./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum5.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 1caf94d5755d978efe1a3e5e557e469a697b8b845c60d509025c0b6bf4eae4ae --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 00:32:32,717 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 00:32:32,776 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 00:32:32,783 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 00:32:32,784 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 00:32:32,805 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 00:32:32,806 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 00:32:32,806 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 00:32:32,807 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 00:32:32,807 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 00:32:32,808 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 00:32:32,808 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 00:32:32,808 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 00:32:32,808 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 00:32:32,808 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 00:32:32,809 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 00:32:32,809 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 00:32:32,809 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 00:32:32,809 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 00:32:32,809 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 00:32:32,809 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 00:32:32,809 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 00:32:32,809 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 00:32:32,809 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 00:32:32,809 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 00:32:32,809 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 00:32:32,810 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 00:32:32,810 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 00:32:32,810 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 00:32:32,810 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 00:32:32,810 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 00:32:32,810 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 00:32:32,810 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 00:32:32,810 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 00:32:32,810 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 00:32:32,811 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 00:32:32,811 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 00:32:32,811 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 00:32:32,811 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 00:32:32,811 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 00:32:32,811 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 00:32:32,811 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 00:32:32,811 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 00:32:32,811 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 -> 1caf94d5755d978efe1a3e5e557e469a697b8b845c60d509025c0b6bf4eae4ae [2025-03-08 00:32:33,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 00:32:33,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 00:32:33,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 00:32:33,062 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 00:32:33,062 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 00:32:33,063 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum5.c [2025-03-08 00:32:34,213 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/249daf8e0/a850a2519120456f8ecfc9a402ac0141/FLAGe03cce792 [2025-03-08 00:32:34,412 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 00:32:34,412 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum5.c [2025-03-08 00:32:34,417 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/249daf8e0/a850a2519120456f8ecfc9a402ac0141/FLAGe03cce792 [2025-03-08 00:32:34,427 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/249daf8e0/a850a2519120456f8ecfc9a402ac0141 [2025-03-08 00:32:34,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 00:32:34,429 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 00:32:34,430 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 00:32:34,430 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 00:32:34,433 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 00:32:34,434 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:32:34" (1/1) ... [2025-03-08 00:32:34,434 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32dcde73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:34, skipping insertion in model container [2025-03-08 00:32:34,434 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:32:34" (1/1) ... [2025-03-08 00:32:34,447 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 00:32:34,544 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_sum5.c[400,413] [2025-03-08 00:32:34,562 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 00:32:34,568 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 00:32:34,576 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_sum5.c[400,413] [2025-03-08 00:32:34,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 00:32:34,599 INFO L204 MainTranslator]: Completed translation [2025-03-08 00:32:34,600 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:34 WrapperNode [2025-03-08 00:32:34,601 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 00:32:34,602 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 00:32:34,602 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 00:32:34,602 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 00:32:34,607 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:34" (1/1) ... [2025-03-08 00:32:34,617 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:34" (1/1) ... [2025-03-08 00:32:34,633 INFO L138 Inliner]: procedures = 15, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 119 [2025-03-08 00:32:34,633 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 00:32:34,634 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 00:32:34,634 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 00:32:34,634 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 00:32:34,639 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:34" (1/1) ... [2025-03-08 00:32:34,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:34" (1/1) ... [2025-03-08 00:32:34,641 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:34" (1/1) ... [2025-03-08 00:32:34,656 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-08 00:32:34,657 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:34" (1/1) ... [2025-03-08 00:32:34,658 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:34" (1/1) ... [2025-03-08 00:32:34,661 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:34" (1/1) ... [2025-03-08 00:32:34,665 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:34" (1/1) ... [2025-03-08 00:32:34,669 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:34" (1/1) ... [2025-03-08 00:32:34,670 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:34" (1/1) ... [2025-03-08 00:32:34,671 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 00:32:34,671 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 00:32:34,671 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 00:32:34,671 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 00:32:34,672 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:34" (1/1) ... [2025-03-08 00:32:34,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 00:32:34,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:34,700 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 00:32:34,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 00:32:34,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 00:32:34,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 00:32:34,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 00:32:34,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-08 00:32:34,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 00:32:34,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 00:32:34,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 00:32:34,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 00:32:34,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 00:32:34,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 00:32:34,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-08 00:32:34,777 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 00:32:34,778 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 00:32:34,959 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-03-08 00:32:34,959 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 00:32:34,968 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 00:32:34,968 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 00:32:34,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:32:34 BoogieIcfgContainer [2025-03-08 00:32:34,969 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 00:32:34,971 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 00:32:34,971 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 00:32:34,974 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 00:32:34,974 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 12:32:34" (1/3) ... [2025-03-08 00:32:34,975 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6437d6a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:32:34, skipping insertion in model container [2025-03-08 00:32:34,976 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:32:34" (2/3) ... [2025-03-08 00:32:34,976 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6437d6a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:32:34, skipping insertion in model container [2025-03-08 00:32:34,976 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:32:34" (3/3) ... [2025-03-08 00:32:34,977 INFO L128 eAbstractionObserver]: Analyzing ICFG zero_sum5.c [2025-03-08 00:32:34,988 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 00:32:34,989 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG zero_sum5.c that has 1 procedures, 22 locations, 1 initial locations, 11 loop locations, and 1 error locations. [2025-03-08 00:32:35,030 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 00:32:35,037 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;@513c6b0e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 00:32:35,037 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 00:32:35,040 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.7) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:35,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-08 00:32:35,043 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:35,044 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:35,044 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:35,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:35,047 INFO L85 PathProgramCache]: Analyzing trace with hash 874873363, now seen corresponding path program 1 times [2025-03-08 00:32:35,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:35,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030436523] [2025-03-08 00:32:35,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:32:35,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:35,104 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 00:32:35,118 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 00:32:35,118 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:32:35,118 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:35,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:32:35,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:35,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030436523] [2025-03-08 00:32:35,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030436523] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:32:35,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:32:35,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 00:32:35,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766868014] [2025-03-08 00:32:35,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:32:35,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 00:32:35,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:35,265 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 00:32:35,265 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 00:32:35,266 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.7) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:35,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:35,327 INFO L93 Difference]: Finished difference Result 41 states and 64 transitions. [2025-03-08 00:32:35,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 00:32:35,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 16 [2025-03-08 00:32:35,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:35,333 INFO L225 Difference]: With dead ends: 41 [2025-03-08 00:32:35,334 INFO L226 Difference]: Without dead ends: 18 [2025-03-08 00:32:35,338 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 00:32:35,340 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:35,340 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:32:35,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-03-08 00:32:35,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2025-03-08 00:32:35,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:35,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 28 transitions. [2025-03-08 00:32:35,363 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 28 transitions. Word has length 16 [2025-03-08 00:32:35,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:35,363 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 28 transitions. [2025-03-08 00:32:35,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:35,364 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 28 transitions. [2025-03-08 00:32:35,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-08 00:32:35,364 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:35,364 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:35,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 00:32:35,365 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:35,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:35,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1764972462, now seen corresponding path program 1 times [2025-03-08 00:32:35,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:35,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660643922] [2025-03-08 00:32:35,366 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:32:35,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:35,382 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-08 00:32:35,390 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 00:32:35,390 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:32:35,390 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:35,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 00:32:35,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:35,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660643922] [2025-03-08 00:32:35,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660643922] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:32:35,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:32:35,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 00:32:35,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392149741] [2025-03-08 00:32:35,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:32:35,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 00:32:35,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:35,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 00:32:35,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 00:32:35,492 INFO L87 Difference]: Start difference. First operand 18 states and 28 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:35,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:35,564 INFO L93 Difference]: Finished difference Result 40 states and 68 transitions. [2025-03-08 00:32:35,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 00:32:35,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 17 [2025-03-08 00:32:35,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:35,565 INFO L225 Difference]: With dead ends: 40 [2025-03-08 00:32:35,565 INFO L226 Difference]: Without dead ends: 28 [2025-03-08 00:32:35,565 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 00:32:35,566 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:35,566 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 7 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:32:35,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-03-08 00:32:35,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2025-03-08 00:32:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2025-03-08 00:32:35,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2025-03-08 00:32:35,571 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 17 [2025-03-08 00:32:35,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:35,571 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2025-03-08 00:32:35,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:35,571 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2025-03-08 00:32:35,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-08 00:32:35,571 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:35,571 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:35,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 00:32:35,572 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:35,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:35,572 INFO L85 PathProgramCache]: Analyzing trace with hash -850661998, now seen corresponding path program 1 times [2025-03-08 00:32:35,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:35,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559475781] [2025-03-08 00:32:35,572 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:32:35,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:35,587 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 00:32:35,608 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 00:32:35,609 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:32:35,609 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 00:32:35,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:35,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559475781] [2025-03-08 00:32:35,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559475781] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:35,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173615686] [2025-03-08 00:32:35,694 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:32:35,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:35,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:35,697 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:32:35,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 00:32:35,742 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 00:32:35,763 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 00:32:35,764 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:32:35,764 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:35,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 00:32:35,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 00:32:35,814 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 00:32:35,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173615686] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:35,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:35,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-08 00:32:35,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563336240] [2025-03-08 00:32:35,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:35,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 00:32:35,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:35,840 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 00:32:35,840 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-03-08 00:32:35,841 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:35,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:35,885 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2025-03-08 00:32:35,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 00:32:35,885 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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 27 [2025-03-08 00:32:35,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:35,886 INFO L225 Difference]: With dead ends: 52 [2025-03-08 00:32:35,886 INFO L226 Difference]: Without dead ends: 29 [2025-03-08 00:32:35,886 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-03-08 00:32:35,886 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:35,886 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:32:35,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-08 00:32:35,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2025-03-08 00:32:35,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:35,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2025-03-08 00:32:35,890 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 27 [2025-03-08 00:32:35,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:35,890 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2025-03-08 00:32:35,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:35,890 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2025-03-08 00:32:35,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-08 00:32:35,890 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:35,890 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:35,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 00:32:36,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:36,091 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:36,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:36,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1334360563, now seen corresponding path program 2 times [2025-03-08 00:32:36,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:36,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656766757] [2025-03-08 00:32:36,092 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:32:36,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:36,100 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-08 00:32:36,117 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 00:32:36,120 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:32:36,120 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 00:32:36,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:36,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656766757] [2025-03-08 00:32:36,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656766757] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:36,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900103769] [2025-03-08 00:32:36,194 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:32:36,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:36,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:36,197 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:32:36,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 00:32:36,229 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-08 00:32:36,247 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 00:32:36,247 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:32:36,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:36,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 00:32:36,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 00:32:36,288 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 00:32:36,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900103769] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:36,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:36,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-03-08 00:32:36,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032749367] [2025-03-08 00:32:36,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:36,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 00:32:36,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:36,318 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 00:32:36,319 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-03-08 00:32:36,319 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:36,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:36,405 INFO L93 Difference]: Finished difference Result 60 states and 88 transitions. [2025-03-08 00:32:36,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 00:32:36,405 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 28 [2025-03-08 00:32:36,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:36,406 INFO L225 Difference]: With dead ends: 60 [2025-03-08 00:32:36,406 INFO L226 Difference]: Without dead ends: 39 [2025-03-08 00:32:36,406 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-03-08 00:32:36,407 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:36,407 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 11 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:32:36,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-03-08 00:32:36,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2025-03-08 00:32:36,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:36,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2025-03-08 00:32:36,412 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 28 [2025-03-08 00:32:36,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:36,413 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2025-03-08 00:32:36,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:36,414 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2025-03-08 00:32:36,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-08 00:32:36,415 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:36,415 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:36,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 00:32:36,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-08 00:32:36,616 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:36,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:36,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1301168973, now seen corresponding path program 3 times [2025-03-08 00:32:36,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:36,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293216606] [2025-03-08 00:32:36,617 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:32:36,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:36,625 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 38 statements into 2 equivalence classes. [2025-03-08 00:32:36,653 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-03-08 00:32:36,653 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 00:32:36,653 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:32:38,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:38,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293216606] [2025-03-08 00:32:38,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293216606] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:38,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237424334] [2025-03-08 00:32:38,438 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:32:38,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:38,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:38,440 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:32:38,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 00:32:38,477 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 38 statements into 2 equivalence classes. [2025-03-08 00:32:38,500 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-03-08 00:32:38,500 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 00:32:38,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:38,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 87 conjuncts are in the unsatisfiable core [2025-03-08 00:32:38,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:38,769 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 00:32:38,769 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:38,985 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:32:38,986 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 35 treesize of output 43 [2025-03-08 00:32:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 00:32:39,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237424334] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:39,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:39,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 21 [2025-03-08 00:32:39,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230040474] [2025-03-08 00:32:39,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:39,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 00:32:39,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:39,049 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 00:32:39,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2025-03-08 00:32:39,050 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:39,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:39,323 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2025-03-08 00:32:39,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 00:32:39,324 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 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) Word has length 38 [2025-03-08 00:32:39,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:39,325 INFO L225 Difference]: With dead ends: 70 [2025-03-08 00:32:39,326 INFO L226 Difference]: Without dead ends: 67 [2025-03-08 00:32:39,327 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2025-03-08 00:32:39,327 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:39,327 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:32:39,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-03-08 00:32:39,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2025-03-08 00:32:39,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.3125) internal successors, (84), 64 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:39,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2025-03-08 00:32:39,341 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 38 [2025-03-08 00:32:39,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:39,342 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2025-03-08 00:32:39,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:39,342 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2025-03-08 00:32:39,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-08 00:32:39,343 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:39,343 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:39,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 00:32:39,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:39,544 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:39,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:39,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1681500750, now seen corresponding path program 4 times [2025-03-08 00:32:39,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:39,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483627118] [2025-03-08 00:32:39,545 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:32:39,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:39,552 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 39 statements into 2 equivalence classes. [2025-03-08 00:32:39,561 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 34 of 39 statements. [2025-03-08 00:32:39,561 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 00:32:39,561 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-03-08 00:32:39,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:39,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483627118] [2025-03-08 00:32:39,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483627118] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:39,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197734290] [2025-03-08 00:32:39,627 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:32:39,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:39,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:39,630 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:32:39,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 00:32:39,666 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 39 statements into 2 equivalence classes. [2025-03-08 00:32:39,694 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 34 of 39 statements. [2025-03-08 00:32:39,694 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 00:32:39,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:39,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 00:32:39,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-03-08 00:32:39,767 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-03-08 00:32:39,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197734290] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:39,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:39,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-03-08 00:32:39,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48436435] [2025-03-08 00:32:39,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:39,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 00:32:39,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:39,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 00:32:39,831 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-03-08 00:32:39,831 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:40,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:40,034 INFO L93 Difference]: Finished difference Result 131 states and 174 transitions. [2025-03-08 00:32:40,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 00:32:40,034 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2025-03-08 00:32:40,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:40,035 INFO L225 Difference]: With dead ends: 131 [2025-03-08 00:32:40,035 INFO L226 Difference]: Without dead ends: 76 [2025-03-08 00:32:40,035 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 69 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2025-03-08 00:32:40,036 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:40,036 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:32:40,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-03-08 00:32:40,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2025-03-08 00:32:40,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.267605633802817) internal successors, (90), 71 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:40,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2025-03-08 00:32:40,048 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 39 [2025-03-08 00:32:40,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:40,049 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2025-03-08 00:32:40,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:40,049 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2025-03-08 00:32:40,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-08 00:32:40,049 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:40,050 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:40,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 00:32:40,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:40,250 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:40,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:40,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1909823890, now seen corresponding path program 5 times [2025-03-08 00:32:40,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:40,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695753522] [2025-03-08 00:32:40,251 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:32:40,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:40,257 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 3 equivalence classes. [2025-03-08 00:32:40,272 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 00:32:40,272 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 00:32:40,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-03-08 00:32:40,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:40,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695753522] [2025-03-08 00:32:40,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695753522] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:40,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252958922] [2025-03-08 00:32:40,345 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:32:40,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:40,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:40,347 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:32:40,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 00:32:40,381 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 3 equivalence classes. [2025-03-08 00:32:40,419 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 00:32:40,419 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 00:32:40,419 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:40,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 00:32:40,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-03-08 00:32:40,475 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-03-08 00:32:40,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252958922] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:40,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:40,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-03-08 00:32:40,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591507949] [2025-03-08 00:32:40,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:40,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 00:32:40,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:40,530 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 00:32:40,530 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-03-08 00:32:40,530 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:40,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:40,678 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2025-03-08 00:32:40,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 00:32:40,679 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2025-03-08 00:32:40,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:40,679 INFO L225 Difference]: With dead ends: 76 [2025-03-08 00:32:40,680 INFO L226 Difference]: Without dead ends: 49 [2025-03-08 00:32:40,680 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2025-03-08 00:32:40,680 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:40,681 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:32:40,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-03-08 00:32:40,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2025-03-08 00:32:40,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:40,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2025-03-08 00:32:40,687 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 39 [2025-03-08 00:32:40,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:40,687 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2025-03-08 00:32:40,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:40,687 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2025-03-08 00:32:40,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-08 00:32:40,687 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:40,687 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:40,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-08 00:32:40,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:40,893 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:40,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:40,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1454994611, now seen corresponding path program 6 times [2025-03-08 00:32:40,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:40,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819641595] [2025-03-08 00:32:40,894 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:32:40,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:40,905 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 48 statements into 3 equivalence classes. [2025-03-08 00:32:40,918 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 48 of 48 statements. [2025-03-08 00:32:40,918 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 00:32:40,918 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-08 00:32:41,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:41,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819641595] [2025-03-08 00:32:41,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819641595] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:41,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118474182] [2025-03-08 00:32:41,012 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:32:41,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:41,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:41,014 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:32:41,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 00:32:41,050 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 48 statements into 3 equivalence classes. [2025-03-08 00:32:41,076 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 48 of 48 statements. [2025-03-08 00:32:41,076 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 00:32:41,076 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:41,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 00:32:41,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-08 00:32:41,144 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:41,203 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-08 00:32:41,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118474182] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:41,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:41,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2025-03-08 00:32:41,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243168097] [2025-03-08 00:32:41,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:41,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 00:32:41,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:41,204 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 00:32:41,204 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2025-03-08 00:32:41,204 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2025-03-08 00:32:41,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:41,277 INFO L93 Difference]: Finished difference Result 93 states and 113 transitions. [2025-03-08 00:32:41,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 00:32:41,278 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 48 [2025-03-08 00:32:41,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:41,278 INFO L225 Difference]: With dead ends: 93 [2025-03-08 00:32:41,278 INFO L226 Difference]: Without dead ends: 50 [2025-03-08 00:32:41,279 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2025-03-08 00:32:41,279 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:41,279 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:32:41,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-03-08 00:32:41,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2025-03-08 00:32:41,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 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) [2025-03-08 00:32:41,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2025-03-08 00:32:41,284 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 48 [2025-03-08 00:32:41,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:41,284 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2025-03-08 00:32:41,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2025-03-08 00:32:41,284 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2025-03-08 00:32:41,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-08 00:32:41,285 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:41,285 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:41,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-08 00:32:41,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:41,486 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:41,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:41,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1533009650, now seen corresponding path program 7 times [2025-03-08 00:32:41,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:41,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910237365] [2025-03-08 00:32:41,486 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:32:41,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:41,492 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-08 00:32:41,603 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-08 00:32:41,604 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:32:41,604 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:32:44,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:44,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910237365] [2025-03-08 00:32:44,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910237365] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:44,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708508291] [2025-03-08 00:32:44,579 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:32:44,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:44,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:44,583 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:32:44,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 00:32:44,629 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-08 00:32:44,660 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-08 00:32:44,660 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:32:44,660 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:44,663 WARN L254 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 138 conjuncts are in the unsatisfiable core [2025-03-08 00:32:44,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:44,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 00:32:45,005 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:32:45,005 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 00:32:45,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708508291] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:45,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:45,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 15, 11] total 47 [2025-03-08 00:32:45,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944157170] [2025-03-08 00:32:45,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:45,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-03-08 00:32:45,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:45,333 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-03-08 00:32:45,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1987, Unknown=0, NotChecked=0, Total=2162 [2025-03-08 00:32:45,334 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 47 states, 47 states have (on average 2.765957446808511) internal successors, (130), 47 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:47,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:47,556 INFO L93 Difference]: Finished difference Result 204 states and 262 transitions. [2025-03-08 00:32:47,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-03-08 00:32:47,557 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.765957446808511) internal successors, (130), 47 states have internal predecessors, (130), 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 49 [2025-03-08 00:32:47,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:47,557 INFO L225 Difference]: With dead ends: 204 [2025-03-08 00:32:47,557 INFO L226 Difference]: Without dead ends: 142 [2025-03-08 00:32:47,560 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=500, Invalid=4612, Unknown=0, NotChecked=0, Total=5112 [2025-03-08 00:32:47,561 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 2296 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 2845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 2296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:47,561 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 78 Invalid, 2845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [549 Valid, 2296 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-03-08 00:32:47,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2025-03-08 00:32:47,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 81. [2025-03-08 00:32:47,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.2375) internal successors, (99), 80 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:47,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 99 transitions. [2025-03-08 00:32:47,575 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 99 transitions. Word has length 49 [2025-03-08 00:32:47,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:47,575 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 99 transitions. [2025-03-08 00:32:47,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.765957446808511) internal successors, (130), 47 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:47,575 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 99 transitions. [2025-03-08 00:32:47,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-08 00:32:47,575 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:47,575 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:47,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-08 00:32:47,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:47,776 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:47,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:47,777 INFO L85 PathProgramCache]: Analyzing trace with hash -2058268206, now seen corresponding path program 8 times [2025-03-08 00:32:47,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:47,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632457673] [2025-03-08 00:32:47,777 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:32:47,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:47,785 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 51 statements into 2 equivalence classes. [2025-03-08 00:32:47,791 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-03-08 00:32:47,791 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:32:47,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-03-08 00:32:47,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:47,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632457673] [2025-03-08 00:32:47,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632457673] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:47,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442135927] [2025-03-08 00:32:47,883 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:32:47,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:47,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:47,885 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:32:47,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 00:32:47,924 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 51 statements into 2 equivalence classes. [2025-03-08 00:32:47,948 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-03-08 00:32:47,948 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:32:47,948 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:47,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 00:32:47,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-03-08 00:32:48,010 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:48,059 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-03-08 00:32:48,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442135927] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:48,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:48,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-03-08 00:32:48,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365628347] [2025-03-08 00:32:48,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:48,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 00:32:48,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:48,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 00:32:48,060 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2025-03-08 00:32:48,061 INFO L87 Difference]: Start difference. First operand 81 states and 99 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:48,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:48,192 INFO L93 Difference]: Finished difference Result 130 states and 166 transitions. [2025-03-08 00:32:48,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 00:32:48,193 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2025-03-08 00:32:48,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:48,194 INFO L225 Difference]: With dead ends: 130 [2025-03-08 00:32:48,194 INFO L226 Difference]: Without dead ends: 61 [2025-03-08 00:32:48,194 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 88 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2025-03-08 00:32:48,195 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 50 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:48,195 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 22 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:32:48,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-03-08 00:32:48,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2025-03-08 00:32:48,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:48,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2025-03-08 00:32:48,208 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 51 [2025-03-08 00:32:48,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:48,208 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2025-03-08 00:32:48,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:48,209 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2025-03-08 00:32:48,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-03-08 00:32:48,209 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:48,209 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:48,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-08 00:32:48,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-08 00:32:48,410 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:48,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:48,410 INFO L85 PathProgramCache]: Analyzing trace with hash 716586835, now seen corresponding path program 9 times [2025-03-08 00:32:48,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:48,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005689740] [2025-03-08 00:32:48,410 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:32:48,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:48,418 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 60 statements into 3 equivalence classes. [2025-03-08 00:32:48,486 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 60 of 60 statements. [2025-03-08 00:32:48,486 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 00:32:48,486 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 00:32:51,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:51,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005689740] [2025-03-08 00:32:51,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005689740] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:51,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915705881] [2025-03-08 00:32:51,773 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:32:51,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:51,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:51,776 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:32:51,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 00:32:51,812 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 60 statements into 3 equivalence classes. [2025-03-08 00:32:51,843 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 60 of 60 statements. [2025-03-08 00:32:51,843 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 00:32:51,843 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:51,847 WARN L254 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 189 conjuncts are in the unsatisfiable core [2025-03-08 00:32:51,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:53,407 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:32:53,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2025-03-08 00:32:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:32:53,473 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:54,833 INFO L349 Elim1Store]: treesize reduction 24, result has 85.5 percent of original size [2025-03-08 00:32:54,834 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 [2025-03-08 00:32:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:32:55,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915705881] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:55,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:55,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 31, 34] total 105 [2025-03-08 00:32:55,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746589443] [2025-03-08 00:32:55,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:55,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2025-03-08 00:32:55,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:55,727 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2025-03-08 00:32:55,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=10155, Unknown=0, NotChecked=0, Total=10920 [2025-03-08 00:32:55,729 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 105 states, 105 states have (on average 1.619047619047619) internal successors, (170), 105 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:59,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:59,079 INFO L93 Difference]: Finished difference Result 185 states and 235 transitions. [2025-03-08 00:32:59,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-08 00:32:59,079 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.619047619047619) internal successors, (170), 105 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2025-03-08 00:32:59,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:59,081 INFO L225 Difference]: With dead ends: 185 [2025-03-08 00:32:59,081 INFO L226 Difference]: Without dead ends: 182 [2025-03-08 00:32:59,084 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6619 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1307, Invalid=15723, Unknown=0, NotChecked=0, Total=17030 [2025-03-08 00:32:59,084 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 4379 mSolverCounterSat, 695 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 5074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 695 IncrementalHoareTripleChecker+Valid, 4379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:59,084 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 130 Invalid, 5074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [695 Valid, 4379 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2025-03-08 00:32:59,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2025-03-08 00:32:59,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 169. [2025-03-08 00:32:59,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.2738095238095237) internal successors, (214), 168 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:59,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 214 transitions. [2025-03-08 00:32:59,116 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 214 transitions. Word has length 60 [2025-03-08 00:32:59,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:59,116 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 214 transitions. [2025-03-08 00:32:59,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.619047619047619) internal successors, (170), 105 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:59,116 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 214 transitions. [2025-03-08 00:32:59,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-08 00:32:59,117 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:59,117 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:59,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-08 00:32:59,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:59,318 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:32:59,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:32:59,318 INFO L85 PathProgramCache]: Analyzing trace with hash 674743026, now seen corresponding path program 10 times [2025-03-08 00:32:59,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:32:59,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468342322] [2025-03-08 00:32:59,318 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:32:59,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:32:59,324 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 61 statements into 2 equivalence classes. [2025-03-08 00:32:59,328 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 54 of 61 statements. [2025-03-08 00:32:59,328 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 00:32:59,328 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:59,411 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-03-08 00:32:59,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:32:59,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468342322] [2025-03-08 00:32:59,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468342322] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:32:59,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900053477] [2025-03-08 00:32:59,411 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:32:59,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:32:59,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:32:59,413 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:32:59,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 00:32:59,452 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 61 statements into 2 equivalence classes. [2025-03-08 00:32:59,474 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 54 of 61 statements. [2025-03-08 00:32:59,474 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 00:32:59,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:32:59,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 00:32:59,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:32:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-03-08 00:32:59,564 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:32:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-03-08 00:32:59,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900053477] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:32:59,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:32:59,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2025-03-08 00:32:59,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406294666] [2025-03-08 00:32:59,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:32:59,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 00:32:59,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:32:59,644 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 00:32:59,644 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-03-08 00:32:59,644 INFO L87 Difference]: Start difference. First operand 169 states and 214 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:59,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:32:59,919 INFO L93 Difference]: Finished difference Result 310 states and 386 transitions. [2025-03-08 00:32:59,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 00:32:59,920 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2025-03-08 00:32:59,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:32:59,921 INFO L225 Difference]: With dead ends: 310 [2025-03-08 00:32:59,921 INFO L226 Difference]: Without dead ends: 120 [2025-03-08 00:32:59,922 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 107 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2025-03-08 00:32:59,922 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:32:59,922 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:32:59,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2025-03-08 00:32:59,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2025-03-08 00:32:59,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.1743119266055047) internal successors, (128), 109 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:59,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 128 transitions. [2025-03-08 00:32:59,939 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 128 transitions. Word has length 61 [2025-03-08 00:32:59,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:32:59,939 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 128 transitions. [2025-03-08 00:32:59,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:32:59,939 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 128 transitions. [2025-03-08 00:32:59,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-08 00:32:59,939 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:32:59,940 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:32:59,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-08 00:33:00,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-08 00:33:00,140 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:00,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:00,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1309273358, now seen corresponding path program 11 times [2025-03-08 00:33:00,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:00,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468649754] [2025-03-08 00:33:00,141 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:33:00,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:00,147 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 61 statements into 4 equivalence classes. [2025-03-08 00:33:00,160 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 61 of 61 statements. [2025-03-08 00:33:00,160 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-08 00:33:00,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-03-08 00:33:00,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:00,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468649754] [2025-03-08 00:33:00,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468649754] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:00,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121613178] [2025-03-08 00:33:00,259 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:33:00,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:00,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:00,261 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:33:00,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 00:33:00,304 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 61 statements into 4 equivalence classes. [2025-03-08 00:33:00,427 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 61 of 61 statements. [2025-03-08 00:33:00,427 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-08 00:33:00,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:00,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 00:33:00,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-03-08 00:33:00,496 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-03-08 00:33:00,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121613178] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:00,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:00,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2025-03-08 00:33:00,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170128672] [2025-03-08 00:33:00,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:00,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 00:33:00,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:00,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 00:33:00,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-03-08 00:33:00,571 INFO L87 Difference]: Start difference. First operand 110 states and 128 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:00,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:00,744 INFO L93 Difference]: Finished difference Result 114 states and 132 transitions. [2025-03-08 00:33:00,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 00:33:00,744 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2025-03-08 00:33:00,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:00,745 INFO L225 Difference]: With dead ends: 114 [2025-03-08 00:33:00,745 INFO L226 Difference]: Without dead ends: 71 [2025-03-08 00:33:00,745 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 106 SyntacticMatches, 11 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2025-03-08 00:33:00,745 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:00,745 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 27 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:33:00,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-03-08 00:33:00,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2025-03-08 00:33:00,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:00,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2025-03-08 00:33:00,756 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 61 [2025-03-08 00:33:00,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:00,756 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2025-03-08 00:33:00,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:00,756 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2025-03-08 00:33:00,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2025-03-08 00:33:00,757 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:00,757 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:00,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-08 00:33:00,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-08 00:33:00,958 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:00,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:00,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1705437011, now seen corresponding path program 12 times [2025-03-08 00:33:00,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:00,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264798320] [2025-03-08 00:33:00,958 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:33:00,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:00,967 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 70 statements into 4 equivalence classes. [2025-03-08 00:33:00,993 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 70 of 70 statements. [2025-03-08 00:33:00,993 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-08 00:33:00,993 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2025-03-08 00:33:01,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:01,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264798320] [2025-03-08 00:33:01,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264798320] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:01,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425994466] [2025-03-08 00:33:01,098 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:33:01,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:01,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:01,100 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:33:01,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 00:33:01,146 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 70 statements into 4 equivalence classes. [2025-03-08 00:33:01,185 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 70 of 70 statements. [2025-03-08 00:33:01,185 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-08 00:33:01,185 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:01,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 00:33:01,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2025-03-08 00:33:01,274 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2025-03-08 00:33:01,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425994466] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:01,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:01,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2025-03-08 00:33:01,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150149786] [2025-03-08 00:33:01,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:01,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 00:33:01,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:01,352 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 00:33:01,352 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2025-03-08 00:33:01,352 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 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) [2025-03-08 00:33:01,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:01,424 INFO L93 Difference]: Finished difference Result 135 states and 155 transitions. [2025-03-08 00:33:01,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 00:33:01,425 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 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 70 [2025-03-08 00:33:01,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:01,425 INFO L225 Difference]: With dead ends: 135 [2025-03-08 00:33:01,425 INFO L226 Difference]: Without dead ends: 72 [2025-03-08 00:33:01,426 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 124 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2025-03-08 00:33:01,426 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:01,426 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:33:01,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2025-03-08 00:33:01,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2025-03-08 00:33:01,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:01,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2025-03-08 00:33:01,437 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 70 [2025-03-08 00:33:01,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:01,437 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2025-03-08 00:33:01,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 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) [2025-03-08 00:33:01,437 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2025-03-08 00:33:01,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-03-08 00:33:01,437 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:01,437 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:01,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-08 00:33:01,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-08 00:33:01,638 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:01,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:01,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1787393966, now seen corresponding path program 13 times [2025-03-08 00:33:01,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:01,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062900145] [2025-03-08 00:33:01,638 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:33:01,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:01,645 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-03-08 00:33:01,732 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-03-08 00:33:01,732 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:33:01,732 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 9 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:33:06,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:06,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062900145] [2025-03-08 00:33:06,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062900145] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:06,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550581232] [2025-03-08 00:33:06,588 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:33:06,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:06,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:06,590 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:33:06,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 00:33:06,636 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-03-08 00:33:06,672 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-03-08 00:33:06,672 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:33:06,672 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:06,675 WARN L254 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 222 conjuncts are in the unsatisfiable core [2025-03-08 00:33:06,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:06,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 00:33:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:33:07,206 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 00:33:07,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550581232] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:07,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:07,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 21, 15] total 68 [2025-03-08 00:33:07,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163240314] [2025-03-08 00:33:07,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:07,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2025-03-08 00:33:07,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:07,830 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2025-03-08 00:33:07,831 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=4295, Unknown=0, NotChecked=0, Total=4556 [2025-03-08 00:33:07,831 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 68 states, 68 states have (on average 2.8088235294117645) internal successors, (191), 68 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:10,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:10,417 INFO L93 Difference]: Finished difference Result 156 states and 193 transitions. [2025-03-08 00:33:10,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-03-08 00:33:10,418 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.8088235294117645) internal successors, (191), 68 states have internal predecessors, (191), 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 71 [2025-03-08 00:33:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:10,419 INFO L225 Difference]: With dead ends: 156 [2025-03-08 00:33:10,419 INFO L226 Difference]: Without dead ends: 153 [2025-03-08 00:33:10,421 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 140 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2182 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=642, Invalid=8288, Unknown=0, NotChecked=0, Total=8930 [2025-03-08 00:33:10,422 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 3436 mSolverCounterSat, 637 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 4073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 637 IncrementalHoareTripleChecker+Valid, 3436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:10,422 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 101 Invalid, 4073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [637 Valid, 3436 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-03-08 00:33:10,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2025-03-08 00:33:10,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 74. [2025-03-08 00:33:10,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 73 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:10,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2025-03-08 00:33:10,440 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 71 [2025-03-08 00:33:10,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:10,440 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2025-03-08 00:33:10,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.8088235294117645) internal successors, (191), 68 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:10,440 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2025-03-08 00:33:10,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-03-08 00:33:10,440 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:10,441 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:10,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-08 00:33:10,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-08 00:33:10,642 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:10,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:10,642 INFO L85 PathProgramCache]: Analyzing trace with hash 425393651, now seen corresponding path program 14 times [2025-03-08 00:33:10,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:10,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624724402] [2025-03-08 00:33:10,642 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:33:10,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:10,651 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 72 statements into 2 equivalence classes. [2025-03-08 00:33:10,657 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 72 of 72 statements. [2025-03-08 00:33:10,658 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:33:10,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:10,784 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2025-03-08 00:33:10,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:10,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624724402] [2025-03-08 00:33:10,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624724402] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:10,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901287082] [2025-03-08 00:33:10,784 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:33:10,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:10,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:10,787 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:33:10,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 00:33:10,836 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 72 statements into 2 equivalence classes. [2025-03-08 00:33:10,869 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 72 of 72 statements. [2025-03-08 00:33:10,869 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:33:10,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:10,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 00:33:10,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2025-03-08 00:33:11,006 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2025-03-08 00:33:11,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901287082] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:11,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:11,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-03-08 00:33:11,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109984066] [2025-03-08 00:33:11,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:11,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 00:33:11,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:11,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 00:33:11,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2025-03-08 00:33:11,096 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:11,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:11,283 INFO L93 Difference]: Finished difference Result 195 states and 226 transitions. [2025-03-08 00:33:11,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 00:33:11,284 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2025-03-08 00:33:11,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:11,284 INFO L225 Difference]: With dead ends: 195 [2025-03-08 00:33:11,285 INFO L226 Difference]: Without dead ends: 75 [2025-03-08 00:33:11,285 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 125 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2025-03-08 00:33:11,285 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:11,285 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:33:11,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2025-03-08 00:33:11,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2025-03-08 00:33:11,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.162162162162162) internal successors, (86), 74 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:11,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2025-03-08 00:33:11,303 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 72 [2025-03-08 00:33:11,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:11,303 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2025-03-08 00:33:11,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:11,303 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2025-03-08 00:33:11,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2025-03-08 00:33:11,304 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:11,304 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:11,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-08 00:33:11,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:11,504 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:11,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:11,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1815717070, now seen corresponding path program 15 times [2025-03-08 00:33:11,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:11,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159396873] [2025-03-08 00:33:11,505 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:33:11,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:11,511 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 73 statements into 4 equivalence classes. [2025-03-08 00:33:11,537 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 73 of 73 statements. [2025-03-08 00:33:11,537 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-08 00:33:11,537 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2025-03-08 00:33:11,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:11,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159396873] [2025-03-08 00:33:11,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159396873] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:11,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566526361] [2025-03-08 00:33:11,662 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:33:11,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:11,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:11,664 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:33:11,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 00:33:11,715 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 73 statements into 4 equivalence classes. [2025-03-08 00:33:11,759 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 73 of 73 statements. [2025-03-08 00:33:11,759 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-08 00:33:11,759 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:11,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 00:33:11,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:11,850 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2025-03-08 00:33:11,850 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2025-03-08 00:33:11,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566526361] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:11,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:11,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-03-08 00:33:11,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192870545] [2025-03-08 00:33:11,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:11,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 00:33:11,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:11,916 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 00:33:11,917 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-03-08 00:33:11,917 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:12,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:12,176 INFO L93 Difference]: Finished difference Result 194 states and 230 transitions. [2025-03-08 00:33:12,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 00:33:12,177 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 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 73 [2025-03-08 00:33:12,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:12,177 INFO L225 Difference]: With dead ends: 194 [2025-03-08 00:33:12,178 INFO L226 Difference]: Without dead ends: 86 [2025-03-08 00:33:12,178 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 132 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2025-03-08 00:33:12,178 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:12,178 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:33:12,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2025-03-08 00:33:12,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2025-03-08 00:33:12,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:12,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2025-03-08 00:33:12,200 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 73 [2025-03-08 00:33:12,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:12,200 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2025-03-08 00:33:12,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:12,200 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2025-03-08 00:33:12,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-03-08 00:33:12,200 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:12,201 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:12,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-08 00:33:12,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-08 00:33:12,405 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:12,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:12,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1557331026, now seen corresponding path program 16 times [2025-03-08 00:33:12,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:12,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863111589] [2025-03-08 00:33:12,405 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:33:12,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:12,415 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 81 statements into 2 equivalence classes. [2025-03-08 00:33:12,421 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 72 of 81 statements. [2025-03-08 00:33:12,421 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 00:33:12,421 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2025-03-08 00:33:12,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:12,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863111589] [2025-03-08 00:33:12,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863111589] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:12,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897252098] [2025-03-08 00:33:12,532 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:33:12,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:12,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:12,534 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:33:12,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 00:33:12,587 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 81 statements into 2 equivalence classes. [2025-03-08 00:33:12,616 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 72 of 81 statements. [2025-03-08 00:33:12,616 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 00:33:12,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:12,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 00:33:12,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2025-03-08 00:33:12,710 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2025-03-08 00:33:12,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897252098] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:12,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:12,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2025-03-08 00:33:12,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095225812] [2025-03-08 00:33:12,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:12,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 00:33:12,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:12,824 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 00:33:12,824 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2025-03-08 00:33:12,825 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:13,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:13,050 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2025-03-08 00:33:13,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 00:33:13,050 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2025-03-08 00:33:13,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:13,051 INFO L225 Difference]: With dead ends: 86 [2025-03-08 00:33:13,051 INFO L226 Difference]: Without dead ends: 83 [2025-03-08 00:33:13,051 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 143 SyntacticMatches, 13 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2025-03-08 00:33:13,051 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:13,052 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 25 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:33:13,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-03-08 00:33:13,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2025-03-08 00:33:13,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:13,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2025-03-08 00:33:13,072 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 81 [2025-03-08 00:33:13,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:13,072 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2025-03-08 00:33:13,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:13,072 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2025-03-08 00:33:13,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2025-03-08 00:33:13,073 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:13,073 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:13,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-08 00:33:13,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-08 00:33:13,273 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:13,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:13,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1032653299, now seen corresponding path program 17 times [2025-03-08 00:33:13,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:13,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467387831] [2025-03-08 00:33:13,274 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:33:13,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:13,283 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 82 statements into 4 equivalence classes. [2025-03-08 00:33:13,505 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 82 of 82 statements. [2025-03-08 00:33:13,506 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-08 00:33:13,506 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:33:18,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:18,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467387831] [2025-03-08 00:33:18,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467387831] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:18,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267525811] [2025-03-08 00:33:18,780 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:33:18,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:18,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:18,782 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:33:18,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 00:33:18,842 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 82 statements into 4 equivalence classes. [2025-03-08 00:33:18,985 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 82 of 82 statements. [2025-03-08 00:33:18,985 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-08 00:33:18,986 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:18,990 WARN L254 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 261 conjuncts are in the unsatisfiable core [2025-03-08 00:33:18,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:19,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 00:33:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:33:19,337 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-08 00:33:19,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267525811] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:19,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:19,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 24, 17] total 51 [2025-03-08 00:33:19,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587812571] [2025-03-08 00:33:19,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:19,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-03-08 00:33:19,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:19,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-03-08 00:33:19,701 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2392, Unknown=0, NotChecked=0, Total=2550 [2025-03-08 00:33:19,702 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand has 51 states, 51 states have (on average 3.9019607843137254) internal successors, (199), 51 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:20,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:20,847 INFO L93 Difference]: Finished difference Result 150 states and 169 transitions. [2025-03-08 00:33:20,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 00:33:20,848 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.9019607843137254) internal successors, (199), 51 states have internal predecessors, (199), 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 82 [2025-03-08 00:33:20,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:20,849 INFO L225 Difference]: With dead ends: 150 [2025-03-08 00:33:20,849 INFO L226 Difference]: Without dead ends: 147 [2025-03-08 00:33:20,849 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=158, Invalid=2392, Unknown=0, NotChecked=0, Total=2550 [2025-03-08 00:33:20,850 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 2871 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 2872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:20,850 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 189 Invalid, 2872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2871 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-03-08 00:33:20,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2025-03-08 00:33:20,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 141. [2025-03-08 00:33:20,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1428571428571428) internal successors, (160), 140 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2025-03-08 00:33:20,891 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 82 [2025-03-08 00:33:20,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:20,891 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2025-03-08 00:33:20,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.9019607843137254) internal successors, (199), 51 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:20,891 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2025-03-08 00:33:20,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2025-03-08 00:33:20,892 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:20,892 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:20,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-08 00:33:21,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:21,097 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:21,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:21,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1947512946, now seen corresponding path program 18 times [2025-03-08 00:33:21,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:21,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007586993] [2025-03-08 00:33:21,098 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:33:21,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:21,107 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 83 statements into 5 equivalence classes. [2025-03-08 00:33:21,134 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 83 of 83 statements. [2025-03-08 00:33:21,134 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-08 00:33:21,134 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2025-03-08 00:33:21,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:21,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007586993] [2025-03-08 00:33:21,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007586993] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:21,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474003217] [2025-03-08 00:33:21,282 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:33:21,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:21,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:21,283 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:33:21,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 00:33:21,333 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 83 statements into 5 equivalence classes. [2025-03-08 00:33:21,377 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 83 of 83 statements. [2025-03-08 00:33:21,377 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-08 00:33:21,377 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:21,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 00:33:21,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2025-03-08 00:33:21,547 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:21,669 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2025-03-08 00:33:21,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474003217] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:21,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:21,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2025-03-08 00:33:21,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594244608] [2025-03-08 00:33:21,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:21,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-08 00:33:21,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:21,670 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-08 00:33:21,670 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2025-03-08 00:33:21,670 INFO L87 Difference]: Start difference. First operand 141 states and 160 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:22,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:22,108 INFO L93 Difference]: Finished difference Result 290 states and 336 transitions. [2025-03-08 00:33:22,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-08 00:33:22,108 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 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 83 [2025-03-08 00:33:22,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:22,109 INFO L225 Difference]: With dead ends: 290 [2025-03-08 00:33:22,109 INFO L226 Difference]: Without dead ends: 153 [2025-03-08 00:33:22,110 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 144 SyntacticMatches, 13 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=1123, Unknown=0, NotChecked=0, Total=1406 [2025-03-08 00:33:22,110 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:22,110 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 00:33:22,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2025-03-08 00:33:22,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2025-03-08 00:33:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.1283783783783783) internal successors, (167), 148 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 167 transitions. [2025-03-08 00:33:22,152 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 167 transitions. Word has length 83 [2025-03-08 00:33:22,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:22,152 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 167 transitions. [2025-03-08 00:33:22,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 167 transitions. [2025-03-08 00:33:22,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2025-03-08 00:33:22,152 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:22,152 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:22,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-08 00:33:22,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:22,353 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:22,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:22,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1737262669, now seen corresponding path program 19 times [2025-03-08 00:33:22,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:22,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625718743] [2025-03-08 00:33:22,353 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:33:22,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:22,365 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 84 statements into 1 equivalence classes. [2025-03-08 00:33:22,373 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 84 of 84 statements. [2025-03-08 00:33:22,373 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:33:22,373 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2025-03-08 00:33:22,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:22,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625718743] [2025-03-08 00:33:22,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625718743] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:22,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511679547] [2025-03-08 00:33:22,535 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:33:22,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:22,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:22,537 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:33:22,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 00:33:22,588 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 84 statements into 1 equivalence classes. [2025-03-08 00:33:22,625 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 84 of 84 statements. [2025-03-08 00:33:22,625 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:33:22,625 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:22,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 00:33:22,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2025-03-08 00:33:22,709 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:22,790 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2025-03-08 00:33:22,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511679547] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:22,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:22,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2025-03-08 00:33:22,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399057762] [2025-03-08 00:33:22,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:22,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-08 00:33:22,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:22,791 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-08 00:33:22,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2025-03-08 00:33:22,791 INFO L87 Difference]: Start difference. First operand 149 states and 167 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:22,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:22,951 INFO L93 Difference]: Finished difference Result 153 states and 171 transitions. [2025-03-08 00:33:22,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 00:33:22,952 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2025-03-08 00:33:22,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:22,952 INFO L225 Difference]: With dead ends: 153 [2025-03-08 00:33:22,952 INFO L226 Difference]: Without dead ends: 94 [2025-03-08 00:33:22,953 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 145 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2025-03-08 00:33:22,953 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:22,953 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 23 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:33:22,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2025-03-08 00:33:22,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2025-03-08 00:33:22,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.118279569892473) internal successors, (104), 93 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:22,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2025-03-08 00:33:22,981 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 84 [2025-03-08 00:33:22,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:22,981 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2025-03-08 00:33:22,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:22,981 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2025-03-08 00:33:22,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-03-08 00:33:22,982 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:22,982 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:22,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-08 00:33:23,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:23,182 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:23,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:23,183 INFO L85 PathProgramCache]: Analyzing trace with hash 582347186, now seen corresponding path program 20 times [2025-03-08 00:33:23,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:23,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694717088] [2025-03-08 00:33:23,183 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:33:23,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:23,190 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 93 statements into 2 equivalence classes. [2025-03-08 00:33:23,247 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 93 of 93 statements. [2025-03-08 00:33:23,247 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:33:23,248 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:33:31,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:31,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694717088] [2025-03-08 00:33:31,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694717088] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:31,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769215579] [2025-03-08 00:33:31,595 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:33:31,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:31,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:31,597 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:33:31,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 00:33:31,652 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 93 statements into 2 equivalence classes. [2025-03-08 00:33:31,700 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 93 of 93 statements. [2025-03-08 00:33:31,700 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:33:31,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:31,704 WARN L254 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 303 conjuncts are in the unsatisfiable core [2025-03-08 00:33:31,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:31,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 00:33:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:33:32,111 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-08 00:33:33,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769215579] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:33,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:33,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 27, 19] total 85 [2025-03-08 00:33:33,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279739867] [2025-03-08 00:33:33,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:33,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2025-03-08 00:33:33,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:33,076 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2025-03-08 00:33:33,077 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=6473, Unknown=0, NotChecked=0, Total=7140 [2025-03-08 00:33:33,077 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 85 states, 85 states have (on average 2.6941176470588237) internal successors, (229), 85 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:36,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:36,048 INFO L93 Difference]: Finished difference Result 212 states and 259 transitions. [2025-03-08 00:33:36,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2025-03-08 00:33:36,049 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.6941176470588237) internal successors, (229), 85 states have internal predecessors, (229), 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 93 [2025-03-08 00:33:36,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:36,050 INFO L225 Difference]: With dead ends: 212 [2025-03-08 00:33:36,051 INFO L226 Difference]: Without dead ends: 209 [2025-03-08 00:33:36,052 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3564 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1246, Invalid=11186, Unknown=0, NotChecked=0, Total=12432 [2025-03-08 00:33:36,054 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 4085 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 4626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 4085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:36,054 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 129 Invalid, 4626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 4085 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2025-03-08 00:33:36,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2025-03-08 00:33:36,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 193. [2025-03-08 00:33:36,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.2395833333333333) internal successors, (238), 192 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:36,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 238 transitions. [2025-03-08 00:33:36,127 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 238 transitions. Word has length 93 [2025-03-08 00:33:36,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:36,127 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 238 transitions. [2025-03-08 00:33:36,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.6941176470588237) internal successors, (229), 85 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:36,127 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 238 transitions. [2025-03-08 00:33:36,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2025-03-08 00:33:36,128 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:36,128 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:36,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-08 00:33:36,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-08 00:33:36,328 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:36,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:36,329 INFO L85 PathProgramCache]: Analyzing trace with hash 872925331, now seen corresponding path program 21 times [2025-03-08 00:33:36,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:36,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037486312] [2025-03-08 00:33:36,329 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:33:36,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:36,336 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 94 statements into 5 equivalence classes. [2025-03-08 00:33:36,392 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 94 of 94 statements. [2025-03-08 00:33:36,393 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-08 00:33:36,393 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2025-03-08 00:33:36,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:36,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037486312] [2025-03-08 00:33:36,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037486312] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:36,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146894153] [2025-03-08 00:33:36,593 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:33:36,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:36,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:36,595 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:33:36,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-08 00:33:36,655 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 94 statements into 5 equivalence classes. [2025-03-08 00:33:36,755 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 94 of 94 statements. [2025-03-08 00:33:36,755 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-08 00:33:36,755 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:36,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 00:33:36,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2025-03-08 00:33:36,904 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2025-03-08 00:33:37,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146894153] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:37,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:37,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2025-03-08 00:33:37,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131178718] [2025-03-08 00:33:37,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:37,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-08 00:33:37,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:37,029 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-08 00:33:37,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2025-03-08 00:33:37,030 INFO L87 Difference]: Start difference. First operand 193 states and 238 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:37,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:37,308 INFO L93 Difference]: Finished difference Result 427 states and 518 transitions. [2025-03-08 00:33:37,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 00:33:37,308 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 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 94 [2025-03-08 00:33:37,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:37,309 INFO L225 Difference]: With dead ends: 427 [2025-03-08 00:33:37,309 INFO L226 Difference]: Without dead ends: 181 [2025-03-08 00:33:37,310 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 163 SyntacticMatches, 15 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2025-03-08 00:33:37,310 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:37,310 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:33:37,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2025-03-08 00:33:37,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2025-03-08 00:33:37,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.2222222222222223) internal successors, (220), 180 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:37,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 220 transitions. [2025-03-08 00:33:37,365 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 220 transitions. Word has length 94 [2025-03-08 00:33:37,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:37,365 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 220 transitions. [2025-03-08 00:33:37,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:37,365 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 220 transitions. [2025-03-08 00:33:37,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2025-03-08 00:33:37,365 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:37,365 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:37,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-03-08 00:33:37,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-03-08 00:33:37,566 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:37,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:37,566 INFO L85 PathProgramCache]: Analyzing trace with hash -2095833966, now seen corresponding path program 22 times [2025-03-08 00:33:37,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:37,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898690765] [2025-03-08 00:33:37,566 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:33:37,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:37,574 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 95 statements into 2 equivalence classes. [2025-03-08 00:33:37,582 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 84 of 95 statements. [2025-03-08 00:33:37,582 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 00:33:37,582 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2025-03-08 00:33:37,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:37,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898690765] [2025-03-08 00:33:37,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898690765] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:37,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449446645] [2025-03-08 00:33:37,758 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:33:37,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:37,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:37,760 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:33:37,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-08 00:33:37,819 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 95 statements into 2 equivalence classes. [2025-03-08 00:33:37,855 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 84 of 95 statements. [2025-03-08 00:33:37,855 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 00:33:37,855 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:37,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 00:33:37,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2025-03-08 00:33:38,006 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2025-03-08 00:33:38,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449446645] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:38,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:38,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 27 [2025-03-08 00:33:38,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80514311] [2025-03-08 00:33:38,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:38,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-08 00:33:38,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:38,124 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-08 00:33:38,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2025-03-08 00:33:38,124 INFO L87 Difference]: Start difference. First operand 181 states and 220 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:38,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:38,520 INFO L93 Difference]: Finished difference Result 381 states and 450 transitions. [2025-03-08 00:33:38,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 00:33:38,520 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2025-03-08 00:33:38,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:38,522 INFO L225 Difference]: With dead ends: 381 [2025-03-08 00:33:38,522 INFO L226 Difference]: Without dead ends: 172 [2025-03-08 00:33:38,522 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 166 SyntacticMatches, 16 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=311, Invalid=879, Unknown=0, NotChecked=0, Total=1190 [2025-03-08 00:33:38,522 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:38,522 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 37 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 00:33:38,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2025-03-08 00:33:38,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2025-03-08 00:33:38,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1137724550898203) internal successors, (186), 167 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:38,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 186 transitions. [2025-03-08 00:33:38,571 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 186 transitions. Word has length 95 [2025-03-08 00:33:38,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:38,571 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 186 transitions. [2025-03-08 00:33:38,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:38,572 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 186 transitions. [2025-03-08 00:33:38,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2025-03-08 00:33:38,572 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:38,572 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:38,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-08 00:33:38,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:38,773 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:38,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:38,773 INFO L85 PathProgramCache]: Analyzing trace with hash -126831182, now seen corresponding path program 23 times [2025-03-08 00:33:38,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:38,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006889766] [2025-03-08 00:33:38,773 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:33:38,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:38,780 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 95 statements into 5 equivalence classes. [2025-03-08 00:33:38,803 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 95 of 95 statements. [2025-03-08 00:33:38,803 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 00:33:38,803 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2025-03-08 00:33:38,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:38,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006889766] [2025-03-08 00:33:38,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006889766] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:38,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333532455] [2025-03-08 00:33:38,963 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:33:38,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:38,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:38,965 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:33:38,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-08 00:33:39,026 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 95 statements into 5 equivalence classes. [2025-03-08 00:33:39,806 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 95 of 95 statements. [2025-03-08 00:33:39,806 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 00:33:39,806 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:39,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 00:33:39,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2025-03-08 00:33:39,902 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:33:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2025-03-08 00:33:39,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333532455] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:33:39,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:33:39,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 27 [2025-03-08 00:33:39,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400186629] [2025-03-08 00:33:39,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:33:40,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-08 00:33:40,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:33:40,000 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-08 00:33:40,000 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2025-03-08 00:33:40,000 INFO L87 Difference]: Start difference. First operand 168 states and 186 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:40,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:33:40,234 INFO L93 Difference]: Finished difference Result 172 states and 190 transitions. [2025-03-08 00:33:40,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-08 00:33:40,235 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2025-03-08 00:33:40,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:33:40,236 INFO L225 Difference]: With dead ends: 172 [2025-03-08 00:33:40,236 INFO L226 Difference]: Without dead ends: 105 [2025-03-08 00:33:40,236 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 165 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2025-03-08 00:33:40,236 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:33:40,237 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 17 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:33:40,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2025-03-08 00:33:40,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2025-03-08 00:33:40,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1057692307692308) internal successors, (115), 104 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:40,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2025-03-08 00:33:40,280 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 95 [2025-03-08 00:33:40,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:33:40,280 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2025-03-08 00:33:40,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:33:40,280 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2025-03-08 00:33:40,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2025-03-08 00:33:40,280 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:33:40,281 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:33:40,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-08 00:33:40,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:40,481 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:33:40,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:33:40,481 INFO L85 PathProgramCache]: Analyzing trace with hash 470817939, now seen corresponding path program 24 times [2025-03-08 00:33:40,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:33:40,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665466951] [2025-03-08 00:33:40,482 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:33:40,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:33:40,489 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 104 statements into 5 equivalence classes. [2025-03-08 00:33:40,635 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 104 of 104 statements. [2025-03-08 00:33:40,636 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-08 00:33:40,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:50,642 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-08 00:33:50,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:33:50,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665466951] [2025-03-08 00:33:50,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665466951] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:33:50,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093746557] [2025-03-08 00:33:50,642 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:33:50,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:33:50,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:33:50,644 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:33:50,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-08 00:33:50,707 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 104 statements into 5 equivalence classes. [2025-03-08 00:33:50,899 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 104 of 104 statements. [2025-03-08 00:33:50,899 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-08 00:33:50,899 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:33:50,905 WARN L254 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 361 conjuncts are in the unsatisfiable core [2025-03-08 00:33:50,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:33:51,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-08 00:33:56,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:33:56,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:33:56,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:33:56,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:33:56,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:33:56,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:33:56,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:33:56,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:33:56,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:33:56,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:33:56,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:33:56,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:33:56,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:33:56,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:33:56,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:33:56,141 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:33:56,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 86 treesize of output 185 [2025-03-08 00:33:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 2 proven. 393 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 00:33:56,337 INFO L312 TraceCheckSpWp]: Computing backward predicates...