./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.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 870f3f117c59e986b23526e49a2d44ed8c8e543941d3d310e77e3939c7927e70 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 13:53:35,489 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 13:53:35,530 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 13:53:35,534 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 13:53:35,534 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 13:53:35,550 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 13:53:35,550 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 13:53:35,551 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 13:53:35,551 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 13:53:35,551 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 13:53:35,551 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 13:53:35,552 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 13:53:35,552 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 13:53:35,552 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 13:53:35,552 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 13:53:35,553 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 13:53:35,553 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 13:53:35,553 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 13:53:35,553 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 13:53:35,554 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 13:53:35,554 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 13:53:35,554 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 13:53:35,555 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 13:53:35,555 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 13:53:35,555 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 13:53:35,555 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 13:53:35,556 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 13:53:35,556 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 13:53:35,556 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 13:53:35,557 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 13:53:35,557 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 13:53:35,557 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 13:53:35,557 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 13:53:35,558 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 13:53:35,558 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 13:53:35,558 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 13:53:35,558 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 13:53:35,558 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 13:53:35,559 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 13:53:35,559 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 13:53:35,559 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 13:53:35,560 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 13:53:35,560 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 870f3f117c59e986b23526e49a2d44ed8c8e543941d3d310e77e3939c7927e70 [2024-11-18 13:53:35,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 13:53:35,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 13:53:35,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 13:53:35,804 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 13:53:35,804 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 13:53:35,805 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c [2024-11-18 13:53:37,139 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 13:53:37,303 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 13:53:37,304 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c [2024-11-18 13:53:37,311 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3590411e2/390aa669f26c4d24a9a8217ac91facb0/FLAGbbdf63faa [2024-11-18 13:53:37,323 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3590411e2/390aa669f26c4d24a9a8217ac91facb0 [2024-11-18 13:53:37,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 13:53:37,327 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 13:53:37,330 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 13:53:37,330 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 13:53:37,334 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 13:53:37,335 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:53:37" (1/1) ... [2024-11-18 13:53:37,335 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60daea0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:53:37, skipping insertion in model container [2024-11-18 13:53:37,335 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:53:37" (1/1) ... [2024-11-18 13:53:37,356 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 13:53:37,542 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2024-11-18 13:53:37,557 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 13:53:37,564 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 13:53:37,573 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2024-11-18 13:53:37,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 13:53:37,590 INFO L204 MainTranslator]: Completed translation [2024-11-18 13:53:37,590 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:53:37 WrapperNode [2024-11-18 13:53:37,590 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 13:53:37,591 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 13:53:37,591 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 13:53:37,591 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 13:53:37,597 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:53:37" (1/1) ... [2024-11-18 13:53:37,603 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:53:37" (1/1) ... [2024-11-18 13:53:37,621 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 39 [2024-11-18 13:53:37,622 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 13:53:37,623 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 13:53:37,623 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 13:53:37,623 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 13:53:37,631 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:53:37" (1/1) ... [2024-11-18 13:53:37,631 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:53:37" (1/1) ... [2024-11-18 13:53:37,632 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:53:37" (1/1) ... [2024-11-18 13:53:37,641 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]. [2024-11-18 13:53:37,641 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:53:37" (1/1) ... [2024-11-18 13:53:37,641 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:53:37" (1/1) ... [2024-11-18 13:53:37,643 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:53:37" (1/1) ... [2024-11-18 13:53:37,646 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:53:37" (1/1) ... [2024-11-18 13:53:37,646 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:53:37" (1/1) ... [2024-11-18 13:53:37,647 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:53:37" (1/1) ... [2024-11-18 13:53:37,649 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 13:53:37,649 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 13:53:37,649 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 13:53:37,650 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 13:53:37,650 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:53:37" (1/1) ... [2024-11-18 13:53:37,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 13:53:37,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:53:37,682 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) [2024-11-18 13:53:37,686 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 [2024-11-18 13:53:37,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 13:53:37,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 13:53:37,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 13:53:37,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 13:53:37,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-18 13:53:37,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-18 13:53:37,786 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 13:53:37,791 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 13:53:37,882 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-11-18 13:53:37,883 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 13:53:37,891 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 13:53:37,892 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-18 13:53:37,892 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:53:37 BoogieIcfgContainer [2024-11-18 13:53:37,892 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 13:53:37,894 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 13:53:37,894 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 13:53:37,896 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 13:53:37,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:53:37" (1/3) ... [2024-11-18 13:53:37,897 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@928b211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:53:37, skipping insertion in model container [2024-11-18 13:53:37,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:53:37" (2/3) ... [2024-11-18 13:53:37,898 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@928b211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:53:37, skipping insertion in model container [2024-11-18 13:53:37,898 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:53:37" (3/3) ... [2024-11-18 13:53:37,899 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound50.c [2024-11-18 13:53:37,912 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 13:53:37,912 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 13:53:37,962 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 13:53:37,967 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;@491c6ec1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 13:53:37,968 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 13:53:37,971 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 13:53:37,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-18 13:53:37,978 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:53:37,979 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:53:37,980 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:53:37,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:53:37,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1819788390, now seen corresponding path program 1 times [2024-11-18 13:53:37,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:53:37,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99325963] [2024-11-18 13:53:37,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:53:37,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:53:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:53:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:53:38,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:53:38,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99325963] [2024-11-18 13:53:38,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99325963] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:53:38,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:53:38,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-18 13:53:38,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434807565] [2024-11-18 13:53:38,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:53:38,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-18 13:53:38,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:53:38,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-18 13:53:38,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-18 13:53:38,143 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2024-11-18 13:53:38,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:53:38,158 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2024-11-18 13:53:38,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-18 13:53:38,160 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 7 [2024-11-18 13:53:38,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:53:38,166 INFO L225 Difference]: With dead ends: 34 [2024-11-18 13:53:38,166 INFO L226 Difference]: Without dead ends: 14 [2024-11-18 13:53:38,169 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 [2024-11-18 13:53:38,174 INFO L432 NwaCegarLoop]: 21 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, 21 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 [2024-11-18 13:53:38,176 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:53:38,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-18 13:53:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-11-18 13:53:38,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 13:53:38,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2024-11-18 13:53:38,207 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 7 [2024-11-18 13:53:38,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:53:38,208 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2024-11-18 13:53:38,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2024-11-18 13:53:38,208 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2024-11-18 13:53:38,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-18 13:53:38,209 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:53:38,210 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:53:38,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 13:53:38,210 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:53:38,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:53:38,212 INFO L85 PathProgramCache]: Analyzing trace with hash 178441499, now seen corresponding path program 1 times [2024-11-18 13:53:38,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:53:38,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595539871] [2024-11-18 13:53:38,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:53:38,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:53:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:53:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:53:38,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:53:38,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595539871] [2024-11-18 13:53:38,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595539871] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:53:38,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:53:38,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 13:53:38,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852034003] [2024-11-18 13:53:38,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:53:38,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 13:53:38,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:53:38,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 13:53:38,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 13:53:38,306 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2024-11-18 13:53:38,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:53:38,322 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2024-11-18 13:53:38,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 13:53:38,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2024-11-18 13:53:38,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:53:38,323 INFO L225 Difference]: With dead ends: 24 [2024-11-18 13:53:38,323 INFO L226 Difference]: Without dead ends: 16 [2024-11-18 13:53:38,324 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 13:53:38,325 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:53:38,325 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:53:38,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-18 13:53:38,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-11-18 13:53:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 13:53:38,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2024-11-18 13:53:38,329 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2024-11-18 13:53:38,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:53:38,329 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2024-11-18 13:53:38,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2024-11-18 13:53:38,329 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2024-11-18 13:53:38,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-18 13:53:38,330 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:53:38,330 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:53:38,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 13:53:38,330 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:53:38,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:53:38,331 INFO L85 PathProgramCache]: Analyzing trace with hash 180228959, now seen corresponding path program 1 times [2024-11-18 13:53:38,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:53:38,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403278950] [2024-11-18 13:53:38,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:53:38,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:53:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 13:53:38,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114122116] [2024-11-18 13:53:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:53:38,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:53:38,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:53:38,354 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) [2024-11-18 13:53:38,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 13:53:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:53:38,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-18 13:53:38,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:53:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:53:38,512 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-18 13:53:38,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:53:38,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403278950] [2024-11-18 13:53:38,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 13:53:38,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114122116] [2024-11-18 13:53:38,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114122116] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:53:38,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:53:38,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 13:53:38,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495100724] [2024-11-18 13:53:38,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:53:38,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 13:53:38,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:53:38,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 13:53:38,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 13:53:38,517 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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) [2024-11-18 13:53:38,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:53:38,598 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2024-11-18 13:53:38,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 13:53:38,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 8 [2024-11-18 13:53:38,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:53:38,599 INFO L225 Difference]: With dead ends: 26 [2024-11-18 13:53:38,599 INFO L226 Difference]: Without dead ends: 22 [2024-11-18 13:53:38,599 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 [2024-11-18 13:53:38,600 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:53:38,601 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 52 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:53:38,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-18 13:53:38,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-18 13:53:38,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 13:53:38,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-11-18 13:53:38,606 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 8 [2024-11-18 13:53:38,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:53:38,606 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-11-18 13:53:38,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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) [2024-11-18 13:53:38,606 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-11-18 13:53:38,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-18 13:53:38,607 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:53:38,607 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:53:38,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-18 13:53:38,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:53:38,812 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:53:38,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:53:38,814 INFO L85 PathProgramCache]: Analyzing trace with hash 823572993, now seen corresponding path program 1 times [2024-11-18 13:53:38,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:53:38,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715618355] [2024-11-18 13:53:38,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:53:38,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:53:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:53:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:53:38,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:53:38,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715618355] [2024-11-18 13:53:38,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715618355] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:53:38,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609484791] [2024-11-18 13:53:38,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:53:38,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:53:38,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:53:38,909 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) [2024-11-18 13:53:38,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 13:53:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:53:38,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-18 13:53:38,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:53:38,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:53:38,966 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:53:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:53:39,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609484791] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:53:39,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:53:39,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-11-18 13:53:39,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909941059] [2024-11-18 13:53:39,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:53:39,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-18 13:53:39,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:53:39,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-18 13:53:39,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-18 13:53:39,004 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-18 13:53:39,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:53:39,067 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2024-11-18 13:53:39,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-18 13:53:39,067 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 16 [2024-11-18 13:53:39,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:53:39,068 INFO L225 Difference]: With dead ends: 56 [2024-11-18 13:53:39,068 INFO L226 Difference]: Without dead ends: 48 [2024-11-18 13:53:39,068 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-18 13:53:39,070 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:53:39,071 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 63 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:53:39,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-18 13:53:39,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2024-11-18 13:53:39,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 32 states have internal predecessors, (36), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 13:53:39,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-11-18 13:53:39,078 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 16 [2024-11-18 13:53:39,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:53:39,078 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-11-18 13:53:39,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-18 13:53:39,079 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-11-18 13:53:39,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-18 13:53:39,079 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:53:39,079 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:53:39,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-18 13:53:39,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-18 13:53:39,280 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:53:39,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:53:39,281 INFO L85 PathProgramCache]: Analyzing trace with hash 825360453, now seen corresponding path program 1 times [2024-11-18 13:53:39,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:53:39,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220913639] [2024-11-18 13:53:39,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:53:39,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:53:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 13:53:39,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817573667] [2024-11-18 13:53:39,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:53:39,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:53:39,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:53:39,299 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) [2024-11-18 13:53:39,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 13:53:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:53:39,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-18 13:53:39,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:53:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:53:39,403 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:53:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:53:39,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:53:39,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220913639] [2024-11-18 13:53:39,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 13:53:39,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817573667] [2024-11-18 13:53:39,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817573667] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:53:39,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 13:53:39,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2024-11-18 13:53:39,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203581808] [2024-11-18 13:53:39,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 13:53:39,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-18 13:53:39,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:53:39,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-18 13:53:39,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-18 13:53:39,484 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 13:53:39,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:53:39,548 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2024-11-18 13:53:39,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 13:53:39,549 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2024-11-18 13:53:39,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:53:39,550 INFO L225 Difference]: With dead ends: 58 [2024-11-18 13:53:39,551 INFO L226 Difference]: Without dead ends: 47 [2024-11-18 13:53:39,552 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-18 13:53:39,554 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:53:39,554 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 91 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:53:39,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-18 13:53:39,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2024-11-18 13:53:39,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 13:53:39,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2024-11-18 13:53:39,562 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 16 [2024-11-18 13:53:39,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:53:39,563 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2024-11-18 13:53:39,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 13:53:39,563 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2024-11-18 13:53:39,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-18 13:53:39,563 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:53:39,564 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:53:39,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-18 13:53:39,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:53:39,768 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:53:39,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:53:39,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1696898494, now seen corresponding path program 1 times [2024-11-18 13:53:39,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:53:39,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239960286] [2024-11-18 13:53:39,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:53:39,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:53:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 13:53:39,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943060683] [2024-11-18 13:53:39,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:53:39,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:53:39,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:53:39,785 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) [2024-11-18 13:53:39,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 13:53:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:53:39,819 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-18 13:53:39,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:53:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 13:53:39,945 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:53:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 13:53:40,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:53:40,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239960286] [2024-11-18 13:53:40,145 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 13:53:40,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943060683] [2024-11-18 13:53:40,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943060683] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:53:40,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 13:53:40,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2024-11-18 13:53:40,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115692078] [2024-11-18 13:53:40,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 13:53:40,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-18 13:53:40,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:53:40,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-18 13:53:40,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-11-18 13:53:40,147 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 15 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 13:53:40,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:53:40,250 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2024-11-18 13:53:40,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-18 13:53:40,250 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2024-11-18 13:53:40,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:53:40,251 INFO L225 Difference]: With dead ends: 49 [2024-11-18 13:53:40,251 INFO L226 Difference]: Without dead ends: 43 [2024-11-18 13:53:40,251 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-11-18 13:53:40,252 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:53:40,252 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 99 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:53:40,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-18 13:53:40,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-18 13:53:40,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-18 13:53:40,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2024-11-18 13:53:40,261 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 22 [2024-11-18 13:53:40,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:53:40,261 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2024-11-18 13:53:40,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 13:53:40,262 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2024-11-18 13:53:40,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-18 13:53:40,262 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:53:40,262 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2024-11-18 13:53:40,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-18 13:53:40,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:53:40,467 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:53:40,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:53:40,467 INFO L85 PathProgramCache]: Analyzing trace with hash 2045303987, now seen corresponding path program 2 times [2024-11-18 13:53:40,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:53:40,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000538023] [2024-11-18 13:53:40,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:53:40,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:53:40,487 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:53:40,487 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:53:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-18 13:53:40,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:53:40,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000538023] [2024-11-18 13:53:40,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000538023] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:53:40,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523617167] [2024-11-18 13:53:40,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:53:40,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:53:40,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:53:40,618 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) [2024-11-18 13:53:40,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 13:53:40,673 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:53:40,673 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:53:40,674 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-18 13:53:40,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:53:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:53:40,719 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:53:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-18 13:53:40,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523617167] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:53:40,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:53:40,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2024-11-18 13:53:40,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440001995] [2024-11-18 13:53:40,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:53:40,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-18 13:53:40,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:53:40,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-18 13:53:40,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-18 13:53:40,813 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-18 13:53:40,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:53:40,953 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2024-11-18 13:53:40,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-18 13:53:40,954 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 40 [2024-11-18 13:53:40,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:53:40,955 INFO L225 Difference]: With dead ends: 119 [2024-11-18 13:53:40,955 INFO L226 Difference]: Without dead ends: 114 [2024-11-18 13:53:40,955 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2024-11-18 13:53:40,956 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:53:40,956 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 109 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:53:40,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-18 13:53:40,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 89. [2024-11-18 13:53:40,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-18 13:53:40,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2024-11-18 13:53:40,970 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 40 [2024-11-18 13:53:40,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:53:40,970 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2024-11-18 13:53:40,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-18 13:53:40,970 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2024-11-18 13:53:40,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-18 13:53:40,971 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:53:40,971 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2024-11-18 13:53:40,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-18 13:53:41,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:53:41,173 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:53:41,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:53:41,173 INFO L85 PathProgramCache]: Analyzing trace with hash -635357324, now seen corresponding path program 2 times [2024-11-18 13:53:41,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:53:41,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913633562] [2024-11-18 13:53:41,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:53:41,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:53:41,190 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:53:41,191 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-18 13:53:41,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907270312] [2024-11-18 13:53:41,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:53:41,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:53:41,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:53:41,193 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) [2024-11-18 13:53:41,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-18 13:53:41,232 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:53:41,232 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:53:41,233 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-18 13:53:41,235 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:53:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-18 13:53:41,387 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:53:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-18 13:53:41,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:53:41,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913633562] [2024-11-18 13:53:41,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 13:53:41,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907270312] [2024-11-18 13:53:41,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907270312] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:53:41,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 13:53:41,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2024-11-18 13:53:41,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820519901] [2024-11-18 13:53:41,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 13:53:41,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-18 13:53:41,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:53:41,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-18 13:53:41,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2024-11-18 13:53:41,670 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 22 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-18 13:53:41,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:53:41,955 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2024-11-18 13:53:41,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-18 13:53:41,955 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 46 [2024-11-18 13:53:41,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:53:41,956 INFO L225 Difference]: With dead ends: 95 [2024-11-18 13:53:41,956 INFO L226 Difference]: Without dead ends: 89 [2024-11-18 13:53:41,957 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2024-11-18 13:53:41,957 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 13:53:41,958 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 214 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 13:53:41,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-18 13:53:41,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2024-11-18 13:53:41,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-18 13:53:41,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2024-11-18 13:53:41,970 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 46 [2024-11-18 13:53:41,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:53:41,971 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2024-11-18 13:53:41,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-18 13:53:41,971 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2024-11-18 13:53:41,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-18 13:53:41,972 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:53:41,972 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2024-11-18 13:53:41,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-18 13:53:42,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:53:42,174 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:53:42,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:53:42,174 INFO L85 PathProgramCache]: Analyzing trace with hash -780287977, now seen corresponding path program 3 times [2024-11-18 13:53:42,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:53:42,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440602950] [2024-11-18 13:53:42,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 13:53:42,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:53:42,214 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-18 13:53:42,214 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:53:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-18 13:53:42,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:53:42,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440602950] [2024-11-18 13:53:42,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440602950] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:53:42,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601656101] [2024-11-18 13:53:42,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 13:53:42,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:53:42,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:53:42,582 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) [2024-11-18 13:53:42,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-18 13:53:42,648 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-18 13:53:42,648 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:53:42,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-18 13:53:42,651 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:53:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:53:42,735 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:53:42,974 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-18 13:53:42,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601656101] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:53:42,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:53:42,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 26 [2024-11-18 13:53:42,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034513490] [2024-11-18 13:53:42,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:53:42,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-18 13:53:42,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:53:42,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-18 13:53:42,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2024-11-18 13:53:42,977 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (31), 12 states have call predecessors, (31), 11 states have return successors, (30), 20 states have call predecessors, (30), 20 states have call successors, (30) [2024-11-18 13:53:43,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:53:43,374 INFO L93 Difference]: Finished difference Result 190 states and 201 transitions. [2024-11-18 13:53:43,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-18 13:53:43,375 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (31), 12 states have call predecessors, (31), 11 states have return successors, (30), 20 states have call predecessors, (30), 20 states have call successors, (30) Word has length 88 [2024-11-18 13:53:43,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:53:43,376 INFO L225 Difference]: With dead ends: 190 [2024-11-18 13:53:43,376 INFO L226 Difference]: Without dead ends: 185 [2024-11-18 13:53:43,377 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2024-11-18 13:53:43,378 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 125 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:53:43,378 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 120 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:53:43,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-18 13:53:43,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2024-11-18 13:53:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0071942446043165) internal successors, (140), 139 states have internal predecessors, (140), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-18 13:53:43,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2024-11-18 13:53:43,423 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 88 [2024-11-18 13:53:43,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:53:43,423 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2024-11-18 13:53:43,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (31), 12 states have call predecessors, (31), 11 states have return successors, (30), 20 states have call predecessors, (30), 20 states have call successors, (30) [2024-11-18 13:53:43,424 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2024-11-18 13:53:43,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-11-18 13:53:43,428 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:53:43,428 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2024-11-18 13:53:43,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-18 13:53:43,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:53:43,629 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:53:43,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:53:43,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2069758241, now seen corresponding path program 4 times [2024-11-18 13:53:43,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:53:43,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453875857] [2024-11-18 13:53:43,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 13:53:43,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:53:43,724 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 13:53:43,725 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:53:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 968 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2024-11-18 13:53:44,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:53:44,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453875857] [2024-11-18 13:53:44,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453875857] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:53:44,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916004328] [2024-11-18 13:53:44,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 13:53:44,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:53:44,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:53:44,799 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) [2024-11-18 13:53:44,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-18 13:53:45,380 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 13:53:45,380 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:53:45,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-18 13:53:45,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:53:45,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:53:45,569 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:53:46,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 968 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2024-11-18 13:53:46,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916004328] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:53:46,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:53:46,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 50 [2024-11-18 13:53:46,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514088335] [2024-11-18 13:53:46,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:53:46,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-18 13:53:46,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:53:46,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-18 13:53:46,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2024-11-18 13:53:46,349 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand has 50 states, 50 states have (on average 4.24) internal successors, (212), 50 states have internal predecessors, (212), 45 states have call successors, (67), 24 states have call predecessors, (67), 23 states have return successors, (66), 44 states have call predecessors, (66), 44 states have call successors, (66) [2024-11-18 13:53:47,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:53:47,513 INFO L93 Difference]: Finished difference Result 382 states and 405 transitions. [2024-11-18 13:53:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-11-18 13:53:47,513 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.24) internal successors, (212), 50 states have internal predecessors, (212), 45 states have call successors, (67), 24 states have call predecessors, (67), 23 states have return successors, (66), 44 states have call predecessors, (66), 44 states have call successors, (66) Word has length 184 [2024-11-18 13:53:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:53:47,520 INFO L225 Difference]: With dead ends: 382 [2024-11-18 13:53:47,520 INFO L226 Difference]: Without dead ends: 377 [2024-11-18 13:53:47,522 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2024-11-18 13:53:47,523 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 287 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 13:53:47,523 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 234 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 13:53:47,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2024-11-18 13:53:47,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2024-11-18 13:53:47,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0035335689045937) internal successors, (284), 283 states have internal predecessors, (284), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2024-11-18 13:53:47,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 377 transitions. [2024-11-18 13:53:47,560 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 377 transitions. Word has length 184 [2024-11-18 13:53:47,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:53:47,561 INFO L471 AbstractCegarLoop]: Abstraction has 377 states and 377 transitions. [2024-11-18 13:53:47,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.24) internal successors, (212), 50 states have internal predecessors, (212), 45 states have call successors, (67), 24 states have call predecessors, (67), 23 states have return successors, (66), 44 states have call predecessors, (66), 44 states have call successors, (66) [2024-11-18 13:53:47,561 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 377 transitions. [2024-11-18 13:53:47,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2024-11-18 13:53:47,570 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:53:47,570 INFO L215 NwaCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2024-11-18 13:53:47,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-18 13:53:47,771 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,SelfDestructingSolverStorable9 [2024-11-18 13:53:47,771 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:53:47,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:53:47,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1399563153, now seen corresponding path program 5 times [2024-11-18 13:53:47,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:53:47,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171584823] [2024-11-18 13:53:47,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 13:53:47,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:53:48,009 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2024-11-18 13:53:48,009 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:53:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 92 proven. 4232 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2024-11-18 13:53:51,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:53:51,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171584823] [2024-11-18 13:53:51,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171584823] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:53:51,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680210702] [2024-11-18 13:53:51,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 13:53:51,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:53:51,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:53:51,155 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) [2024-11-18 13:53:51,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-18 13:53:52,860 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2024-11-18 13:53:52,860 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:53:52,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-18 13:53:52,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:53:53,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 92 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:53:53,207 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:53:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 92 proven. 4232 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2024-11-18 13:53:54,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680210702] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:53:54,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:53:54,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 50] total 54 [2024-11-18 13:53:54,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100974217] [2024-11-18 13:53:54,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:53:54,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-18 13:53:54,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:53:54,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-18 13:53:54,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2024-11-18 13:53:54,385 INFO L87 Difference]: Start difference. First operand 377 states and 377 transitions. Second operand has 54 states, 54 states have (on average 5.537037037037037) internal successors, (299), 54 states have internal predecessors, (299), 50 states have call successors, (96), 48 states have call predecessors, (96), 47 states have return successors, (95), 49 states have call predecessors, (95), 49 states have call successors, (95) [2024-11-18 13:53:55,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:53:55,644 INFO L93 Difference]: Finished difference Result 414 states and 417 transitions. [2024-11-18 13:53:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2024-11-18 13:53:55,644 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.537037037037037) internal successors, (299), 54 states have internal predecessors, (299), 50 states have call successors, (96), 48 states have call predecessors, (96), 47 states have return successors, (95), 49 states have call predecessors, (95), 49 states have call successors, (95) Word has length 376 [2024-11-18 13:53:55,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:53:55,647 INFO L225 Difference]: With dead ends: 414 [2024-11-18 13:53:55,647 INFO L226 Difference]: Without dead ends: 409 [2024-11-18 13:53:55,650 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 704 SyntacticMatches, 44 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3926, Invalid=6580, Unknown=0, NotChecked=0, Total=10506 [2024-11-18 13:53:55,651 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 13:53:55,651 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 248 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 13:53:55,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2024-11-18 13:53:55,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 409. [2024-11-18 13:53:55,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 307 states have (on average 1.003257328990228) internal successors, (308), 307 states have internal predecessors, (308), 51 states have call successors, (51), 51 states have call predecessors, (51), 50 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2024-11-18 13:53:55,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 409 transitions. [2024-11-18 13:53:55,715 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 409 transitions. Word has length 376 [2024-11-18 13:53:55,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:53:55,716 INFO L471 AbstractCegarLoop]: Abstraction has 409 states and 409 transitions. [2024-11-18 13:53:55,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.537037037037037) internal successors, (299), 54 states have internal predecessors, (299), 50 states have call successors, (96), 48 states have call predecessors, (96), 47 states have return successors, (95), 49 states have call predecessors, (95), 49 states have call successors, (95) [2024-11-18 13:53:55,716 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 409 transitions. [2024-11-18 13:53:55,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2024-11-18 13:53:55,720 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:53:55,720 INFO L215 NwaCegarLoop]: trace histogram [51, 51, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2024-11-18 13:53:55,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-18 13:53:55,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:53:55,925 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:53:55,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:53:55,925 INFO L85 PathProgramCache]: Analyzing trace with hash -458744825, now seen corresponding path program 6 times [2024-11-18 13:53:55,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:53:55,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403207236] [2024-11-18 13:53:55,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 13:53:55,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:53:56,148 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2024-11-18 13:53:56,149 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-18 13:53:56,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752840907] [2024-11-18 13:53:56,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 13:53:56,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:53:56,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:53:56,154 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) [2024-11-18 13:53:56,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process