./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-programs/partial_mod_count_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-programs/partial_mod_count_2.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 5d98532a5d518c1ba99a39e0965faf5a69d8ad5bf82f7713684141895d3e8815 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 09:18:10,328 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 09:18:10,384 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 09:18:10,387 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 09:18:10,387 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 09:18:10,403 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 09:18:10,404 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 09:18:10,404 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 09:18:10,404 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 09:18:10,404 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 09:18:10,405 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 09:18:10,405 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 09:18:10,405 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 09:18:10,405 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 09:18:10,405 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 09:18:10,406 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 09:18:10,406 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 09:18:10,406 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 09:18:10,406 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 09:18:10,406 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 09:18:10,406 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 09:18:10,406 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 09:18:10,407 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 09:18:10,407 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 09:18:10,407 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 09:18:10,407 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 09:18:10,407 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 09:18:10,407 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 09:18:10,407 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 09:18:10,407 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 09:18:10,407 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 09:18:10,407 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 09:18:10,408 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:18:10,408 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 09:18:10,408 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 09:18:10,408 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 09:18:10,408 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 09:18:10,408 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 09:18:10,408 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 09:18:10,408 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 09:18:10,408 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 09:18:10,408 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 09:18:10,408 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 09:18:10,408 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 -> 5d98532a5d518c1ba99a39e0965faf5a69d8ad5bf82f7713684141895d3e8815 [2025-03-03 09:18:10,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 09:18:10,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 09:18:10,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 09:18:10,621 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 09:18:10,621 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 09:18:10,622 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_2.c [2025-03-03 09:18:11,726 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/796067122/c405d1405a9b4eec9cbb6105dc6cb2f4/FLAG5721d79fb [2025-03-03 09:18:11,915 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 09:18:11,916 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_2.c [2025-03-03 09:18:11,923 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/796067122/c405d1405a9b4eec9cbb6105dc6cb2f4/FLAG5721d79fb [2025-03-03 09:18:12,293 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/796067122/c405d1405a9b4eec9cbb6105dc6cb2f4 [2025-03-03 09:18:12,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 09:18:12,295 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 09:18:12,296 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 09:18:12,296 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 09:18:12,300 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 09:18:12,301 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:18:12" (1/1) ... [2025-03-03 09:18:12,301 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3867afc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:12, skipping insertion in model container [2025-03-03 09:18:12,302 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:18:12" (1/1) ... [2025-03-03 09:18:12,312 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 09:18:12,385 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_2.c[323,336] [2025-03-03 09:18:12,395 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:18:12,400 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 09:18:12,406 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_2.c[323,336] [2025-03-03 09:18:12,413 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:18:12,421 INFO L204 MainTranslator]: Completed translation [2025-03-03 09:18:12,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:12 WrapperNode [2025-03-03 09:18:12,421 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 09:18:12,422 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 09:18:12,422 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 09:18:12,422 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 09:18:12,426 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:12" (1/1) ... [2025-03-03 09:18:12,430 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:12" (1/1) ... [2025-03-03 09:18:12,440 INFO L138 Inliner]: procedures = 13, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2025-03-03 09:18:12,441 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 09:18:12,441 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 09:18:12,441 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 09:18:12,441 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 09:18:12,447 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:12" (1/1) ... [2025-03-03 09:18:12,447 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:12" (1/1) ... [2025-03-03 09:18:12,448 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:12" (1/1) ... [2025-03-03 09:18:12,465 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-03-03 09:18:12,466 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:12" (1/1) ... [2025-03-03 09:18:12,466 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:12" (1/1) ... [2025-03-03 09:18:12,471 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:12" (1/1) ... [2025-03-03 09:18:12,473 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:12" (1/1) ... [2025-03-03 09:18:12,473 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:12" (1/1) ... [2025-03-03 09:18:12,477 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:12" (1/1) ... [2025-03-03 09:18:12,478 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 09:18:12,479 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 09:18:12,479 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 09:18:12,479 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 09:18:12,479 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:12" (1/1) ... [2025-03-03 09:18:12,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:18:12,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:18:12,503 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-03 09:18:12,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-03 09:18:12,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 09:18:12,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 09:18:12,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-03 09:18:12,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-03 09:18:12,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-03 09:18:12,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-03 09:18:12,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 09:18:12,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 09:18:12,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-03 09:18:12,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-03 09:18:12,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-03 09:18:12,583 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 09:18:12,584 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 09:18:12,696 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L8: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset; [2025-03-03 09:18:12,706 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-03-03 09:18:12,706 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 09:18:12,715 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 09:18:12,716 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 09:18:12,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:18:12 BoogieIcfgContainer [2025-03-03 09:18:12,717 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 09:18:12,718 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 09:18:12,719 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 09:18:12,722 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 09:18:12,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 09:18:12" (1/3) ... [2025-03-03 09:18:12,723 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11a23a35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:18:12, skipping insertion in model container [2025-03-03 09:18:12,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:12" (2/3) ... [2025-03-03 09:18:12,724 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11a23a35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:18:12, skipping insertion in model container [2025-03-03 09:18:12,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:18:12" (3/3) ... [2025-03-03 09:18:12,725 INFO L128 eAbstractionObserver]: Analyzing ICFG partial_mod_count_2.c [2025-03-03 09:18:12,737 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 09:18:12,739 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG partial_mod_count_2.c that has 1 procedures, 15 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-03 09:18:12,772 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 09:18:12,783 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@10c2eeb6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 09:18:12,783 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 09:18:12,785 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:12,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-03 09:18:12,790 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:18:12,790 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:18:12,791 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:18:12,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:18:12,794 INFO L85 PathProgramCache]: Analyzing trace with hash 419935901, now seen corresponding path program 1 times [2025-03-03 09:18:12,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:18:12,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479294826] [2025-03-03 09:18:12,801 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:18:12,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:18:12,849 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-03 09:18:12,864 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-03 09:18:12,864 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:18:12,864 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:18:12,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:18:12,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479294826] [2025-03-03 09:18:12,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479294826] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:18:12,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:18:12,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-03 09:18:12,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625977293] [2025-03-03 09:18:12,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:18:12,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-03 09:18:12,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:18:12,994 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-03 09:18:12,995 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-03 09:18:12,996 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2025-03-03 09:18:13,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:18:13,042 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2025-03-03 09:18:13,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-03 09:18:13,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) Word has length 8 [2025-03-03 09:18:13,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:18:13,047 INFO L225 Difference]: With dead ends: 38 [2025-03-03 09:18:13,047 INFO L226 Difference]: Without dead ends: 22 [2025-03-03 09:18:13,049 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-03 09:18:13,051 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:18:13,051 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 14 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:18:13,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-03-03 09:18:13,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2025-03-03 09:18:13,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:13,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2025-03-03 09:18:13,070 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2025-03-03 09:18:13,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:18:13,070 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2025-03-03 09:18:13,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2025-03-03 09:18:13,070 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2025-03-03 09:18:13,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-03 09:18:13,070 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:18:13,070 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:18:13,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 09:18:13,071 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:18:13,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:18:13,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1813573396, now seen corresponding path program 1 times [2025-03-03 09:18:13,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:18:13,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219923764] [2025-03-03 09:18:13,072 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:18:13,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:18:13,081 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-03 09:18:13,095 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-03 09:18:13,095 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:18:13,095 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:18:13,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:18:13,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219923764] [2025-03-03 09:18:13,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219923764] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:18:13,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542782854] [2025-03-03 09:18:13,190 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:18:13,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:18:13,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:18:13,193 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:18:13,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 09:18:13,231 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-03 09:18:13,247 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-03 09:18:13,247 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:18:13,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:13,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-03 09:18:13,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:18:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:18:13,315 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:18:13,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:18:13,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542782854] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:18:13,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:18:13,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-03-03 09:18:13,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148485330] [2025-03-03 09:18:13,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:18:13,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 09:18:13,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:18:13,348 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 09:18:13,348 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2025-03-03 09:18:13,348 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:13,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:18:13,428 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2025-03-03 09:18:13,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 09:18:13,428 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-03-03 09:18:13,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:18:13,429 INFO L225 Difference]: With dead ends: 54 [2025-03-03 09:18:13,429 INFO L226 Difference]: Without dead ends: 44 [2025-03-03 09:18:13,430 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2025-03-03 09:18:13,430 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 105 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:18:13,431 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 31 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:18:13,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-03-03 09:18:13,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 22. [2025-03-03 09:18:13,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:13,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2025-03-03 09:18:13,438 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 11 [2025-03-03 09:18:13,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:18:13,438 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2025-03-03 09:18:13,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:13,438 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2025-03-03 09:18:13,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-03 09:18:13,438 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:18:13,438 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:18:13,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-03 09:18:13,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:18:13,640 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:18:13,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:18:13,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1506026750, now seen corresponding path program 1 times [2025-03-03 09:18:13,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:18:13,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844518942] [2025-03-03 09:18:13,641 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:18:13,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:18:13,649 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-03 09:18:13,665 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-03 09:18:13,665 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:18:13,665 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:13,891 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-03 09:18:13,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:18:13,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844518942] [2025-03-03 09:18:13,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844518942] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:18:13,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:18:13,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 09:18:13,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113860888] [2025-03-03 09:18:13,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:18:13,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-03 09:18:13,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:18:13,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-03 09:18:13,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 09:18:13,893 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:13,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:18:13,951 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2025-03-03 09:18:13,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 09:18:13,952 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2025-03-03 09:18:13,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:18:13,952 INFO L225 Difference]: With dead ends: 34 [2025-03-03 09:18:13,952 INFO L226 Difference]: Without dead ends: 32 [2025-03-03 09:18:13,952 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2025-03-03 09:18:13,953 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:18:13,953 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 18 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:18:13,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-03-03 09:18:13,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2025-03-03 09:18:13,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:13,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2025-03-03 09:18:13,959 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 20 [2025-03-03 09:18:13,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:18:13,959 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2025-03-03 09:18:13,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:13,960 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2025-03-03 09:18:13,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-03 09:18:13,960 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:18:13,960 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:18:13,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-03 09:18:13,961 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:18:13,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:18:13,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1925946415, now seen corresponding path program 1 times [2025-03-03 09:18:13,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:18:13,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357525385] [2025-03-03 09:18:13,961 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:18:13,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:18:13,971 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-03 09:18:13,984 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 09:18:13,984 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:18:13,984 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 09:18:14,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:18:14,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357525385] [2025-03-03 09:18:14,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357525385] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:18:14,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732917782] [2025-03-03 09:18:14,212 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:18:14,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:18:14,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:18:14,214 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:18:14,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 09:18:14,244 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-03 09:18:14,260 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 09:18:14,260 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:18:14,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:14,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 09:18:14,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:18:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 09:18:14,366 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:18:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 09:18:14,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732917782] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:18:14,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:18:14,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2025-03-03 09:18:14,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594459622] [2025-03-03 09:18:14,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:18:14,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 09:18:14,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:18:14,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 09:18:14,458 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2025-03-03 09:18:14,458 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:14,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:18:14,630 INFO L93 Difference]: Finished difference Result 219 states and 264 transitions. [2025-03-03 09:18:14,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 09:18:14,631 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-03-03 09:18:14,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:18:14,632 INFO L225 Difference]: With dead ends: 219 [2025-03-03 09:18:14,633 INFO L226 Difference]: Without dead ends: 197 [2025-03-03 09:18:14,633 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=315, Unknown=0, NotChecked=0, Total=506 [2025-03-03 09:18:14,633 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 269 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:18:14,634 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 61 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:18:14,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2025-03-03 09:18:14,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 50. [2025-03-03 09:18:14,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 49 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:14,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2025-03-03 09:18:14,643 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 25 [2025-03-03 09:18:14,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:18:14,643 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2025-03-03 09:18:14,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:14,643 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2025-03-03 09:18:14,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-03 09:18:14,644 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:18:14,644 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:18:14,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-03 09:18:14,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-03 09:18:14,844 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:18:14,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:18:14,845 INFO L85 PathProgramCache]: Analyzing trace with hash -703059696, now seen corresponding path program 2 times [2025-03-03 09:18:14,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:18:14,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878221737] [2025-03-03 09:18:14,845 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:18:14,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:18:14,862 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-03 09:18:14,877 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-03 09:18:14,877 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:18:14,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2025-03-03 09:18:15,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:18:15,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878221737] [2025-03-03 09:18:15,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878221737] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:18:15,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535844705] [2025-03-03 09:18:15,200 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:18:15,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:18:15,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:18:15,203 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:18:15,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 09:18:15,242 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-03 09:18:15,263 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-03 09:18:15,263 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:18:15,263 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:15,268 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-03 09:18:15,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:18:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 09:18:15,535 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:18:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 09:18:15,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535844705] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:18:15,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:18:15,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 13] total 29 [2025-03-03 09:18:15,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918972821] [2025-03-03 09:18:15,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:18:15,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-03 09:18:15,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:18:15,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-03 09:18:15,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2025-03-03 09:18:15,730 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:18,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:18:18,778 INFO L93 Difference]: Finished difference Result 574 states and 713 transitions. [2025-03-03 09:18:18,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2025-03-03 09:18:18,779 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2025-03-03 09:18:18,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:18:18,781 INFO L225 Difference]: With dead ends: 574 [2025-03-03 09:18:18,781 INFO L226 Difference]: Without dead ends: 543 [2025-03-03 09:18:18,789 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13191 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=8379, Invalid=20691, Unknown=0, NotChecked=0, Total=29070 [2025-03-03 09:18:18,790 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 755 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-03 09:18:18,790 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [755 Valid, 179 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-03 09:18:18,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2025-03-03 09:18:18,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 91. [2025-03-03 09:18:18,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 90 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) [2025-03-03 09:18:18,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2025-03-03 09:18:18,804 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 43 [2025-03-03 09:18:18,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:18:18,804 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2025-03-03 09:18:18,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:18,804 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2025-03-03 09:18:18,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2025-03-03 09:18:18,805 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:18:18,805 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 12, 10, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2025-03-03 09:18:18,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-03 09:18:19,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:18:19,006 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:18:19,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:18:19,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1130247741, now seen corresponding path program 3 times [2025-03-03 09:18:19,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:18:19,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379487622] [2025-03-03 09:18:19,006 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:18:19,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:18:19,021 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 84 statements into 23 equivalence classes. [2025-03-03 09:18:19,043 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 24 of 84 statements. [2025-03-03 09:18:19,045 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 09:18:19,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:19,292 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2025-03-03 09:18:19,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:18:19,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379487622] [2025-03-03 09:18:19,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379487622] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:18:19,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458446345] [2025-03-03 09:18:19,292 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:18:19,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:18:19,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:18:19,294 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:18:19,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 09:18:19,345 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 84 statements into 23 equivalence classes. [2025-03-03 09:18:19,388 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 24 of 84 statements. [2025-03-03 09:18:19,388 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 09:18:19,388 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:19,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-03 09:18:19,394 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:18:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2025-03-03 09:18:19,600 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:18:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2025-03-03 09:18:20,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458446345] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:18:20,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:18:20,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2025-03-03 09:18:20,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619223863] [2025-03-03 09:18:20,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:18:20,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-03 09:18:20,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:18:20,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-03 09:18:20,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2025-03-03 09:18:20,424 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:20,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:18:20,598 INFO L93 Difference]: Finished difference Result 118 states and 143 transitions. [2025-03-03 09:18:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 09:18:20,599 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2025-03-03 09:18:20,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:18:20,600 INFO L225 Difference]: With dead ends: 118 [2025-03-03 09:18:20,600 INFO L226 Difference]: Without dead ends: 116 [2025-03-03 09:18:20,600 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=644, Unknown=0, NotChecked=0, Total=992 [2025-03-03 09:18:20,601 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 107 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:18:20,601 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 46 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:18:20,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2025-03-03 09:18:20,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2025-03-03 09:18:20,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.191304347826087) internal successors, (137), 115 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:20,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 137 transitions. [2025-03-03 09:18:20,611 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 137 transitions. Word has length 84 [2025-03-03 09:18:20,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:18:20,611 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 137 transitions. [2025-03-03 09:18:20,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:20,611 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 137 transitions. [2025-03-03 09:18:20,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2025-03-03 09:18:20,613 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:18:20,613 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 12, 10, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2025-03-03 09:18:20,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-03 09:18:20,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:18:20,814 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:18:20,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:18:20,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1772911984, now seen corresponding path program 4 times [2025-03-03 09:18:20,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:18:20,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613726200] [2025-03-03 09:18:20,814 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:18:20,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:18:20,838 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 109 statements into 2 equivalence classes. [2025-03-03 09:18:21,019 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 109 of 109 statements. [2025-03-03 09:18:21,020 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:18:21,020 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 133 proven. 550 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2025-03-03 09:18:21,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:18:21,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613726200] [2025-03-03 09:18:21,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613726200] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:18:21,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406433002] [2025-03-03 09:18:21,802 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:18:21,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:18:21,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:18:21,806 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:18:21,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 09:18:21,861 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 109 statements into 2 equivalence classes. [2025-03-03 09:18:22,137 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 109 of 109 statements. [2025-03-03 09:18:22,137 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:18:22,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:22,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-03 09:18:22,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:18:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2025-03-03 09:18:22,641 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:18:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2025-03-03 09:18:23,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406433002] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:18:23,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:18:23,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 25] total 70 [2025-03-03 09:18:23,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937469537] [2025-03-03 09:18:23,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:18:23,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2025-03-03 09:18:23,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:18:23,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2025-03-03 09:18:23,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1615, Invalid=3355, Unknown=0, NotChecked=0, Total=4970 [2025-03-03 09:18:23,221 INFO L87 Difference]: Start difference. First operand 116 states and 137 transitions. Second operand has 71 states, 71 states have (on average 3.0985915492957745) internal successors, (220), 70 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:24,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:18:24,870 INFO L93 Difference]: Finished difference Result 2850 states and 3438 transitions. [2025-03-03 09:18:24,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2025-03-03 09:18:24,870 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.0985915492957745) internal successors, (220), 70 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2025-03-03 09:18:24,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:18:24,877 INFO L225 Difference]: With dead ends: 2850 [2025-03-03 09:18:24,877 INFO L226 Difference]: Without dead ends: 2771 [2025-03-03 09:18:24,880 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3726 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3820, Invalid=7310, Unknown=0, NotChecked=0, Total=11130 [2025-03-03 09:18:24,880 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 2302 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2302 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 09:18:24,881 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2302 Valid, 297 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 09:18:24,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2025-03-03 09:18:24,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 224. [2025-03-03 09:18:24,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.2062780269058295) internal successors, (269), 223 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:24,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 269 transitions. [2025-03-03 09:18:24,914 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 269 transitions. Word has length 109 [2025-03-03 09:18:24,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:18:24,914 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 269 transitions. [2025-03-03 09:18:24,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.0985915492957745) internal successors, (220), 70 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:24,915 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 269 transitions. [2025-03-03 09:18:24,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2025-03-03 09:18:24,918 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:18:24,918 INFO L218 NwaCegarLoop]: trace histogram [58, 58, 34, 24, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2025-03-03 09:18:24,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-03 09:18:25,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:18:25,118 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:18:25,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:18:25,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1303212240, now seen corresponding path program 5 times [2025-03-03 09:18:25,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:18:25,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551181854] [2025-03-03 09:18:25,119 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:18:25,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:18:25,143 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 217 statements into 59 equivalence classes. [2025-03-03 09:18:28,283 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 59 check-sat command(s) and asserted 217 of 217 statements. [2025-03-03 09:18:28,283 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 59 check-sat command(s) [2025-03-03 09:18:28,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5150 backedges. 1724 proven. 3293 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2025-03-03 09:18:31,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:18:31,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551181854] [2025-03-03 09:18:31,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551181854] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:18:31,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927020686] [2025-03-03 09:18:31,608 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:18:31,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:18:31,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:18:31,610 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:18:31,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 09:18:31,689 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 217 statements into 59 equivalence classes.