./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 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_sum_const3.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 4a8466707e2bff30c44c48996d40a42275ef25007ed8ba21de1de20ade9b7ba9 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 13:42:39,963 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 13:42:40,017 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 13:42:40,022 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 13:42:40,024 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 13:42:40,039 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 13:42:40,040 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 13:42:40,040 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 13:42:40,041 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 13:42:40,041 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 13:42:40,041 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 13:42:40,042 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 13:42:40,042 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 13:42:40,042 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 13:42:40,042 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 13:42:40,042 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 13:42:40,042 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 13:42:40,042 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 13:42:40,042 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 13:42:40,042 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 13:42:40,042 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 13:42:40,042 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 13:42:40,042 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 13:42:40,043 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 13:42:40,043 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 13:42:40,043 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 13:42:40,043 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 13:42:40,043 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 13:42:40,043 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 13:42:40,043 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 13:42:40,043 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 13:42:40,043 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 13:42:40,043 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:42:40,043 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 13:42:40,043 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 13:42:40,043 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 13:42:40,043 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 13:42:40,043 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 13:42:40,043 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 13:42:40,043 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 13:42:40,043 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 13:42:40,043 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 13:42:40,043 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 13:42:40,043 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 -> 4a8466707e2bff30c44c48996d40a42275ef25007ed8ba21de1de20ade9b7ba9 [2025-03-16 13:42:40,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 13:42:40,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 13:42:40,294 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 13:42:40,295 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 13:42:40,296 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 13:42:40,297 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const3.c [2025-03-16 13:42:41,453 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b59439a3/47629b02b0794b1f831da1d0a882cb60/FLAGbf8a96d20 [2025-03-16 13:42:41,663 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 13:42:41,664 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const3.c [2025-03-16 13:42:41,674 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b59439a3/47629b02b0794b1f831da1d0a882cb60/FLAGbf8a96d20 [2025-03-16 13:42:42,019 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b59439a3/47629b02b0794b1f831da1d0a882cb60 [2025-03-16 13:42:42,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 13:42:42,021 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 13:42:42,022 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 13:42:42,022 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 13:42:42,025 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 13:42:42,026 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:42:42" (1/1) ... [2025-03-16 13:42:42,026 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17c5f70e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:42:42, skipping insertion in model container [2025-03-16 13:42:42,026 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:42:42" (1/1) ... [2025-03-16 13:42:42,035 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 13:42:42,127 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_sum_const3.c[406,419] [2025-03-16 13:42:42,145 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:42:42,151 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 13:42:42,160 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_sum_const3.c[406,419] [2025-03-16 13:42:42,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:42:42,179 INFO L204 MainTranslator]: Completed translation [2025-03-16 13:42:42,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:42:42 WrapperNode [2025-03-16 13:42:42,179 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 13:42:42,180 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 13:42:42,180 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 13:42:42,180 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 13:42:42,184 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:42:42" (1/1) ... [2025-03-16 13:42:42,188 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:42:42" (1/1) ... [2025-03-16 13:42:42,198 INFO L138 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2025-03-16 13:42:42,199 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 13:42:42,199 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 13:42:42,199 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 13:42:42,199 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 13:42:42,204 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:42:42" (1/1) ... [2025-03-16 13:42:42,205 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:42:42" (1/1) ... [2025-03-16 13:42:42,206 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:42:42" (1/1) ... [2025-03-16 13:42:42,213 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 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]. [2025-03-16 13:42:42,213 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:42:42" (1/1) ... [2025-03-16 13:42:42,213 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:42:42" (1/1) ... [2025-03-16 13:42:42,220 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:42:42" (1/1) ... [2025-03-16 13:42:42,221 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:42:42" (1/1) ... [2025-03-16 13:42:42,221 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:42:42" (1/1) ... [2025-03-16 13:42:42,222 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:42:42" (1/1) ... [2025-03-16 13:42:42,226 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 13:42:42,227 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 13:42:42,227 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 13:42:42,228 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 13:42:42,229 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:42:42" (1/1) ... [2025-03-16 13:42:42,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:42:42,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:42:42,255 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) [2025-03-16 13:42:42,257 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 [2025-03-16 13:42:42,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 13:42:42,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 13:42:42,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 13:42:42,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 13:42:42,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 13:42:42,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-16 13:42:42,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 13:42:42,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 13:42:42,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 13:42:42,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 13:42:42,318 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 13:42:42,320 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 13:42:42,473 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-03-16 13:42:42,473 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 13:42:42,482 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 13:42:42,482 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 13:42:42,482 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:42:42 BoogieIcfgContainer [2025-03-16 13:42:42,482 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 13:42:42,484 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 13:42:42,484 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 13:42:42,487 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 13:42:42,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 01:42:42" (1/3) ... [2025-03-16 13:42:42,488 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6adc20ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:42:42, skipping insertion in model container [2025-03-16 13:42:42,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:42:42" (2/3) ... [2025-03-16 13:42:42,490 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6adc20ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:42:42, skipping insertion in model container [2025-03-16 13:42:42,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:42:42" (3/3) ... [2025-03-16 13:42:42,490 INFO L128 eAbstractionObserver]: Analyzing ICFG zero_sum_const3.c [2025-03-16 13:42:42,501 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 13:42:42,503 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG zero_sum_const3.c that has 1 procedures, 16 locations, 1 initial locations, 7 loop locations, and 1 error locations. [2025-03-16 13:42:42,538 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 13:42:42,545 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;@5ee969f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 13:42:42,545 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 13:42:42,548 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) 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) [2025-03-16 13:42:42,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-16 13:42:42,551 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:42:42,552 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:42:42,552 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:42:42,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:42:42,555 INFO L85 PathProgramCache]: Analyzing trace with hash -845513108, now seen corresponding path program 1 times [2025-03-16 13:42:42,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:42:42,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007550422] [2025-03-16 13:42:42,560 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:42:42,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:42:42,614 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-16 13:42:42,627 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-16 13:42:42,628 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:42:42,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:42:42,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:42:42,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:42:42,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007550422] [2025-03-16 13:42:42,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007550422] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:42:42,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:42:42,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 13:42:42,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961966594] [2025-03-16 13:42:42,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:42:42,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 13:42:42,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:42:42,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 13:42:42,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:42:42,771 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) 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) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2025-03-16 13:42:42,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:42:42,807 INFO L93 Difference]: Finished difference Result 30 states and 45 transitions. [2025-03-16 13:42:42,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 13:42:42,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2025-03-16 13:42:42,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:42:42,813 INFO L225 Difference]: With dead ends: 30 [2025-03-16 13:42:42,813 INFO L226 Difference]: Without dead ends: 13 [2025-03-16 13:42:42,816 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 [2025-03-16 13:42:42,819 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:42:42,821 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:42:42,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2025-03-16 13:42:42,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2025-03-16 13:42:42,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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) [2025-03-16 13:42:42,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2025-03-16 13:42:42,839 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 19 transitions. Word has length 11 [2025-03-16 13:42:42,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:42:42,839 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 19 transitions. [2025-03-16 13:42:42,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2025-03-16 13:42:42,844 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 19 transitions. [2025-03-16 13:42:42,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-16 13:42:42,844 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:42:42,844 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:42:42,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 13:42:42,844 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:42:42,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:42:42,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1067269911, now seen corresponding path program 1 times [2025-03-16 13:42:42,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:42:42,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694746843] [2025-03-16 13:42:42,845 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:42:42,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:42:42,852 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-16 13:42:42,858 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-16 13:42:42,858 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:42:42,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:42:42,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:42:42,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:42:42,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694746843] [2025-03-16 13:42:42,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694746843] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:42:42,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:42:42,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 13:42:42,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197221064] [2025-03-16 13:42:42,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:42:42,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 13:42:42,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:42:42,922 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 13:42:42,922 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-16 13:42:42,922 INFO L87 Difference]: Start difference. First operand 13 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2025-03-16 13:42:42,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:42:42,962 INFO L93 Difference]: Finished difference Result 27 states and 43 transitions. [2025-03-16 13:42:42,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 13:42:42,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2025-03-16 13:42:42,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:42:42,962 INFO L225 Difference]: With dead ends: 27 [2025-03-16 13:42:42,962 INFO L226 Difference]: Without dead ends: 19 [2025-03-16 13:42:42,963 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 [2025-03-16 13:42:42,964 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:42:42,964 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 6 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:42:42,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-03-16 13:42:42,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2025-03-16 13:42:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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) [2025-03-16 13:42:42,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2025-03-16 13:42:42,970 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 12 [2025-03-16 13:42:42,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:42:42,970 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2025-03-16 13:42:42,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2025-03-16 13:42:42,970 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2025-03-16 13:42:42,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-16 13:42:42,970 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:42:42,970 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:42:42,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 13:42:42,971 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:42:42,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:42:42,971 INFO L85 PathProgramCache]: Analyzing trace with hash -2131088553, now seen corresponding path program 1 times [2025-03-16 13:42:42,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:42:42,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776647786] [2025-03-16 13:42:42,971 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:42:42,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:42:42,984 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-16 13:42:43,001 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 13:42:43,002 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:42:43,002 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:42:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 13:42:43,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:42:43,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776647786] [2025-03-16 13:42:43,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776647786] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:42:43,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143711093] [2025-03-16 13:42:43,073 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:42:43,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:42:43,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:42:43,075 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) [2025-03-16 13:42:43,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 13:42:43,126 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-16 13:42:43,141 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 13:42:43,141 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:42:43,141 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:42:43,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 13:42:43,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:42:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 13:42:43,196 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:42:43,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 13:42:43,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143711093] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:42:43,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:42:43,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-16 13:42:43,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455397304] [2025-03-16 13:42:43,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:42:43,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 13:42:43,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:42:43,226 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 13:42:43,226 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-03-16 13:42:43,226 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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) [2025-03-16 13:42:43,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:42:43,270 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2025-03-16 13:42:43,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 13:42:43,270 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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 18 [2025-03-16 13:42:43,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:42:43,270 INFO L225 Difference]: With dead ends: 35 [2025-03-16 13:42:43,270 INFO L226 Difference]: Without dead ends: 20 [2025-03-16 13:42:43,271 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-03-16 13:42:43,271 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:42:43,271 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:42:43,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-16 13:42:43,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-03-16 13:42:43,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 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) [2025-03-16 13:42:43,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2025-03-16 13:42:43,276 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 18 [2025-03-16 13:42:43,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:42:43,276 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2025-03-16 13:42:43,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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) [2025-03-16 13:42:43,276 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2025-03-16 13:42:43,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-16 13:42:43,279 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:42:43,279 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:42:43,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-16 13:42:43,481 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 [2025-03-16 13:42:43,481 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:42:43,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:42:43,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1841849420, now seen corresponding path program 2 times [2025-03-16 13:42:43,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:42:43,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997041807] [2025-03-16 13:42:43,482 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:42:43,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:42:43,491 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-16 13:42:43,508 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 13:42:43,508 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:42:43,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:42:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-16 13:42:43,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:42:43,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997041807] [2025-03-16 13:42:43,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997041807] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:42:43,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249335355] [2025-03-16 13:42:43,603 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:42:43,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:42:43,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:42:43,604 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) [2025-03-16 13:42:43,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 13:42:43,636 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-16 13:42:43,654 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 13:42:43,655 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:42:43,655 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:42:43,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 13:42:43,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:42:43,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-16 13:42:43,693 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:42:43,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-16 13:42:43,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249335355] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:42:43,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:42:43,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-03-16 13:42:43,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092681612] [2025-03-16 13:42:43,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:42:43,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 13:42:43,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:42:43,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 13:42:43,715 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-03-16 13:42:43,715 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) [2025-03-16 13:42:43,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:42:43,775 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2025-03-16 13:42:43,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 13:42:43,775 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 19 [2025-03-16 13:42:43,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:42:43,776 INFO L225 Difference]: With dead ends: 39 [2025-03-16 13:42:43,776 INFO L226 Difference]: Without dead ends: 26 [2025-03-16 13:42:43,776 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-03-16 13:42:43,777 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:42:43,777 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 8 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:42:43,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-16 13:42:43,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2025-03-16 13:42:43,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 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) [2025-03-16 13:42:43,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2025-03-16 13:42:43,782 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 19 [2025-03-16 13:42:43,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:42:43,782 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2025-03-16 13:42:43,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) [2025-03-16 13:42:43,782 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2025-03-16 13:42:43,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-16 13:42:43,783 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:42:43,783 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:42:43,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-16 13:42:43,983 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 [2025-03-16 13:42:43,983 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:42:43,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:42:43,984 INFO L85 PathProgramCache]: Analyzing trace with hash -820064244, now seen corresponding path program 3 times [2025-03-16 13:42:43,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:42:43,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493241163] [2025-03-16 13:42:43,984 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:42:43,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:42:43,992 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 2 equivalence classes. [2025-03-16 13:42:44,004 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-16 13:42:44,005 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-16 13:42:44,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:42:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:42:45,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:42:45,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493241163] [2025-03-16 13:42:45,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493241163] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:42:45,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209914347] [2025-03-16 13:42:45,213 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:42:45,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:42:45,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:42:45,216 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) [2025-03-16 13:42:45,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 13:42:45,248 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 2 equivalence classes. [2025-03-16 13:42:45,268 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-16 13:42:45,268 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-16 13:42:45,268 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:42:45,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-03-16 13:42:45,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:42:45,313 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 [2025-03-16 13:42:45,495 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:42:45,495 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:42:45,648 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:42:45,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209914347] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:42:45,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:42:45,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 24 [2025-03-16 13:42:45,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610548210] [2025-03-16 13:42:45,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:42:45,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-16 13:42:45,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:42:45,650 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-16 13:42:45,651 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2025-03-16 13:42:45,651 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 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) [2025-03-16 13:42:45,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:42:45,879 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2025-03-16 13:42:45,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 13:42:45,880 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 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 25 [2025-03-16 13:42:45,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:42:45,880 INFO L225 Difference]: With dead ends: 45 [2025-03-16 13:42:45,880 INFO L226 Difference]: Without dead ends: 42 [2025-03-16 13:42:45,881 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2025-03-16 13:42:45,881 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:42:45,881 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:42:45,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-03-16 13:42:45,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2025-03-16 13:42:45,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 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) [2025-03-16 13:42:45,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2025-03-16 13:42:45,888 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 25 [2025-03-16 13:42:45,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:42:45,888 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2025-03-16 13:42:45,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 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) [2025-03-16 13:42:45,889 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2025-03-16 13:42:45,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-16 13:42:45,890 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:42:45,890 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:42:45,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-16 13:42:46,094 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 [2025-03-16 13:42:46,094 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:42:46,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:42:46,094 INFO L85 PathProgramCache]: Analyzing trace with hash 347843959, now seen corresponding path program 4 times [2025-03-16 13:42:46,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:42:46,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048671794] [2025-03-16 13:42:46,095 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:42:46,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:42:46,105 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-16 13:42:46,113 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 24 of 26 statements. [2025-03-16 13:42:46,113 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:42:46,113 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:42:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 13:42:46,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:42:46,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048671794] [2025-03-16 13:42:46,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048671794] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:42:46,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746503536] [2025-03-16 13:42:46,183 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:42:46,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:42:46,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:42:46,185 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) [2025-03-16 13:42:46,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 13:42:46,218 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-16 13:42:46,231 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 24 of 26 statements. [2025-03-16 13:42:46,231 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:42:46,231 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:42:46,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 13:42:46,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:42:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 13:42:46,286 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:42:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 13:42:46,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746503536] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:42:46,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:42:46,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-03-16 13:42:46,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930390953] [2025-03-16 13:42:46,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:42:46,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 13:42:46,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:42:46,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 13:42:46,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-03-16 13:42:46,332 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 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) [2025-03-16 13:42:46,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:42:46,475 INFO L93 Difference]: Finished difference Result 85 states and 111 transitions. [2025-03-16 13:42:46,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 13:42:46,476 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 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 26 [2025-03-16 13:42:46,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:42:46,476 INFO L225 Difference]: With dead ends: 85 [2025-03-16 13:42:46,476 INFO L226 Difference]: Without dead ends: 48 [2025-03-16 13:42:46,477 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2025-03-16 13:42:46,477 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:42:46,477 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:42:46,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-03-16 13:42:46,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2025-03-16 13:42:46,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 states have internal predecessors, (54), 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) [2025-03-16 13:42:46,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2025-03-16 13:42:46,491 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 26 [2025-03-16 13:42:46,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:42:46,491 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2025-03-16 13:42:46,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 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) [2025-03-16 13:42:46,491 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2025-03-16 13:42:46,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-16 13:42:46,492 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:42:46,492 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:42:46,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 13:42:46,697 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 [2025-03-16 13:42:46,697 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:42:46,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:42:46,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1269346996, now seen corresponding path program 5 times [2025-03-16 13:42:46,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:42:46,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357490068] [2025-03-16 13:42:46,698 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:42:46,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:42:46,706 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-03-16 13:42:46,715 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 13:42:46,716 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-16 13:42:46,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:42:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 13:42:46,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:42:46,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357490068] [2025-03-16 13:42:46,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357490068] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:42:46,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983810575] [2025-03-16 13:42:46,796 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:42:46,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:42:46,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:42:46,798 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) [2025-03-16 13:42:46,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 13:42:46,830 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-03-16 13:42:46,857 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 13:42:46,858 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-16 13:42:46,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:42:46,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 13:42:46,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:42:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 13:42:46,916 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:42:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 13:42:46,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983810575] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:42:46,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:42:46,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-03-16 13:42:46,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115564331] [2025-03-16 13:42:46,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:42:46,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 13:42:46,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:42:46,975 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 13:42:46,975 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-03-16 13:42:46,976 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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) [2025-03-16 13:42:47,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:42:47,103 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2025-03-16 13:42:47,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 13:42:47,103 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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) Word has length 27 [2025-03-16 13:42:47,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:42:47,104 INFO L225 Difference]: With dead ends: 48 [2025-03-16 13:42:47,104 INFO L226 Difference]: Without dead ends: 33 [2025-03-16 13:42:47,104 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2025-03-16 13:42:47,105 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:42:47,105 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 14 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:42:47,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-03-16 13:42:47,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2025-03-16 13:42:47,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 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) [2025-03-16 13:42:47,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2025-03-16 13:42:47,111 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 27 [2025-03-16 13:42:47,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:42:47,111 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2025-03-16 13:42:47,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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) [2025-03-16 13:42:47,111 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2025-03-16 13:42:47,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-16 13:42:47,111 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:42:47,112 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:42:47,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-16 13:42:47,313 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 [2025-03-16 13:42:47,313 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:42:47,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:42:47,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1887935049, now seen corresponding path program 6 times [2025-03-16 13:42:47,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:42:47,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071787194] [2025-03-16 13:42:47,314 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:42:47,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:42:47,321 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 32 statements into 3 equivalence classes. [2025-03-16 13:42:47,379 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 32 of 32 statements. [2025-03-16 13:42:47,379 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-16 13:42:47,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:42:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:42:49,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:42:49,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071787194] [2025-03-16 13:42:49,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071787194] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:42:49,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363231488] [2025-03-16 13:42:49,255 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:42:49,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:42:49,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:42:49,257 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) [2025-03-16 13:42:49,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 13:42:49,285 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 32 statements into 3 equivalence classes. [2025-03-16 13:42:49,303 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 32 of 32 statements. [2025-03-16 13:42:49,304 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-16 13:42:49,304 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:42:49,305 WARN L254 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 90 conjuncts are in the unsatisfiable core [2025-03-16 13:42:49,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:42:49,341 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 [2025-03-16 13:42:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:42:49,651 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:42:49,897 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 13:42:49,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363231488] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:42:49,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:42:49,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 14, 11] total 46 [2025-03-16 13:42:49,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627006396] [2025-03-16 13:42:49,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:42:49,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-03-16 13:42:49,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:42:49,898 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-03-16 13:42:49,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1862, Unknown=0, NotChecked=0, Total=2070 [2025-03-16 13:42:49,899 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 46 states, 46 states have (on average 1.891304347826087) internal successors, (87), 46 states have internal predecessors, (87), 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) [2025-03-16 13:42:50,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:42:50,591 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2025-03-16 13:42:50,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-16 13:42:50,592 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.891304347826087) internal successors, (87), 46 states have internal predecessors, (87), 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 [2025-03-16 13:42:50,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:42:50,592 INFO L225 Difference]: With dead ends: 75 [2025-03-16 13:42:50,592 INFO L226 Difference]: Without dead ends: 34 [2025-03-16 13:42:50,593 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=313, Invalid=2767, Unknown=0, NotChecked=0, Total=3080 [2025-03-16 13:42:50,593 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 13:42:50,594 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 58 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 13:42:50,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-03-16 13:42:50,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2025-03-16 13:42:50,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 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) [2025-03-16 13:42:50,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2025-03-16 13:42:50,601 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 32 [2025-03-16 13:42:50,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:42:50,601 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2025-03-16 13:42:50,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.891304347826087) internal successors, (87), 46 states have internal predecessors, (87), 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) [2025-03-16 13:42:50,601 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2025-03-16 13:42:50,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-16 13:42:50,602 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:42:50,602 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:42:50,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-16 13:42:50,806 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 [2025-03-16 13:42:50,806 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:42:50,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:42:50,806 INFO L85 PathProgramCache]: Analyzing trace with hash -807455284, now seen corresponding path program 7 times [2025-03-16 13:42:50,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:42:50,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031110834] [2025-03-16 13:42:50,806 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:42:50,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:42:50,812 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-16 13:42:50,816 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 13:42:50,816 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:42:50,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:42:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-16 13:42:50,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:42:50,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031110834] [2025-03-16 13:42:50,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031110834] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:42:50,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277696751] [2025-03-16 13:42:50,883 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:42:50,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:42:50,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:42:50,885 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) [2025-03-16 13:42:50,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 13:42:50,915 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-16 13:42:50,930 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 13:42:50,931 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:42:50,931 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:42:50,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 13:42:50,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:42:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-16 13:42:50,979 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:42:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-16 13:42:51,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277696751] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:42:51,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:42:51,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2025-03-16 13:42:51,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830912713] [2025-03-16 13:42:51,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:42:51,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 13:42:51,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:42:51,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 13:42:51,017 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2025-03-16 13:42:51,017 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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) [2025-03-16 13:42:51,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:42:51,137 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2025-03-16 13:42:51,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 13:42:51,138 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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) Word has length 33 [2025-03-16 13:42:51,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:42:51,138 INFO L225 Difference]: With dead ends: 84 [2025-03-16 13:42:51,138 INFO L226 Difference]: Without dead ends: 56 [2025-03-16 13:42:51,139 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2025-03-16 13:42:51,139 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:42:51,139 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:42:51,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-03-16 13:42:51,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2025-03-16 13:42:51,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 54 states have internal predecessors, (65), 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) [2025-03-16 13:42:51,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2025-03-16 13:42:51,145 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 33 [2025-03-16 13:42:51,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:42:51,145 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2025-03-16 13:42:51,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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) [2025-03-16 13:42:51,145 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2025-03-16 13:42:51,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-16 13:42:51,145 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:42:51,145 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:42:51,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-16 13:42:51,346 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 [2025-03-16 13:42:51,346 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:42:51,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:42:51,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1233955785, now seen corresponding path program 8 times [2025-03-16 13:42:51,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:42:51,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644251458] [2025-03-16 13:42:51,346 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:42:51,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:42:51,352 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-03-16 13:42:51,356 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 13:42:51,356 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:42:51,356 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:42:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-03-16 13:42:51,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:42:51,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644251458] [2025-03-16 13:42:51,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644251458] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:42:51,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067278254] [2025-03-16 13:42:51,433 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:42:51,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:42:51,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:42:51,435 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) [2025-03-16 13:42:51,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 13:42:51,468 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-03-16 13:42:51,485 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 13:42:51,485 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:42:51,486 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:42:51,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 13:42:51,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:42:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-03-16 13:42:51,557 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:42:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-03-16 13:42:51,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067278254] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:42:51,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:42:51,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-03-16 13:42:51,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896707351] [2025-03-16 13:42:51,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:42:51,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-16 13:42:51,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:42:51,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-16 13:42:51,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-03-16 13:42:51,615 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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) [2025-03-16 13:42:51,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:42:51,774 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2025-03-16 13:42:51,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 13:42:51,775 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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) Word has length 34 [2025-03-16 13:42:51,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:42:51,775 INFO L225 Difference]: With dead ends: 59 [2025-03-16 13:42:51,775 INFO L226 Difference]: Without dead ends: 40 [2025-03-16 13:42:51,776 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2025-03-16 13:42:51,776 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:42:51,776 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:42:51,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-03-16 13:42:51,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2025-03-16 13:42:51,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 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) [2025-03-16 13:42:51,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2025-03-16 13:42:51,783 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 34 [2025-03-16 13:42:51,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:42:51,783 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2025-03-16 13:42:51,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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) [2025-03-16 13:42:51,784 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2025-03-16 13:42:51,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-16 13:42:51,784 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:42:51,784 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:42:51,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-16 13:42:51,985 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 [2025-03-16 13:42:51,985 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:42:51,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:42:51,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1679570516, now seen corresponding path program 9 times [2025-03-16 13:42:51,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:42:51,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497627985] [2025-03-16 13:42:51,985 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:42:51,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:42:51,991 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 3 equivalence classes. [2025-03-16 13:42:52,004 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 39 of 39 statements. [2025-03-16 13:42:52,004 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:42:52,004 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:42:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 13:42:54,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:42:54,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497627985] [2025-03-16 13:42:54,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497627985] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:42:54,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096779133] [2025-03-16 13:42:54,017 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:42:54,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:42:54,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:42:54,019 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) [2025-03-16 13:42:54,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 13:42:54,059 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 3 equivalence classes. [2025-03-16 13:42:54,084 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 39 of 39 statements. [2025-03-16 13:42:54,084 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:42:54,084 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:42:54,086 WARN L254 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 122 conjuncts are in the unsatisfiable core [2025-03-16 13:42:54,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:42:54,218 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 [2025-03-16 13:42:55,475 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:42:55,475 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:42:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:42:56,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096779133] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:42:56,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:42:56,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 26, 27] total 79 [2025-03-16 13:42:56,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022188610] [2025-03-16 13:42:56,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:42:56,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2025-03-16 13:42:56,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:42:56,650 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2025-03-16 13:42:56,651 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=5559, Unknown=0, NotChecked=0, Total=6162 [2025-03-16 13:42:56,652 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 79 states, 79 states have (on average 1.379746835443038) internal successors, (109), 79 states have internal predecessors, (109), 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) [2025-03-16 13:43:05,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:43:05,531 INFO L93 Difference]: Finished difference Result 201 states and 246 transitions. [2025-03-16 13:43:05,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2025-03-16 13:43:05,532 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.379746835443038) internal successors, (109), 79 states have internal predecessors, (109), 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 39 [2025-03-16 13:43:05,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:43:05,533 INFO L225 Difference]: With dead ends: 201 [2025-03-16 13:43:05,533 INFO L226 Difference]: Without dead ends: 112 [2025-03-16 13:43:05,537 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5517 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1979, Invalid=17203, Unknown=0, NotChecked=0, Total=19182 [2025-03-16 13:43:05,537 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 26 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2741 mSolverCounterSat, 730 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 3474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 730 IncrementalHoareTripleChecker+Valid, 2741 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2025-03-16 13:43:05,537 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 76 Invalid, 3474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [730 Valid, 2741 Invalid, 3 Unknown, 0 Unchecked, 4.6s Time] [2025-03-16 13:43:05,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-03-16 13:43:05,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 74. [2025-03-16 13:43:05,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 73 states have internal predecessors, (88), 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) [2025-03-16 13:43:05,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2025-03-16 13:43:05,554 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 39 [2025-03-16 13:43:05,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:43:05,555 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2025-03-16 13:43:05,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.379746835443038) internal successors, (109), 79 states have internal predecessors, (109), 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) [2025-03-16 13:43:05,555 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2025-03-16 13:43:05,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-16 13:43:05,556 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:43:05,556 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:43:05,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-16 13:43:05,757 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 [2025-03-16 13:43:05,758 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:43:05,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:43:05,758 INFO L85 PathProgramCache]: Analyzing trace with hash -102642932, now seen corresponding path program 10 times [2025-03-16 13:43:05,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:43:05,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310644518] [2025-03-16 13:43:05,758 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:43:05,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:43:05,764 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 41 statements into 2 equivalence classes. [2025-03-16 13:43:05,768 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 39 of 41 statements. [2025-03-16 13:43:05,768 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:43:05,769 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:43:05,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:43:05,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310644518] [2025-03-16 13:43:05,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310644518] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:43:05,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971430873] [2025-03-16 13:43:05,858 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:43:05,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:05,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:43:05,860 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) [2025-03-16 13:43:05,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 13:43:05,894 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 41 statements into 2 equivalence classes. [2025-03-16 13:43:05,912 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 39 of 41 statements. [2025-03-16 13:43:05,912 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:43:05,912 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:05,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 13:43:05,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:43:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:43:05,999 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:43:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:43:06,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971430873] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:43:06,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:43:06,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2025-03-16 13:43:06,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720312601] [2025-03-16 13:43:06,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:43:06,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-16 13:43:06,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:43:06,068 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-16 13:43:06,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-03-16 13:43:06,068 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 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) [2025-03-16 13:43:06,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:43:06,251 INFO L93 Difference]: Finished difference Result 161 states and 196 transitions. [2025-03-16 13:43:06,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 13:43:06,251 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 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 [2025-03-16 13:43:06,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:43:06,252 INFO L225 Difference]: With dead ends: 161 [2025-03-16 13:43:06,252 INFO L226 Difference]: Without dead ends: 89 [2025-03-16 13:43:06,252 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2025-03-16 13:43:06,253 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:43:06,253 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:43:06,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-03-16 13:43:06,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2025-03-16 13:43:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.175) internal successors, (94), 80 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) [2025-03-16 13:43:06,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2025-03-16 13:43:06,268 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 41 [2025-03-16 13:43:06,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:43:06,268 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2025-03-16 13:43:06,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 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) [2025-03-16 13:43:06,268 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2025-03-16 13:43:06,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-16 13:43:06,269 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:43:06,269 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:43:06,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-16 13:43:06,470 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 [2025-03-16 13:43:06,470 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:43:06,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:43:06,470 INFO L85 PathProgramCache]: Analyzing trace with hash -69532596, now seen corresponding path program 11 times [2025-03-16 13:43:06,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:43:06,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483949785] [2025-03-16 13:43:06,470 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:43:06,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:43:06,475 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 43 statements into 4 equivalence classes. [2025-03-16 13:43:06,484 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 13:43:06,484 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-16 13:43:06,485 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-03-16 13:43:06,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:43:06,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483949785] [2025-03-16 13:43:06,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483949785] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:43:06,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091017070] [2025-03-16 13:43:06,590 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:43:06,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:06,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:43:06,592 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) [2025-03-16 13:43:06,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 13:43:06,630 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 43 statements into 4 equivalence classes. [2025-03-16 13:43:06,724 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 13:43:06,724 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-16 13:43:06,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:06,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 13:43:06,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:43:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2025-03-16 13:43:06,800 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:43:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2025-03-16 13:43:06,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091017070] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:43:06,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:43:06,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2025-03-16 13:43:06,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799589457] [2025-03-16 13:43:06,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:43:06,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-16 13:43:06,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:43:06,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-16 13:43:06,877 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2025-03-16 13:43:06,877 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 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) [2025-03-16 13:43:07,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:43:07,233 INFO L93 Difference]: Finished difference Result 173 states and 209 transitions. [2025-03-16 13:43:07,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-16 13:43:07,233 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 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 [2025-03-16 13:43:07,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:43:07,234 INFO L225 Difference]: With dead ends: 173 [2025-03-16 13:43:07,234 INFO L226 Difference]: Without dead ends: 106 [2025-03-16 13:43:07,235 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 82 SyntacticMatches, 10 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=296, Invalid=964, Unknown=0, NotChecked=0, Total=1260 [2025-03-16 13:43:07,235 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 44 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:43:07,235 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 36 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:43:07,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2025-03-16 13:43:07,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2025-03-16 13:43:07,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1566265060240963) internal successors, (96), 83 states have internal predecessors, (96), 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) [2025-03-16 13:43:07,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 96 transitions. [2025-03-16 13:43:07,258 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 96 transitions. Word has length 43 [2025-03-16 13:43:07,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:43:07,258 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 96 transitions. [2025-03-16 13:43:07,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 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) [2025-03-16 13:43:07,258 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 96 transitions. [2025-03-16 13:43:07,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 13:43:07,258 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:43:07,258 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:43:07,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-16 13:43:07,459 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 [2025-03-16 13:43:07,459 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:43:07,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:43:07,460 INFO L85 PathProgramCache]: Analyzing trace with hash -937887721, now seen corresponding path program 12 times [2025-03-16 13:43:07,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:43:07,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951930223] [2025-03-16 13:43:07,460 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:43:07,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:43:07,466 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 46 statements into 4 equivalence classes. [2025-03-16 13:43:07,525 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 13:43:07,526 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-16 13:43:07,526 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:43:09,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:43:09,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951930223] [2025-03-16 13:43:09,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951930223] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:43:09,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19539580] [2025-03-16 13:43:09,988 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:43:09,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:09,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:43:09,990 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) [2025-03-16 13:43:09,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-16 13:43:10,024 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 46 statements into 4 equivalence classes. [2025-03-16 13:43:10,048 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 13:43:10,048 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-16 13:43:10,048 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:10,051 WARN L254 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 140 conjuncts are in the unsatisfiable core [2025-03-16 13:43:10,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:43:12,254 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-16 13:43:12,255 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-16 13:43:12,269 INFO L349 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2025-03-16 13:43:12,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 25 [2025-03-16 13:43:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 5 proven. 90 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 13:43:12,381 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:43:40,546 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:43:40,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 69 treesize of output 153 [2025-03-16 13:43:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 94 refuted. 1 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 13:43:41,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19539580] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:43:41,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:43:41,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 39] total 106 [2025-03-16 13:43:41,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839109674] [2025-03-16 13:43:41,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:43:41,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2025-03-16 13:43:41,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:43:41,225 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2025-03-16 13:43:41,226 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=10049, Unknown=24, NotChecked=0, Total=11130 [2025-03-16 13:43:41,227 INFO L87 Difference]: Start difference. First operand 84 states and 96 transitions. Second operand has 106 states, 106 states have (on average 1.1603773584905661) internal successors, (123), 106 states have internal predecessors, (123), 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) [2025-03-16 13:43:45,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:43:45,984 INFO L93 Difference]: Finished difference Result 123 states and 140 transitions. [2025-03-16 13:43:45,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-03-16 13:43:45,984 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.1603773584905661) internal successors, (123), 106 states have internal predecessors, (123), 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 46 [2025-03-16 13:43:45,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:43:45,985 INFO L225 Difference]: With dead ends: 123 [2025-03-16 13:43:45,985 INFO L226 Difference]: Without dead ends: 60 [2025-03-16 13:43:45,988 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5568 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=2127, Invalid=16209, Unknown=24, NotChecked=0, Total=18360 [2025-03-16 13:43:45,988 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 48 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 3118 mSolverCounterSat, 984 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 4102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 984 IncrementalHoareTripleChecker+Valid, 3118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:43:45,988 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 82 Invalid, 4102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [984 Valid, 3118 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2025-03-16 13:43:45,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-03-16 13:43:46,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2025-03-16 13:43:46,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 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) [2025-03-16 13:43:46,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2025-03-16 13:43:46,002 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 46 [2025-03-16 13:43:46,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:43:46,002 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2025-03-16 13:43:46,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.1603773584905661) internal successors, (123), 106 states have internal predecessors, (123), 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) [2025-03-16 13:43:46,002 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2025-03-16 13:43:46,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-16 13:43:46,003 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:43:46,003 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:43:46,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-16 13:43:46,203 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 [2025-03-16 13:43:46,203 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:43:46,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:43:46,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1408479127, now seen corresponding path program 13 times [2025-03-16 13:43:46,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:43:46,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437573559] [2025-03-16 13:43:46,204 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:43:46,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:43:46,209 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-16 13:43:46,215 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-16 13:43:46,215 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:43:46,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-03-16 13:43:46,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:43:46,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437573559] [2025-03-16 13:43:46,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437573559] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:43:46,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883254648] [2025-03-16 13:43:46,328 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:43:46,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:46,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:43:46,330 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) [2025-03-16 13:43:46,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-16 13:43:46,372 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-16 13:43:46,397 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-16 13:43:46,397 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:43:46,397 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:46,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 13:43:46,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:43:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-03-16 13:43:46,489 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:43:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-03-16 13:43:46,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883254648] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:43:46,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:43:46,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2025-03-16 13:43:46,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736562843] [2025-03-16 13:43:46,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:43:46,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-16 13:43:46,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:43:46,542 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-16 13:43:46,542 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2025-03-16 13:43:46,542 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 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) [2025-03-16 13:43:46,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:43:46,640 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2025-03-16 13:43:46,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 13:43:46,641 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 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 52 [2025-03-16 13:43:46,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:43:46,641 INFO L225 Difference]: With dead ends: 99 [2025-03-16 13:43:46,641 INFO L226 Difference]: Without dead ends: 54 [2025-03-16 13:43:46,642 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 86 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2025-03-16 13:43:46,642 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:43:46,642 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:43:46,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-03-16 13:43:46,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2025-03-16 13:43:46,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 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) [2025-03-16 13:43:46,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2025-03-16 13:43:46,662 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 52 [2025-03-16 13:43:46,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:43:46,662 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2025-03-16 13:43:46,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 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) [2025-03-16 13:43:46,662 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2025-03-16 13:43:46,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-16 13:43:46,662 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:43:46,662 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:43:46,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-16 13:43:46,862 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 [2025-03-16 13:43:46,863 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:43:46,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:43:46,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1688431436, now seen corresponding path program 14 times [2025-03-16 13:43:46,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:43:46,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027023992] [2025-03-16 13:43:46,863 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:43:46,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:43:46,868 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 53 statements into 2 equivalence classes. [2025-03-16 13:43:46,900 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 13:43:46,900 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:43:46,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:43:50,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:43:50,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027023992] [2025-03-16 13:43:50,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027023992] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:43:50,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968548857] [2025-03-16 13:43:50,116 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:43:50,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:50,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:43:50,118 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) [2025-03-16 13:43:50,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-16 13:43:50,154 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 53 statements into 2 equivalence classes. [2025-03-16 13:43:50,181 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 13:43:50,181 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:43:50,181 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:50,183 WARN L254 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 168 conjuncts are in the unsatisfiable core [2025-03-16 13:43:50,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:43:50,204 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 [2025-03-16 13:43:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:43:50,881 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:43:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 13:43:51,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968548857] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:43:51,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:43:51,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 23, 17] total 76 [2025-03-16 13:43:51,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727902628] [2025-03-16 13:43:51,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:43:51,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2025-03-16 13:43:51,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:43:51,696 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2025-03-16 13:43:51,697 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=5359, Unknown=0, NotChecked=0, Total=5700 [2025-03-16 13:43:51,697 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 76 states, 76 states have (on average 1.868421052631579) internal successors, (142), 76 states have internal predecessors, (142), 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) [2025-03-16 13:43:54,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:43:54,277 INFO L93 Difference]: Finished difference Result 167 states and 197 transitions. [2025-03-16 13:43:54,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-03-16 13:43:54,278 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.868421052631579) internal successors, (142), 76 states have internal predecessors, (142), 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 53 [2025-03-16 13:43:54,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:43:54,278 INFO L225 Difference]: With dead ends: 167 [2025-03-16 13:43:54,278 INFO L226 Difference]: Without dead ends: 128 [2025-03-16 13:43:54,279 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2548 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=820, Invalid=9892, Unknown=0, NotChecked=0, Total=10712 [2025-03-16 13:43:54,279 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 2285 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 2285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:43:54,279 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 103 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 2285 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-03-16 13:43:54,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-03-16 13:43:54,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 103. [2025-03-16 13:43:54,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.2156862745098038) internal successors, (124), 102 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) [2025-03-16 13:43:54,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2025-03-16 13:43:54,309 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 53 [2025-03-16 13:43:54,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:43:54,309 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2025-03-16 13:43:54,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.868421052631579) internal successors, (142), 76 states have internal predecessors, (142), 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) [2025-03-16 13:43:54,309 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2025-03-16 13:43:54,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-03-16 13:43:54,310 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:43:54,310 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:43:54,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-16 13:43:54,510 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 [2025-03-16 13:43:54,510 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:43:54,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:43:54,511 INFO L85 PathProgramCache]: Analyzing trace with hash 801798711, now seen corresponding path program 15 times [2025-03-16 13:43:54,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:43:54,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943625680] [2025-03-16 13:43:54,511 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:43:54,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:43:54,517 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 54 statements into 5 equivalence classes. [2025-03-16 13:43:54,540 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 54 of 54 statements. [2025-03-16 13:43:54,540 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-16 13:43:54,540 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-03-16 13:43:54,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:43:54,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943625680] [2025-03-16 13:43:54,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943625680] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:43:54,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085792694] [2025-03-16 13:43:54,687 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:43:54,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:54,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:43:54,689 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) [2025-03-16 13:43:54,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-16 13:43:54,729 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 54 statements into 5 equivalence classes. [2025-03-16 13:43:54,776 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 54 of 54 statements. [2025-03-16 13:43:54,777 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-16 13:43:54,777 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:54,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-16 13:43:54,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:43:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-03-16 13:43:54,918 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:43:55,030 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-03-16 13:43:55,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085792694] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:43:55,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:43:55,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2025-03-16 13:43:55,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825290465] [2025-03-16 13:43:55,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:43:55,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-16 13:43:55,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:43:55,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-16 13:43:55,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2025-03-16 13:43:55,031 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 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) [2025-03-16 13:43:55,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:43:55,266 INFO L93 Difference]: Finished difference Result 214 states and 253 transitions. [2025-03-16 13:43:55,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-16 13:43:55,266 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 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 54 [2025-03-16 13:43:55,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:43:55,267 INFO L225 Difference]: With dead ends: 214 [2025-03-16 13:43:55,267 INFO L226 Difference]: Without dead ends: 92 [2025-03-16 13:43:55,267 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 13 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2025-03-16 13:43:55,268 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:43:55,268 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 16 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:43:55,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-03-16 13:43:55,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2025-03-16 13:43:55,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 87 states have internal predecessors, (98), 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) [2025-03-16 13:43:55,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2025-03-16 13:43:55,292 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 54 [2025-03-16 13:43:55,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:43:55,292 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2025-03-16 13:43:55,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 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) [2025-03-16 13:43:55,292 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2025-03-16 13:43:55,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-16 13:43:55,292 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:43:55,292 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:43:55,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-16 13:43:55,493 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 [2025-03-16 13:43:55,493 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:43:55,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:43:55,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1182631796, now seen corresponding path program 16 times [2025-03-16 13:43:55,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:43:55,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982245891] [2025-03-16 13:43:55,493 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:43:55,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:43:55,498 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 55 statements into 2 equivalence classes. [2025-03-16 13:43:55,509 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 53 of 55 statements. [2025-03-16 13:43:55,509 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:43:55,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2025-03-16 13:43:55,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:43:55,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982245891] [2025-03-16 13:43:55,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982245891] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:43:55,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218774696] [2025-03-16 13:43:55,651 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:43:55,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:55,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:43:55,654 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) [2025-03-16 13:43:55,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-16 13:43:55,695 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 55 statements into 2 equivalence classes. [2025-03-16 13:43:55,717 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 53 of 55 statements. [2025-03-16 13:43:55,717 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:43:55,718 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:55,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-16 13:43:55,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:43:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2025-03-16 13:43:55,813 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:43:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2025-03-16 13:43:55,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218774696] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:43:55,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:43:55,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2025-03-16 13:43:55,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149463212] [2025-03-16 13:43:55,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:43:55,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-16 13:43:55,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:43:55,902 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-16 13:43:55,902 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2025-03-16 13:43:55,902 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2025-03-16 13:43:56,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:43:56,138 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2025-03-16 13:43:56,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-16 13:43:56,138 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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 55 [2025-03-16 13:43:56,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:43:56,139 INFO L225 Difference]: With dead ends: 92 [2025-03-16 13:43:56,139 INFO L226 Difference]: Without dead ends: 61 [2025-03-16 13:43:56,139 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 89 SyntacticMatches, 15 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=841, Unknown=0, NotChecked=0, Total=1122 [2025-03-16 13:43:56,139 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 28 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:43:56,139 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 14 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:43:56,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-03-16 13:43:56,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2025-03-16 13:43:56,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 60 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) [2025-03-16 13:43:56,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2025-03-16 13:43:56,156 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 55 [2025-03-16 13:43:56,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:43:56,156 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2025-03-16 13:43:56,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2025-03-16 13:43:56,156 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2025-03-16 13:43:56,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-03-16 13:43:56,157 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:43:56,157 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:43:56,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-16 13:43:56,357 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 [2025-03-16 13:43:56,357 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:43:56,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:43:56,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1528700297, now seen corresponding path program 17 times [2025-03-16 13:43:56,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:43:56,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097652294] [2025-03-16 13:43:56,358 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:43:56,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:43:56,364 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 60 statements into 5 equivalence classes. [2025-03-16 13:43:56,406 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 60 of 60 statements. [2025-03-16 13:43:56,407 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-16 13:43:56,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:44:01,926 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:44:01,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:44:01,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097652294] [2025-03-16 13:44:01,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097652294] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:44:01,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2959822] [2025-03-16 13:44:01,927 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:44:01,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:44:01,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:44:01,928 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) [2025-03-16 13:44:01,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-16 13:44:01,970 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 60 statements into 5 equivalence classes. [2025-03-16 13:44:02,059 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 60 of 60 statements. [2025-03-16 13:44:02,059 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-16 13:44:02,059 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:44:02,062 WARN L254 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 201 conjuncts are in the unsatisfiable core [2025-03-16 13:44:02,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:44:02,144 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 [2025-03-16 13:44:02,185 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 [2025-03-16 13:44:02,229 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 [2025-03-16 13:44:02,271 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 [2025-03-16 13:44:02,315 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 [2025-03-16 13:44:02,359 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 [2025-03-16 13:44:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:44:03,365 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:44:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-16 13:44:04,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2959822] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:44:04,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:44:04,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 26, 19] total 95 [2025-03-16 13:44:04,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828005834] [2025-03-16 13:44:04,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:44:04,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2025-03-16 13:44:04,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:44:04,564 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2025-03-16 13:44:04,565 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=8572, Unknown=0, NotChecked=0, Total=8930 [2025-03-16 13:44:04,565 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 95 states, 95 states have (on average 1.7473684210526317) internal successors, (166), 95 states have internal predecessors, (166), 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) [2025-03-16 13:44:08,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:44:08,817 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2025-03-16 13:44:08,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2025-03-16 13:44:08,818 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.7473684210526317) internal successors, (166), 95 states have internal predecessors, (166), 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 [2025-03-16 13:44:08,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:44:08,819 INFO L225 Difference]: With dead ends: 105 [2025-03-16 13:44:08,819 INFO L226 Difference]: Without dead ends: 102 [2025-03-16 13:44:08,820 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4732 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=786, Invalid=20676, Unknown=0, NotChecked=0, Total=21462 [2025-03-16 13:44:08,820 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 2722 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 2731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:44:08,821 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 136 Invalid, 2731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2722 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-03-16 13:44:08,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-03-16 13:44:08,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2025-03-16 13:44:08,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.127659574468085) internal successors, (106), 94 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) [2025-03-16 13:44:08,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2025-03-16 13:44:08,847 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 60 [2025-03-16 13:44:08,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:44:08,847 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2025-03-16 13:44:08,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.7473684210526317) internal successors, (166), 95 states have internal predecessors, (166), 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) [2025-03-16 13:44:08,847 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2025-03-16 13:44:08,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-16 13:44:08,847 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:44:08,848 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:44:08,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-16 13:44:09,048 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 [2025-03-16 13:44:09,048 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:44:09,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:44:09,048 INFO L85 PathProgramCache]: Analyzing trace with hash -145037204, now seen corresponding path program 18 times [2025-03-16 13:44:09,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:44:09,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319617972] [2025-03-16 13:44:09,048 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:44:09,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:44:09,059 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 61 statements into 5 equivalence classes. [2025-03-16 13:44:09,074 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 61 of 61 statements. [2025-03-16 13:44:09,075 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-16 13:44:09,075 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:44:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-03-16 13:44:09,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:44:09,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319617972] [2025-03-16 13:44:09,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319617972] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:44:09,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630329317] [2025-03-16 13:44:09,265 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:44:09,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:44:09,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:44:09,267 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) [2025-03-16 13:44:09,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-16 13:44:09,311 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 61 statements into 5 equivalence classes. [2025-03-16 13:44:09,347 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 61 of 61 statements. [2025-03-16 13:44:09,347 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-16 13:44:09,347 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:44:09,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-16 13:44:09,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:44:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 43 proven. 28 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2025-03-16 13:44:09,544 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:44:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 35 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2025-03-16 13:44:09,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630329317] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:44:09,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:44:09,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 31 [2025-03-16 13:44:09,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982296754] [2025-03-16 13:44:09,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:44:09,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-16 13:44:09,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:44:09,710 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-16 13:44:09,710 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2025-03-16 13:44:09,710 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 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) [2025-03-16 13:44:10,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:44:10,038 INFO L93 Difference]: Finished difference Result 199 states and 225 transitions. [2025-03-16 13:44:10,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-16 13:44:10,038 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 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) Word has length 61 [2025-03-16 13:44:10,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:44:10,039 INFO L225 Difference]: With dead ends: 199 [2025-03-16 13:44:10,039 INFO L226 Difference]: Without dead ends: 106 [2025-03-16 13:44:10,039 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 102 SyntacticMatches, 16 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=379, Invalid=1103, Unknown=0, NotChecked=0, Total=1482 [2025-03-16 13:44:10,040 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:44:10,040 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 20 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:44:10,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2025-03-16 13:44:10,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 99. [2025-03-16 13:44:10,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1122448979591837) internal successors, (109), 98 states have internal predecessors, (109), 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) [2025-03-16 13:44:10,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2025-03-16 13:44:10,070 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 61 [2025-03-16 13:44:10,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:44:10,070 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2025-03-16 13:44:10,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 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) [2025-03-16 13:44:10,070 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2025-03-16 13:44:10,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-16 13:44:10,070 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:44:10,070 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:44:10,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-16 13:44:10,270 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 [2025-03-16 13:44:10,271 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:44:10,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:44:10,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1738211081, now seen corresponding path program 19 times [2025-03-16 13:44:10,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:44:10,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539284758] [2025-03-16 13:44:10,271 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:44:10,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:44:10,277 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-16 13:44:10,282 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-16 13:44:10,282 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:44:10,282 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:44:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2025-03-16 13:44:10,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:44:10,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539284758] [2025-03-16 13:44:10,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539284758] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:44:10,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880717709] [2025-03-16 13:44:10,466 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:44:10,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:44:10,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:44:10,469 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) [2025-03-16 13:44:10,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-16 13:44:10,518 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-16 13:44:10,547 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-16 13:44:10,547 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:44:10,547 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:44:10,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-16 13:44:10,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:44:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2025-03-16 13:44:10,696 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:44:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2025-03-16 13:44:10,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880717709] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:44:10,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:44:10,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2025-03-16 13:44:10,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862964142] [2025-03-16 13:44:10,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:44:10,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-16 13:44:10,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:44:10,844 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-16 13:44:10,844 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2025-03-16 13:44:10,844 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 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) [2025-03-16 13:44:11,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:44:11,140 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2025-03-16 13:44:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-16 13:44:11,141 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 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 62 [2025-03-16 13:44:11,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:44:11,141 INFO L225 Difference]: With dead ends: 103 [2025-03-16 13:44:11,141 INFO L226 Difference]: Without dead ends: 68 [2025-03-16 13:44:11,142 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 98 SyntacticMatches, 16 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=346, Invalid=1136, Unknown=0, NotChecked=0, Total=1482 [2025-03-16 13:44:11,142 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:44:11,142 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 20 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:44:11,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-16 13:44:11,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2025-03-16 13:44:11,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 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) [2025-03-16 13:44:11,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2025-03-16 13:44:11,165 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 62 [2025-03-16 13:44:11,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:44:11,165 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2025-03-16 13:44:11,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 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) [2025-03-16 13:44:11,166 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2025-03-16 13:44:11,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-03-16 13:44:11,166 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:44:11,166 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:44:11,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-16 13:44:11,366 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 [2025-03-16 13:44:11,366 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:44:11,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:44:11,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1285010668, now seen corresponding path program 20 times [2025-03-16 13:44:11,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:44:11,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347111961] [2025-03-16 13:44:11,367 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:44:11,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:44:11,373 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 67 statements into 2 equivalence classes. [2025-03-16 13:44:11,394 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 67 of 67 statements. [2025-03-16 13:44:11,394 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:44:11,394 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat