./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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/egcd3-ll_valuebound10.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 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 13:52:28,010 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 13:52:28,060 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 13:52:28,068 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 13:52:28,069 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 13:52:28,091 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 13:52:28,092 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 13:52:28,092 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 13:52:28,093 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 13:52:28,093 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 13:52:28,094 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 13:52:28,094 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 13:52:28,094 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 13:52:28,094 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 13:52:28,094 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 13:52:28,094 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 13:52:28,094 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 13:52:28,095 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 13:52:28,095 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 13:52:28,095 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 13:52:28,095 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 13:52:28,095 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 13:52:28,095 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 13:52:28,095 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 13:52:28,095 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 13:52:28,095 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 13:52:28,095 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 13:52:28,096 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 13:52:28,096 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 13:52:28,096 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 13:52:28,096 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 13:52:28,096 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 13:52:28,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:52:28,096 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 13:52:28,097 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 13:52:28,097 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 13:52:28,097 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 13:52:28,097 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 13:52:28,097 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 13:52:28,097 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 13:52:28,097 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 13:52:28,097 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 13:52:28,097 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 13:52:28,097 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a [2025-03-03 13:52:28,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 13:52:28,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 13:52:28,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 13:52:28,309 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 13:52:28,309 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 13:52:28,310 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2025-03-03 13:52:29,425 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae7c8261d/1a3b1fda41bd4bb2bb426c15d8feb2d4/FLAG39bdc82da [2025-03-03 13:52:29,643 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 13:52:29,646 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2025-03-03 13:52:29,676 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae7c8261d/1a3b1fda41bd4bb2bb426c15d8feb2d4/FLAG39bdc82da [2025-03-03 13:52:29,692 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae7c8261d/1a3b1fda41bd4bb2bb426c15d8feb2d4 [2025-03-03 13:52:29,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 13:52:29,697 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 13:52:29,698 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 13:52:29,699 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 13:52:29,702 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 13:52:29,703 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:52:29" (1/1) ... [2025-03-03 13:52:29,703 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b9bd829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:29, skipping insertion in model container [2025-03-03 13:52:29,704 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:52:29" (1/1) ... [2025-03-03 13:52:29,714 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 13:52:29,816 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/egcd3-ll_valuebound10.c[490,503] [2025-03-03 13:52:29,830 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:52:29,835 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 13:52:29,842 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/egcd3-ll_valuebound10.c[490,503] [2025-03-03 13:52:29,848 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:52:29,857 INFO L204 MainTranslator]: Completed translation [2025-03-03 13:52:29,857 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:29 WrapperNode [2025-03-03 13:52:29,857 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 13:52:29,858 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 13:52:29,858 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 13:52:29,858 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 13:52:29,862 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:29" (1/1) ... [2025-03-03 13:52:29,870 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:29" (1/1) ... [2025-03-03 13:52:29,879 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2025-03-03 13:52:29,879 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 13:52:29,880 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 13:52:29,880 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 13:52:29,880 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 13:52:29,884 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:29" (1/1) ... [2025-03-03 13:52:29,885 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:29" (1/1) ... [2025-03-03 13:52:29,885 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:29" (1/1) ... [2025-03-03 13:52:29,891 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]. [2025-03-03 13:52:29,891 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:29" (1/1) ... [2025-03-03 13:52:29,892 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:29" (1/1) ... [2025-03-03 13:52:29,893 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:29" (1/1) ... [2025-03-03 13:52:29,894 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:29" (1/1) ... [2025-03-03 13:52:29,898 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:29" (1/1) ... [2025-03-03 13:52:29,898 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:29" (1/1) ... [2025-03-03 13:52:29,899 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 13:52:29,900 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 13:52:29,900 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 13:52:29,900 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 13:52:29,901 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:29" (1/1) ... [2025-03-03 13:52:29,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:52:29,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:29,924 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) [2025-03-03 13:52:29,927 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 [2025-03-03 13:52:29,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 13:52:29,945 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-03 13:52:29,945 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-03 13:52:29,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 13:52:29,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 13:52:29,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 13:52:29,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-03 13:52:29,945 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-03 13:52:29,990 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 13:52:29,991 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 13:52:30,131 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-03-03 13:52:30,131 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 13:52:30,140 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 13:52:30,141 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 13:52:30,141 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:52:30 BoogieIcfgContainer [2025-03-03 13:52:30,141 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 13:52:30,144 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 13:52:30,144 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 13:52:30,147 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 13:52:30,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 01:52:29" (1/3) ... [2025-03-03 13:52:30,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10086f19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:52:30, skipping insertion in model container [2025-03-03 13:52:30,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:29" (2/3) ... [2025-03-03 13:52:30,149 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10086f19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:52:30, skipping insertion in model container [2025-03-03 13:52:30,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:52:30" (3/3) ... [2025-03-03 13:52:30,150 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.c [2025-03-03 13:52:30,161 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 13:52:30,162 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd3-ll_valuebound10.c that has 3 procedures, 32 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-03 13:52:30,198 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 13:52:30,205 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;@5fd27623, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 13:52:30,205 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 13:52:30,207 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-03-03 13:52:30,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-03 13:52:30,211 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:30,211 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:30,212 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:30,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:30,215 INFO L85 PathProgramCache]: Analyzing trace with hash -743363080, now seen corresponding path program 1 times [2025-03-03 13:52:30,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:30,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487875762] [2025-03-03 13:52:30,220 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:30,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:30,265 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-03 13:52:30,274 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:52:30,274 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:30,274 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 13:52:30,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:30,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487875762] [2025-03-03 13:52:30,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487875762] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:30,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019805645] [2025-03-03 13:52:30,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:30,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:30,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:30,311 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) [2025-03-03 13:52:30,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 13:52:30,342 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-03 13:52:30,362 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:52:30,363 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:30,363 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:30,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-03 13:52:30,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 13:52:30,374 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:52:30,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019805645] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:30,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:52:30,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-03 13:52:30,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471814904] [2025-03-03 13:52:30,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:30,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-03 13:52:30,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:30,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-03 13:52:30,391 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 13:52:30,392 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 13:52:30,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:30,403 INFO L93 Difference]: Finished difference Result 61 states and 97 transitions. [2025-03-03 13:52:30,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-03 13:52:30,404 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2025-03-03 13:52:30,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:30,408 INFO L225 Difference]: With dead ends: 61 [2025-03-03 13:52:30,408 INFO L226 Difference]: Without dead ends: 28 [2025-03-03 13:52:30,409 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 13:52:30,411 INFO L435 NwaCegarLoop]: 41 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, 41 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 [2025-03-03 13:52:30,411 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:52:30,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-03-03 13:52:30,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2025-03-03 13:52:30,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 13:52:30,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2025-03-03 13:52:30,431 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 29 [2025-03-03 13:52:30,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:30,431 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2025-03-03 13:52:30,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 13:52:30,431 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2025-03-03 13:52:30,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-03 13:52:30,432 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:30,432 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:30,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:30,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-03 13:52:30,633 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:30,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:30,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1683090086, now seen corresponding path program 1 times [2025-03-03 13:52:30,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:30,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350632317] [2025-03-03 13:52:30,634 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:30,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:30,642 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-03 13:52:30,661 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:52:30,662 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:30,662 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 13:52:30,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:30,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350632317] [2025-03-03 13:52:30,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350632317] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:30,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:52:30,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-03 13:52:30,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54020911] [2025-03-03 13:52:30,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:30,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-03 13:52:30,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:30,834 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-03 13:52:30,834 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:52:30,834 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:30,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:30,927 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2025-03-03 13:52:30,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 13:52:30,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2025-03-03 13:52:30,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:30,928 INFO L225 Difference]: With dead ends: 44 [2025-03-03 13:52:30,928 INFO L226 Difference]: Without dead ends: 37 [2025-03-03 13:52:30,929 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:52:30,930 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:30,930 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 90 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:52:30,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-03 13:52:30,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2025-03-03 13:52:30,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 13:52:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2025-03-03 13:52:30,940 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 29 [2025-03-03 13:52:30,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:30,941 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2025-03-03 13:52:30,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:30,941 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2025-03-03 13:52:30,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-03 13:52:30,941 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:30,942 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:30,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 13:52:30,942 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:30,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:30,943 INFO L85 PathProgramCache]: Analyzing trace with hash -602638456, now seen corresponding path program 1 times [2025-03-03 13:52:30,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:30,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565368889] [2025-03-03 13:52:30,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:30,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:30,952 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-03 13:52:30,965 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-03 13:52:30,967 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:30,967 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:30,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259796696] [2025-03-03 13:52:30,969 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:30,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:30,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:30,973 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) [2025-03-03 13:52:30,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 13:52:30,999 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-03 13:52:31,011 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-03 13:52:31,011 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:31,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:31,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-03 13:52:31,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:52:31,084 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:52:31,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:31,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565368889] [2025-03-03 13:52:31,085 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:31,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259796696] [2025-03-03 13:52:31,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259796696] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:31,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:52:31,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:52:31,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684381350] [2025-03-03 13:52:31,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:31,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:52:31,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:31,087 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:52:31,087 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:52:31,088 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:31,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:31,126 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2025-03-03 13:52:31,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:52:31,126 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2025-03-03 13:52:31,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:31,127 INFO L225 Difference]: With dead ends: 43 [2025-03-03 13:52:31,127 INFO L226 Difference]: Without dead ends: 41 [2025-03-03 13:52:31,127 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:52:31,128 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:31,128 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:52:31,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-03-03 13:52:31,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2025-03-03 13:52:31,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-03 13:52:31,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2025-03-03 13:52:31,135 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 30 [2025-03-03 13:52:31,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:31,135 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2025-03-03 13:52:31,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:31,136 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2025-03-03 13:52:31,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-03 13:52:31,136 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:31,136 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:31,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:31,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-03 13:52:31,340 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:31,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:31,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1811518815, now seen corresponding path program 1 times [2025-03-03 13:52:31,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:31,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457060191] [2025-03-03 13:52:31,341 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:31,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:31,345 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-03 13:52:31,355 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-03 13:52:31,355 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:31,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 13:52:31,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:31,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457060191] [2025-03-03 13:52:31,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457060191] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:31,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145579112] [2025-03-03 13:52:31,523 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:31,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:31,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:31,525 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) [2025-03-03 13:52:31,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 13:52:31,553 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-03 13:52:31,566 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-03 13:52:31,566 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:31,566 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:31,567 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-03 13:52:31,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 13:52:31,616 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 13:52:31,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145579112] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:31,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:52:31,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2025-03-03 13:52:31,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138781947] [2025-03-03 13:52:31,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:31,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 13:52:31,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:31,705 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 13:52:31,705 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-03-03 13:52:31,705 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 13:52:31,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:31,846 INFO L93 Difference]: Finished difference Result 82 states and 122 transitions. [2025-03-03 13:52:31,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 13:52:31,846 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2025-03-03 13:52:31,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:31,847 INFO L225 Difference]: With dead ends: 82 [2025-03-03 13:52:31,847 INFO L226 Difference]: Without dead ends: 75 [2025-03-03 13:52:31,847 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-03-03 13:52:31,848 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 67 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:31,848 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 166 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:52:31,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2025-03-03 13:52:31,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2025-03-03 13:52:31,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 34 states have internal predecessors, (45), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-03 13:52:31,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 78 transitions. [2025-03-03 13:52:31,860 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 78 transitions. Word has length 32 [2025-03-03 13:52:31,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:31,860 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 78 transitions. [2025-03-03 13:52:31,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 13:52:31,860 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 78 transitions. [2025-03-03 13:52:31,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-03 13:52:31,861 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:31,861 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:31,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:32,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:32,068 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:32,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:32,068 INFO L85 PathProgramCache]: Analyzing trace with hash 356055075, now seen corresponding path program 1 times [2025-03-03 13:52:32,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:32,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016701455] [2025-03-03 13:52:32,069 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:32,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:32,073 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-03 13:52:32,080 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:52:32,080 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:32,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:32,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059574212] [2025-03-03 13:52:32,081 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:32,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:32,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:32,083 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) [2025-03-03 13:52:32,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 13:52:32,109 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-03 13:52:32,124 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:52:32,124 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:32,124 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:32,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-03 13:52:32,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:52:32,192 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:52:32,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:32,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016701455] [2025-03-03 13:52:32,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:32,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059574212] [2025-03-03 13:52:32,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059574212] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:32,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:52:32,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2025-03-03 13:52:32,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330717415] [2025-03-03 13:52:32,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:32,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-03 13:52:32,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:32,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-03 13:52:32,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:52:32,299 INFO L87 Difference]: Start difference. First operand 54 states and 78 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:32,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:32,411 INFO L93 Difference]: Finished difference Result 83 states and 120 transitions. [2025-03-03 13:52:32,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 13:52:32,412 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2025-03-03 13:52:32,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:32,414 INFO L225 Difference]: With dead ends: 83 [2025-03-03 13:52:32,414 INFO L226 Difference]: Without dead ends: 81 [2025-03-03 13:52:32,414 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-03-03 13:52:32,414 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 16 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:32,415 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 246 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:52:32,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-03-03 13:52:32,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2025-03-03 13:52:32,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 48 states have internal predecessors, (65), 25 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2025-03-03 13:52:32,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 114 transitions. [2025-03-03 13:52:32,436 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 114 transitions. Word has length 33 [2025-03-03 13:52:32,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:32,436 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 114 transitions. [2025-03-03 13:52:32,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:32,437 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 114 transitions. [2025-03-03 13:52:32,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-03 13:52:32,437 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:32,437 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:32,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:32,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:32,642 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:32,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:32,643 INFO L85 PathProgramCache]: Analyzing trace with hash -737481304, now seen corresponding path program 2 times [2025-03-03 13:52:32,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:32,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619570951] [2025-03-03 13:52:32,643 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:32,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:32,647 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-03-03 13:52:32,653 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 13:52:32,653 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:32,653 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:52:32,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:32,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619570951] [2025-03-03 13:52:32,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619570951] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:32,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:52:32,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:52:32,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805873351] [2025-03-03 13:52:32,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:32,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:52:32,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:32,727 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:52:32,728 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:52:32,728 INFO L87 Difference]: Start difference. First operand 77 states and 114 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:32,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:32,803 INFO L93 Difference]: Finished difference Result 116 states and 178 transitions. [2025-03-03 13:52:32,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 13:52:32,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2025-03-03 13:52:32,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:32,806 INFO L225 Difference]: With dead ends: 116 [2025-03-03 13:52:32,806 INFO L226 Difference]: Without dead ends: 87 [2025-03-03 13:52:32,806 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-03 13:52:32,807 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:32,807 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 122 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:52:32,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-03-03 13:52:32,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 58. [2025-03-03 13:52:32,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 37 states have internal predecessors, (46), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-03 13:52:32,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 79 transitions. [2025-03-03 13:52:32,820 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 79 transitions. Word has length 36 [2025-03-03 13:52:32,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:32,820 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 79 transitions. [2025-03-03 13:52:32,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 79 transitions. [2025-03-03 13:52:32,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-03 13:52:32,821 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:32,821 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:32,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-03 13:52:32,821 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:32,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:32,821 INFO L85 PathProgramCache]: Analyzing trace with hash 437747302, now seen corresponding path program 1 times [2025-03-03 13:52:32,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:32,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593702016] [2025-03-03 13:52:32,822 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:32,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:32,825 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-03 13:52:32,831 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-03 13:52:32,832 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:32,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:32,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95682748] [2025-03-03 13:52:32,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:32,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:32,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:32,834 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) [2025-03-03 13:52:32,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 13:52:32,856 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-03 13:52:32,868 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-03 13:52:32,868 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:32,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:32,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-03 13:52:32,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:52:32,950 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:32,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:32,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593702016] [2025-03-03 13:52:32,983 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:32,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95682748] [2025-03-03 13:52:32,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95682748] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:32,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:52:32,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2025-03-03 13:52:32,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802510396] [2025-03-03 13:52:32,983 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:32,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 13:52:32,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:32,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 13:52:32,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:52:32,984 INFO L87 Difference]: Start difference. First operand 58 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-03 13:52:33,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:33,110 INFO L93 Difference]: Finished difference Result 79 states and 110 transitions. [2025-03-03 13:52:33,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 13:52:33,111 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2025-03-03 13:52:33,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:33,111 INFO L225 Difference]: With dead ends: 79 [2025-03-03 13:52:33,111 INFO L226 Difference]: Without dead ends: 77 [2025-03-03 13:52:33,112 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-03 13:52:33,112 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 21 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:33,112 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 179 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:52:33,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-03-03 13:52:33,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2025-03-03 13:52:33,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2025-03-03 13:52:33,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2025-03-03 13:52:33,131 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 38 [2025-03-03 13:52:33,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:33,131 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2025-03-03 13:52:33,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-03 13:52:33,133 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2025-03-03 13:52:33,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-03 13:52:33,134 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:33,134 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:33,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-03 13:52:33,334 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 [2025-03-03 13:52:33,334 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:33,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:33,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1953213885, now seen corresponding path program 1 times [2025-03-03 13:52:33,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:33,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046748701] [2025-03-03 13:52:33,335 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:33,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:33,338 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-03 13:52:33,344 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-03 13:52:33,344 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:33,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:33,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106809515] [2025-03-03 13:52:33,344 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:33,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:33,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:33,346 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) [2025-03-03 13:52:33,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 13:52:33,370 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-03 13:52:33,385 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-03 13:52:33,386 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:33,386 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:33,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 13:52:33,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-03-03 13:52:33,437 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:52:33,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:33,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046748701] [2025-03-03 13:52:33,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:33,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106809515] [2025-03-03 13:52:33,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106809515] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:33,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:52:33,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:52:33,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419832988] [2025-03-03 13:52:33,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:33,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:52:33,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:33,438 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:52:33,438 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:52:33,438 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-03 13:52:33,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:33,487 INFO L93 Difference]: Finished difference Result 104 states and 148 transitions. [2025-03-03 13:52:33,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:52:33,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2025-03-03 13:52:33,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:33,490 INFO L225 Difference]: With dead ends: 104 [2025-03-03 13:52:33,490 INFO L226 Difference]: Without dead ends: 102 [2025-03-03 13:52:33,490 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:52:33,491 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:33,491 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:52:33,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-03-03 13:52:33,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2025-03-03 13:52:33,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 54 states have internal predecessors, (69), 37 states have call successors, (37), 7 states have call predecessors, (37), 7 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2025-03-03 13:52:33,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 142 transitions. [2025-03-03 13:52:33,505 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 142 transitions. Word has length 43 [2025-03-03 13:52:33,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:33,506 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 142 transitions. [2025-03-03 13:52:33,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-03 13:52:33,506 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 142 transitions. [2025-03-03 13:52:33,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-03 13:52:33,507 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:33,507 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:33,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:33,707 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 [2025-03-03 13:52:33,707 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:33,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:33,708 INFO L85 PathProgramCache]: Analyzing trace with hash -762809663, now seen corresponding path program 1 times [2025-03-03 13:52:33,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:33,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398646346] [2025-03-03 13:52:33,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:33,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:33,711 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-03 13:52:33,715 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:52:33,716 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:33,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:33,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110694447] [2025-03-03 13:52:33,716 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:33,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:33,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:33,718 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) [2025-03-03 13:52:33,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 13:52:33,747 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-03 13:52:33,760 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:52:33,760 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:33,760 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:33,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 13:52:33,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-03 13:52:33,789 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:52:33,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:33,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398646346] [2025-03-03 13:52:33,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:33,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110694447] [2025-03-03 13:52:33,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110694447] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:33,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:52:33,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:52:33,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998444317] [2025-03-03 13:52:33,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:33,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:52:33,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:33,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:52:33,790 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:52:33,791 INFO L87 Difference]: Start difference. First operand 98 states and 142 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-03 13:52:33,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:33,843 INFO L93 Difference]: Finished difference Result 148 states and 231 transitions. [2025-03-03 13:52:33,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:52:33,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2025-03-03 13:52:33,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:33,845 INFO L225 Difference]: With dead ends: 148 [2025-03-03 13:52:33,845 INFO L226 Difference]: Without dead ends: 146 [2025-03-03 13:52:33,845 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:52:33,845 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:33,845 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 120 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:52:33,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2025-03-03 13:52:33,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 134. [2025-03-03 13:52:33,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 65 states have internal predecessors, (72), 69 states have call successors, (69), 8 states have call predecessors, (69), 8 states have return successors, (68), 60 states have call predecessors, (68), 68 states have call successors, (68) [2025-03-03 13:52:33,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 209 transitions. [2025-03-03 13:52:33,874 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 209 transitions. Word has length 45 [2025-03-03 13:52:33,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:33,874 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 209 transitions. [2025-03-03 13:52:33,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-03 13:52:33,874 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 209 transitions. [2025-03-03 13:52:33,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-03 13:52:33,876 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:33,876 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:33,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-03 13:52:34,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:34,077 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:34,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:34,077 INFO L85 PathProgramCache]: Analyzing trace with hash 17136405, now seen corresponding path program 1 times [2025-03-03 13:52:34,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:34,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400261768] [2025-03-03 13:52:34,077 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:34,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:34,083 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-03 13:52:34,102 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-03 13:52:34,102 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:34,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:34,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338560872] [2025-03-03 13:52:34,103 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:34,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:34,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:34,107 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:34,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 13:52:34,136 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-03 13:52:34,153 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-03 13:52:34,153 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:34,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:34,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-03 13:52:34,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-03-03 13:52:34,614 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-03 13:52:34,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:34,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400261768] [2025-03-03 13:52:34,917 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:34,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338560872] [2025-03-03 13:52:34,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338560872] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:34,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:52:34,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2025-03-03 13:52:34,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656409549] [2025-03-03 13:52:34,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:34,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 13:52:34,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:34,918 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 13:52:34,918 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:52:34,918 INFO L87 Difference]: Start difference. First operand 134 states and 209 transitions. Second operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-03 13:52:36,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:36,775 INFO L93 Difference]: Finished difference Result 358 states and 580 transitions. [2025-03-03 13:52:36,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-03 13:52:36,776 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 55 [2025-03-03 13:52:36,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:36,780 INFO L225 Difference]: With dead ends: 358 [2025-03-03 13:52:36,780 INFO L226 Difference]: Without dead ends: 276 [2025-03-03 13:52:36,782 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2025-03-03 13:52:36,784 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 125 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:36,784 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 293 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-03 13:52:36,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2025-03-03 13:52:36,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 204. [2025-03-03 13:52:36,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 99 states have (on average 1.3131313131313131) internal successors, (130), 106 states have internal predecessors, (130), 93 states have call successors, (93), 11 states have call predecessors, (93), 11 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2025-03-03 13:52:36,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 315 transitions. [2025-03-03 13:52:36,842 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 315 transitions. Word has length 55 [2025-03-03 13:52:36,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:36,843 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 315 transitions. [2025-03-03 13:52:36,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-03 13:52:36,843 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 315 transitions. [2025-03-03 13:52:36,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-03-03 13:52:36,843 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:36,844 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:36,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-03 13:52:37,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-03 13:52:37,049 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:37,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:37,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1304203768, now seen corresponding path program 1 times [2025-03-03 13:52:37,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:37,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642402125] [2025-03-03 13:52:37,049 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:37,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:37,053 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-03-03 13:52:37,069 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-03-03 13:52:37,069 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:37,069 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:37,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875351198] [2025-03-03 13:52:37,071 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:37,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:37,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:37,073 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:37,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 13:52:37,096 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-03-03 13:52:37,113 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-03-03 13:52:37,113 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:37,113 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:37,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-03 13:52:37,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-03 13:52:37,497 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2025-03-03 13:52:37,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:37,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642402125] [2025-03-03 13:52:37,618 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:37,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875351198] [2025-03-03 13:52:37,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875351198] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:37,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:52:37,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2025-03-03 13:52:37,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604662222] [2025-03-03 13:52:37,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:37,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 13:52:37,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:37,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 13:52:37,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2025-03-03 13:52:37,621 INFO L87 Difference]: Start difference. First operand 204 states and 315 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-03 13:52:38,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:38,818 INFO L93 Difference]: Finished difference Result 255 states and 394 transitions. [2025-03-03 13:52:38,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 13:52:38,819 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 59 [2025-03-03 13:52:38,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:38,820 INFO L225 Difference]: With dead ends: 255 [2025-03-03 13:52:38,820 INFO L226 Difference]: Without dead ends: 253 [2025-03-03 13:52:38,821 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 13:52:38,821 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 90 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:38,821 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 353 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-03 13:52:38,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2025-03-03 13:52:38,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 212. [2025-03-03 13:52:38,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 105 states have (on average 1.2952380952380953) internal successors, (136), 112 states have internal predecessors, (136), 93 states have call successors, (93), 13 states have call predecessors, (93), 13 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2025-03-03 13:52:38,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 321 transitions. [2025-03-03 13:52:38,885 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 321 transitions. Word has length 59 [2025-03-03 13:52:38,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:38,885 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 321 transitions. [2025-03-03 13:52:38,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-03 13:52:38,885 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 321 transitions. [2025-03-03 13:52:38,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-03-03 13:52:38,886 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:38,886 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:38,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-03 13:52:39,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:39,087 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:39,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:39,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1091825569, now seen corresponding path program 2 times [2025-03-03 13:52:39,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:39,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559371477] [2025-03-03 13:52:39,088 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:39,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:39,091 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 64 statements into 2 equivalence classes. [2025-03-03 13:52:39,105 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 64 of 64 statements. [2025-03-03 13:52:39,105 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:39,105 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:39,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865314760] [2025-03-03 13:52:39,106 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:39,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:39,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:39,108 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:39,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 13:52:39,129 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 64 statements into 2 equivalence classes. [2025-03-03 13:52:39,146 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 64 of 64 statements. [2025-03-03 13:52:39,146 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:39,146 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:39,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 65 conjuncts are in the unsatisfiable core [2025-03-03 13:52:39,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2025-03-03 13:52:39,593 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2025-03-03 13:52:40,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:40,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559371477] [2025-03-03 13:52:40,113 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:40,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865314760] [2025-03-03 13:52:40,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865314760] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:40,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:52:40,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2025-03-03 13:52:40,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972516201] [2025-03-03 13:52:40,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:40,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-03 13:52:40,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:40,114 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-03 13:52:40,114 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2025-03-03 13:52:40,115 INFO L87 Difference]: Start difference. First operand 212 states and 321 transitions. Second operand has 31 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 27 states have internal predecessors, (46), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2025-03-03 13:52:43,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:43,217 INFO L93 Difference]: Finished difference Result 388 states and 583 transitions. [2025-03-03 13:52:43,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-03-03 13:52:43,221 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 27 states have internal predecessors, (46), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 64 [2025-03-03 13:52:43,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:43,223 INFO L225 Difference]: With dead ends: 388 [2025-03-03 13:52:43,223 INFO L226 Difference]: Without dead ends: 327 [2025-03-03 13:52:43,225 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=678, Invalid=2862, Unknown=0, NotChecked=0, Total=3540 [2025-03-03 13:52:43,225 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 157 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:43,226 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 368 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-03-03 13:52:43,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2025-03-03 13:52:43,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 280. [2025-03-03 13:52:43,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 139 states have (on average 1.2805755395683454) internal successors, (178), 150 states have internal predecessors, (178), 121 states have call successors, (121), 19 states have call predecessors, (121), 19 states have return successors, (120), 110 states have call predecessors, (120), 120 states have call successors, (120) [2025-03-03 13:52:43,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 419 transitions. [2025-03-03 13:52:43,350 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 419 transitions. Word has length 64 [2025-03-03 13:52:43,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:43,350 INFO L471 AbstractCegarLoop]: Abstraction has 280 states and 419 transitions. [2025-03-03 13:52:43,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 27 states have internal predecessors, (46), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2025-03-03 13:52:43,351 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 419 transitions. [2025-03-03 13:52:43,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-03-03 13:52:43,352 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:43,352 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:43,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-03 13:52:43,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-03 13:52:43,555 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:43,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:43,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1883736123, now seen corresponding path program 1 times [2025-03-03 13:52:43,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:43,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081551871] [2025-03-03 13:52:43,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:43,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:43,560 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-03-03 13:52:43,578 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-03-03 13:52:43,578 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:43,578 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:43,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223738609] [2025-03-03 13:52:43,579 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:43,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:43,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:43,581 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:43,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 13:52:43,607 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-03-03 13:52:43,631 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-03-03 13:52:43,631 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:43,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:43,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 66 conjuncts are in the unsatisfiable core [2025-03-03 13:52:43,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2025-03-03 13:52:44,282 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:44,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:44,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081551871] [2025-03-03 13:52:44,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:44,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223738609] [2025-03-03 13:52:44,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223738609] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:44,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:52:44,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2025-03-03 13:52:44,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020147718] [2025-03-03 13:52:44,575 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:44,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 13:52:44,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:44,576 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 13:52:44,576 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2025-03-03 13:52:44,576 INFO L87 Difference]: Start difference. First operand 280 states and 419 transitions. Second operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2025-03-03 13:52:45,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:45,361 INFO L93 Difference]: Finished difference Result 357 states and 538 transitions. [2025-03-03 13:52:45,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 13:52:45,362 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2025-03-03 13:52:45,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:45,365 INFO L225 Difference]: With dead ends: 357 [2025-03-03 13:52:45,365 INFO L226 Difference]: Without dead ends: 350 [2025-03-03 13:52:45,365 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2025-03-03 13:52:45,366 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 64 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:45,366 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 431 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 13:52:45,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2025-03-03 13:52:45,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 343. [2025-03-03 13:52:45,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 163 states have (on average 1.294478527607362) internal successors, (211), 177 states have internal predecessors, (211), 157 states have call successors, (157), 22 states have call predecessors, (157), 22 states have return successors, (156), 143 states have call predecessors, (156), 156 states have call successors, (156) [2025-03-03 13:52:45,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 524 transitions. [2025-03-03 13:52:45,494 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 524 transitions. Word has length 79 [2025-03-03 13:52:45,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:45,494 INFO L471 AbstractCegarLoop]: Abstraction has 343 states and 524 transitions. [2025-03-03 13:52:45,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2025-03-03 13:52:45,494 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 524 transitions. [2025-03-03 13:52:45,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2025-03-03 13:52:45,495 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:45,495 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:45,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:45,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-03 13:52:45,699 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:45,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:45,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1658792811, now seen corresponding path program 2 times [2025-03-03 13:52:45,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:45,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681044937] [2025-03-03 13:52:45,700 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:45,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:45,704 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 84 statements into 2 equivalence classes. [2025-03-03 13:52:45,710 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 84 of 84 statements. [2025-03-03 13:52:45,711 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:45,711 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2025-03-03 13:52:45,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:45,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681044937] [2025-03-03 13:52:45,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681044937] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:45,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736084595] [2025-03-03 13:52:45,875 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:45,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:45,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:45,877 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:45,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 13:52:45,903 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 84 statements into 2 equivalence classes. [2025-03-03 13:52:45,922 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 84 of 84 statements. [2025-03-03 13:52:45,923 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:45,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:45,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 13:52:45,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2025-03-03 13:52:45,990 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2025-03-03 13:52:46,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736084595] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:46,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:52:46,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2025-03-03 13:52:46,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090275626] [2025-03-03 13:52:46,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:46,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-03 13:52:46,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:46,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-03 13:52:46,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2025-03-03 13:52:46,078 INFO L87 Difference]: Start difference. First operand 343 states and 524 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2025-03-03 13:52:46,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:46,513 INFO L93 Difference]: Finished difference Result 580 states and 882 transitions. [2025-03-03 13:52:46,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-03 13:52:46,514 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 84 [2025-03-03 13:52:46,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:46,516 INFO L225 Difference]: With dead ends: 580 [2025-03-03 13:52:46,516 INFO L226 Difference]: Without dead ends: 357 [2025-03-03 13:52:46,517 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 164 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2025-03-03 13:52:46,517 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 65 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:46,517 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 331 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:52:46,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2025-03-03 13:52:46,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 262. [2025-03-03 13:52:46,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 137 states have (on average 1.2627737226277371) internal successors, (173), 139 states have internal predecessors, (173), 103 states have call successors, (103), 21 states have call predecessors, (103), 21 states have return successors, (102), 101 states have call predecessors, (102), 102 states have call successors, (102) [2025-03-03 13:52:46,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 378 transitions. [2025-03-03 13:52:46,611 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 378 transitions. Word has length 84 [2025-03-03 13:52:46,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:46,612 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 378 transitions. [2025-03-03 13:52:46,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2025-03-03 13:52:46,612 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 378 transitions. [2025-03-03 13:52:46,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2025-03-03 13:52:46,613 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:46,613 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:46,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:46,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-03 13:52:46,813 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:46,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:46,814 INFO L85 PathProgramCache]: Analyzing trace with hash 996745083, now seen corresponding path program 1 times [2025-03-03 13:52:46,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:46,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054692706] [2025-03-03 13:52:46,814 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:46,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:46,818 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 92 statements into 1 equivalence classes. [2025-03-03 13:52:46,831 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 92 of 92 statements. [2025-03-03 13:52:46,831 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:46,831 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:46,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315051861] [2025-03-03 13:52:46,835 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:46,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:46,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:46,837 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:46,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 13:52:46,861 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 92 statements into 1 equivalence classes. [2025-03-03 13:52:46,879 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 92 of 92 statements. [2025-03-03 13:52:46,879 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:46,879 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:46,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 13:52:46,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2025-03-03 13:52:46,950 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:47,016 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2025-03-03 13:52:47,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:47,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054692706] [2025-03-03 13:52:47,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:47,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315051861] [2025-03-03 13:52:47,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315051861] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:47,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:52:47,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2025-03-03 13:52:47,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780367100] [2025-03-03 13:52:47,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:47,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:52:47,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:47,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:52:47,017 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2025-03-03 13:52:47,017 INFO L87 Difference]: Start difference. First operand 262 states and 378 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2025-03-03 13:52:47,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:47,159 INFO L93 Difference]: Finished difference Result 272 states and 386 transitions. [2025-03-03 13:52:47,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:52:47,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 92 [2025-03-03 13:52:47,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:47,162 INFO L225 Difference]: With dead ends: 272 [2025-03-03 13:52:47,162 INFO L226 Difference]: Without dead ends: 270 [2025-03-03 13:52:47,163 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2025-03-03 13:52:47,163 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:47,163 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 116 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:52:47,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2025-03-03 13:52:47,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2025-03-03 13:52:47,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 143 states have (on average 1.2517482517482517) internal successors, (179), 145 states have internal predecessors, (179), 103 states have call successors, (103), 23 states have call predecessors, (103), 23 states have return successors, (102), 101 states have call predecessors, (102), 102 states have call successors, (102) [2025-03-03 13:52:47,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 384 transitions. [2025-03-03 13:52:47,251 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 384 transitions. Word has length 92 [2025-03-03 13:52:47,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:47,251 INFO L471 AbstractCegarLoop]: Abstraction has 270 states and 384 transitions. [2025-03-03 13:52:47,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2025-03-03 13:52:47,252 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 384 transitions. [2025-03-03 13:52:47,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2025-03-03 13:52:47,252 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:47,252 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:47,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:47,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-03 13:52:47,453 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:47,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:47,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1015960117, now seen corresponding path program 2 times [2025-03-03 13:52:47,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:47,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890051396] [2025-03-03 13:52:47,453 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:47,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:47,457 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 97 statements into 2 equivalence classes. [2025-03-03 13:52:47,467 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 97 of 97 statements. [2025-03-03 13:52:47,467 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:47,467 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:47,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785726857] [2025-03-03 13:52:47,468 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:47,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:47,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:47,470 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:47,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-03 13:52:47,501 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 97 statements into 2 equivalence classes. [2025-03-03 13:52:47,522 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 97 of 97 statements. [2025-03-03 13:52:47,522 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:47,522 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:47,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-03 13:52:47,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2025-03-03 13:52:47,939 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2025-03-03 13:52:48,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:48,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890051396] [2025-03-03 13:52:48,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:48,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785726857] [2025-03-03 13:52:48,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785726857] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:48,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:52:48,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2025-03-03 13:52:48,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022671792] [2025-03-03 13:52:48,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:48,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 13:52:48,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:48,348 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 13:52:48,348 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2025-03-03 13:52:48,349 INFO L87 Difference]: Start difference. First operand 270 states and 384 transitions. Second operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2025-03-03 13:52:52,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:52,685 INFO L93 Difference]: Finished difference Result 459 states and 701 transitions. [2025-03-03 13:52:52,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2025-03-03 13:52:52,692 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 97 [2025-03-03 13:52:52,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:52,694 INFO L225 Difference]: With dead ends: 459 [2025-03-03 13:52:52,694 INFO L226 Difference]: Without dead ends: 451 [2025-03-03 13:52:52,695 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=867, Invalid=4103, Unknown=0, NotChecked=0, Total=4970 [2025-03-03 13:52:52,699 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 130 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:52,699 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 779 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2025-03-03 13:52:52,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2025-03-03 13:52:52,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 313. [2025-03-03 13:52:52,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 157 states have (on average 1.286624203821656) internal successors, (202), 159 states have internal predecessors, (202), 131 states have call successors, (131), 24 states have call predecessors, (131), 24 states have return successors, (130), 129 states have call predecessors, (130), 130 states have call successors, (130) [2025-03-03 13:52:52,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 463 transitions. [2025-03-03 13:52:52,826 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 463 transitions. Word has length 97 [2025-03-03 13:52:52,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:52,827 INFO L471 AbstractCegarLoop]: Abstraction has 313 states and 463 transitions. [2025-03-03 13:52:52,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2025-03-03 13:52:52,827 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 463 transitions. [2025-03-03 13:52:52,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2025-03-03 13:52:52,828 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:52,828 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:52,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:53,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:53,029 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:53,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:53,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1295956566, now seen corresponding path program 3 times [2025-03-03 13:52:53,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:53,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67814495] [2025-03-03 13:52:53,029 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:52:53,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:53,036 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 99 statements into 11 equivalence classes. [2025-03-03 13:52:53,061 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 99 of 99 statements. [2025-03-03 13:52:53,062 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-03 13:52:53,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:53,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941624037] [2025-03-03 13:52:53,062 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:52:53,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:53,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:53,065 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:53,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-03 13:52:53,113 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 99 statements into 11 equivalence classes. [2025-03-03 13:52:53,157 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 63 of 99 statements. [2025-03-03 13:52:53,157 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-03 13:52:53,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:53,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 67 conjuncts are in the unsatisfiable core [2025-03-03 13:52:53,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 80 proven. 29 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2025-03-03 13:52:53,991 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:54,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:54,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67814495] [2025-03-03 13:52:54,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:54,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941624037] [2025-03-03 13:52:54,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941624037] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:54,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:52:54,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2025-03-03 13:52:54,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697469761] [2025-03-03 13:52:54,583 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:54,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 13:52:54,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:54,583 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 13:52:54,583 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2025-03-03 13:52:54,583 INFO L87 Difference]: Start difference. First operand 313 states and 463 transitions. Second operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2025-03-03 13:52:55,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:55,197 INFO L93 Difference]: Finished difference Result 391 states and 569 transitions. [2025-03-03 13:52:55,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 13:52:55,198 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 99 [2025-03-03 13:52:55,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:55,199 INFO L225 Difference]: With dead ends: 391 [2025-03-03 13:52:55,199 INFO L226 Difference]: Without dead ends: 384 [2025-03-03 13:52:55,200 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 13:52:55,200 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 38 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:55,200 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 251 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 13:52:55,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2025-03-03 13:52:55,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 374. [2025-03-03 13:52:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 189 states have (on average 1.2857142857142858) internal successors, (243), 191 states have internal predecessors, (243), 155 states have call successors, (155), 29 states have call predecessors, (155), 29 states have return successors, (154), 153 states have call predecessors, (154), 154 states have call successors, (154) [2025-03-03 13:52:55,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 552 transitions. [2025-03-03 13:52:55,348 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 552 transitions. Word has length 99 [2025-03-03 13:52:55,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:55,348 INFO L471 AbstractCegarLoop]: Abstraction has 374 states and 552 transitions. [2025-03-03 13:52:55,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2025-03-03 13:52:55,349 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 552 transitions. [2025-03-03 13:52:55,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2025-03-03 13:52:55,351 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:55,351 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:55,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-03 13:52:55,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-03 13:52:55,552 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:55,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:55,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1346848239, now seen corresponding path program 4 times [2025-03-03 13:52:55,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:55,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061143639] [2025-03-03 13:52:55,552 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:52:55,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:55,556 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 102 statements into 2 equivalence classes. [2025-03-03 13:52:55,570 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 102 of 102 statements. [2025-03-03 13:52:55,570 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:52:55,570 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:55,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316939424] [2025-03-03 13:52:55,571 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:52:55,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:55,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:55,573 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:55,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-03 13:52:55,597 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 102 statements into 2 equivalence classes. [2025-03-03 13:52:55,622 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 99 of 102 statements. [2025-03-03 13:52:55,622 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 13:52:55,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:55,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 84 conjuncts are in the unsatisfiable core [2025-03-03 13:52:55,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:56,357 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 56 proven. 36 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2025-03-03 13:52:56,357 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 50 proven. 33 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2025-03-03 13:52:57,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:57,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061143639] [2025-03-03 13:52:57,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:57,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316939424] [2025-03-03 13:52:57,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316939424] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:57,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:52:57,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2025-03-03 13:52:57,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037100445] [2025-03-03 13:52:57,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:57,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-03 13:52:57,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:57,101 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-03 13:52:57,102 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 13:52:57,102 INFO L87 Difference]: Start difference. First operand 374 states and 552 transitions. Second operand has 36 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 34 states have internal predecessors, (52), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2025-03-03 13:53:09,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:09,179 INFO L93 Difference]: Finished difference Result 667 states and 984 transitions. [2025-03-03 13:53:09,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2025-03-03 13:53:09,180 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 34 states have internal predecessors, (52), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 102 [2025-03-03 13:53:09,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:09,183 INFO L225 Difference]: With dead ends: 667 [2025-03-03 13:53:09,183 INFO L226 Difference]: Without dead ends: 555 [2025-03-03 13:53:09,185 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3196 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=2161, Invalid=9395, Unknown=0, NotChecked=0, Total=11556 [2025-03-03 13:53:09,185 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 235 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:09,185 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 671 Invalid, 1837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 1389 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2025-03-03 13:53:09,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2025-03-03 13:53:09,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 484. [2025-03-03 13:53:09,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 248 states have (on average 1.282258064516129) internal successors, (318), 251 states have internal predecessors, (318), 201 states have call successors, (201), 34 states have call predecessors, (201), 34 states have return successors, (200), 198 states have call predecessors, (200), 200 states have call successors, (200) [2025-03-03 13:53:09,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 719 transitions. [2025-03-03 13:53:09,516 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 719 transitions. Word has length 102 [2025-03-03 13:53:09,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:09,516 INFO L471 AbstractCegarLoop]: Abstraction has 484 states and 719 transitions. [2025-03-03 13:53:09,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 34 states have internal predecessors, (52), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2025-03-03 13:53:09,517 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 719 transitions. [2025-03-03 13:53:09,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2025-03-03 13:53:09,518 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:09,518 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:09,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-03 13:53:09,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-03 13:53:09,722 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:09,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:09,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1473706161, now seen corresponding path program 5 times [2025-03-03 13:53:09,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:09,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102650751] [2025-03-03 13:53:09,723 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:53:09,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:09,727 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 102 statements into 11 equivalence classes. [2025-03-03 13:53:09,747 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 102 of 102 statements. [2025-03-03 13:53:09,747 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-03-03 13:53:09,747 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:53:09,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579169695] [2025-03-03 13:53:09,748 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:53:09,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:09,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:09,750 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:09,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-03 13:53:09,781 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 102 statements into 11 equivalence classes. [2025-03-03 13:53:09,845 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 102 of 102 statements. [2025-03-03 13:53:09,845 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-03-03 13:53:09,845 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:09,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 74 conjuncts are in the unsatisfiable core [2025-03-03 13:53:09,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 43 proven. 67 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2025-03-03 13:53:10,979 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:12,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:12,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102650751] [2025-03-03 13:53:12,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:53:12,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579169695] [2025-03-03 13:53:12,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579169695] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:12,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:53:12,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2025-03-03 13:53:12,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269821179] [2025-03-03 13:53:12,226 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:12,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 13:53:12,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:12,226 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 13:53:12,226 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2025-03-03 13:53:12,227 INFO L87 Difference]: Start difference. First operand 484 states and 719 transitions. Second operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-03 13:53:13,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:13,643 INFO L93 Difference]: Finished difference Result 555 states and 812 transitions. [2025-03-03 13:53:13,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-03 13:53:13,643 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 102 [2025-03-03 13:53:13,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:13,648 INFO L225 Difference]: With dead ends: 555 [2025-03-03 13:53:13,648 INFO L226 Difference]: Without dead ends: 548 [2025-03-03 13:53:13,649 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=202, Invalid=1358, Unknown=0, NotChecked=0, Total=1560 [2025-03-03 13:53:13,650 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 58 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:13,650 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 472 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-03 13:53:13,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2025-03-03 13:53:14,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 530. [2025-03-03 13:53:14,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 270 states have (on average 1.2814814814814814) internal successors, (346), 273 states have internal predecessors, (346), 221 states have call successors, (221), 38 states have call predecessors, (221), 38 states have return successors, (220), 218 states have call predecessors, (220), 220 states have call successors, (220) [2025-03-03 13:53:14,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 787 transitions. [2025-03-03 13:53:14,071 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 787 transitions. Word has length 102 [2025-03-03 13:53:14,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:14,071 INFO L471 AbstractCegarLoop]: Abstraction has 530 states and 787 transitions. [2025-03-03 13:53:14,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-03 13:53:14,071 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 787 transitions. [2025-03-03 13:53:14,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2025-03-03 13:53:14,072 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:14,072 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:14,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-03 13:53:14,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:14,273 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:14,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:14,273 INFO L85 PathProgramCache]: Analyzing trace with hash -721263382, now seen corresponding path program 6 times [2025-03-03 13:53:14,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:14,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738436187] [2025-03-03 13:53:14,273 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:53:14,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:14,278 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 105 statements into 8 equivalence classes. [2025-03-03 13:53:14,293 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 105 of 105 statements. [2025-03-03 13:53:14,297 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-03-03 13:53:14,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:53:14,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966869557] [2025-03-03 13:53:14,298 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:53:14,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:14,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:14,301 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:14,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-03 13:53:14,324 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 105 statements into 8 equivalence classes. [2025-03-03 13:53:14,355 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 87 of 105 statements. [2025-03-03 13:53:14,355 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-03 13:53:14,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:14,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 76 conjuncts are in the unsatisfiable core [2025-03-03 13:53:14,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:15,077 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 38 proven. 53 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2025-03-03 13:53:15,078 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:15,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:15,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738436187] [2025-03-03 13:53:15,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:53:15,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966869557] [2025-03-03 13:53:15,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966869557] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:15,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:53:15,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2025-03-03 13:53:15,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178236243] [2025-03-03 13:53:15,852 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:15,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-03 13:53:15,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:15,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-03 13:53:15,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2025-03-03 13:53:15,853 INFO L87 Difference]: Start difference. First operand 530 states and 787 transitions. Second operand has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-03 13:53:17,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:17,280 INFO L93 Difference]: Finished difference Result 726 states and 1093 transitions. [2025-03-03 13:53:17,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 13:53:17,281 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 105 [2025-03-03 13:53:17,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:17,285 INFO L225 Difference]: With dead ends: 726 [2025-03-03 13:53:17,285 INFO L226 Difference]: Without dead ends: 723 [2025-03-03 13:53:17,285 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2025-03-03 13:53:17,286 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 54 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:17,286 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 685 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-03 13:53:17,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2025-03-03 13:53:17,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 698. [2025-03-03 13:53:17,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 342 states have (on average 1.304093567251462) internal successors, (446), 345 states have internal predecessors, (446), 309 states have call successors, (309), 46 states have call predecessors, (309), 46 states have return successors, (308), 306 states have call predecessors, (308), 308 states have call successors, (308) [2025-03-03 13:53:17,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1063 transitions. [2025-03-03 13:53:17,843 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1063 transitions. Word has length 105 [2025-03-03 13:53:17,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:17,844 INFO L471 AbstractCegarLoop]: Abstraction has 698 states and 1063 transitions. [2025-03-03 13:53:17,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-03 13:53:17,844 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1063 transitions. [2025-03-03 13:53:17,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2025-03-03 13:53:17,845 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:17,845 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:17,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-03 13:53:18,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:18,046 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:18,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:18,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1862646870, now seen corresponding path program 2 times [2025-03-03 13:53:18,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:18,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238704272] [2025-03-03 13:53:18,046 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:53:18,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:18,049 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 108 statements into 2 equivalence classes. [2025-03-03 13:53:18,067 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 108 of 108 statements. [2025-03-03 13:53:18,068 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:53:18,068 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:53:18,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905814358] [2025-03-03 13:53:18,071 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:53:18,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:18,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:18,074 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:18,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-03 13:53:18,109 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 108 statements into 2 equivalence classes. [2025-03-03 13:53:18,140 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 108 of 108 statements. [2025-03-03 13:53:18,141 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:53:18,141 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:18,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 81 conjuncts are in the unsatisfiable core [2025-03-03 13:53:18,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 29 proven. 45 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2025-03-03 13:53:18,998 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 26 proven. 36 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2025-03-03 13:53:19,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:19,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238704272] [2025-03-03 13:53:19,968 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:53:19,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905814358] [2025-03-03 13:53:19,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905814358] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:53:19,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:53:19,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 38 [2025-03-03 13:53:19,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209983775] [2025-03-03 13:53:19,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:19,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-03 13:53:19,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:19,969 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-03 13:53:19,969 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1144, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 13:53:19,969 INFO L87 Difference]: Start difference. First operand 698 states and 1063 transitions. Second operand has 38 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 35 states have internal predecessors, (50), 11 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2025-03-03 13:53:29,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:53:39,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:39,796 INFO L93 Difference]: Finished difference Result 1064 states and 1665 transitions. [2025-03-03 13:53:39,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2025-03-03 13:53:39,797 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 35 states have internal predecessors, (50), 11 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) Word has length 108 [2025-03-03 13:53:39,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:39,802 INFO L225 Difference]: With dead ends: 1064 [2025-03-03 13:53:39,802 INFO L226 Difference]: Without dead ends: 1062 [2025-03-03 13:53:39,805 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4204 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=3032, Invalid=10540, Unknown=0, NotChecked=0, Total=13572 [2025-03-03 13:53:39,805 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 305 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 1465 mSolverCounterSat, 385 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 1851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 1465 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:39,805 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 605 Invalid, 1851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 1465 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2025-03-03 13:53:39,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2025-03-03 13:53:40,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 915. [2025-03-03 13:53:40,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 447 states have (on average 1.319910514541387) internal successors, (590), 451 states have internal predecessors, (590), 415 states have call successors, (415), 52 states have call predecessors, (415), 52 states have return successors, (414), 411 states have call predecessors, (414), 414 states have call successors, (414) [2025-03-03 13:53:40,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1419 transitions. [2025-03-03 13:53:40,750 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1419 transitions. Word has length 108 [2025-03-03 13:53:40,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:40,750 INFO L471 AbstractCegarLoop]: Abstraction has 915 states and 1419 transitions. [2025-03-03 13:53:40,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 35 states have internal predecessors, (50), 11 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2025-03-03 13:53:40,750 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1419 transitions. [2025-03-03 13:53:40,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2025-03-03 13:53:40,752 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:40,752 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:40,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-03 13:53:40,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:40,953 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:40,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:40,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1816468747, now seen corresponding path program 7 times [2025-03-03 13:53:40,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:40,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482118511] [2025-03-03 13:53:40,953 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:53:40,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:40,957 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-03-03 13:53:40,961 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-03-03 13:53:40,961 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:53:40,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2025-03-03 13:53:41,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:41,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482118511] [2025-03-03 13:53:41,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482118511] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:41,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119360235] [2025-03-03 13:53:41,041 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:53:41,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:41,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:41,044 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:41,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-03 13:53:41,073 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-03-03 13:53:41,093 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-03-03 13:53:41,094 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:53:41,094 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:41,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 13:53:41,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 236 proven. 15 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2025-03-03 13:53:41,129 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2025-03-03 13:53:41,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119360235] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:53:41,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:53:41,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2025-03-03 13:53:41,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879862959] [2025-03-03 13:53:41,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:41,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-03 13:53:41,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:41,215 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-03 13:53:41,215 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:53:41,216 INFO L87 Difference]: Start difference. First operand 915 states and 1419 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 5 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2025-03-03 13:53:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:42,505 INFO L93 Difference]: Finished difference Result 1623 states and 2561 transitions. [2025-03-03 13:53:42,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 13:53:42,505 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 5 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) Word has length 120 [2025-03-03 13:53:42,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:42,511 INFO L225 Difference]: With dead ends: 1623 [2025-03-03 13:53:42,511 INFO L226 Difference]: Without dead ends: 1103 [2025-03-03 13:53:42,512 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 234 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-03-03 13:53:42,513 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 3 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:42,513 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 207 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:53:42,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2025-03-03 13:53:43,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 1035. [2025-03-03 13:53:43,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 487 states have (on average 1.3285420944558521) internal successors, (647), 505 states have internal predecessors, (647), 495 states have call successors, (495), 52 states have call predecessors, (495), 52 states have return successors, (494), 477 states have call predecessors, (494), 494 states have call successors, (494) [2025-03-03 13:53:43,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 1636 transitions. [2025-03-03 13:53:43,652 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 1636 transitions. Word has length 120 [2025-03-03 13:53:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:43,652 INFO L471 AbstractCegarLoop]: Abstraction has 1035 states and 1636 transitions. [2025-03-03 13:53:43,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 5 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2025-03-03 13:53:43,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 1636 transitions. [2025-03-03 13:53:43,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2025-03-03 13:53:43,655 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:43,655 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:43,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-03 13:53:43,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-03 13:53:43,856 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:43,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:43,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1519848048, now seen corresponding path program 8 times [2025-03-03 13:53:43,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:43,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41013891] [2025-03-03 13:53:43,856 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:53:43,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:43,863 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 123 statements into 2 equivalence classes. [2025-03-03 13:53:43,871 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 123 of 123 statements. [2025-03-03 13:53:43,871 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:53:43,871 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:53:43,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109329907] [2025-03-03 13:53:43,872 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:53:43,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:43,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:43,875 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:43,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-03 13:53:43,905 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 123 statements into 2 equivalence classes. [2025-03-03 13:53:43,941 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 123 of 123 statements. [2025-03-03 13:53:43,941 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:53:43,941 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:43,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 75 conjuncts are in the unsatisfiable core [2025-03-03 13:53:43,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2025-03-03 13:53:44,787 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:45,636 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2025-03-03 13:53:45,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:45,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41013891] [2025-03-03 13:53:45,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:53:45,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109329907] [2025-03-03 13:53:45,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109329907] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:53:45,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:53:45,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2025-03-03 13:53:45,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730665347] [2025-03-03 13:53:45,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:45,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-03 13:53:45,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:45,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-03 13:53:45,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2025-03-03 13:53:45,637 INFO L87 Difference]: Start difference. First operand 1035 states and 1636 transitions. Second operand has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 32 states have internal predecessors, (50), 13 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 10 states have call predecessors, (40), 11 states have call successors, (40) [2025-03-03 13:54:07,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []