./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d 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/ps6-ll_unwindbound20.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 946e199240c0e980bd422384e40e4d2247ef6b3560471b18ba5a354c3628dba9 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 14:43:59,518 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 14:43:59,566 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 14:43:59,573 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 14:43:59,573 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 14:43:59,591 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 14:43:59,591 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 14:43:59,592 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 14:43:59,592 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 14:43:59,592 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 14:43:59,593 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 14:43:59,593 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 14:43:59,593 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 14:43:59,595 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 14:43:59,595 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 14:43:59,595 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 14:43:59,595 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 14:43:59,596 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 14:43:59,596 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 14:43:59,596 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 14:43:59,596 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 14:43:59,597 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 14:43:59,599 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 14:43:59,599 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 14:43:59,599 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 14:43:59,599 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 14:43:59,599 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 14:43:59,599 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 14:43:59,600 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 14:43:59,600 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 14:43:59,600 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 14:43:59,600 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 14:43:59,600 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:43:59,600 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 14:43:59,601 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 14:43:59,601 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 14:43:59,601 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 14:43:59,601 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 14:43:59,601 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 14:43:59,601 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 14:43:59,602 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 14:43:59,602 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 14:43:59,602 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 946e199240c0e980bd422384e40e4d2247ef6b3560471b18ba5a354c3628dba9 [2024-11-08 14:43:59,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 14:43:59,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 14:43:59,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 14:43:59,817 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 14:43:59,818 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 14:43:59,818 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound20.c [2024-11-08 14:44:01,016 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 14:44:01,143 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 14:44:01,144 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound20.c [2024-11-08 14:44:01,149 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c6592106/40b9968970d24d619deead59145727e9/FLAG3fbeeee6f [2024-11-08 14:44:01,569 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c6592106/40b9968970d24d619deead59145727e9 [2024-11-08 14:44:01,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 14:44:01,572 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 14:44:01,573 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 14:44:01,573 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 14:44:01,577 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 14:44:01,577 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:44:01" (1/1) ... [2024-11-08 14:44:01,578 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5091e92b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:44:01, skipping insertion in model container [2024-11-08 14:44:01,578 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:44:01" (1/1) ... [2024-11-08 14:44:01,594 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 14:44:01,745 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/ps6-ll_unwindbound20.c[458,471] [2024-11-08 14:44:01,757 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:44:01,763 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 14:44:01,774 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/ps6-ll_unwindbound20.c[458,471] [2024-11-08 14:44:01,782 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:44:01,794 INFO L204 MainTranslator]: Completed translation [2024-11-08 14:44:01,795 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:44:01 WrapperNode [2024-11-08 14:44:01,795 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 14:44:01,796 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 14:44:01,796 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 14:44:01,796 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 14:44:01,803 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:44:01" (1/1) ... [2024-11-08 14:44:01,809 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:44:01" (1/1) ... [2024-11-08 14:44:01,824 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2024-11-08 14:44:01,824 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 14:44:01,825 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 14:44:01,825 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 14:44:01,825 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 14:44:01,835 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:44:01" (1/1) ... [2024-11-08 14:44:01,835 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:44:01" (1/1) ... [2024-11-08 14:44:01,836 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:44:01" (1/1) ... [2024-11-08 14:44:01,858 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]. [2024-11-08 14:44:01,858 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:44:01" (1/1) ... [2024-11-08 14:44:01,858 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:44:01" (1/1) ... [2024-11-08 14:44:01,860 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:44:01" (1/1) ... [2024-11-08 14:44:01,862 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:44:01" (1/1) ... [2024-11-08 14:44:01,862 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:44:01" (1/1) ... [2024-11-08 14:44:01,865 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:44:01" (1/1) ... [2024-11-08 14:44:01,866 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 14:44:01,866 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 14:44:01,870 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 14:44:01,870 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 14:44:01,871 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:44:01" (1/1) ... [2024-11-08 14:44:01,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:44:01,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:44:01,905 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) [2024-11-08 14:44:01,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 14:44:01,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 14:44:01,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 14:44:01,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 14:44:01,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 14:44:01,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-08 14:44:01,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-08 14:44:01,991 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 14:44:01,993 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 14:44:02,096 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-08 14:44:02,097 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 14:44:02,106 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 14:44:02,106 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-08 14:44:02,106 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:44:02 BoogieIcfgContainer [2024-11-08 14:44:02,107 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 14:44:02,109 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 14:44:02,109 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 14:44:02,112 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 14:44:02,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 02:44:01" (1/3) ... [2024-11-08 14:44:02,113 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77fbfdae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:44:02, skipping insertion in model container [2024-11-08 14:44:02,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:44:01" (2/3) ... [2024-11-08 14:44:02,114 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77fbfdae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:44:02, skipping insertion in model container [2024-11-08 14:44:02,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:44:02" (3/3) ... [2024-11-08 14:44:02,115 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound20.c [2024-11-08 14:44:02,128 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 14:44:02,128 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 14:44:02,168 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 14:44:02,174 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;@2a57ba3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 14:44:02,174 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 14:44:02,179 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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) [2024-11-08 14:44:02,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-08 14:44:02,183 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:44:02,184 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:44:02,184 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:44:02,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:44:02,188 INFO L85 PathProgramCache]: Analyzing trace with hash -579246775, now seen corresponding path program 1 times [2024-11-08 14:44:02,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:44:02,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298586307] [2024-11-08 14:44:02,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:44:02,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:44:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:44:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:44:02,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:44:02,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298586307] [2024-11-08 14:44:02,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298586307] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:44:02,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:44:02,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 14:44:02,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749959281] [2024-11-08 14:44:02,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:44:02,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 14:44:02,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:44:02,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 14:44:02,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 14:44:02,329 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2024-11-08 14:44:02,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:44:02,341 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2024-11-08 14:44:02,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 14:44:02,343 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 9 [2024-11-08 14:44:02,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:44:02,349 INFO L225 Difference]: With dead ends: 37 [2024-11-08 14:44:02,349 INFO L226 Difference]: Without dead ends: 16 [2024-11-08 14:44:02,351 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 [2024-11-08 14:44:02,353 INFO L432 NwaCegarLoop]: 23 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, 23 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 [2024-11-08 14:44:02,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:44:02,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-08 14:44:02,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-11-08 14:44:02,376 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) [2024-11-08 14:44:02,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2024-11-08 14:44:02,378 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2024-11-08 14:44:02,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:44:02,378 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2024-11-08 14:44:02,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2024-11-08 14:44:02,378 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2024-11-08 14:44:02,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 14:44:02,379 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:44:02,379 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:44:02,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 14:44:02,379 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:44:02,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:44:02,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1986551203, now seen corresponding path program 1 times [2024-11-08 14:44:02,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:44:02,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571173649] [2024-11-08 14:44:02,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:44:02,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:44:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:44:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:44:02,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:44:02,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571173649] [2024-11-08 14:44:02,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571173649] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:44:02,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:44:02,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 14:44:02,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324439140] [2024-11-08 14:44:02,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:44:02,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 14:44:02,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:44:02,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 14:44:02,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 14:44:02,532 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-11-08 14:44:02,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:44:02,549 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2024-11-08 14:44:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 14:44:02,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2024-11-08 14:44:02,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:44:02,549 INFO L225 Difference]: With dead ends: 26 [2024-11-08 14:44:02,550 INFO L226 Difference]: Without dead ends: 18 [2024-11-08 14:44:02,550 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 [2024-11-08 14:44:02,551 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 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 [2024-11-08 14:44:02,551 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:44:02,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-08 14:44:02,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-08 14:44:02,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 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) [2024-11-08 14:44:02,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-11-08 14:44:02,557 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2024-11-08 14:44:02,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:44:02,557 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-11-08 14:44:02,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-11-08 14:44:02,558 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-11-08 14:44:02,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 14:44:02,558 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:44:02,558 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:44:02,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 14:44:02,561 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:44:02,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:44:02,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1984763743, now seen corresponding path program 1 times [2024-11-08 14:44:02,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:44:02,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832219999] [2024-11-08 14:44:02,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:44:02,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:44:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:44:02,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498690785] [2024-11-08 14:44:02,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:44:02,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:44:02,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:44:02,583 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) [2024-11-08 14:44:02,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 14:44:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:44:02,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 14:44:02,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:44:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:44:02,706 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 14:44:02,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:44:02,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832219999] [2024-11-08 14:44:02,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:44:02,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498690785] [2024-11-08 14:44:02,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498690785] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:44:02,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:44:02,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:44:02,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325623650] [2024-11-08 14:44:02,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:44:02,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:44:02,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:44:02,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:44:02,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:44:02,708 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-11-08 14:44:02,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:44:02,750 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2024-11-08 14:44:02,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:44:02,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 10 [2024-11-08 14:44:02,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:44:02,751 INFO L225 Difference]: With dead ends: 28 [2024-11-08 14:44:02,751 INFO L226 Difference]: Without dead ends: 24 [2024-11-08 14:44:02,752 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 14:44:02,753 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:44:02,753 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 59 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:44:02,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-08 14:44:02,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-08 14:44:02,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 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) [2024-11-08 14:44:02,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-08 14:44:02,757 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2024-11-08 14:44:02,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:44:02,758 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-08 14:44:02,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-11-08 14:44:02,758 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-08 14:44:02,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-08 14:44:02,758 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:44:02,758 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:44:02,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 14:44:02,959 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 [2024-11-08 14:44:02,959 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:44:02,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:44:02,960 INFO L85 PathProgramCache]: Analyzing trace with hash -69803837, now seen corresponding path program 1 times [2024-11-08 14:44:02,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:44:02,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221164424] [2024-11-08 14:44:02,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:44:02,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:44:02,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:44:03,042 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-08 14:44:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:44:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:44:03,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:44:03,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221164424] [2024-11-08 14:44:03,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221164424] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:44:03,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413584865] [2024-11-08 14:44:03,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:44:03,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:44:03,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:44:03,062 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) [2024-11-08 14:44:03,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 14:44:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:44:03,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-08 14:44:03,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:44:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:44:03,125 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:44:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:44:03,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413584865] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:44:03,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:44:03,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-11-08 14:44:03,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674727616] [2024-11-08 14:44:03,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:44:03,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 14:44:03,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:44:03,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 14:44:03,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-08 14:44:03,163 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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) [2024-11-08 14:44:03,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:44:03,222 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2024-11-08 14:44:03,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 14:44:03,223 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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 18 [2024-11-08 14:44:03,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:44:03,224 INFO L225 Difference]: With dead ends: 58 [2024-11-08 14:44:03,224 INFO L226 Difference]: Without dead ends: 50 [2024-11-08 14:44:03,225 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-08 14:44:03,225 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:44:03,225 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 67 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:44:03,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-08 14:44:03,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2024-11-08 14:44:03,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 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) [2024-11-08 14:44:03,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2024-11-08 14:44:03,237 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 18 [2024-11-08 14:44:03,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:44:03,237 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2024-11-08 14:44:03,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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) [2024-11-08 14:44:03,237 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2024-11-08 14:44:03,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-08 14:44:03,238 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:44:03,238 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:44:03,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 14:44:03,438 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 [2024-11-08 14:44:03,438 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:44:03,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:44:03,439 INFO L85 PathProgramCache]: Analyzing trace with hash -68016377, now seen corresponding path program 1 times [2024-11-08 14:44:03,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:44:03,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23538699] [2024-11-08 14:44:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:44:03,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:44:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:44:03,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025627845] [2024-11-08 14:44:03,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:44:03,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:44:03,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:44:03,467 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) [2024-11-08 14:44:03,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 14:44:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:44:03,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 14:44:03,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:44:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:44:03,568 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:44:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 14:44:03,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:44:03,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23538699] [2024-11-08 14:44:03,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:44:03,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025627845] [2024-11-08 14:44:03,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025627845] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 14:44:03,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:44:03,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-08 14:44:03,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497475559] [2024-11-08 14:44:03,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:44:03,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:44:03,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:44:03,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:44:03,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-08 14:44:03,638 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-08 14:44:03,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:44:03,682 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2024-11-08 14:44:03,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:44:03,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-11-08 14:44:03,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:44:03,684 INFO L225 Difference]: With dead ends: 60 [2024-11-08 14:44:03,684 INFO L226 Difference]: Without dead ends: 52 [2024-11-08 14:44:03,684 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-08 14:44:03,685 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:44:03,685 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 47 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:44:03,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-08 14:44:03,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2024-11-08 14:44:03,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-08 14:44:03,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2024-11-08 14:44:03,702 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 18 [2024-11-08 14:44:03,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:44:03,702 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2024-11-08 14:44:03,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-08 14:44:03,703 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2024-11-08 14:44:03,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-08 14:44:03,704 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:44:03,704 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:44:03,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 14:44:03,908 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 [2024-11-08 14:44:03,909 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:44:03,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:44:03,910 INFO L85 PathProgramCache]: Analyzing trace with hash 156635680, now seen corresponding path program 1 times [2024-11-08 14:44:03,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:44:03,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448597243] [2024-11-08 14:44:03,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:44:03,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:44:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:44:03,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821620154] [2024-11-08 14:44:03,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:44:03,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:44:03,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:44:03,936 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) [2024-11-08 14:44:03,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 14:44:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:44:03,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 14:44:03,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:44:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 14:44:04,069 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:44:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 14:44:04,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:44:04,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448597243] [2024-11-08 14:44:04,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:44:04,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821620154] [2024-11-08 14:44:04,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821620154] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:44:04,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:44:04,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-11-08 14:44:04,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403688627] [2024-11-08 14:44:04,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:44:04,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 14:44:04,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:44:04,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 14:44:04,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-08 14:44:04,161 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 10 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 14:44:04,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:44:04,239 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2024-11-08 14:44:04,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 14:44:04,240 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 29 [2024-11-08 14:44:04,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:44:04,240 INFO L225 Difference]: With dead ends: 55 [2024-11-08 14:44:04,241 INFO L226 Difference]: Without dead ends: 46 [2024-11-08 14:44:04,241 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-08 14:44:04,241 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:44:04,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 91 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:44:04,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-08 14:44:04,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-08 14:44:04,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 14:44:04,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2024-11-08 14:44:04,254 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 29 [2024-11-08 14:44:04,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:44:04,254 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2024-11-08 14:44:04,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 14:44:04,255 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2024-11-08 14:44:04,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-08 14:44:04,256 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:44:04,256 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:44:04,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 14:44:04,456 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 [2024-11-08 14:44:04,457 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:44:04,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:44:04,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1854611729, now seen corresponding path program 1 times [2024-11-08 14:44:04,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:44:04,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654501850] [2024-11-08 14:44:04,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:44:04,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:44:04,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:44:04,652 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-08 14:44:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:44:04,657 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-08 14:44:04,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:44:04,664 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-08 14:44:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:44:04,668 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-08 14:44:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:44:04,672 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-08 14:44:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:44:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 14:44:04,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:44:04,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654501850] [2024-11-08 14:44:04,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654501850] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:44:04,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808945176] [2024-11-08 14:44:04,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:44:04,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:44:04,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:44:04,679 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) [2024-11-08 14:44:04,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 14:44:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:44:04,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 14:44:04,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:44:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 14:44:04,777 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:44:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 14:44:04,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808945176] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:44:04,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:44:04,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2024-11-08 14:44:04,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927294983] [2024-11-08 14:44:04,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:44:04,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 14:44:04,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:44:04,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 14:44:04,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-08 14:44:04,868 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2024-11-08 14:44:05,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:44:05,060 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2024-11-08 14:44:05,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-08 14:44:05,063 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) Word has length 47 [2024-11-08 14:44:05,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:44:05,064 INFO L225 Difference]: With dead ends: 132 [2024-11-08 14:44:05,064 INFO L226 Difference]: Without dead ends: 122 [2024-11-08 14:44:05,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2024-11-08 14:44:05,065 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 77 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:44:05,065 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 106 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:44:05,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-08 14:44:05,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2024-11-08 14:44:05,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 74 states have internal predecessors, (76), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-08 14:44:05,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2024-11-08 14:44:05,083 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 47 [2024-11-08 14:44:05,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:44:05,084 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2024-11-08 14:44:05,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2024-11-08 14:44:05,084 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2024-11-08 14:44:05,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-08 14:44:05,085 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:44:05,085 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:44:05,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 14:44:05,288 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 [2024-11-08 14:44:05,289 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:44:05,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:44:05,290 INFO L85 PathProgramCache]: Analyzing trace with hash 348710830, now seen corresponding path program 2 times [2024-11-08 14:44:05,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:44:05,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427564002] [2024-11-08 14:44:05,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:44:05,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:44:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:44:05,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076906203] [2024-11-08 14:44:05,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 14:44:05,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:44:05,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:44:05,310 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) [2024-11-08 14:44:05,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 14:44:05,360 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 14:44:05,360 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:44:05,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-08 14:44:05,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:44:05,542 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-08 14:44:05,542 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:44:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-08 14:44:05,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:44:05,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427564002] [2024-11-08 14:44:05,771 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:44:05,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076906203] [2024-11-08 14:44:05,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076906203] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:44:05,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:44:05,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2024-11-08 14:44:05,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821654601] [2024-11-08 14:44:05,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:44:05,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 14:44:05,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:44:05,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 14:44:05,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-11-08 14:44:05,772 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand has 20 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-08 14:44:06,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:44:06,142 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2024-11-08 14:44:06,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-08 14:44:06,143 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 53 [2024-11-08 14:44:06,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:44:06,144 INFO L225 Difference]: With dead ends: 103 [2024-11-08 14:44:06,144 INFO L226 Difference]: Without dead ends: 92 [2024-11-08 14:44:06,144 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2024-11-08 14:44:06,145 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:44:06,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 254 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:44:06,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-08 14:44:06,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-08 14:44:06,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-08 14:44:06,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2024-11-08 14:44:06,167 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 53 [2024-11-08 14:44:06,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:44:06,167 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2024-11-08 14:44:06,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-08 14:44:06,167 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2024-11-08 14:44:06,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-08 14:44:06,169 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:44:06,169 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:44:06,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 14:44:06,369 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 [2024-11-08 14:44:06,370 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:44:06,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:44:06,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1207691024, now seen corresponding path program 3 times [2024-11-08 14:44:06,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:44:06,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519792601] [2024-11-08 14:44:06,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:44:06,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:44:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:44:06,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274299480] [2024-11-08 14:44:06,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 14:44:06,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:44:06,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:44:06,404 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) [2024-11-08 14:44:06,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 14:44:06,527 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-08 14:44:06,527 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:44:06,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-08 14:44:06,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:44:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 45 proven. 187 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-08 14:44:06,767 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:44:14,902 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (= (+ |c_ULTIMATE.start_main_~y~0#1| .cse0) (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 7) .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))))) is different from false [2024-11-08 14:44:26,951 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-08 14:44:38,971 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-08 14:44:46,988 WARN L873 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39|))) (or (= (+ |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26|)) (+ |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| .cse0)) (= (mod (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 7) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 10) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 6)) 12) 0))))) is different from true [2024-11-08 14:44:59,013 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-08 14:45:15,055 WARN L286 SmtUtils]: Spent 8.00s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-08 14:45:23,067 WARN L873 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0) (forall ((|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39|))) (or (= (+ |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26|)) (+ |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| .cse0)) (= (mod (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 7) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 10) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 6)) 12) 0))))) is different from true [2024-11-08 14:45:39,480 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 7) .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (= (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 2)) (+ (* |c_ULTIMATE.start_main_~c~0#1| 2) (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|))))) is different from false