./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/loop-zilu/benchmark23_conjunctive.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version da043454 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 ../../../trunk/examples/svcomp/loop-zilu/benchmark23_conjunctive.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 61ef2f8a78b1c2af8ddc8defea2954950b17db5e561108fd4a8b6f210c384bc2 --- Real Ultimate output --- This is Ultimate 0.3.0-wip.fs.system-includes-da04345-m [2025-04-29 10:58:19,629 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-29 10:58:19,668 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-29 10:58:19,671 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-29 10:58:19,671 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-29 10:58:19,689 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-29 10:58:19,690 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-29 10:58:19,690 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-29 10:58:19,690 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-29 10:58:19,690 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-29 10:58:19,690 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-29 10:58:19,690 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-29 10:58:19,691 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-29 10:58:19,691 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-29 10:58:19,691 INFO L153 SettingsManager]: * Use SBE=true [2025-04-29 10:58:19,691 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-29 10:58:19,691 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-29 10:58:19,691 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-29 10:58:19,691 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-29 10:58:19,691 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-29 10:58:19,691 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-29 10:58:19,691 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-29 10:58:19,692 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-29 10:58:19,692 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-29 10:58:19,692 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-29 10:58:19,692 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-29 10:58:19,692 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-29 10:58:19,692 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-29 10:58:19,692 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-29 10:58:19,692 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-29 10:58:19,692 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-29 10:58:19,692 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-29 10:58:19,692 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 10:58:19,693 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-29 10:58:19,693 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-29 10:58:19,693 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-29 10:58:19,693 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-29 10:58:19,693 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 10:58:19,693 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-29 10:58:19,693 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-29 10:58:19,693 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-29 10:58:19,693 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-29 10:58:19,693 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-29 10:58:19,693 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-29 10:58:19,694 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-29 10:58:19,694 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-29 10:58:19,694 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-29 10:58:19,694 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 -> 61ef2f8a78b1c2af8ddc8defea2954950b17db5e561108fd4a8b6f210c384bc2 [2025-04-29 10:58:19,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-29 10:58:19,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-29 10:58:19,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-29 10:58:19,885 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-29 10:58:19,886 INFO L274 PluginConnector]: CDTParser initialized [2025-04-29 10:58:19,887 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark23_conjunctive.c [2025-04-29 10:58:21,195 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c876f596d/07d6c71b61494fdb85dd17199315d734/FLAG9ce1707f7 [2025-04-29 10:58:21,370 INFO L389 CDTParser]: Found 1 translation units. [2025-04-29 10:58:21,370 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark23_conjunctive.c [2025-04-29 10:58:21,372 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 10:58:21,386 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c876f596d/07d6c71b61494fdb85dd17199315d734/FLAG9ce1707f7 [2025-04-29 10:58:22,245 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c876f596d/07d6c71b61494fdb85dd17199315d734 [2025-04-29 10:58:22,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-29 10:58:22,248 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-04-29 10:58:22,250 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-29 10:58:22,250 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-29 10:58:22,253 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-29 10:58:22,254 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.04 10:58:22" (1/1) ... [2025-04-29 10:58:22,254 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34e8ee81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:22, skipping insertion in model container [2025-04-29 10:58:22,254 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.04 10:58:22" (1/1) ... [2025-04-29 10:58:22,264 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-29 10:58:22,419 WARN L117 LibraryModelHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark23_conjunctive.c[195,208] [2025-04-29 10:58:22,435 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-29 10:58:22,440 INFO L200 MainTranslator]: Completed pre-run [2025-04-29 10:58:22,458 WARN L117 LibraryModelHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark23_conjunctive.c[195,208] [2025-04-29 10:58:22,467 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-29 10:58:22,477 INFO L204 MainTranslator]: Completed translation [2025-04-29 10:58:22,478 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:22 WrapperNode [2025-04-29 10:58:22,479 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-29 10:58:22,480 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-29 10:58:22,480 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-29 10:58:22,480 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-29 10:58:22,485 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:22" (1/1) ... [2025-04-29 10:58:22,490 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:22" (1/1) ... [2025-04-29 10:58:22,503 INFO L138 Inliner]: procedures = 7, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 24 [2025-04-29 10:58:22,503 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-29 10:58:22,505 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-29 10:58:22,505 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-29 10:58:22,505 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-29 10:58:22,511 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:22" (1/1) ... [2025-04-29 10:58:22,511 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:22" (1/1) ... [2025-04-29 10:58:22,513 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:22" (1/1) ... [2025-04-29 10:58:22,518 INFO L175 MemorySlicer]: No memory access in input program. [2025-04-29 10:58:22,518 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:22" (1/1) ... [2025-04-29 10:58:22,518 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:22" (1/1) ... [2025-04-29 10:58:22,519 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:22" (1/1) ... [2025-04-29 10:58:22,521 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:22" (1/1) ... [2025-04-29 10:58:22,523 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:22" (1/1) ... [2025-04-29 10:58:22,525 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:22" (1/1) ... [2025-04-29 10:58:22,525 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:22" (1/1) ... [2025-04-29 10:58:22,527 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-29 10:58:22,528 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-29 10:58:22,529 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-29 10:58:22,529 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-29 10:58:22,530 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:22" (1/1) ... [2025-04-29 10:58:22,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 10:58:22,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 10:58:22,555 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) [2025-04-29 10:58:22,557 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 [2025-04-29 10:58:22,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-29 10:58:22,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-29 10:58:22,605 INFO L234 CfgBuilder]: Building ICFG [2025-04-29 10:58:22,606 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-29 10:58:22,663 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-04-29 10:58:22,663 INFO L283 CfgBuilder]: Performing block encoding [2025-04-29 10:58:22,670 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-29 10:58:22,670 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-29 10:58:22,671 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 10:58:22 BoogieIcfgContainer [2025-04-29 10:58:22,671 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-29 10:58:22,674 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-29 10:58:22,674 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-29 10:58:22,677 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-29 10:58:22,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.04 10:58:22" (1/3) ... [2025-04-29 10:58:22,679 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@297ef601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.04 10:58:22, skipping insertion in model container [2025-04-29 10:58:22,680 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:22" (2/3) ... [2025-04-29 10:58:22,680 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@297ef601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.04 10:58:22, skipping insertion in model container [2025-04-29 10:58:22,680 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 10:58:22" (3/3) ... [2025-04-29 10:58:22,681 INFO L128 eAbstractionObserver]: Analyzing ICFG benchmark23_conjunctive.c [2025-04-29 10:58:22,691 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-29 10:58:22,692 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG benchmark23_conjunctive.c that has 1 procedures, 11 locations, 13 edges, 1 initial locations, 1 loop locations, and 1 error locations. [2025-04-29 10:58:22,733 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-29 10:58:22,744 INFO L340 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;@4810e0b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-29 10:58:22,744 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-04-29 10:58:22,747 INFO L278 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:22,750 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-04-29 10:58:22,750 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 10:58:22,751 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-04-29 10:58:22,751 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-29 10:58:22,755 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 10:58:22,756 INFO L85 PathProgramCache]: Analyzing trace with hash 889572266, now seen corresponding path program 1 times [2025-04-29 10:58:22,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 10:58:22,763 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125310398] [2025-04-29 10:58:22,763 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 10:58:22,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 10:58:22,810 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-29 10:58:22,823 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-29 10:58:22,824 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 10:58:22,824 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:22,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:22,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 10:58:22,885 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125310398] [2025-04-29 10:58:22,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125310398] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 10:58:22,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 10:58:22,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-29 10:58:22,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665718822] [2025-04-29 10:58:22,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 10:58:22,889 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-29 10:58:22,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 10:58:22,901 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-29 10:58:22,901 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-29 10:58:22,902 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 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 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:22,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 10:58:22,930 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2025-04-29 10:58:22,931 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-29 10:58:22,932 INFO L79 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2025-04-29 10:58:22,932 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 10:58:22,935 INFO L225 Difference]: With dead ends: 19 [2025-04-29 10:58:22,936 INFO L226 Difference]: Without dead ends: 8 [2025-04-29 10:58:22,937 INFO L436 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 [2025-04-29 10:58:22,939 INFO L437 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-04-29 10:58:22,939 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-04-29 10:58:22,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2025-04-29 10:58:22,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2025-04-29 10:58:22,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:22,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2025-04-29 10:58:22,957 INFO L79 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2025-04-29 10:58:22,957 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 10:58:22,958 INFO L485 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2025-04-29 10:58:22,958 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:22,958 INFO L278 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2025-04-29 10:58:22,958 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-04-29 10:58:22,958 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 10:58:22,958 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-04-29 10:58:22,958 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-29 10:58:22,959 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-29 10:58:22,959 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 10:58:22,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1806873991, now seen corresponding path program 1 times [2025-04-29 10:58:22,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 10:58:22,959 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214953085] [2025-04-29 10:58:22,959 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 10:58:22,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 10:58:22,963 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-29 10:58:22,967 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-29 10:58:22,967 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 10:58:22,967 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:22,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 10:58:22,995 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214953085] [2025-04-29 10:58:22,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214953085] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 10:58:22,995 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429944958] [2025-04-29 10:58:22,995 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 10:58:22,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 10:58:22,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 10:58:22,997 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) [2025-04-29 10:58:22,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-29 10:58:23,016 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-29 10:58:23,021 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-29 10:58:23,021 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 10:58:23,021 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:23,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-29 10:58:23,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 10:58:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:23,045 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 10:58:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:23,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429944958] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 10:58:23,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 10:58:23,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2025-04-29 10:58:23,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149216678] [2025-04-29 10:58:23,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 10:58:23,066 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-29 10:58:23,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 10:58:23,066 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-29 10:58:23,066 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-04-29 10:58:23,066 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:23,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 10:58:23,078 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2025-04-29 10:58:23,078 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-29 10:58:23,078 INFO L79 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 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 7 [2025-04-29 10:58:23,078 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 10:58:23,078 INFO L225 Difference]: With dead ends: 14 [2025-04-29 10:58:23,079 INFO L226 Difference]: Without dead ends: 11 [2025-04-29 10:58:23,079 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-04-29 10:58:23,079 INFO L437 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-04-29 10:58:23,079 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-04-29 10:58:23,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2025-04-29 10:58:23,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2025-04-29 10:58:23,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:23,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2025-04-29 10:58:23,081 INFO L79 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2025-04-29 10:58:23,081 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 10:58:23,082 INFO L485 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2025-04-29 10:58:23,082 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:23,082 INFO L278 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2025-04-29 10:58:23,082 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-04-29 10:58:23,082 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 10:58:23,082 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2025-04-29 10:58:23,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-04-29 10:58:23,282 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 10:58:23,283 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-29 10:58:23,283 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 10:58:23,283 INFO L85 PathProgramCache]: Analyzing trace with hash -304096534, now seen corresponding path program 2 times [2025-04-29 10:58:23,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 10:58:23,283 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379159416] [2025-04-29 10:58:23,283 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 10:58:23,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 10:58:23,293 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-04-29 10:58:23,304 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-04-29 10:58:23,304 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-29 10:58:23,304 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:23,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 10:58:23,400 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379159416] [2025-04-29 10:58:23,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379159416] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 10:58:23,400 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971251653] [2025-04-29 10:58:23,400 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 10:58:23,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 10:58:23,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 10:58:23,402 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) [2025-04-29 10:58:23,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-29 10:58:23,424 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-04-29 10:58:23,432 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-04-29 10:58:23,433 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-29 10:58:23,433 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:23,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-29 10:58:23,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 10:58:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:23,455 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 10:58:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:23,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971251653] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 10:58:23,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 10:58:23,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2025-04-29 10:58:23,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786633572] [2025-04-29 10:58:23,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 10:58:23,527 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-04-29 10:58:23,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 10:58:23,527 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-04-29 10:58:23,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2025-04-29 10:58:23,528 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 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) [2025-04-29 10:58:23,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 10:58:23,548 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2025-04-29 10:58:23,548 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-29 10:58:23,548 INFO L79 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 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 10 [2025-04-29 10:58:23,548 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 10:58:23,548 INFO L225 Difference]: With dead ends: 20 [2025-04-29 10:58:23,549 INFO L226 Difference]: Without dead ends: 17 [2025-04-29 10:58:23,549 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2025-04-29 10:58:23,549 INFO L437 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-04-29 10:58:23,550 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-04-29 10:58:23,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2025-04-29 10:58:23,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2025-04-29 10:58:23,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 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) [2025-04-29 10:58:23,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2025-04-29 10:58:23,554 INFO L79 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2025-04-29 10:58:23,555 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 10:58:23,555 INFO L485 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2025-04-29 10:58:23,555 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 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) [2025-04-29 10:58:23,555 INFO L278 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2025-04-29 10:58:23,555 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-04-29 10:58:23,555 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 10:58:23,555 INFO L218 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2025-04-29 10:58:23,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-04-29 10:58:23,758 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-04-29 10:58:23,758 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-29 10:58:23,760 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 10:58:23,760 INFO L85 PathProgramCache]: Analyzing trace with hash -644356662, now seen corresponding path program 3 times [2025-04-29 10:58:23,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 10:58:23,760 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021059970] [2025-04-29 10:58:23,760 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-29 10:58:23,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 10:58:23,766 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 6 equivalence classes. [2025-04-29 10:58:23,785 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 16 of 16 statements. [2025-04-29 10:58:23,785 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-29 10:58:23,785 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:23,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 10:58:23,989 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021059970] [2025-04-29 10:58:23,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021059970] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 10:58:23,989 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567681112] [2025-04-29 10:58:23,990 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-29 10:58:23,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 10:58:23,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 10:58:23,992 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) [2025-04-29 10:58:23,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-29 10:58:24,017 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 6 equivalence classes. [2025-04-29 10:58:24,032 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 16 of 16 statements. [2025-04-29 10:58:24,033 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-29 10:58:24,033 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:24,033 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-29 10:58:24,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 10:58:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:24,075 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 10:58:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:24,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567681112] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 10:58:24,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 10:58:24,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2025-04-29 10:58:24,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256007289] [2025-04-29 10:58:24,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 10:58:24,278 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-04-29 10:58:24,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 10:58:24,279 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-04-29 10:58:24,279 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2025-04-29 10:58:24,279 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 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) [2025-04-29 10:58:24,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 10:58:24,312 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2025-04-29 10:58:24,312 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-04-29 10:58:24,312 INFO L79 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-04-29 10:58:24,312 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 10:58:24,312 INFO L225 Difference]: With dead ends: 32 [2025-04-29 10:58:24,312 INFO L226 Difference]: Without dead ends: 29 [2025-04-29 10:58:24,313 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2025-04-29 10:58:24,313 INFO L437 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-04-29 10:58:24,313 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-04-29 10:58:24,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-04-29 10:58:24,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2025-04-29 10:58:24,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:24,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2025-04-29 10:58:24,319 INFO L79 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 16 [2025-04-29 10:58:24,319 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 10:58:24,319 INFO L485 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2025-04-29 10:58:24,319 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 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) [2025-04-29 10:58:24,319 INFO L278 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2025-04-29 10:58:24,320 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-04-29 10:58:24,320 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 10:58:24,320 INFO L218 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2025-04-29 10:58:24,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-04-29 10:58:24,520 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 10:58:24,520 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-29 10:58:24,521 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 10:58:24,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1270023050, now seen corresponding path program 4 times [2025-04-29 10:58:24,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 10:58:24,522 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814028865] [2025-04-29 10:58:24,522 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-29 10:58:24,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 10:58:24,527 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-04-29 10:58:24,545 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-04-29 10:58:24,546 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-29 10:58:24,546 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:24,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 10:58:24,949 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814028865] [2025-04-29 10:58:24,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814028865] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 10:58:24,949 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317262865] [2025-04-29 10:58:24,949 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-29 10:58:24,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 10:58:24,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 10:58:24,951 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) [2025-04-29 10:58:24,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-29 10:58:24,977 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-04-29 10:58:24,996 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-04-29 10:58:24,996 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-29 10:58:24,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:24,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-04-29 10:58:24,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 10:58:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:25,051 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 10:58:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:25,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317262865] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 10:58:25,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 10:58:25,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2025-04-29 10:58:25,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294851719] [2025-04-29 10:58:25,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 10:58:25,690 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-04-29 10:58:25,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 10:58:25,691 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-04-29 10:58:25,692 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2025-04-29 10:58:25,692 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:25,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 10:58:25,748 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2025-04-29 10:58:25,748 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-04-29 10:58:25,748 INFO L79 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2025-04-29 10:58:25,749 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 10:58:25,749 INFO L225 Difference]: With dead ends: 56 [2025-04-29 10:58:25,749 INFO L226 Difference]: Without dead ends: 53 [2025-04-29 10:58:25,750 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2025-04-29 10:58:25,750 INFO L437 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-04-29 10:58:25,750 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-04-29 10:58:25,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-04-29 10:58:25,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2025-04-29 10:58:25,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 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) [2025-04-29 10:58:25,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2025-04-29 10:58:25,760 INFO L79 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 28 [2025-04-29 10:58:25,760 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 10:58:25,760 INFO L485 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2025-04-29 10:58:25,761 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:25,761 INFO L278 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2025-04-29 10:58:25,761 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-04-29 10:58:25,761 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 10:58:25,761 INFO L218 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1] [2025-04-29 10:58:25,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-04-29 10:58:25,962 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 10:58:25,962 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-29 10:58:25,962 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 10:58:25,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1432182538, now seen corresponding path program 5 times [2025-04-29 10:58:25,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 10:58:25,963 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971072719] [2025-04-29 10:58:25,963 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-29 10:58:25,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 10:58:25,969 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 52 statements into 24 equivalence classes. [2025-04-29 10:58:26,017 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 52 of 52 statements. [2025-04-29 10:58:26,017 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-04-29 10:58:26,017 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:27,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:27,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 10:58:27,133 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971072719] [2025-04-29 10:58:27,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971072719] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 10:58:27,133 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032106818] [2025-04-29 10:58:27,133 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-29 10:58:27,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 10:58:27,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 10:58:27,135 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) [2025-04-29 10:58:27,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-29 10:58:27,170 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 52 statements into 24 equivalence classes. [2025-04-29 10:58:27,204 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 52 of 52 statements. [2025-04-29 10:58:27,204 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-04-29 10:58:27,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:27,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-04-29 10:58:27,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 10:58:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:27,279 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 10:58:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:29,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032106818] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 10:58:29,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 10:58:29,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 96 [2025-04-29 10:58:29,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679974731] [2025-04-29 10:58:29,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 10:58:29,181 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2025-04-29 10:58:29,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 10:58:29,182 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2025-04-29 10:58:29,185 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2025-04-29 10:58:29,185 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:29,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 10:58:29,291 INFO L93 Difference]: Finished difference Result 104 states and 151 transitions. [2025-04-29 10:58:29,292 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2025-04-29 10:58:29,292 INFO L79 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2025-04-29 10:58:29,292 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 10:58:29,293 INFO L225 Difference]: With dead ends: 104 [2025-04-29 10:58:29,294 INFO L226 Difference]: Without dead ends: 101 [2025-04-29 10:58:29,296 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2025-04-29 10:58:29,296 INFO L437 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-04-29 10:58:29,296 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-04-29 10:58:29,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2025-04-29 10:58:29,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2025-04-29 10:58:29,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:29,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2025-04-29 10:58:29,308 INFO L79 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 52 [2025-04-29 10:58:29,308 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 10:58:29,309 INFO L485 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2025-04-29 10:58:29,309 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:29,309 INFO L278 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2025-04-29 10:58:29,310 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2025-04-29 10:58:29,310 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 10:58:29,310 INFO L218 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1] [2025-04-29 10:58:29,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-04-29 10:58:29,511 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 10:58:29,511 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-29 10:58:29,511 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 10:58:29,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1060989430, now seen corresponding path program 6 times [2025-04-29 10:58:29,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 10:58:29,511 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681338128] [2025-04-29 10:58:29,511 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-29 10:58:29,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 10:58:29,519 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 100 statements into 48 equivalence classes. [2025-04-29 10:58:29,568 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) and asserted 100 of 100 statements. [2025-04-29 10:58:29,568 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2025-04-29 10:58:29,568 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:32,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 10:58:32,990 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681338128] [2025-04-29 10:58:32,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681338128] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 10:58:32,990 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307868034] [2025-04-29 10:58:32,990 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-29 10:58:32,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 10:58:32,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 10:58:32,992 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) [2025-04-29 10:58:32,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-04-29 10:58:33,029 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 100 statements into 48 equivalence classes. [2025-04-29 10:58:33,087 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) and asserted 100 of 100 statements. [2025-04-29 10:58:33,087 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2025-04-29 10:58:33,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:33,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 96 conjuncts are in the unsatisfiable core [2025-04-29 10:58:33,092 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 10:58:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:33,218 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 10:58:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:36,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307868034] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 10:58:36,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 10:58:36,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 102 [2025-04-29 10:58:36,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857308662] [2025-04-29 10:58:36,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 10:58:36,033 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2025-04-29 10:58:36,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 10:58:36,035 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2025-04-29 10:58:36,036 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2025-04-29 10:58:36,036 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 102 states, 102 states have (on average 1.0490196078431373) internal successors, (107), 102 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:36,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 10:58:36,130 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2025-04-29 10:58:36,131 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2025-04-29 10:58:36,131 INFO L79 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.0490196078431373) internal successors, (107), 102 states have internal predecessors, (107), 0 states have call successors, (0), 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 100 [2025-04-29 10:58:36,132 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 10:58:36,133 INFO L225 Difference]: With dead ends: 110 [2025-04-29 10:58:36,133 INFO L226 Difference]: Without dead ends: 107 [2025-04-29 10:58:36,135 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 105 SyntacticMatches, 90 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4455 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2025-04-29 10:58:36,136 INFO L437 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-04-29 10:58:36,136 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-04-29 10:58:36,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2025-04-29 10:58:36,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2025-04-29 10:58:36,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:36,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2025-04-29 10:58:36,142 INFO L79 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 100 [2025-04-29 10:58:36,142 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 10:58:36,142 INFO L485 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2025-04-29 10:58:36,142 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.0490196078431373) internal successors, (107), 102 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:36,142 INFO L278 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2025-04-29 10:58:36,143 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2025-04-29 10:58:36,143 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 10:58:36,143 INFO L218 NwaCegarLoop]: trace histogram [100, 1, 1, 1, 1, 1, 1] [2025-04-29 10:58:36,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-04-29 10:58:36,343 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 10:58:36,344 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-29 10:58:36,344 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 10:58:36,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1158269162, now seen corresponding path program 7 times [2025-04-29 10:58:36,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 10:58:36,344 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414778861] [2025-04-29 10:58:36,344 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-29 10:58:36,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 10:58:36,350 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 106 statements into 1 equivalence classes. [2025-04-29 10:58:36,402 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 106 of 106 statements. [2025-04-29 10:58:36,402 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 10:58:36,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:40,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:40,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 10:58:40,037 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414778861] [2025-04-29 10:58:40,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414778861] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 10:58:40,037 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259470667] [2025-04-29 10:58:40,037 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-29 10:58:40,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 10:58:40,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 10:58:40,039 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) [2025-04-29 10:58:40,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-04-29 10:58:40,073 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 106 statements into 1 equivalence classes. [2025-04-29 10:58:40,115 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 106 of 106 statements. [2025-04-29 10:58:40,115 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 10:58:40,115 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:40,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 205 conjuncts are in the unsatisfiable core [2025-04-29 10:58:40,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 10:58:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:40,328 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 10:58:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:40,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259470667] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 10:58:40,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 10:58:40,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104, 104] total 105 [2025-04-29 10:58:40,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069396086] [2025-04-29 10:58:40,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 10:58:40,491 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2025-04-29 10:58:40,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 10:58:40,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2025-04-29 10:58:40,494 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=10712, Unknown=0, NotChecked=0, Total=10920 [2025-04-29 10:58:40,494 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 105 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 105 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:43,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 10:58:43,192 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2025-04-29 10:58:43,193 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2025-04-29 10:58:43,194 INFO L79 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 105 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2025-04-29 10:58:43,194 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 10:58:43,194 INFO L225 Difference]: With dead ends: 111 [2025-04-29 10:58:43,194 INFO L226 Difference]: Without dead ends: 108 [2025-04-29 10:58:43,196 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=208, Invalid=10712, Unknown=0, NotChecked=0, Total=10920 [2025-04-29 10:58:43,197 INFO L437 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 10608 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 10608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2025-04-29 10:58:43,198 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 312 Invalid, 10608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10608 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2025-04-29 10:58:43,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2025-04-29 10:58:43,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2025-04-29 10:58:43,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0093457943925233) internal successors, (108), 107 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:43,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2025-04-29 10:58:43,206 INFO L79 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2025-04-29 10:58:43,206 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 10:58:43,206 INFO L485 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2025-04-29 10:58:43,206 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 105 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:43,210 INFO L278 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2025-04-29 10:58:43,211 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2025-04-29 10:58:43,211 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 10:58:43,211 INFO L218 NwaCegarLoop]: trace histogram [101, 1, 1, 1, 1, 1, 1] [2025-04-29 10:58:43,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-04-29 10:58:43,411 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 10:58:43,411 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-29 10:58:43,412 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 10:58:43,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1546543175, now seen corresponding path program 8 times [2025-04-29 10:58:43,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 10:58:43,412 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268126797] [2025-04-29 10:58:43,412 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 10:58:43,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 10:58:43,419 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 107 statements into 2 equivalence classes. [2025-04-29 10:58:43,466 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 107 of 107 statements. [2025-04-29 10:58:43,467 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-29 10:58:43,467 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 5151 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:46,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 10:58:46,867 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268126797] [2025-04-29 10:58:46,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268126797] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 10:58:46,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 10:58:46,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2025-04-29 10:58:46,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487569150] [2025-04-29 10:58:46,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 10:58:46,868 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2025-04-29 10:58:46,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 10:58:46,874 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2025-04-29 10:58:46,875 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2025-04-29 10:58:46,875 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand has 103 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 103 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:47,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 10:58:47,126 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2025-04-29 10:58:47,126 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2025-04-29 10:58:47,127 INFO L79 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 103 states have internal predecessors, (107), 0 states have call successors, (0), 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 107 [2025-04-29 10:58:47,127 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 10:58:47,127 INFO L225 Difference]: With dead ends: 108 [2025-04-29 10:58:47,127 INFO L226 Difference]: Without dead ends: 0 [2025-04-29 10:58:47,128 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2025-04-29 10:58:47,128 INFO L437 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-04-29 10:58:47,128 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-04-29 10:58:47,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-04-29 10:58:47,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-04-29 10:58:47,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:47,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-04-29 10:58:47,129 INFO L79 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 107 [2025-04-29 10:58:47,129 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 10:58:47,129 INFO L485 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-29 10:58:47,129 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 103 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:47,129 INFO L278 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-04-29 10:58:47,129 INFO L284 IsEmpty]: Finished isEmpty. No accepting run. [2025-04-29 10:58:47,131 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-04-29 10:58:47,131 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-04-29 10:58:47,133 INFO L422 BasicCegarLoop]: Path program histogram: [8, 1] [2025-04-29 10:58:47,134 INFO L312 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-04-29 10:58:48,071 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-29 10:58:48,103 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.04 10:58:48 BoogieIcfgContainer [2025-04-29 10:58:48,103 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-29 10:58:48,104 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-04-29 10:58:48,104 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-04-29 10:58:48,104 INFO L274 PluginConnector]: Witness Printer initialized [2025-04-29 10:58:48,104 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 10:58:22" (3/4) ... [2025-04-29 10:58:48,105 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-04-29 10:58:48,114 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2025-04-29 10:58:48,114 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-04-29 10:58:48,114 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2025-04-29 10:58:48,170 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-04-29 10:58:48,171 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-04-29 10:58:48,171 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-04-29 10:58:48,172 INFO L158 Benchmark]: Toolchain (without parser) took 25923.36ms. Allocated memory was 142.6MB in the beginning and 520.1MB in the end (delta: 377.5MB). Free memory was 113.0MB in the beginning and 333.9MB in the end (delta: -220.8MB). Peak memory consumption was 155.3MB. Max. memory is 16.1GB. [2025-04-29 10:58:48,172 INFO L158 Benchmark]: CDTParser took 0.68ms. Allocated memory is still 201.3MB. Free memory is still 124.6MB. There was no memory consumed. Max. memory is 16.1GB. [2025-04-29 10:58:48,173 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.97ms. Allocated memory is still 142.6MB. Free memory was 113.0MB in the beginning and 99.4MB in the end (delta: 13.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-04-29 10:58:48,173 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.30ms. Allocated memory is still 142.6MB. Free memory was 99.4MB in the beginning and 97.9MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-04-29 10:58:48,173 INFO L158 Benchmark]: Boogie Preprocessor took 22.70ms. Allocated memory is still 142.6MB. Free memory was 97.9MB in the beginning and 97.0MB in the end (delta: 910.4kB). There was no memory consumed. Max. memory is 16.1GB. [2025-04-29 10:58:48,173 INFO L158 Benchmark]: RCFGBuilder took 142.58ms. Allocated memory is still 142.6MB. Free memory was 97.0MB in the beginning and 87.0MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-04-29 10:58:48,173 INFO L158 Benchmark]: TraceAbstraction took 25429.36ms. Allocated memory was 142.6MB in the beginning and 520.1MB in the end (delta: 377.5MB). Free memory was 86.6MB in the beginning and 338.2MB in the end (delta: -251.6MB). Peak memory consumption was 283.4MB. Max. memory is 16.1GB. [2025-04-29 10:58:48,174 INFO L158 Benchmark]: Witness Printer took 67.50ms. Allocated memory is still 520.1MB. Free memory was 338.2MB in the beginning and 333.9MB in the end (delta: 4.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-04-29 10:58:48,178 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.68ms. Allocated memory is still 201.3MB. Free memory is still 124.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 228.97ms. Allocated memory is still 142.6MB. Free memory was 113.0MB in the beginning and 99.4MB in the end (delta: 13.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.30ms. Allocated memory is still 142.6MB. Free memory was 99.4MB in the beginning and 97.9MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.70ms. Allocated memory is still 142.6MB. Free memory was 97.9MB in the beginning and 97.0MB in the end (delta: 910.4kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 142.58ms. Allocated memory is still 142.6MB. Free memory was 97.0MB in the beginning and 87.0MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 25429.36ms. Allocated memory was 142.6MB in the beginning and 520.1MB in the end (delta: 377.5MB). Free memory was 86.6MB in the beginning and 338.2MB in the end (delta: -251.6MB). Peak memory consumption was 283.4MB. Max. memory is 16.1GB. * Witness Printer took 67.50ms. Allocated memory is still 520.1MB. Free memory was 338.2MB in the beginning and 333.9MB in the end (delta: 4.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 9]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 13 edges, 1 error locations. Started 1 CEGAR loops. OverallTime: 24.4s, OverallIterations: 9, TraceHistogramMax: 101, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 3.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 452 SdHoareTripleChecker+Invalid, 2.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 397 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11568 IncrementalHoareTripleChecker+Invalid, 11573 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 55 mSDtfsCounter, 11568 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1029 GetRequests, 457 SyntacticMatches, 91 SemanticMatches, 481 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4455 ImplicationChecksByTransitivity, 14.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=108occurred in iteration=8, InterpolantAutomatonStates: 498, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 18.7s InterpolantComputationTime, 751 NumberOfCodeBlocks, 751 NumberOfCodeBlocksAsserted, 171 NumberOfCheckSat, 1047 ConstructedInterpolants, 0 QuantifiedInterpolants, 2962 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1518 ConjunctsInSsa, 394 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 5151/37896 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((j == 124) && (62 == i)) || ((i == 11) && (22 == j))) || ((76 == j) && (i == 38))) || ((41 == i) && (82 == j))) || ((94 == i) && (j == 188))) || ((i == 15) && (30 == j))) || ((i == 63) && (j == 126))) || ((23 == i) && (46 == j))) || ((j == 80) && (40 == i))) || ((134 == j) && (67 == i))) || ((154 == j) && (77 == i))) || ((9 == i) && (j == 18))) || ((i == 4) && (j == 8))) || ((j == 166) && (i == 83))) || ((j == 12) && (6 == i))) || ((88 == i) && (176 == j))) || ((88 == j) && (44 == i))) || ((i == 26) && (52 == j))) || ((i == 39) && (j == 78))) || ((68 == j) && (i == 34))) || ((7 == i) && (14 == j))) || ((32 == j) && (16 == i))) || ((i == 93) && (j == 186))) || ((j == 180) && (i == 90))) || ((j == 26) && (i == 13))) || ((42 == i) && (84 == j))) || ((j == 38) && (19 == i))) || ((68 == i) && (j == 136))) || ((40 == j) && (i == 20))) || ((71 == i) && (142 == j))) || ((i == 8) && (16 == j))) || ((100 <= i) && (200 == j))) || ((56 == i) && (112 == j))) || ((2 == j) && (i == 1))) || ((91 == i) && (j == 182))) || ((156 == j) && (i == 78))) || ((35 == i) && (j == 70))) || ((j == 100) && (i == 50))) || ((j == 50) && (i == 25))) || ((i == 0) && (j == 0))) || ((j == 198) && (i == 99))) || ((108 == j) && (i == 54))) || ((i == 96) && (192 == j))) || ((j == 90) && (i == 45))) || ((144 == j) && (72 == i))) || ((57 == i) && (j == 114))) || ((i == 80) && (160 == j))) || ((i == 79) && (158 == j))) || ((190 == j) && (95 == i))) || ((i == 43) && (j == 86))) || ((j == 60) && (30 == i))) || ((46 == i) && (92 == j))) || ((106 == j) && (53 == i))) || ((i == 33) && (66 == j))) || ((i == 86) && (j == 172))) || ((64 == j) && (32 == i))) || ((i == 60) && (j == 120))) || ((5 == i) && (j == 10))) || ((j == 162) && (81 == i))) || ((29 == i) && (j == 58))) || ((14 == i) && (j == 28))) || ((94 == j) && (47 == i))) || ((i == 28) && (56 == j))) || ((62 == j) && (31 == i))) || ((194 == j) && (97 == i))) || ((i == 55) && (110 == j))) || ((j == 54) && (i == 27))) || ((j == 102) && (51 == i))) || ((164 == j) && (82 == i))) || ((138 == j) && (69 == i))) || ((64 == i) && (j == 128))) || ((j == 130) && (i == 65))) || ((i == 61) && (j == 122))) || ((6 == j) && (3 == i))) || ((104 == j) && (52 == i))) || ((98 == j) && (49 == i))) || ((j == 36) && (i == 18))) || ((196 == j) && (98 == i))) || ((i == 85) && (170 == j))) || ((i == 24) && (j == 48))) || ((152 == j) && (76 == i))) || ((i == 17) && (j == 34))) || ((j == 20) && (i == 10))) || ((66 == i) && (j == 132))) || ((i == 12) && (j == 24))) || ((j == 168) && (84 == i))) || ((i == 70) && (140 == j))) || ((92 == i) && (184 == j))) || ((j == 96) && (i == 48))) || ((j == 4) && (2 == i))) || ((21 == i) && (42 == j))) || ((22 == i) && (44 == j))) || ((146 == j) && (i == 73))) || ((116 == j) && (i == 58))) || ((178 == j) && (89 == i))) || ((i == 37) && (j == 74))) || ((i == 75) && (j == 150))) || ((i == 74) && (148 == j))) || ((i == 36) && (72 == j))) || ((87 == i) && (j == 174))) || ((j == 118) && (59 == i))) RESULT: Ultimate proved your program to be correct! [2025-04-29 10:58:48,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE