./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed 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/array-crafted/zero_sum4.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 ca2dcd06e0389cf665904adfee9ccd6a1a268c87541d3b3b3e0bcffb3a75664e --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 00:32:30,036 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 00:32:30,088 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 00:32:30,093 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 00:32:30,094 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 00:32:30,112 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 00:32:30,113 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 00:32:30,113 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 00:32:30,113 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 00:32:30,114 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 00:32:30,114 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 00:32:30,114 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 00:32:30,115 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 00:32:30,115 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 00:32:30,115 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 00:32:30,115 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 00:32:30,115 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 00:32:30,115 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 00:32:30,115 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 00:32:30,115 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 00:32:30,116 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 00:32:30,116 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 00:32:30,116 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 00:32:30,116 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 00:32:30,116 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 00:32:30,116 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 00:32:30,116 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 00:32:30,116 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 00:32:30,116 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 00:32:30,116 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 00:32:30,117 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 00:32:30,117 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 00:32:30,117 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 00:32:30,117 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 00:32:30,117 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 00:32:30,117 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 00:32:30,117 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 00:32:30,117 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 00:32:30,117 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 00:32:30,118 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 00:32:30,118 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 00:32:30,118 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 00:32:30,118 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 00:32:30,118 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 -> ca2dcd06e0389cf665904adfee9ccd6a1a268c87541d3b3b3e0bcffb3a75664e [2025-03-08 00:32:30,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 00:32:30,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 00:32:30,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 00:32:30,437 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 00:32:30,437 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 00:32:30,438 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum4.c [2025-03-08 00:32:31,574 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d6e93070/4af9ae229ab94cefb5e0ece99fdd6a8c/FLAG920fc9676 [2025-03-08 00:32:31,809 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 00:32:31,810 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum4.c [2025-03-08 00:32:31,819 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d6e93070/4af9ae229ab94cefb5e0ece99fdd6a8c/FLAG920fc9676 [2025-03-08 00:32:31,869 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d6e93070/4af9ae229ab94cefb5e0ece99fdd6a8c [2025-03-08 00:32:31,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 00:32:31,875 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 00:32:31,876 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 00:32:31,876 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 00:32:31,879 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 00:32:31,880 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:32:31" (1/1) ... [2025-03-08 00:32:31,881 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75854446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:31, skipping insertion in model container [2025-03-08 00:32:31,882 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:32:31" (1/1) ... [2025-03-08 00:32:31,896 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 00:32:31,998 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/array-crafted/zero_sum4.c[400,413] [2025-03-08 00:32:32,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 00:32:32,025 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 00:32:32,034 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/array-crafted/zero_sum4.c[400,413] [2025-03-08 00:32:32,046 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 00:32:32,059 INFO L204 MainTranslator]: Completed translation [2025-03-08 00:32:32,060 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:32 WrapperNode [2025-03-08 00:32:32,060 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 00:32:32,061 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 00:32:32,061 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 00:32:32,061 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 00:32:32,065 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:32" (1/1) ... [2025-03-08 00:32:32,072 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:32" (1/1) ... [2025-03-08 00:32:32,088 INFO L138 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2025-03-08 00:32:32,089 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 00:32:32,089 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 00:32:32,090 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 00:32:32,090 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 00:32:32,094 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:32" (1/1) ... [2025-03-08 00:32:32,095 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:32" (1/1) ... [2025-03-08 00:32:32,096 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:32" (1/1) ... [2025-03-08 00:32:32,106 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-08 00:32:32,109 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:32" (1/1) ... [2025-03-08 00:32:32,110 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:32" (1/1) ... [2025-03-08 00:32:32,113 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:32" (1/1) ... [2025-03-08 00:32:32,117 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:32" (1/1) ... [2025-03-08 00:32:32,121 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:32" (1/1) ... [2025-03-08 00:32:32,121 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:32" (1/1) ... [2025-03-08 00:32:32,122 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 00:32:32,124 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 00:32:32,125 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 00:32:32,125 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 00:32:32,125 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:32" (1/1) ... [2025-03-08 00:32:32,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 00:32:32,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:32,153 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) [2025-03-08 00:32:32,156 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 [2025-03-08 00:32:32,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 00:32:32,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 00:32:32,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 00:32:32,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-08 00:32:32,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 00:32:32,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 00:32:32,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 00:32:32,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 00:32:32,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 00:32:32,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 00:32:32,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-08 00:32:32,236 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 00:32:32,237 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 00:32:32,404 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-03-08 00:32:32,404 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 00:32:32,410 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 00:32:32,410 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 00:32:32,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:32:32 BoogieIcfgContainer [2025-03-08 00:32:32,410 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 00:32:32,412 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 00:32:32,412 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 00:32:32,416 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 00:32:32,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 12:32:31" (1/3) ... [2025-03-08 00:32:32,417 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6352fa15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:32:32, skipping insertion in model container [2025-03-08 00:32:32,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:32" (2/3) ... [2025-03-08 00:32:32,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6352fa15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:32:32, skipping insertion in model container [2025-03-08 00:32:32,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:32:32" (3/3) ... [2025-03-08 00:32:32,419 INFO L128 eAbstractionObserver]: Analyzing ICFG zero_sum4.c [2025-03-08 00:32:32,429 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 00:32:32,431 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG zero_sum4.c that has 1 procedures, 20 locations, 1 initial locations, 9 loop locations, and 1 error locations. [2025-03-08 00:32:32,467 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 00:32:32,476 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;@2e395503, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 00:32:32,478 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 00:32:32,481 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:32,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-08 00:32:32,486 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:32,487 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:32,487 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:32,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:32,491 INFO L85 PathProgramCache]: Analyzing trace with hash 205415125, now seen corresponding path program 1 times [2025-03-08 00:32:32,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:32,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574644569] [2025-03-08 00:32:32,496 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:32:32,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:32,548 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 00:32:32,560 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 00:32:32,561 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:32:32,561 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:32:32,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:32,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574644569] [2025-03-08 00:32:32,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574644569] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:32:32,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:32:32,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 00:32:32,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038101504] [2025-03-08 00:32:32,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:32:32,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 00:32:32,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:32,695 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 00:32:32,695 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 00:32:32,696 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:32,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:32,759 INFO L93 Difference]: Finished difference Result 37 states and 56 transitions. [2025-03-08 00:32:32,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 00:32:32,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-03-08 00:32:32,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:32,765 INFO L225 Difference]: With dead ends: 37 [2025-03-08 00:32:32,765 INFO L226 Difference]: Without dead ends: 16 [2025-03-08 00:32:32,767 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 00:32:32,769 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:32,771 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:32:32,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2025-03-08 00:32:32,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2025-03-08 00:32:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:32,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 24 transitions. [2025-03-08 00:32:32,793 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 24 transitions. Word has length 14 [2025-03-08 00:32:32,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:32,794 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 24 transitions. [2025-03-08 00:32:32,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:32,794 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 24 transitions. [2025-03-08 00:32:32,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-08 00:32:32,794 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:32,794 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:32,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 00:32:32,794 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:32,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:32,795 INFO L85 PathProgramCache]: Analyzing trace with hash -80059440, now seen corresponding path program 1 times [2025-03-08 00:32:32,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:32,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442132009] [2025-03-08 00:32:32,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:32:32,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:32,803 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 00:32:32,811 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 00:32:32,814 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:32:32,814 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 00:32:32,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:32,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442132009] [2025-03-08 00:32:32,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442132009] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:32:32,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:32:32,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 00:32:32,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010722212] [2025-03-08 00:32:32,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:32:32,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 00:32:32,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:32,879 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 00:32:32,879 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 00:32:32,880 INFO L87 Difference]: Start difference. First operand 16 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:32,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:32,936 INFO L93 Difference]: Finished difference Result 34 states and 56 transitions. [2025-03-08 00:32:32,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 00:32:32,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-03-08 00:32:32,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:32,937 INFO L225 Difference]: With dead ends: 34 [2025-03-08 00:32:32,937 INFO L226 Difference]: Without dead ends: 24 [2025-03-08 00:32:32,937 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 00:32:32,938 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 26 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:32,938 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 7 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:32:32,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-03-08 00:32:32,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2025-03-08 00:32:32,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:32,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2025-03-08 00:32:32,946 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 15 [2025-03-08 00:32:32,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:32,946 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2025-03-08 00:32:32,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:32,946 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2025-03-08 00:32:32,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-08 00:32:32,946 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:32,947 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:32,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 00:32:32,947 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:32,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:32,947 INFO L85 PathProgramCache]: Analyzing trace with hash 12584656, now seen corresponding path program 1 times [2025-03-08 00:32:32,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:32,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628010667] [2025-03-08 00:32:32,947 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:32:32,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:32,963 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 00:32:32,980 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 00:32:32,980 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:32:32,980 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-08 00:32:33,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:33,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628010667] [2025-03-08 00:32:33,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628010667] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:33,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297644464] [2025-03-08 00:32:33,046 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:32:33,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:33,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:33,050 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) [2025-03-08 00:32:33,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 00:32:33,088 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 00:32:33,108 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 00:32:33,108 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:32:33,108 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:33,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 00:32:33,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-08 00:32:33,166 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-08 00:32:33,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297644464] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:33,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:33,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-08 00:32:33,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696362521] [2025-03-08 00:32:33,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:33,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 00:32:33,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:33,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 00:32:33,201 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-03-08 00:32:33,202 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:33,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:33,261 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2025-03-08 00:32:33,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 00:32:33,261 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-03-08 00:32:33,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:33,261 INFO L225 Difference]: With dead ends: 44 [2025-03-08 00:32:33,261 INFO L226 Difference]: Without dead ends: 25 [2025-03-08 00:32:33,262 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-03-08 00:32:33,262 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:33,262 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:32:33,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-03-08 00:32:33,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-03-08 00:32:33,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:33,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2025-03-08 00:32:33,280 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 23 [2025-03-08 00:32:33,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:33,280 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2025-03-08 00:32:33,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:33,280 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2025-03-08 00:32:33,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-08 00:32:33,281 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:33,281 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:33,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 00:32:33,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:33,485 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:33,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:33,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1320816587, now seen corresponding path program 2 times [2025-03-08 00:32:33,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:33,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767263279] [2025-03-08 00:32:33,486 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:32:33,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:33,496 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-08 00:32:33,510 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 00:32:33,510 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:32:33,510 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 00:32:33,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:33,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767263279] [2025-03-08 00:32:33,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767263279] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:33,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582340222] [2025-03-08 00:32:33,603 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:32:33,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:33,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:33,605 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) [2025-03-08 00:32:33,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 00:32:33,644 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-08 00:32:33,662 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 00:32:33,662 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:32:33,662 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:33,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 00:32:33,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:33,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 00:32:33,711 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:33,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 00:32:33,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582340222] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:33,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:33,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-03-08 00:32:33,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109035886] [2025-03-08 00:32:33,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:33,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 00:32:33,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:33,758 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 00:32:33,758 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-03-08 00:32:33,758 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:33,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:33,840 INFO L93 Difference]: Finished difference Result 50 states and 72 transitions. [2025-03-08 00:32:33,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 00:32:33,841 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2025-03-08 00:32:33,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:33,841 INFO L225 Difference]: With dead ends: 50 [2025-03-08 00:32:33,841 INFO L226 Difference]: Without dead ends: 33 [2025-03-08 00:32:33,841 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-03-08 00:32:33,842 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:33,842 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 11 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:32:33,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-03-08 00:32:33,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2025-03-08 00:32:33,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:33,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2025-03-08 00:32:33,849 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 24 [2025-03-08 00:32:33,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:33,850 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2025-03-08 00:32:33,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:33,850 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2025-03-08 00:32:33,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-08 00:32:33,851 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:33,851 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:33,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 00:32:34,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-08 00:32:34,052 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:34,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:34,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1781985995, now seen corresponding path program 3 times [2025-03-08 00:32:34,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:34,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926518829] [2025-03-08 00:32:34,052 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:32:34,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:34,061 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 32 statements into 2 equivalence classes. [2025-03-08 00:32:34,096 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 00:32:34,097 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 00:32:34,097 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:35,615 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:32:35,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:35,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926518829] [2025-03-08 00:32:35,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926518829] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:35,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867556776] [2025-03-08 00:32:35,618 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:32:35,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:35,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:35,620 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) [2025-03-08 00:32:35,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 00:32:35,658 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 32 statements into 2 equivalence classes. [2025-03-08 00:32:35,679 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 00:32:35,679 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 00:32:35,679 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:35,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 77 conjuncts are in the unsatisfiable core [2025-03-08 00:32:35,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:35,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 00:32:35,926 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:32:35,926 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 00:32:36,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867556776] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:36,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:36,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 20 [2025-03-08 00:32:36,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495703902] [2025-03-08 00:32:36,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:36,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 00:32:36,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:36,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 00:32:36,105 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2025-03-08 00:32:36,106 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:36,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:36,312 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2025-03-08 00:32:36,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 00:32:36,313 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2025-03-08 00:32:36,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:36,313 INFO L225 Difference]: With dead ends: 58 [2025-03-08 00:32:36,313 INFO L226 Difference]: Without dead ends: 55 [2025-03-08 00:32:36,314 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2025-03-08 00:32:36,314 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:36,314 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 80 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:32:36,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-03-08 00:32:36,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2025-03-08 00:32:36,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2025-03-08 00:32:36,327 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 32 [2025-03-08 00:32:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:36,328 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2025-03-08 00:32:36,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:36,328 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2025-03-08 00:32:36,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-08 00:32:36,329 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:36,329 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:36,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 00:32:36,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:36,530 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:36,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:36,530 INFO L85 PathProgramCache]: Analyzing trace with hash 593040752, now seen corresponding path program 4 times [2025-03-08 00:32:36,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:36,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968684497] [2025-03-08 00:32:36,530 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:32:36,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:36,538 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 33 statements into 2 equivalence classes. [2025-03-08 00:32:36,545 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 28 of 33 statements. [2025-03-08 00:32:36,545 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 00:32:36,545 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-08 00:32:36,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:36,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968684497] [2025-03-08 00:32:36,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968684497] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:36,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217560866] [2025-03-08 00:32:36,604 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:32:36,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:36,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:36,606 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) [2025-03-08 00:32:36,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 00:32:36,642 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 33 statements into 2 equivalence classes. [2025-03-08 00:32:36,654 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 28 of 33 statements. [2025-03-08 00:32:36,654 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 00:32:36,654 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:36,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 00:32:36,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-08 00:32:36,712 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:36,758 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-08 00:32:36,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217560866] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:36,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:36,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-03-08 00:32:36,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648139962] [2025-03-08 00:32:36,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:36,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 00:32:36,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:36,760 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 00:32:36,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-03-08 00:32:36,760 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:36,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:36,933 INFO L93 Difference]: Finished difference Result 105 states and 138 transitions. [2025-03-08 00:32:36,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 00:32:36,933 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2025-03-08 00:32:36,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:36,934 INFO L225 Difference]: With dead ends: 105 [2025-03-08 00:32:36,935 INFO L226 Difference]: Without dead ends: 62 [2025-03-08 00:32:36,936 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2025-03-08 00:32:36,936 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:36,937 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:32:36,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-03-08 00:32:36,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2025-03-08 00:32:36,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.263157894736842) internal successors, (72), 57 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:36,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2025-03-08 00:32:36,943 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 33 [2025-03-08 00:32:36,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:36,943 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2025-03-08 00:32:36,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:36,943 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2025-03-08 00:32:36,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-08 00:32:36,944 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:36,944 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:36,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 00:32:37,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:37,144 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:37,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:37,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1179595440, now seen corresponding path program 5 times [2025-03-08 00:32:37,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:37,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140161071] [2025-03-08 00:32:37,145 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:32:37,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:37,155 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 33 statements into 3 equivalence classes. [2025-03-08 00:32:37,166 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 33 of 33 statements. [2025-03-08 00:32:37,166 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 00:32:37,166 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-08 00:32:37,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:37,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140161071] [2025-03-08 00:32:37,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140161071] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:37,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930183725] [2025-03-08 00:32:37,225 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:32:37,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:37,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:37,228 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) [2025-03-08 00:32:37,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 00:32:37,260 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 33 statements into 3 equivalence classes. [2025-03-08 00:32:37,292 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 33 of 33 statements. [2025-03-08 00:32:37,292 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 00:32:37,292 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:37,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 00:32:37,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:37,341 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-08 00:32:37,341 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-08 00:32:37,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930183725] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:37,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:37,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2025-03-08 00:32:37,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560864693] [2025-03-08 00:32:37,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:37,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 00:32:37,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:37,377 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 00:32:37,377 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-03-08 00:32:37,377 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:37,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:37,429 INFO L93 Difference]: Finished difference Result 111 states and 139 transitions. [2025-03-08 00:32:37,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 00:32:37,429 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2025-03-08 00:32:37,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:37,430 INFO L225 Difference]: With dead ends: 111 [2025-03-08 00:32:37,430 INFO L226 Difference]: Without dead ends: 59 [2025-03-08 00:32:37,431 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-03-08 00:32:37,431 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:37,431 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:32:37,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-08 00:32:37,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2025-03-08 00:32:37,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 58 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2025-03-08 00:32:37,439 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 33 [2025-03-08 00:32:37,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:37,439 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2025-03-08 00:32:37,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:37,440 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2025-03-08 00:32:37,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-08 00:32:37,440 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:37,440 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:37,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 00:32:37,641 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 [2025-03-08 00:32:37,641 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:37,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:37,642 INFO L85 PathProgramCache]: Analyzing trace with hash 753007733, now seen corresponding path program 6 times [2025-03-08 00:32:37,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:37,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582299970] [2025-03-08 00:32:37,642 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:32:37,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:37,650 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 34 statements into 3 equivalence classes. [2025-03-08 00:32:37,659 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 34 of 34 statements. [2025-03-08 00:32:37,659 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 00:32:37,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 00:32:37,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:37,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582299970] [2025-03-08 00:32:37,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582299970] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:37,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984104470] [2025-03-08 00:32:37,748 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:32:37,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:37,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:37,750 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) [2025-03-08 00:32:37,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 00:32:37,790 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 34 statements into 3 equivalence classes. [2025-03-08 00:32:37,808 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 34 of 34 statements. [2025-03-08 00:32:37,808 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 00:32:37,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:37,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 00:32:37,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 00:32:37,859 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 00:32:37,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984104470] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:37,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:37,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2025-03-08 00:32:37,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405192403] [2025-03-08 00:32:37,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:37,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 00:32:37,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:37,906 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 00:32:37,906 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2025-03-08 00:32:37,907 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:38,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:38,003 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2025-03-08 00:32:38,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 00:32:38,004 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2025-03-08 00:32:38,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:38,004 INFO L225 Difference]: With dead ends: 63 [2025-03-08 00:32:38,005 INFO L226 Difference]: Without dead ends: 42 [2025-03-08 00:32:38,006 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2025-03-08 00:32:38,006 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:38,006 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 19 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:32:38,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-03-08 00:32:38,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2025-03-08 00:32:38,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:38,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2025-03-08 00:32:38,010 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 34 [2025-03-08 00:32:38,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:38,010 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2025-03-08 00:32:38,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:38,010 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2025-03-08 00:32:38,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-08 00:32:38,011 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:38,011 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:38,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 00:32:38,215 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 [2025-03-08 00:32:38,215 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:38,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:38,215 INFO L85 PathProgramCache]: Analyzing trace with hash 2092591216, now seen corresponding path program 7 times [2025-03-08 00:32:38,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:38,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582779060] [2025-03-08 00:32:38,215 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:32:38,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:38,222 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-08 00:32:38,286 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-08 00:32:38,286 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:32:38,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:32:40,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:40,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582779060] [2025-03-08 00:32:40,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582779060] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:40,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757268049] [2025-03-08 00:32:40,510 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:32:40,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:40,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:40,512 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) [2025-03-08 00:32:40,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 00:32:40,548 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-08 00:32:40,572 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-08 00:32:40,572 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:32:40,572 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:40,574 WARN L254 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 114 conjuncts are in the unsatisfiable core [2025-03-08 00:32:40,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:40,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 00:32:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:32:40,822 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 00:32:41,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757268049] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:41,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:41,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 15, 11] total 44 [2025-03-08 00:32:41,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99460617] [2025-03-08 00:32:41,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:41,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-08 00:32:41,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:41,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-08 00:32:41,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1725, Unknown=0, NotChecked=0, Total=1892 [2025-03-08 00:32:41,103 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:42,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:42,408 INFO L93 Difference]: Finished difference Result 110 states and 138 transitions. [2025-03-08 00:32:42,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-08 00:32:42,409 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2025-03-08 00:32:42,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:42,410 INFO L225 Difference]: With dead ends: 110 [2025-03-08 00:32:42,410 INFO L226 Difference]: Without dead ends: 107 [2025-03-08 00:32:42,412 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=390, Invalid=3516, Unknown=0, NotChecked=0, Total=3906 [2025-03-08 00:32:42,412 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:42,412 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 74 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-08 00:32:42,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2025-03-08 00:32:42,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 91. [2025-03-08 00:32:42,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.2666666666666666) internal successors, (114), 90 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:42,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 114 transitions. [2025-03-08 00:32:42,423 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 114 transitions. Word has length 41 [2025-03-08 00:32:42,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:42,424 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 114 transitions. [2025-03-08 00:32:42,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:42,424 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 114 transitions. [2025-03-08 00:32:42,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-08 00:32:42,424 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:42,424 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:42,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 00:32:42,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:42,629 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:42,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:42,629 INFO L85 PathProgramCache]: Analyzing trace with hash 445850005, now seen corresponding path program 8 times [2025-03-08 00:32:42,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:42,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930264828] [2025-03-08 00:32:42,630 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:32:42,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:42,638 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-03-08 00:32:42,652 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-03-08 00:32:42,652 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:32:42,652 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-03-08 00:32:42,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:42,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930264828] [2025-03-08 00:32:42,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930264828] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:42,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112871632] [2025-03-08 00:32:42,744 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:32:42,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:42,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:42,746 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) [2025-03-08 00:32:42,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 00:32:42,782 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-03-08 00:32:42,803 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-03-08 00:32:42,804 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:32:42,804 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:42,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 00:32:42,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:42,878 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-03-08 00:32:42,879 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-03-08 00:32:42,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112871632] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:42,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:42,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-03-08 00:32:42,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737598950] [2025-03-08 00:32:42,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:42,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 00:32:42,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:42,961 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 00:32:42,961 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2025-03-08 00:32:42,961 INFO L87 Difference]: Start difference. First operand 91 states and 114 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:43,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:43,083 INFO L93 Difference]: Finished difference Result 191 states and 239 transitions. [2025-03-08 00:32:43,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 00:32:43,083 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2025-03-08 00:32:43,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:43,084 INFO L225 Difference]: With dead ends: 191 [2025-03-08 00:32:43,084 INFO L226 Difference]: Without dead ends: 87 [2025-03-08 00:32:43,084 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2025-03-08 00:32:43,085 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:43,085 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:32:43,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-03-08 00:32:43,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2025-03-08 00:32:43,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.255813953488372) internal successors, (108), 86 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:43,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2025-03-08 00:32:43,094 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 42 [2025-03-08 00:32:43,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:43,094 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2025-03-08 00:32:43,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:43,094 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2025-03-08 00:32:43,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-08 00:32:43,095 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:43,095 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:43,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-08 00:32:43,295 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 [2025-03-08 00:32:43,296 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:43,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:43,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2028219408, now seen corresponding path program 9 times [2025-03-08 00:32:43,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:43,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536261981] [2025-03-08 00:32:43,296 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:32:43,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:43,302 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 43 statements into 3 equivalence classes. [2025-03-08 00:32:43,309 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 00:32:43,310 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 00:32:43,310 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:43,393 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-08 00:32:43,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:43,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536261981] [2025-03-08 00:32:43,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536261981] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:43,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748728484] [2025-03-08 00:32:43,393 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:32:43,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:43,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:43,395 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) [2025-03-08 00:32:43,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 00:32:43,432 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 43 statements into 3 equivalence classes. [2025-03-08 00:32:43,455 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 00:32:43,456 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 00:32:43,456 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:43,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 00:32:43,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-08 00:32:43,513 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-08 00:32:43,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748728484] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:43,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:43,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-03-08 00:32:43,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976348508] [2025-03-08 00:32:43,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:43,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 00:32:43,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:43,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 00:32:43,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2025-03-08 00:32:43,572 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:43,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:43,667 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2025-03-08 00:32:43,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 00:32:43,668 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2025-03-08 00:32:43,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:43,668 INFO L225 Difference]: With dead ends: 122 [2025-03-08 00:32:43,668 INFO L226 Difference]: Without dead ends: 51 [2025-03-08 00:32:43,669 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2025-03-08 00:32:43,669 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 35 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:43,669 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 12 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:32:43,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-03-08 00:32:43,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2025-03-08 00:32:43,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:43,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2025-03-08 00:32:43,673 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 43 [2025-03-08 00:32:43,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:43,674 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2025-03-08 00:32:43,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:43,674 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2025-03-08 00:32:43,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-08 00:32:43,674 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:43,674 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:43,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-08 00:32:43,875 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 [2025-03-08 00:32:43,875 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:43,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:43,876 INFO L85 PathProgramCache]: Analyzing trace with hash -987635819, now seen corresponding path program 10 times [2025-03-08 00:32:43,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:43,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374108497] [2025-03-08 00:32:43,876 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:32:43,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:43,881 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 50 statements into 2 equivalence classes. [2025-03-08 00:32:43,903 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-03-08 00:32:43,904 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:32:43,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 00:32:46,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:46,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374108497] [2025-03-08 00:32:46,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374108497] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:46,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314486864] [2025-03-08 00:32:46,608 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:32:46,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:46,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:46,611 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) [2025-03-08 00:32:46,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 00:32:46,646 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 50 statements into 2 equivalence classes. [2025-03-08 00:32:46,671 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-03-08 00:32:46,671 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:32:46,671 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:46,673 WARN L254 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 150 conjuncts are in the unsatisfiable core [2025-03-08 00:32:46,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:46,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 00:32:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:32:47,341 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 00:32:47,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314486864] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:47,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:47,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 18, 13] total 57 [2025-03-08 00:32:47,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353489364] [2025-03-08 00:32:47,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:47,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-03-08 00:32:47,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:47,430 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-03-08 00:32:47,431 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=3011, Unknown=0, NotChecked=0, Total=3192 [2025-03-08 00:32:47,431 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 57 states, 57 states have (on average 2.175438596491228) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:49,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:49,965 INFO L93 Difference]: Finished difference Result 132 states and 166 transitions. [2025-03-08 00:32:49,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-03-08 00:32:49,966 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.175438596491228) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2025-03-08 00:32:49,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:49,967 INFO L225 Difference]: With dead ends: 132 [2025-03-08 00:32:49,967 INFO L226 Difference]: Without dead ends: 129 [2025-03-08 00:32:49,968 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=582, Invalid=7428, Unknown=0, NotChecked=0, Total=8010 [2025-03-08 00:32:49,968 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 39 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 2278 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 2802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 2278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:49,969 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 81 Invalid, 2802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 2278 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-03-08 00:32:49,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2025-03-08 00:32:49,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 53. [2025-03-08 00:32:49,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:49,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2025-03-08 00:32:49,981 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 50 [2025-03-08 00:32:49,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:49,983 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2025-03-08 00:32:49,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.175438596491228) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:49,983 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2025-03-08 00:32:49,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-08 00:32:49,983 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:49,983 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:49,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-08 00:32:50,184 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 [2025-03-08 00:32:50,184 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:50,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:50,184 INFO L85 PathProgramCache]: Analyzing trace with hash -551907568, now seen corresponding path program 11 times [2025-03-08 00:32:50,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:50,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452428443] [2025-03-08 00:32:50,185 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:32:50,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:50,190 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 4 equivalence classes. [2025-03-08 00:32:50,199 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 51 of 51 statements. [2025-03-08 00:32:50,199 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-08 00:32:50,199 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-03-08 00:32:50,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:50,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452428443] [2025-03-08 00:32:50,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452428443] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:50,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425007666] [2025-03-08 00:32:50,296 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:32:50,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:50,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:50,298 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) [2025-03-08 00:32:50,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 00:32:50,341 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 4 equivalence classes. [2025-03-08 00:32:50,434 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 51 of 51 statements. [2025-03-08 00:32:50,434 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-08 00:32:50,434 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:50,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 00:32:50,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:50,517 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-03-08 00:32:50,518 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-03-08 00:32:50,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425007666] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:50,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:50,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2025-03-08 00:32:50,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706396763] [2025-03-08 00:32:50,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:50,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 00:32:50,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:50,586 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 00:32:50,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-03-08 00:32:50,587 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:50,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:50,779 INFO L93 Difference]: Finished difference Result 133 states and 161 transitions. [2025-03-08 00:32:50,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 00:32:50,779 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2025-03-08 00:32:50,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:50,780 INFO L225 Difference]: With dead ends: 133 [2025-03-08 00:32:50,780 INFO L226 Difference]: Without dead ends: 62 [2025-03-08 00:32:50,780 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 92 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2025-03-08 00:32:50,781 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:50,781 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 21 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:32:50,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-03-08 00:32:50,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2025-03-08 00:32:50,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 57 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:50,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2025-03-08 00:32:50,795 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 51 [2025-03-08 00:32:50,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:50,795 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2025-03-08 00:32:50,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:50,795 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2025-03-08 00:32:50,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-08 00:32:50,795 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:50,795 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:50,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-08 00:32:50,996 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 [2025-03-08 00:32:50,996 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:50,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:50,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1002759056, now seen corresponding path program 12 times [2025-03-08 00:32:50,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:50,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951738893] [2025-03-08 00:32:50,996 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:32:50,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:51,004 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 57 statements into 4 equivalence classes. [2025-03-08 00:32:51,014 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 57 of 57 statements. [2025-03-08 00:32:51,015 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-08 00:32:51,015 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-03-08 00:32:51,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:51,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951738893] [2025-03-08 00:32:51,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951738893] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:51,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440577524] [2025-03-08 00:32:51,130 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:32:51,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:51,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:51,132 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) [2025-03-08 00:32:51,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 00:32:51,175 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 57 statements into 4 equivalence classes. [2025-03-08 00:32:51,208 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 57 of 57 statements. [2025-03-08 00:32:51,208 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-08 00:32:51,208 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:51,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 00:32:51,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:51,295 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-03-08 00:32:51,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-03-08 00:32:51,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440577524] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:51,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:51,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2025-03-08 00:32:51,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639440497] [2025-03-08 00:32:51,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:51,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 00:32:51,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:51,358 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 00:32:51,358 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2025-03-08 00:32:51,358 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:51,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:51,414 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2025-03-08 00:32:51,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 00:32:51,414 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2025-03-08 00:32:51,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:51,415 INFO L225 Difference]: With dead ends: 109 [2025-03-08 00:32:51,415 INFO L226 Difference]: Without dead ends: 59 [2025-03-08 00:32:51,415 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2025-03-08 00:32:51,416 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:51,416 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:32:51,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-08 00:32:51,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2025-03-08 00:32:51,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:51,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2025-03-08 00:32:51,429 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 57 [2025-03-08 00:32:51,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:51,429 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2025-03-08 00:32:51,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:51,429 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2025-03-08 00:32:51,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-08 00:32:51,429 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:51,429 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:51,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-08 00:32:51,630 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 [2025-03-08 00:32:51,630 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:51,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:51,630 INFO L85 PathProgramCache]: Analyzing trace with hash -309695339, now seen corresponding path program 13 times [2025-03-08 00:32:51,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:51,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326234772] [2025-03-08 00:32:51,631 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:32:51,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:51,636 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-03-08 00:32:51,641 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-03-08 00:32:51,642 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:32:51,642 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-03-08 00:32:51,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:51,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326234772] [2025-03-08 00:32:51,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326234772] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:51,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921354458] [2025-03-08 00:32:51,746 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:32:51,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:51,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:51,748 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) [2025-03-08 00:32:51,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 00:32:51,791 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-03-08 00:32:51,818 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-03-08 00:32:51,818 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:32:51,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:51,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 00:32:51,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-03-08 00:32:51,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-03-08 00:32:52,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921354458] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:52,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:52,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2025-03-08 00:32:52,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686879163] [2025-03-08 00:32:52,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:52,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 00:32:52,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:52,028 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 00:32:52,028 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2025-03-08 00:32:52,028 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:52,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:52,143 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2025-03-08 00:32:52,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 00:32:52,143 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2025-03-08 00:32:52,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:52,143 INFO L225 Difference]: With dead ends: 63 [2025-03-08 00:32:52,143 INFO L226 Difference]: Without dead ends: 60 [2025-03-08 00:32:52,145 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 99 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2025-03-08 00:32:52,145 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:52,145 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 22 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:32:52,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-03-08 00:32:52,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2025-03-08 00:32:52,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:52,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2025-03-08 00:32:52,163 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 58 [2025-03-08 00:32:52,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:52,163 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2025-03-08 00:32:52,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:52,163 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2025-03-08 00:32:52,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-03-08 00:32:52,163 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:52,163 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:52,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-08 00:32:52,364 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 [2025-03-08 00:32:52,364 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:52,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:52,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1010589168, now seen corresponding path program 14 times [2025-03-08 00:32:52,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:52,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090601659] [2025-03-08 00:32:52,364 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:32:52,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:52,371 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 59 statements into 2 equivalence classes. [2025-03-08 00:32:52,396 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 59 of 59 statements. [2025-03-08 00:32:52,396 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:32:52,396 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:55,746 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:32:55,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:55,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090601659] [2025-03-08 00:32:55,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090601659] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:55,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896455677] [2025-03-08 00:32:55,747 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:32:55,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:55,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:55,748 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) [2025-03-08 00:32:55,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 00:32:55,791 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 59 statements into 2 equivalence classes. [2025-03-08 00:32:55,818 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 59 of 59 statements. [2025-03-08 00:32:55,818 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:32:55,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:55,821 WARN L254 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 179 conjuncts are in the unsatisfiable core [2025-03-08 00:32:55,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:55,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 00:32:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:32:56,131 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:56,636 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 00:32:56,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896455677] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:56,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:56,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 21, 15] total 64 [2025-03-08 00:32:56,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696577404] [2025-03-08 00:32:56,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:56,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2025-03-08 00:32:56,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:56,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2025-03-08 00:32:56,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=3751, Unknown=0, NotChecked=0, Total=4032 [2025-03-08 00:32:56,638 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 64 states, 64 states have (on average 2.359375) internal successors, (151), 64 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:59,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:59,367 INFO L93 Difference]: Finished difference Result 184 states and 227 transitions. [2025-03-08 00:32:59,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2025-03-08 00:32:59,368 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.359375) internal successors, (151), 64 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2025-03-08 00:32:59,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:59,369 INFO L225 Difference]: With dead ends: 184 [2025-03-08 00:32:59,369 INFO L226 Difference]: Without dead ends: 181 [2025-03-08 00:32:59,371 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2400 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1057, Invalid=8645, Unknown=0, NotChecked=0, Total=9702 [2025-03-08 00:32:59,371 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 2804 mSolverCounterSat, 546 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 3350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 546 IncrementalHoareTripleChecker+Valid, 2804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:59,371 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 108 Invalid, 3350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [546 Valid, 2804 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-03-08 00:32:59,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2025-03-08 00:32:59,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 153. [2025-03-08 00:32:59,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.236842105263158) internal successors, (188), 152 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:59,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 188 transitions. [2025-03-08 00:32:59,414 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 188 transitions. Word has length 59 [2025-03-08 00:32:59,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:59,414 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 188 transitions. [2025-03-08 00:32:59,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.359375) internal successors, (151), 64 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:59,414 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 188 transitions. [2025-03-08 00:32:59,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-03-08 00:32:59,415 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:59,415 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:59,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-08 00:32:59,617 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 [2025-03-08 00:32:59,617 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:59,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:59,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1263461387, now seen corresponding path program 15 times [2025-03-08 00:32:59,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:59,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126140336] [2025-03-08 00:32:59,618 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:32:59,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:59,624 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 60 statements into 4 equivalence classes. [2025-03-08 00:32:59,637 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 60 of 60 statements. [2025-03-08 00:32:59,637 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-08 00:32:59,637 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:59,760 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-03-08 00:32:59,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:59,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126140336] [2025-03-08 00:32:59,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126140336] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:59,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483171215] [2025-03-08 00:32:59,761 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:32:59,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:59,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:59,763 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) [2025-03-08 00:32:59,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 00:32:59,808 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 60 statements into 4 equivalence classes. [2025-03-08 00:32:59,847 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 60 of 60 statements. [2025-03-08 00:32:59,848 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-08 00:32:59,848 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:59,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 00:32:59,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-03-08 00:32:59,966 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-03-08 00:33:00,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483171215] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:00,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:00,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-03-08 00:33:00,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384351758] [2025-03-08 00:33:00,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:00,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 00:33:00,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:00,058 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 00:33:00,058 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-03-08 00:33:00,058 INFO L87 Difference]: Start difference. First operand 153 states and 188 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:00,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:00,293 INFO L93 Difference]: Finished difference Result 263 states and 319 transitions. [2025-03-08 00:33:00,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 00:33:00,293 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2025-03-08 00:33:00,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:00,294 INFO L225 Difference]: With dead ends: 263 [2025-03-08 00:33:00,294 INFO L226 Difference]: Without dead ends: 123 [2025-03-08 00:33:00,295 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 101 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2025-03-08 00:33:00,295 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:00,295 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 33 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:33:00,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2025-03-08 00:33:00,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2025-03-08 00:33:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.1610169491525424) internal successors, (137), 118 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 137 transitions. [2025-03-08 00:33:00,332 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 137 transitions. Word has length 60 [2025-03-08 00:33:00,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:00,332 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 137 transitions. [2025-03-08 00:33:00,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:00,333 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 137 transitions. [2025-03-08 00:33:00,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-08 00:33:00,333 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:00,333 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:00,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-08 00:33:00,533 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 [2025-03-08 00:33:00,534 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:00,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:00,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1699763568, now seen corresponding path program 16 times [2025-03-08 00:33:00,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:00,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352626455] [2025-03-08 00:33:00,534 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:33:00,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:00,541 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 61 statements into 2 equivalence classes. [2025-03-08 00:33:00,545 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 53 of 61 statements. [2025-03-08 00:33:00,545 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 00:33:00,545 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2025-03-08 00:33:00,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:00,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352626455] [2025-03-08 00:33:00,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352626455] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:00,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5896688] [2025-03-08 00:33:00,651 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:33:00,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:00,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:00,653 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) [2025-03-08 00:33:00,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 00:33:00,702 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 61 statements into 2 equivalence classes. [2025-03-08 00:33:00,724 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 53 of 61 statements. [2025-03-08 00:33:00,724 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 00:33:00,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:00,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 00:33:00,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2025-03-08 00:33:00,790 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2025-03-08 00:33:00,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5896688] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:00,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:00,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2025-03-08 00:33:00,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767839167] [2025-03-08 00:33:00,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:00,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 00:33:00,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:00,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 00:33:00,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2025-03-08 00:33:00,862 INFO L87 Difference]: Start difference. First operand 119 states and 137 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:01,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:01,044 INFO L93 Difference]: Finished difference Result 123 states and 141 transitions. [2025-03-08 00:33:01,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 00:33:01,045 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2025-03-08 00:33:01,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:01,045 INFO L225 Difference]: With dead ends: 123 [2025-03-08 00:33:01,045 INFO L226 Difference]: Without dead ends: 84 [2025-03-08 00:33:01,046 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 103 SyntacticMatches, 13 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2025-03-08 00:33:01,046 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:01,046 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 29 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:33:01,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-03-08 00:33:01,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2025-03-08 00:33:01,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:01,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2025-03-08 00:33:01,065 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 61 [2025-03-08 00:33:01,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:01,065 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2025-03-08 00:33:01,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:01,065 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2025-03-08 00:33:01,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-03-08 00:33:01,065 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:01,065 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:01,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-08 00:33:01,265 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 [2025-03-08 00:33:01,266 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:01,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:01,266 INFO L85 PathProgramCache]: Analyzing trace with hash 2006299664, now seen corresponding path program 17 times [2025-03-08 00:33:01,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:01,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472624841] [2025-03-08 00:33:01,266 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:33:01,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:01,272 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 67 statements into 4 equivalence classes. [2025-03-08 00:33:01,286 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 67 of 67 statements. [2025-03-08 00:33:01,286 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-08 00:33:01,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2025-03-08 00:33:01,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:01,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472624841] [2025-03-08 00:33:01,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472624841] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:01,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350869833] [2025-03-08 00:33:01,409 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:33:01,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:01,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:01,410 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) [2025-03-08 00:33:01,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 00:33:01,459 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 67 statements into 4 equivalence classes. [2025-03-08 00:33:01,573 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 67 of 67 statements. [2025-03-08 00:33:01,573 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-08 00:33:01,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:01,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 00:33:01,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2025-03-08 00:33:01,680 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2025-03-08 00:33:01,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350869833] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:01,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:01,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2025-03-08 00:33:01,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436832319] [2025-03-08 00:33:01,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:01,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 00:33:01,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:01,768 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 00:33:01,768 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2025-03-08 00:33:01,769 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:01,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:01,842 INFO L93 Difference]: Finished difference Result 128 states and 144 transitions. [2025-03-08 00:33:01,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 00:33:01,843 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2025-03-08 00:33:01,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:01,843 INFO L225 Difference]: With dead ends: 128 [2025-03-08 00:33:01,843 INFO L226 Difference]: Without dead ends: 69 [2025-03-08 00:33:01,844 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 116 SyntacticMatches, 12 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2025-03-08 00:33:01,844 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:01,844 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:33:01,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2025-03-08 00:33:01,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2025-03-08 00:33:01,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:01,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2025-03-08 00:33:01,863 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 67 [2025-03-08 00:33:01,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:01,863 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2025-03-08 00:33:01,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:01,863 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2025-03-08 00:33:01,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-03-08 00:33:01,864 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:01,864 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:01,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-08 00:33:02,068 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 [2025-03-08 00:33:02,068 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:02,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:02,069 INFO L85 PathProgramCache]: Analyzing trace with hash -2029069835, now seen corresponding path program 18 times [2025-03-08 00:33:02,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:02,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923804546] [2025-03-08 00:33:02,069 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:33:02,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:02,074 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 68 statements into 4 equivalence classes. [2025-03-08 00:33:02,136 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 68 of 68 statements. [2025-03-08 00:33:02,136 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-08 00:33:02,136 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:33:07,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:07,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923804546] [2025-03-08 00:33:07,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923804546] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:07,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919991350] [2025-03-08 00:33:07,012 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:33:07,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:07,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:07,014 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) [2025-03-08 00:33:07,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 00:33:07,059 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 68 statements into 4 equivalence classes. [2025-03-08 00:33:07,099 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 68 of 68 statements. [2025-03-08 00:33:07,099 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-08 00:33:07,099 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:07,102 WARN L254 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 215 conjuncts are in the unsatisfiable core [2025-03-08 00:33:07,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:07,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-08 00:33:08,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:33:08,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2025-03-08 00:33:08,398 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 6 proven. 168 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 00:33:08,399 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:09,253 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 00:33:09,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919991350] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:09,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:09,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 20, 19] total 91 [2025-03-08 00:33:09,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586489748] [2025-03-08 00:33:09,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:09,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2025-03-08 00:33:09,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:09,254 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2025-03-08 00:33:09,256 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=7658, Unknown=0, NotChecked=0, Total=8190 [2025-03-08 00:33:09,256 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 91 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:12,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:12,106 INFO L93 Difference]: Finished difference Result 154 states and 195 transitions. [2025-03-08 00:33:12,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-03-08 00:33:12,106 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 91 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2025-03-08 00:33:12,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:12,107 INFO L225 Difference]: With dead ends: 154 [2025-03-08 00:33:12,107 INFO L226 Difference]: Without dead ends: 151 [2025-03-08 00:33:12,109 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 105 SyntacticMatches, 6 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3724 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=903, Invalid=11307, Unknown=0, NotChecked=0, Total=12210 [2025-03-08 00:33:12,110 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 3220 mSolverCounterSat, 704 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 3924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 704 IncrementalHoareTripleChecker+Valid, 3220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:12,110 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 3924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [704 Valid, 3220 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2025-03-08 00:33:12,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2025-03-08 00:33:12,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 144. [2025-03-08 00:33:12,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.2657342657342658) internal successors, (181), 143 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:12,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 181 transitions. [2025-03-08 00:33:12,160 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 181 transitions. Word has length 68 [2025-03-08 00:33:12,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:12,160 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 181 transitions. [2025-03-08 00:33:12,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 91 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:12,160 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 181 transitions. [2025-03-08 00:33:12,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2025-03-08 00:33:12,160 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:12,160 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:12,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-08 00:33:12,361 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 [2025-03-08 00:33:12,361 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:12,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:12,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1707612469, now seen corresponding path program 19 times [2025-03-08 00:33:12,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:12,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368832731] [2025-03-08 00:33:12,362 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:33:12,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:12,368 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 70 statements into 1 equivalence classes. [2025-03-08 00:33:12,374 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 70 of 70 statements. [2025-03-08 00:33:12,374 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:33:12,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2025-03-08 00:33:12,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:12,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368832731] [2025-03-08 00:33:12,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368832731] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:12,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727268062] [2025-03-08 00:33:12,533 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:33:12,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:12,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:12,536 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) [2025-03-08 00:33:12,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 00:33:12,590 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 70 statements into 1 equivalence classes. [2025-03-08 00:33:12,623 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 70 of 70 statements. [2025-03-08 00:33:12,623 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:33:12,623 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:12,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 00:33:12,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2025-03-08 00:33:12,738 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2025-03-08 00:33:12,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727268062] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:12,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:12,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2025-03-08 00:33:12,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141406993] [2025-03-08 00:33:12,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:12,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-08 00:33:12,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:12,848 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-08 00:33:12,849 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2025-03-08 00:33:12,849 INFO L87 Difference]: Start difference. First operand 144 states and 181 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:13,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:13,067 INFO L93 Difference]: Finished difference Result 315 states and 397 transitions. [2025-03-08 00:33:13,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 00:33:13,067 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2025-03-08 00:33:13,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:13,068 INFO L225 Difference]: With dead ends: 315 [2025-03-08 00:33:13,068 INFO L226 Difference]: Without dead ends: 205 [2025-03-08 00:33:13,069 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2025-03-08 00:33:13,069 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 35 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:13,069 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 83 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:33:13,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2025-03-08 00:33:13,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 194. [2025-03-08 00:33:13,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.233160621761658) internal successors, (238), 193 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:13,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 238 transitions. [2025-03-08 00:33:13,141 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 238 transitions. Word has length 70 [2025-03-08 00:33:13,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:13,142 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 238 transitions. [2025-03-08 00:33:13,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:13,142 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 238 transitions. [2025-03-08 00:33:13,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-03-08 00:33:13,142 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:13,142 INFO L218 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:13,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-08 00:33:13,342 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 [2025-03-08 00:33:13,343 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:13,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:13,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1984417611, now seen corresponding path program 20 times [2025-03-08 00:33:13,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:13,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630743673] [2025-03-08 00:33:13,343 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:33:13,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:13,349 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 72 statements into 2 equivalence classes. [2025-03-08 00:33:13,357 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 72 of 72 statements. [2025-03-08 00:33:13,357 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:33:13,357 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 46 proven. 30 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2025-03-08 00:33:13,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:13,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630743673] [2025-03-08 00:33:13,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630743673] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:13,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968809889] [2025-03-08 00:33:13,551 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:33:13,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:13,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:13,553 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) [2025-03-08 00:33:13,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 00:33:13,608 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 72 statements into 2 equivalence classes. [2025-03-08 00:33:13,638 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 72 of 72 statements. [2025-03-08 00:33:13,638 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:33:13,638 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:13,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 00:33:13,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 49 proven. 21 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2025-03-08 00:33:13,765 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 49 proven. 21 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2025-03-08 00:33:13,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968809889] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:13,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:13,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 29 [2025-03-08 00:33:13,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051635748] [2025-03-08 00:33:13,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:13,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-08 00:33:13,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:13,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-08 00:33:13,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2025-03-08 00:33:13,863 INFO L87 Difference]: Start difference. First operand 194 states and 238 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:14,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:14,059 INFO L93 Difference]: Finished difference Result 254 states and 304 transitions. [2025-03-08 00:33:14,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-08 00:33:14,062 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2025-03-08 00:33:14,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:14,063 INFO L225 Difference]: With dead ends: 254 [2025-03-08 00:33:14,063 INFO L226 Difference]: Without dead ends: 78 [2025-03-08 00:33:14,063 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 122 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2025-03-08 00:33:14,064 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:14,064 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:33:14,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-03-08 00:33:14,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2025-03-08 00:33:14,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 77 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:14,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2025-03-08 00:33:14,091 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 72 [2025-03-08 00:33:14,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:14,091 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2025-03-08 00:33:14,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:14,091 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2025-03-08 00:33:14,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2025-03-08 00:33:14,092 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:14,092 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:14,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-08 00:33:14,292 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 [2025-03-08 00:33:14,292 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:14,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:14,293 INFO L85 PathProgramCache]: Analyzing trace with hash -136989776, now seen corresponding path program 21 times [2025-03-08 00:33:14,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:14,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758724876] [2025-03-08 00:33:14,293 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:33:14,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:14,301 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 77 statements into 5 equivalence classes. [2025-03-08 00:33:14,414 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 77 of 77 statements. [2025-03-08 00:33:14,415 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-08 00:33:14,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 1 proven. 251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:33:20,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:20,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758724876] [2025-03-08 00:33:20,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758724876] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:20,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515410066] [2025-03-08 00:33:20,304 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:33:20,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:20,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:20,306 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) [2025-03-08 00:33:20,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-08 00:33:20,357 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 77 statements into 5 equivalence classes. [2025-03-08 00:33:20,449 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 77 of 77 statements. [2025-03-08 00:33:20,450 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-08 00:33:20,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:20,454 WARN L254 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 257 conjuncts are in the unsatisfiable core [2025-03-08 00:33:20,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:20,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-08 00:33:22,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:33:22,821 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:33:22,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2025-03-08 00:33:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 5 proven. 237 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 00:33:22,961 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 00:33:25,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515410066] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:25,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:25,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 43, 44] total 116 [2025-03-08 00:33:25,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048818867] [2025-03-08 00:33:25,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:25,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2025-03-08 00:33:25,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:25,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2025-03-08 00:33:25,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=872, Invalid=12468, Unknown=0, NotChecked=0, Total=13340 [2025-03-08 00:33:25,865 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 116 states, 116 states have (on average 1.8017241379310345) internal successors, (209), 116 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:32,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:32,852 INFO L93 Difference]: Finished difference Result 268 states and 322 transitions. [2025-03-08 00:33:32,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2025-03-08 00:33:32,853 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.8017241379310345) internal successors, (209), 116 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2025-03-08 00:33:32,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:32,854 INFO L225 Difference]: With dead ends: 268 [2025-03-08 00:33:32,854 INFO L226 Difference]: Without dead ends: 265 [2025-03-08 00:33:32,855 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 102 SyntacticMatches, 11 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6526 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=1848, Invalid=24884, Unknown=0, NotChecked=0, Total=26732 [2025-03-08 00:33:32,856 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 5297 mSolverCounterSat, 798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 6095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 798 IncrementalHoareTripleChecker+Valid, 5297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:32,856 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 6095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [798 Valid, 5297 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2025-03-08 00:33:32,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2025-03-08 00:33:32,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 208. [2025-03-08 00:33:32,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.1932367149758454) internal successors, (247), 207 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:32,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 247 transitions. [2025-03-08 00:33:32,948 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 247 transitions. Word has length 77 [2025-03-08 00:33:32,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:32,948 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 247 transitions. [2025-03-08 00:33:32,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.8017241379310345) internal successors, (209), 116 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:32,949 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 247 transitions. [2025-03-08 00:33:32,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2025-03-08 00:33:32,949 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:32,949 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:32,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-08 00:33:33,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-03-08 00:33:33,150 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:33,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:33,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1974925515, now seen corresponding path program 22 times [2025-03-08 00:33:33,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:33,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071638117] [2025-03-08 00:33:33,150 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:33:33,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:33,157 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 78 statements into 2 equivalence classes. [2025-03-08 00:33:33,163 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 68 of 78 statements. [2025-03-08 00:33:33,163 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 00:33:33,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2025-03-08 00:33:33,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:33,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071638117] [2025-03-08 00:33:33,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071638117] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:33,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898890928] [2025-03-08 00:33:33,315 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:33:33,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:33,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:33,317 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:33:33,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-08 00:33:33,369 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 78 statements into 2 equivalence classes. [2025-03-08 00:33:33,393 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 68 of 78 statements. [2025-03-08 00:33:33,393 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 00:33:33,393 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:33,394 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 00:33:33,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2025-03-08 00:33:33,480 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2025-03-08 00:33:33,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898890928] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:33,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:33,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 27 [2025-03-08 00:33:33,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419218940] [2025-03-08 00:33:33,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:33,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-08 00:33:33,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:33,579 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-08 00:33:33,579 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2025-03-08 00:33:33,580 INFO L87 Difference]: Start difference. First operand 208 states and 247 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:34,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:34,018 INFO L93 Difference]: Finished difference Result 364 states and 434 transitions. [2025-03-08 00:33:34,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-08 00:33:34,018 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2025-03-08 00:33:34,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:34,020 INFO L225 Difference]: With dead ends: 364 [2025-03-08 00:33:34,020 INFO L226 Difference]: Without dead ends: 233 [2025-03-08 00:33:34,020 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 131 SyntacticMatches, 17 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=323, Invalid=937, Unknown=0, NotChecked=0, Total=1260 [2025-03-08 00:33:34,020 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:34,020 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 25 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 00:33:34,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2025-03-08 00:33:34,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 141. [2025-03-08 00:33:34,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1142857142857143) internal successors, (156), 140 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:34,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 156 transitions. [2025-03-08 00:33:34,093 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 156 transitions. Word has length 78 [2025-03-08 00:33:34,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:34,093 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 156 transitions. [2025-03-08 00:33:34,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:34,094 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 156 transitions. [2025-03-08 00:33:34,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-03-08 00:33:34,094 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:34,094 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:34,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-08 00:33:34,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:34,294 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:34,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:34,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1333507120, now seen corresponding path program 23 times [2025-03-08 00:33:34,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:34,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890554600] [2025-03-08 00:33:34,295 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:33:34,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:34,302 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 79 statements into 5 equivalence classes. [2025-03-08 00:33:34,323 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 79 of 79 statements. [2025-03-08 00:33:34,323 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 00:33:34,323 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2025-03-08 00:33:34,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:34,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890554600] [2025-03-08 00:33:34,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890554600] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:34,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886346807] [2025-03-08 00:33:34,515 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:33:34,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:34,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:34,517 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:33:34,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-08 00:33:34,571 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 79 statements into 5 equivalence classes. [2025-03-08 00:33:34,948 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 79 of 79 statements. [2025-03-08 00:33:34,948 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 00:33:34,948 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:34,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 00:33:34,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2025-03-08 00:33:35,085 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2025-03-08 00:33:35,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886346807] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:35,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:35,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 27 [2025-03-08 00:33:35,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291019294] [2025-03-08 00:33:35,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:35,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-08 00:33:35,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:35,181 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-08 00:33:35,181 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2025-03-08 00:33:35,181 INFO L87 Difference]: Start difference. First operand 141 states and 156 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:35,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:35,528 INFO L93 Difference]: Finished difference Result 200 states and 221 transitions. [2025-03-08 00:33:35,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 00:33:35,528 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2025-03-08 00:33:35,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:35,529 INFO L225 Difference]: With dead ends: 200 [2025-03-08 00:33:35,529 INFO L226 Difference]: Without dead ends: 86 [2025-03-08 00:33:35,530 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 142 SyntacticMatches, 16 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=879, Unknown=0, NotChecked=0, Total=1190 [2025-03-08 00:33:35,530 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:35,530 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 24 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:33:35,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2025-03-08 00:33:35,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2025-03-08 00:33:35,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 85 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:35,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2025-03-08 00:33:35,577 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 79 [2025-03-08 00:33:35,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:35,577 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2025-03-08 00:33:35,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:35,578 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2025-03-08 00:33:35,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2025-03-08 00:33:35,578 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:35,578 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:35,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-08 00:33:35,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:35,782 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:35,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:35,782 INFO L85 PathProgramCache]: Analyzing trace with hash 101885360, now seen corresponding path program 24 times [2025-03-08 00:33:35,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:35,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682144229] [2025-03-08 00:33:35,782 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:33:35,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:35,789 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 85 statements into 5 equivalence classes. [2025-03-08 00:33:35,822 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 85 of 85 statements. [2025-03-08 00:33:35,822 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-08 00:33:35,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2025-03-08 00:33:36,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:36,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682144229] [2025-03-08 00:33:36,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682144229] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:36,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070210808] [2025-03-08 00:33:36,021 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:33:36,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:36,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:36,022 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:33:36,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-08 00:33:36,078 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 85 statements into 5 equivalence classes. [2025-03-08 00:33:36,125 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 85 of 85 statements. [2025-03-08 00:33:36,126 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-08 00:33:36,126 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:36,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 00:33:36,129 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2025-03-08 00:33:36,273 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2025-03-08 00:33:36,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070210808] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:36,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:36,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2025-03-08 00:33:36,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938150581] [2025-03-08 00:33:36,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:36,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-08 00:33:36,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:36,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-08 00:33:36,392 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2025-03-08 00:33:36,392 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:36,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:36,519 INFO L93 Difference]: Finished difference Result 162 states and 178 transitions. [2025-03-08 00:33:36,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 00:33:36,520 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2025-03-08 00:33:36,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:36,521 INFO L225 Difference]: With dead ends: 162 [2025-03-08 00:33:36,521 INFO L226 Difference]: Without dead ends: 87 [2025-03-08 00:33:36,521 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 145 SyntacticMatches, 15 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2025-03-08 00:33:36,521 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:36,521 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:33:36,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-03-08 00:33:36,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2025-03-08 00:33:36,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1046511627906976) internal successors, (95), 86 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:36,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2025-03-08 00:33:36,583 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 85 [2025-03-08 00:33:36,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:36,583 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2025-03-08 00:33:36,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:36,583 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2025-03-08 00:33:36,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2025-03-08 00:33:36,583 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:36,583 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:36,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-08 00:33:36,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-08 00:33:36,784 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:36,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:36,784 INFO L85 PathProgramCache]: Analyzing trace with hash 584449109, now seen corresponding path program 25 times [2025-03-08 00:33:36,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:36,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296212106] [2025-03-08 00:33:36,784 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:33:36,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:36,793 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 86 statements into 1 equivalence classes. [2025-03-08 00:33:36,916 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 86 of 86 statements. [2025-03-08 00:33:36,916 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:33:36,916 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 25 proven. 299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:33:44,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:44,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296212106] [2025-03-08 00:33:44,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296212106] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:44,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354012816] [2025-03-08 00:33:44,961 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:33:44,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:44,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:44,963 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:33:44,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-08 00:33:45,021 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 86 statements into 1 equivalence classes. [2025-03-08 00:33:45,065 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 86 of 86 statements. [2025-03-08 00:33:45,065 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:33:45,065 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:45,069 WARN L254 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 284 conjuncts are in the unsatisfiable core [2025-03-08 00:33:45,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:45,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 00:33:45,471 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:33:45,472 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-08 00:33:46,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354012816] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:46,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:46,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 30, 21] total 88 [2025-03-08 00:33:46,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126369924] [2025-03-08 00:33:46,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:46,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2025-03-08 00:33:46,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:46,500 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2025-03-08 00:33:46,500 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=7167, Unknown=0, NotChecked=0, Total=7656 [2025-03-08 00:33:46,501 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 88 states, 88 states have (on average 2.375) internal successors, (209), 88 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:50,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:50,253 INFO L93 Difference]: Finished difference Result 228 states and 259 transitions. [2025-03-08 00:33:50,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2025-03-08 00:33:50,254 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.375) internal successors, (209), 88 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2025-03-08 00:33:50,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:50,255 INFO L225 Difference]: With dead ends: 228 [2025-03-08 00:33:50,255 INFO L226 Difference]: Without dead ends: 225 [2025-03-08 00:33:50,256 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4675 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1302, Invalid=15468, Unknown=0, NotChecked=0, Total=16770 [2025-03-08 00:33:50,256 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 4143 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 4530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 4143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:50,257 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 115 Invalid, 4530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 4143 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2025-03-08 00:33:50,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2025-03-08 00:33:50,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 153. [2025-03-08 00:33:50,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.118421052631579) internal successors, (170), 152 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:50,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 170 transitions. [2025-03-08 00:33:50,344 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 170 transitions. Word has length 86 [2025-03-08 00:33:50,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:50,344 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 170 transitions. [2025-03-08 00:33:50,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.375) internal successors, (209), 88 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:50,344 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 170 transitions. [2025-03-08 00:33:50,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2025-03-08 00:33:50,345 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:50,345 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:50,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-08 00:33:50,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-08 00:33:50,545 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:50,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:50,545 INFO L85 PathProgramCache]: Analyzing trace with hash 938084944, now seen corresponding path program 26 times [2025-03-08 00:33:50,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:50,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50862902] [2025-03-08 00:33:50,546 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:33:50,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:50,553 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 87 statements into 2 equivalence classes. [2025-03-08 00:33:50,563 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 87 of 87 statements. [2025-03-08 00:33:50,563 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:33:50,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2025-03-08 00:33:50,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:50,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50862902] [2025-03-08 00:33:50,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50862902] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:50,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064093601] [2025-03-08 00:33:50,774 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:33:50,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:50,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:50,776 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:33:50,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-08 00:33:50,841 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 87 statements into 2 equivalence classes. [2025-03-08 00:33:50,876 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 87 of 87 statements. [2025-03-08 00:33:50,877 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:33:50,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:50,878 INFO L256 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-08 00:33:50,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2025-03-08 00:33:51,044 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2025-03-08 00:33:51,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064093601] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:51,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:51,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2025-03-08 00:33:51,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444432714] [2025-03-08 00:33:51,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:51,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-08 00:33:51,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:51,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-08 00:33:51,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2025-03-08 00:33:51,187 INFO L87 Difference]: Start difference. First operand 153 states and 170 transitions. Second operand has 32 states, 32 states have (on average 1.625) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:51,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:51,576 INFO L93 Difference]: Finished difference Result 321 states and 356 transitions. [2025-03-08 00:33:51,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 00:33:51,576 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2025-03-08 00:33:51,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:51,577 INFO L225 Difference]: With dead ends: 321 [2025-03-08 00:33:51,577 INFO L226 Difference]: Without dead ends: 144 [2025-03-08 00:33:51,578 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 146 SyntacticMatches, 17 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2025-03-08 00:33:51,578 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:51,578 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:33:51,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2025-03-08 00:33:51,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2025-03-08 00:33:51,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.1118881118881119) internal successors, (159), 143 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 159 transitions. [2025-03-08 00:33:51,658 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 159 transitions. Word has length 87 [2025-03-08 00:33:51,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:51,659 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 159 transitions. [2025-03-08 00:33:51,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:51,659 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 159 transitions. [2025-03-08 00:33:51,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2025-03-08 00:33:51,659 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:51,659 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:51,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-08 00:33:51,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-08 00:33:51,860 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:51,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:51,860 INFO L85 PathProgramCache]: Analyzing trace with hash 825379765, now seen corresponding path program 27 times [2025-03-08 00:33:51,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:51,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111909915] [2025-03-08 00:33:51,860 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:33:51,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:51,868 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 88 statements into 6 equivalence classes. [2025-03-08 00:33:51,907 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 88 of 88 statements. [2025-03-08 00:33:51,907 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-08 00:33:51,907 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2025-03-08 00:33:52,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:52,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111909915] [2025-03-08 00:33:52,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111909915] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:52,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838987492] [2025-03-08 00:33:52,097 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:33:52,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:52,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:52,098 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:33:52,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-08 00:33:52,163 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 88 statements into 6 equivalence classes. [2025-03-08 00:33:52,249 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 88 of 88 statements. [2025-03-08 00:33:52,249 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-08 00:33:52,249 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:52,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-08 00:33:52,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2025-03-08 00:33:52,403 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2025-03-08 00:33:52,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838987492] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:52,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:52,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2025-03-08 00:33:52,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084269564] [2025-03-08 00:33:52,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:52,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-08 00:33:52,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:52,516 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-08 00:33:52,516 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2025-03-08 00:33:52,516 INFO L87 Difference]: Start difference. First operand 144 states and 159 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:52,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:52,954 INFO L93 Difference]: Finished difference Result 312 states and 350 transitions. [2025-03-08 00:33:52,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 00:33:52,954 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2025-03-08 00:33:52,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:52,955 INFO L225 Difference]: With dead ends: 312 [2025-03-08 00:33:52,955 INFO L226 Difference]: Without dead ends: 153 [2025-03-08 00:33:52,955 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 156 SyntacticMatches, 17 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2025-03-08 00:33:52,956 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:52,956 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 27 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 00:33:52,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2025-03-08 00:33:53,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2025-03-08 00:33:53,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.1013513513513513) internal successors, (163), 148 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:53,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 163 transitions. [2025-03-08 00:33:53,045 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 163 transitions. Word has length 88 [2025-03-08 00:33:53,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:53,045 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 163 transitions. [2025-03-08 00:33:53,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:53,045 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 163 transitions. [2025-03-08 00:33:53,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2025-03-08 00:33:53,046 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:53,046 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:53,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-03-08 00:33:53,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-08 00:33:53,246 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:53,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:53,246 INFO L85 PathProgramCache]: Analyzing trace with hash 570450837, now seen corresponding path program 28 times [2025-03-08 00:33:53,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:53,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955464882] [2025-03-08 00:33:53,247 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:33:53,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:53,254 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 88 statements into 2 equivalence classes. [2025-03-08 00:33:53,260 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 76 of 88 statements. [2025-03-08 00:33:53,261 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 00:33:53,261 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2025-03-08 00:33:53,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:53,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955464882] [2025-03-08 00:33:53,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955464882] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:53,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72440944] [2025-03-08 00:33:53,424 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:33:53,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:53,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:53,426 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:33:53,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-08 00:33:53,488 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 88 statements into 2 equivalence classes. [2025-03-08 00:33:53,514 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 76 of 88 statements. [2025-03-08 00:33:53,514 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 00:33:53,514 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:53,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-08 00:33:53,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2025-03-08 00:33:53,608 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2025-03-08 00:33:53,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72440944] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:53,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:53,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 30 [2025-03-08 00:33:53,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777250840] [2025-03-08 00:33:53,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:53,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-08 00:33:53,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:53,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-08 00:33:53,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2025-03-08 00:33:53,712 INFO L87 Difference]: Start difference. First operand 149 states and 163 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:54,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:54,033 INFO L93 Difference]: Finished difference Result 153 states and 167 transitions. [2025-03-08 00:33:54,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-08 00:33:54,033 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2025-03-08 00:33:54,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:54,034 INFO L225 Difference]: With dead ends: 153 [2025-03-08 00:33:54,034 INFO L226 Difference]: Without dead ends: 96 [2025-03-08 00:33:54,034 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 148 SyntacticMatches, 19 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=394, Invalid=1166, Unknown=0, NotChecked=0, Total=1560 [2025-03-08 00:33:54,035 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:54,035 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 19 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:33:54,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-03-08 00:33:54,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2025-03-08 00:33:54,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0947368421052632) internal successors, (104), 95 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:54,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2025-03-08 00:33:54,088 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 88 [2025-03-08 00:33:54,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:54,088 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2025-03-08 00:33:54,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:54,088 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2025-03-08 00:33:54,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2025-03-08 00:33:54,089 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:54,089 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:54,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-03-08 00:33:54,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:54,289 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:54,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:54,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1335190192, now seen corresponding path program 29 times [2025-03-08 00:33:54,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:54,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388963735] [2025-03-08 00:33:54,290 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:33:54,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:54,297 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 95 statements into 6 equivalence classes. [2025-03-08 00:33:54,437 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 95 of 95 statements. [2025-03-08 00:33:54,437 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-08 00:33:54,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat