914] [2024-11-09 22:26:28,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:26:28,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:26:28,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:26:28,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830217308] [2024-11-09 22:26:28,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:26:28,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:26:28,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:26:28,482 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:26:28,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 22:26:28,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:28,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 22:26:28,547 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:26:29,065 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-09 22:26:29,065 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:26:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-09 22:26:29,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:26:29,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815036914] [2024-11-09 22:26:29,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:26:29,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830217308] [2024-11-09 22:26:29,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830217308] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:26:29,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 22:26:29,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2024-11-09 22:26:29,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632325874] [2024-11-09 22:26:29,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 22:26:29,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 22:26:29,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:26:29,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 22:26:29,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-11-09 22:26:29,769 INFO L87 Difference]: Start difference. First operand 106 states and 131 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-09 22:26:30,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:26:30,219 INFO L93 Difference]: Finished difference Result 149 states and 182 transitions. [2024-11-09 22:26:30,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 22:26:30,220 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 72 [2024-11-09 22:26:30,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:26:30,221 INFO L225 Difference]: With dead ends: 149 [2024-11-09 22:26:30,221 INFO L226 Difference]: Without dead ends: 111 [2024-11-09 22:26:30,222 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2024-11-09 22:26:30,222 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 30 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 22:26:30,223 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 306 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 22:26:30,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-09 22:26:30,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2024-11-09 22:26:30,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 65 states have internal predecessors, (72), 22 states have call successors, (22), 10 states have call predecessors, (22), 10 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-09 22:26:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 115 transitions. [2024-11-09 22:26:30,246 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 115 transitions. Word has length 72 [2024-11-09 22:26:30,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:26:30,247 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 115 transitions. [2024-11-09 22:26:30,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-09 22:26:30,247 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 115 transitions. [2024-11-09 22:26:30,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-09 22:26:30,249 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:26:30,249 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:26:30,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 22:26:30,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:26:30,453 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:26:30,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:26:30,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1711473285, now seen corresponding path program 2 times [2024-11-09 22:26:30,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:26:30,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703546475] [2024-11-09 22:26:30,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:26:30,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:26:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:30,650 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-09 22:26:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:30,653 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-09 22:26:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:30,656 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 22:26:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:30,660 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-09 22:26:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:30,662 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 22:26:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:30,665 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-09 22:26:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:30,668 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-09 22:26:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:30,672 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 22:26:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:30,675 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-11-09 22:26:30,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:30,680 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-11-09 22:26:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-09 22:26:30,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:26:30,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703546475] [2024-11-09 22:26:30,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703546475] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:26:30,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086484929] [2024-11-09 22:26:30,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 22:26:30,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:26:30,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:26:30,687 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:26:30,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 22:26:30,741 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 22:26:30,742 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:26:30,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 22:26:30,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:26:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-09 22:26:30,776 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:26:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-09 22:26:30,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086484929] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:26:30,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:26:30,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-11-09 22:26:30,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904401127] [2024-11-09 22:26:30,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:26:30,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:26:30,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:26:30,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:26:30,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:26:30,872 INFO L87 Difference]: Start difference. First operand 96 states and 115 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 22:26:30,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:26:30,931 INFO L93 Difference]: Finished difference Result 127 states and 156 transitions. [2024-11-09 22:26:30,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 22:26:30,932 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 4 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 75 [2024-11-09 22:26:30,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:26:30,933 INFO L225 Difference]: With dead ends: 127 [2024-11-09 22:26:30,933 INFO L226 Difference]: Without dead ends: 102 [2024-11-09 22:26:30,933 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:26:30,934 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:26:30,934 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 128 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:26:30,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-09 22:26:30,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-11-09 22:26:30,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 69 states have internal predecessors, (76), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-09 22:26:30,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 123 transitions. [2024-11-09 22:26:30,956 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 123 transitions. Word has length 75 [2024-11-09 22:26:30,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:26:30,957 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 123 transitions. [2024-11-09 22:26:30,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 22:26:30,957 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 123 transitions. [2024-11-09 22:26:30,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-09 22:26:30,958 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:26:30,958 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:26:30,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 22:26:31,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:26:31,159 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:26:31,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:26:31,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1640886345, now seen corresponding path program 1 times [2024-11-09 22:26:31,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:26:31,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225323580] [2024-11-09 22:26:31,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:26:31,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:26:31,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:31,387 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-09 22:26:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:31,391 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-09 22:26:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:31,394 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 22:26:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:31,399 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-09 22:26:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:31,406 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 22:26:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:31,411 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-09 22:26:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:31,419 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-09 22:26:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:31,427 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 22:26:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:31,431 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-11-09 22:26:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:31,436 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-11-09 22:26:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:31,443 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-11-09 22:26:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:31,450 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-09 22:26:31,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:26:31,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225323580] [2024-11-09 22:26:31,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225323580] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:26:31,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427825131] [2024-11-09 22:26:31,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:26:31,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:26:31,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:26:31,453 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:26:31,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 22:26:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:31,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 22:26:31,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:26:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-09 22:26:31,856 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:26:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-09 22:26:32,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427825131] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:26:32,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:26:32,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 17 [2024-11-09 22:26:32,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289715262] [2024-11-09 22:26:32,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:26:32,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 22:26:32,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:26:32,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 22:26:32,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-11-09 22:26:32,283 INFO L87 Difference]: Start difference. First operand 102 states and 123 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 15 states have internal predecessors, (50), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2024-11-09 22:26:32,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:26:32,622 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2024-11-09 22:26:32,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 22:26:32,622 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 15 states have internal predecessors, (50), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 77 [2024-11-09 22:26:32,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:26:32,624 INFO L225 Difference]: With dead ends: 119 [2024-11-09 22:26:32,624 INFO L226 Difference]: Without dead ends: 99 [2024-11-09 22:26:32,624 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-11-09 22:26:32,625 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 35 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 22:26:32,625 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 356 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 22:26:32,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-09 22:26:32,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2024-11-09 22:26:32,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 62 states have internal predecessors, (68), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-09 22:26:32,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2024-11-09 22:26:32,651 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 77 [2024-11-09 22:26:32,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:26:32,652 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2024-11-09 22:26:32,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 15 states have internal predecessors, (50), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2024-11-09 22:26:32,653 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2024-11-09 22:26:32,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 22:26:32,654 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:26:32,654 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:26:32,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 22:26:32,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:26:32,855 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:26:32,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:26:32,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1787073206, now seen corresponding path program 1 times [2024-11-09 22:26:32,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:26:32,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610418236] [2024-11-09 22:26:32,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:26:32,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:26:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:32,931 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-09 22:26:32,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:32,935 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-09 22:26:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:32,940 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 22:26:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:32,944 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-09 22:26:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:32,947 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 22:26:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:32,951 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-09 22:26:32,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:32,955 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-09 22:26:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:32,959 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 22:26:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:32,962 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-09 22:26:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:32,969 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-09 22:26:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:32,976 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-09 22:26:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:32,983 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-11-09 22:26:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-11-09 22:26:32,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:26:32,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610418236] [2024-11-09 22:26:32,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610418236] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:26:32,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596449310] [2024-11-09 22:26:32,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:26:32,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:26:32,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:26:32,991 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:26:32,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 22:26:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:33,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 22:26:33,047 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:26:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-11-09 22:26:33,091 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 22:26:33,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596449310] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:26:33,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 22:26:33,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-11-09 22:26:33,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321299899] [2024-11-09 22:26:33,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:26:33,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:26:33,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:26:33,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:26:33,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:26:33,094 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-09 22:26:33,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:26:33,155 INFO L93 Difference]: Finished difference Result 99 states and 114 transitions. [2024-11-09 22:26:33,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:26:33,156 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), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 81 [2024-11-09 22:26:33,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:26:33,158 INFO L225 Difference]: With dead ends: 99 [2024-11-09 22:26:33,158 INFO L226 Difference]: Without dead ends: 86 [2024-11-09 22:26:33,158 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:26:33,160 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 7 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:26:33,161 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 98 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:26:33,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-09 22:26:33,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-11-09 22:26:33,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 57 states have (on average 1.105263157894737) internal successors, (63), 58 states have internal predecessors, (63), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-09 22:26:33,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2024-11-09 22:26:33,185 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 81 [2024-11-09 22:26:33,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:26:33,185 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2024-11-09 22:26:33,186 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), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-09 22:26:33,186 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2024-11-09 22:26:33,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-09 22:26:33,187 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:26:33,187 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:26:33,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 22:26:33,387 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,SelfDestructingSolverStorable11 [2024-11-09 22:26:33,388 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:26:33,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:26:33,389 INFO L85 PathProgramCache]: Analyzing trace with hash 985163622, now seen corresponding path program 3 times [2024-11-09 22:26:33,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:26:33,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567340533] [2024-11-09 22:26:33,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:26:33,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:26:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:26:33,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468893706] [2024-11-09 22:26:33,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 22:26:33,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:26:33,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:26:33,431 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:26:33,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 22:26:33,493 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 22:26:33,494 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:26:33,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 22:26:33,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:26:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-09 22:26:34,237 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:26:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-09 22:26:49,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:26:49,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567340533] [2024-11-09 22:26:49,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:26:49,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468893706] [2024-11-09 22:26:49,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468893706] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:26:49,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 22:26:49,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2024-11-09 22:26:49,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722914800] [2024-11-09 22:26:49,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 22:26:49,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 22:26:49,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:26:49,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 22:26:49,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-11-09 22:26:49,301 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-09 22:26:56,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:26:56,147 INFO L93 Difference]: Finished difference Result 172 states and 217 transitions. [2024-11-09 22:26:56,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 22:26:56,148 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 93 [2024-11-09 22:26:56,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:26:56,150 INFO L225 Difference]: With dead ends: 172 [2024-11-09 22:26:56,150 INFO L226 Difference]: Without dead ends: 147 [2024-11-09 22:26:56,151 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2024-11-09 22:26:56,151 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 82 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-09 22:26:56,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 559 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-09 22:26:56,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-09 22:26:56,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 133. [2024-11-09 22:26:56,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 87 states have (on average 1.103448275862069) internal successors, (96), 91 states have internal predecessors, (96), 33 states have call successors, (33), 12 states have call predecessors, (33), 12 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-09 22:26:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 161 transitions. [2024-11-09 22:26:56,187 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 161 transitions. Word has length 93 [2024-11-09 22:26:56,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:26:56,187 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 161 transitions. [2024-11-09 22:26:56,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-09 22:26:56,187 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 161 transitions. [2024-11-09 22:26:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-09 22:26:56,188 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:26:56,188 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:26:56,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 22:26:56,389 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,SelfDestructingSolverStorable12 [2024-11-09 22:26:56,389 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:26:56,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:26:56,390 INFO L85 PathProgramCache]: Analyzing trace with hash 515453474, now seen corresponding path program 2 times [2024-11-09 22:26:56,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:26:56,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589469230] [2024-11-09 22:26:56,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:26:56,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:26:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:26:56,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952738428] [2024-11-09 22:26:56,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 22:26:56,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:26:56,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:26:56,437 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:26:56,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 22:26:56,515 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 22:26:56,515 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:26:56,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-09 22:26:56,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:26:57,259 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 67 proven. 75 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2024-11-09 22:26:57,259 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:26:58,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:26:58,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589469230] [2024-11-09 22:26:58,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:26:58,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952738428] [2024-11-09 22:26:58,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952738428] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:26:58,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 22:26:58,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-09 22:26:58,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683806854] [2024-11-09 22:26:58,096 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 22:26:58,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 22:26:58,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:26:58,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 22:26:58,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2024-11-09 22:26:58,097 INFO L87 Difference]: Start difference. First operand 133 states and 161 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-11-09 22:26:58,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:26:58,527 INFO L93 Difference]: Finished difference Result 178 states and 211 transitions. [2024-11-09 22:26:58,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 22:26:58,528 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 104 [2024-11-09 22:26:58,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:26:58,530 INFO L225 Difference]: With dead ends: 178 [2024-11-09 22:26:58,530 INFO L226 Difference]: Without dead ends: 156 [2024-11-09 22:26:58,531 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2024-11-09 22:26:58,531 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 22:26:58,532 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 514 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 22:26:58,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-09 22:26:58,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2024-11-09 22:26:58,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 102 states have (on average 1.088235294117647) internal successors, (111), 107 states have internal predecessors, (111), 36 states have call successors, (36), 16 states have call predecessors, (36), 16 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2024-11-09 22:26:58,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 182 transitions. [2024-11-09 22:26:58,587 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 182 transitions. Word has length 104 [2024-11-09 22:26:58,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:26:58,587 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 182 transitions. [2024-11-09 22:26:58,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-11-09 22:26:58,588 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 182 transitions. [2024-11-09 22:26:58,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-09 22:26:58,589 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:26:58,589 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:26:58,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 22:26:58,789 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,SelfDestructingSolverStorable13 [2024-11-09 22:26:58,790 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:26:58,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:26:58,790 INFO L85 PathProgramCache]: Analyzing trace with hash -329018397, now seen corresponding path program 1 times [2024-11-09 22:26:58,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:26:58,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119146841] [2024-11-09 22:26:58,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:26:58,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:26:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:26:58,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300618159] [2024-11-09 22:26:58,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:26:58,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:26:58,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:26:58,828 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:26:58,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 22:26:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:26:58,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 22:26:58,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:26:59,845 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 64 proven. 78 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2024-11-09 22:26:59,845 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:27:01,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:27:01,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119146841] [2024-11-09 22:27:01,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:27:01,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300618159] [2024-11-09 22:27:01,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300618159] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:27:01,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 22:27:01,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-09 22:27:01,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248036768] [2024-11-09 22:27:01,761 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 22:27:01,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 22:27:01,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:27:01,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 22:27:01,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2024-11-09 22:27:01,762 INFO L87 Difference]: Start difference. First operand 155 states and 182 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-11-09 22:27:02,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:27:02,135 INFO L93 Difference]: Finished difference Result 172 states and 197 transitions. [2024-11-09 22:27:02,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 22:27:02,135 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 104 [2024-11-09 22:27:02,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:27:02,136 INFO L225 Difference]: With dead ends: 172 [2024-11-09 22:27:02,137 INFO L226 Difference]: Without dead ends: 169 [2024-11-09 22:27:02,137 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2024-11-09 22:27:02,137 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 22:27:02,138 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 382 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 22:27:02,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-09 22:27:02,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 157. [2024-11-09 22:27:02,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 104 states have (on average 1.0865384615384615) internal successors, (113), 110 states have internal predecessors, (113), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-09 22:27:02,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 182 transitions. [2024-11-09 22:27:02,175 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 182 transitions. Word has length 104 [2024-11-09 22:27:02,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:27:02,177 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 182 transitions. [2024-11-09 22:27:02,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-11-09 22:27:02,177 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 182 transitions. [2024-11-09 22:27:02,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-09 22:27:02,178 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:27:02,178 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:27:02,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 22:27:02,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 22:27:02,383 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:27:02,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:27:02,384 INFO L85 PathProgramCache]: Analyzing trace with hash 107255838, now seen corresponding path program 2 times [2024-11-09 22:27:02,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:27:02,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183861118] [2024-11-09 22:27:02,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:27:02,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:27:02,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:02,789 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-09 22:27:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:02,793 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-09 22:27:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:02,803 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 22:27:02,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:02,806 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-09 22:27:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:02,808 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 22:27:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:02,812 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-09 22:27:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:02,814 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-09 22:27:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:02,817 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 22:27:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:02,823 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-09 22:27:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:02,826 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-09 22:27:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:02,832 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-09 22:27:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:02,837 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-11-09 22:27:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:02,841 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-11-09 22:27:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:02,846 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-11-09 22:27:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:02,852 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-11-09 22:27:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:02,854 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-11-09 22:27:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-09 22:27:02,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:27:02,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183861118] [2024-11-09 22:27:02,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183861118] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:27:02,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546822119] [2024-11-09 22:27:02,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 22:27:02,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:27:02,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:27:02,861 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:27:02,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 22:27:02,928 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 22:27:02,929 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:27:02,934 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 22:27:02,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:27:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-09 22:27:03,302 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:27:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-09 22:27:04,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546822119] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:27:04,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:27:04,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 12] total 26 [2024-11-09 22:27:04,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257162996] [2024-11-09 22:27:04,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:27:04,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 22:27:04,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:27:04,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 22:27:04,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2024-11-09 22:27:04,111 INFO L87 Difference]: Start difference. First operand 157 states and 182 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 23 states have internal predecessors, (76), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) [2024-11-09 22:27:04,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:27:04,671 INFO L93 Difference]: Finished difference Result 177 states and 205 transitions. [2024-11-09 22:27:04,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 22:27:04,672 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 23 states have internal predecessors, (76), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) Word has length 109 [2024-11-09 22:27:04,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:27:04,673 INFO L225 Difference]: With dead ends: 177 [2024-11-09 22:27:04,673 INFO L226 Difference]: Without dead ends: 128 [2024-11-09 22:27:04,673 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 22:27:04,674 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 25 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 22:27:04,674 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 672 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 22:27:04,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-09 22:27:04,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2024-11-09 22:27:04,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 82 states have (on average 1.0853658536585367) internal successors, (89), 86 states have internal predecessors, (89), 27 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-09 22:27:04,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 142 transitions. [2024-11-09 22:27:04,706 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 142 transitions. Word has length 109 [2024-11-09 22:27:04,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:27:04,706 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 142 transitions. [2024-11-09 22:27:04,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 23 states have internal predecessors, (76), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) [2024-11-09 22:27:04,707 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 142 transitions. [2024-11-09 22:27:04,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-09 22:27:04,708 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:27:04,708 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:27:04,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 22:27:04,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 22:27:04,913 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:27:04,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:27:04,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1287910423, now seen corresponding path program 3 times [2024-11-09 22:27:04,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:27:04,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868989539] [2024-11-09 22:27:04,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:27:04,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:27:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:05,118 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-09 22:27:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:05,121 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-09 22:27:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:05,124 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 22:27:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:05,126 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-09 22:27:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:05,130 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 22:27:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:05,133 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-09 22:27:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:05,135 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-09 22:27:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:05,137 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 22:27:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:05,139 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-09 22:27:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:05,142 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-09 22:27:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:05,146 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-09 22:27:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:05,149 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-11-09 22:27:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:05,151 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-11-09 22:27:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:05,154 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-11-09 22:27:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:05,157 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-11-09 22:27:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:05,160 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-11-09 22:27:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:05,163 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-11-09 22:27:05,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:05,167 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-11-09 22:27:05,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:27:05,170 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 54 proven. 34 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-11-09 22:27:05,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:27:05,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868989539] [2024-11-09 22:27:05,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868989539] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:27:05,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143126915] [2024-11-09 22:27:05,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 22:27:05,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:27:05,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:27:05,174 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:27:05,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 22:27:05,234 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 22:27:05,234 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:27:05,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 22:27:05,237 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:27:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 148 proven. 47 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2024-11-09 22:27:05,402 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:27:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2024-11-09 22:27:05,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143126915] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:27:05,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:27:05,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 8] total 18 [2024-11-09 22:27:05,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141608290] [2024-11-09 22:27:05,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:27:05,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 22:27:05,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:27:05,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 22:27:05,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2024-11-09 22:27:05,581 INFO L87 Difference]: Start difference. First operand 124 states and 142 transitions. Second operand has 18 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 10 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 7 states have call successors, (30) [2024-11-09 22:27:06,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:27:06,293 INFO L93 Difference]: Finished difference Result 147 states and 165 transitions. [2024-11-09 22:27:06,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 22:27:06,294 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 10 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 7 states have call successors, (30) Word has length 122 [2024-11-09 22:27:06,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:27:06,295 INFO L225 Difference]: With dead ends: 147 [2024-11-09 22:27:06,295 INFO L226 Difference]: Without dead ends: 138 [2024-11-09 22:27:06,295 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2024-11-09 22:27:06,296 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 42 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 22:27:06,296 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 349 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 22:27:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-09 22:27:06,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2024-11-09 22:27:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 93 states have (on average 1.075268817204301) internal successors, (100), 95 states have internal predecessors, (100), 27 states have call successors, (27), 17 states have call predecessors, (27), 17 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-09 22:27:06,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 153 transitions. [2024-11-09 22:27:06,326 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 153 transitions. Word has length 122 [2024-11-09 22:27:06,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:27:06,326 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 153 transitions. [2024-11-09 22:27:06,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 10 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 7 states have call successors, (30) [2024-11-09 22:27:06,326 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 153 transitions. [2024-11-09 22:27:06,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-09 22:27:06,327 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:27:06,327 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:27:06,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 22:27:06,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 22:27:06,532 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:27:06,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:27:06,532 INFO L85 PathProgramCache]: Analyzing trace with hash -399076229, now seen corresponding path program 4 times [2024-11-09 22:27:06,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:27:06,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280779567] [2024-11-09 22:27:06,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:27:06,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:27:06,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:27:06,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990842652] [2024-11-09 22:27:06,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 22:27:06,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:27:06,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:27:06,586 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:27:06,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 22:27:06,672 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 22:27:06,672 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:27:06,674 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-09 22:27:06,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:27:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 65 proven. 85 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-09 22:27:07,503 INFO L311 TraceCheckSpWp]: Computing backward predicates...