./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-12.i -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 aa3ed2bff1e00689dc57bff3bbe0e8e59870786f79090b55555fbd2dfd8e804d --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 15:18:37,535 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 15:18:37,594 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 15:18:37,601 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 15:18:37,601 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 15:18:37,624 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 15:18:37,626 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 15:18:37,626 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 15:18:37,626 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 15:18:37,627 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 15:18:37,627 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 15:18:37,627 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 15:18:37,627 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 15:18:37,627 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 15:18:37,628 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 15:18:37,628 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 15:18:37,628 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 15:18:37,628 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 15:18:37,628 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 15:18:37,628 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 15:18:37,628 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 15:18:37,628 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 15:18:37,628 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 15:18:37,628 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 15:18:37,628 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 15:18:37,628 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 15:18:37,628 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 15:18:37,628 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 15:18:37,629 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 15:18:37,629 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 15:18:37,629 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 15:18:37,629 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 15:18:37,629 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 15:18:37,629 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 15:18:37,629 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 15:18:37,629 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 15:18:37,629 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 15:18:37,629 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 15:18:37,629 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 15:18:37,629 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 15:18:37,629 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 15:18:37,629 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 15:18:37,629 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 15:18:37,630 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 -> aa3ed2bff1e00689dc57bff3bbe0e8e59870786f79090b55555fbd2dfd8e804d [2025-03-08 15:18:37,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 15:18:37,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 15:18:37,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 15:18:37,856 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 15:18:37,856 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 15:18:37,857 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-12.i [2025-03-08 15:18:38,983 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5414a4d5c/09c4627b7d884838b88004de253b2111/FLAGe8d4ea711 [2025-03-08 15:18:39,214 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 15:18:39,215 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-12.i [2025-03-08 15:18:39,224 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5414a4d5c/09c4627b7d884838b88004de253b2111/FLAGe8d4ea711 [2025-03-08 15:18:39,550 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5414a4d5c/09c4627b7d884838b88004de253b2111 [2025-03-08 15:18:39,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 15:18:39,553 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 15:18:39,554 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 15:18:39,554 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 15:18:39,557 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 15:18:39,557 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 03:18:39" (1/1) ... [2025-03-08 15:18:39,558 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f13129e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:18:39, skipping insertion in model container [2025-03-08 15:18:39,558 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 03:18:39" (1/1) ... [2025-03-08 15:18:39,584 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 15:18:39,684 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/hardness-nfm22/hardness_operatoramount_amount250_file-12.i[916,929] [2025-03-08 15:18:39,835 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 15:18:39,846 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 15:18:39,856 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/hardness-nfm22/hardness_operatoramount_amount250_file-12.i[916,929] [2025-03-08 15:18:39,912 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 15:18:39,932 INFO L204 MainTranslator]: Completed translation [2025-03-08 15:18:39,933 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:18:39 WrapperNode [2025-03-08 15:18:39,933 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 15:18:39,934 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 15:18:39,934 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 15:18:39,934 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 15:18:39,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:18:39" (1/1) ... [2025-03-08 15:18:39,949 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:18:39" (1/1) ... [2025-03-08 15:18:39,993 INFO L138 Inliner]: procedures = 26, calls = 62, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 463 [2025-03-08 15:18:39,994 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 15:18:39,994 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 15:18:39,994 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 15:18:39,994 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 15:18:40,000 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:18:39" (1/1) ... [2025-03-08 15:18:40,001 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:18:39" (1/1) ... [2025-03-08 15:18:40,013 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:18:39" (1/1) ... [2025-03-08 15:18:40,049 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-08 15:18:40,050 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:18:39" (1/1) ... [2025-03-08 15:18:40,050 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:18:39" (1/1) ... [2025-03-08 15:18:40,071 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:18:39" (1/1) ... [2025-03-08 15:18:40,077 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:18:39" (1/1) ... [2025-03-08 15:18:40,086 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:18:39" (1/1) ... [2025-03-08 15:18:40,091 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:18:39" (1/1) ... [2025-03-08 15:18:40,097 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 15:18:40,099 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 15:18:40,099 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 15:18:40,099 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 15:18:40,100 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:18:39" (1/1) ... [2025-03-08 15:18:40,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 15:18:40,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 15:18:40,126 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 15:18:40,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 15:18:40,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 15:18:40,147 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-08 15:18:40,147 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-08 15:18:40,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 15:18:40,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 15:18:40,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 15:18:40,241 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 15:18:40,243 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 15:18:40,846 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L351: havoc property_#t~ite43#1;havoc property_#t~ite42#1;havoc property_#t~bitwise39#1;havoc property_#t~ite41#1;havoc property_#t~bitwise40#1;havoc property_#t~short44#1;havoc property_#t~ite49#1;havoc property_#t~ite48#1;havoc property_#t~bitwise45#1;havoc property_#t~ite47#1;havoc property_#t~bitwise46#1;havoc property_#t~short50#1; [2025-03-08 15:18:40,902 INFO L? ?]: Removed 71 outVars from TransFormulas that were not future-live. [2025-03-08 15:18:40,903 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 15:18:40,925 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 15:18:40,925 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 15:18:40,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 03:18:40 BoogieIcfgContainer [2025-03-08 15:18:40,926 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 15:18:40,947 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 15:18:40,947 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 15:18:40,950 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 15:18:40,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 03:18:39" (1/3) ... [2025-03-08 15:18:40,954 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c667844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 03:18:40, skipping insertion in model container [2025-03-08 15:18:40,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:18:39" (2/3) ... [2025-03-08 15:18:40,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c667844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 03:18:40, skipping insertion in model container [2025-03-08 15:18:40,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 03:18:40" (3/3) ... [2025-03-08 15:18:40,956 INFO L128 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-12.i [2025-03-08 15:18:40,969 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 15:18:40,972 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG hardness_operatoramount_amount250_file-12.i that has 2 procedures, 187 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-03-08 15:18:41,026 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 15:18:41,036 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;@272bcc3e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 15:18:41,036 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 15:18:41,040 INFO L276 IsEmpty]: Start isEmpty. Operand has 187 states, 135 states have (on average 1.4666666666666666) internal successors, (198), 136 states have internal predecessors, (198), 49 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2025-03-08 15:18:41,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2025-03-08 15:18:41,055 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 15:18:41,056 INFO L218 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 15:18:41,056 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 15:18:41,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 15:18:41,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1948502216, now seen corresponding path program 1 times [2025-03-08 15:18:41,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 15:18:41,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15230824] [2025-03-08 15:18:41,065 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:18:41,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 15:18:41,155 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 317 statements into 1 equivalence classes. [2025-03-08 15:18:41,584 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 317 of 317 statements. [2025-03-08 15:18:41,585 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:18:41,585 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:18:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2025-03-08 15:18:42,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 15:18:42,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15230824] [2025-03-08 15:18:42,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15230824] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 15:18:42,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 15:18:42,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 15:18:42,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233755638] [2025-03-08 15:18:42,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 15:18:42,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 15:18:42,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 15:18:42,508 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 15:18:42,508 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 15:18:42,510 INFO L87 Difference]: Start difference. First operand has 187 states, 135 states have (on average 1.4666666666666666) internal successors, (198), 136 states have internal predecessors, (198), 49 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2025-03-08 15:18:42,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 15:18:42,820 INFO L93 Difference]: Finished difference Result 513 states and 920 transitions. [2025-03-08 15:18:42,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 15:18:42,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 317 [2025-03-08 15:18:42,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 15:18:42,834 INFO L225 Difference]: With dead ends: 513 [2025-03-08 15:18:42,834 INFO L226 Difference]: Without dead ends: 329 [2025-03-08 15:18:42,840 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 15:18:42,843 INFO L435 NwaCegarLoop]: 251 mSDtfsCounter, 171 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 15:18:42,844 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 643 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 15:18:42,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2025-03-08 15:18:42,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 326. [2025-03-08 15:18:42,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 225 states have (on average 1.4177777777777778) internal successors, (319), 225 states have internal predecessors, (319), 98 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2025-03-08 15:18:42,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 515 transitions. [2025-03-08 15:18:42,936 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 515 transitions. Word has length 317 [2025-03-08 15:18:42,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 15:18:42,937 INFO L471 AbstractCegarLoop]: Abstraction has 326 states and 515 transitions. [2025-03-08 15:18:42,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2025-03-08 15:18:42,937 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 515 transitions. [2025-03-08 15:18:42,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2025-03-08 15:18:42,941 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 15:18:42,941 INFO L218 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 15:18:42,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 15:18:42,942 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 15:18:42,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 15:18:42,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1320973081, now seen corresponding path program 1 times [2025-03-08 15:18:42,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 15:18:42,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711128822] [2025-03-08 15:18:42,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:18:42,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 15:18:42,978 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 317 statements into 1 equivalence classes. [2025-03-08 15:18:43,161 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 317 of 317 statements. [2025-03-08 15:18:43,162 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:18:43,162 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:18:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2025-03-08 15:18:43,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 15:18:43,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711128822] [2025-03-08 15:18:43,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711128822] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 15:18:43,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 15:18:43,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 15:18:43,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197841752] [2025-03-08 15:18:43,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 15:18:43,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 15:18:44,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 15:18:44,001 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 15:18:44,002 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-03-08 15:18:44,002 INFO L87 Difference]: Start difference. First operand 326 states and 515 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2025-03-08 15:18:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 15:18:44,314 INFO L93 Difference]: Finished difference Result 1011 states and 1577 transitions. [2025-03-08 15:18:44,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 15:18:44,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 317 [2025-03-08 15:18:44,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 15:18:44,320 INFO L225 Difference]: With dead ends: 1011 [2025-03-08 15:18:44,322 INFO L226 Difference]: Without dead ends: 688 [2025-03-08 15:18:44,324 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-03-08 15:18:44,326 INFO L435 NwaCegarLoop]: 283 mSDtfsCounter, 254 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 15:18:44,326 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 799 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 15:18:44,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2025-03-08 15:18:44,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 554. [2025-03-08 15:18:44,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 419 states have (on average 1.4439140811455846) internal successors, (605), 421 states have internal predecessors, (605), 130 states have call successors, (130), 4 states have call predecessors, (130), 4 states have return successors, (130), 128 states have call predecessors, (130), 130 states have call successors, (130) [2025-03-08 15:18:44,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 865 transitions. [2025-03-08 15:18:44,382 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 865 transitions. Word has length 317 [2025-03-08 15:18:44,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 15:18:44,383 INFO L471 AbstractCegarLoop]: Abstraction has 554 states and 865 transitions. [2025-03-08 15:18:44,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2025-03-08 15:18:44,383 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 865 transitions. [2025-03-08 15:18:44,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2025-03-08 15:18:44,389 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 15:18:44,389 INFO L218 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 15:18:44,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 15:18:44,389 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 15:18:44,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 15:18:44,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1258900936, now seen corresponding path program 1 times [2025-03-08 15:18:44,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 15:18:44,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517652844] [2025-03-08 15:18:44,393 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:18:44,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 15:18:44,417 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 317 statements into 1 equivalence classes. [2025-03-08 15:18:44,821 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 317 of 317 statements. [2025-03-08 15:18:44,821 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:18:44,821 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:18:45,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 27 proven. 117 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2025-03-08 15:18:45,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 15:18:45,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517652844] [2025-03-08 15:18:45,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517652844] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 15:18:45,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490915474] [2025-03-08 15:18:45,352 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:18:45,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 15:18:45,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 15:18:45,356 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 15:18:45,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 15:18:45,484 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 317 statements into 1 equivalence classes. [2025-03-08 15:18:45,589 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 317 of 317 statements. [2025-03-08 15:18:45,589 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:18:45,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:18:45,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-08 15:18:45,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 15:18:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2128 proven. 96 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2025-03-08 15:18:45,989 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 15:18:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 48 proven. 96 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2025-03-08 15:18:46,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490915474] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 15:18:46,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 15:18:46,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 14 [2025-03-08 15:18:46,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330453635] [2025-03-08 15:18:46,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 15:18:46,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 15:18:46,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 15:18:46,422 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 15:18:46,422 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2025-03-08 15:18:46,423 INFO L87 Difference]: Start difference. First operand 554 states and 865 transitions. Second operand has 14 states, 14 states have (on average 9.928571428571429) internal successors, (139), 14 states have internal predecessors, (139), 4 states have call successors, (130), 2 states have call predecessors, (130), 4 states have return successors, (131), 4 states have call predecessors, (131), 4 states have call successors, (131) [2025-03-08 15:18:48,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 15:18:48,417 INFO L93 Difference]: Finished difference Result 1512 states and 2337 transitions. [2025-03-08 15:18:48,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-03-08 15:18:48,418 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.928571428571429) internal successors, (139), 14 states have internal predecessors, (139), 4 states have call successors, (130), 2 states have call predecessors, (130), 4 states have return successors, (131), 4 states have call predecessors, (131), 4 states have call successors, (131) Word has length 317 [2025-03-08 15:18:48,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 15:18:48,429 INFO L225 Difference]: With dead ends: 1512 [2025-03-08 15:18:48,429 INFO L226 Difference]: Without dead ends: 961 [2025-03-08 15:18:48,432 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 681 GetRequests, 632 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=1922, Unknown=0, NotChecked=0, Total=2450 [2025-03-08 15:18:48,434 INFO L435 NwaCegarLoop]: 218 mSDtfsCounter, 1758 mSDsluCounter, 2082 mSDsCounter, 0 mSdLazyCounter, 1523 mSolverCounterSat, 644 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1776 SdHoareTripleChecker+Valid, 2300 SdHoareTripleChecker+Invalid, 2167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 644 IncrementalHoareTripleChecker+Valid, 1523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-03-08 15:18:48,434 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1776 Valid, 2300 Invalid, 2167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [644 Valid, 1523 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-03-08 15:18:48,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2025-03-08 15:18:48,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 685. [2025-03-08 15:18:48,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 512 states have (on average 1.4140625) internal successors, (724), 513 states have internal predecessors, (724), 163 states have call successors, (163), 9 states have call predecessors, (163), 9 states have return successors, (163), 162 states have call predecessors, (163), 163 states have call successors, (163) [2025-03-08 15:18:48,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1050 transitions. [2025-03-08 15:18:48,525 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1050 transitions. Word has length 317 [2025-03-08 15:18:48,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 15:18:48,525 INFO L471 AbstractCegarLoop]: Abstraction has 685 states and 1050 transitions. [2025-03-08 15:18:48,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.928571428571429) internal successors, (139), 14 states have internal predecessors, (139), 4 states have call successors, (130), 2 states have call predecessors, (130), 4 states have return successors, (131), 4 states have call predecessors, (131), 4 states have call successors, (131) [2025-03-08 15:18:48,526 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1050 transitions. [2025-03-08 15:18:48,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2025-03-08 15:18:48,529 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 15:18:48,530 INFO L218 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 15:18:48,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 15:18:48,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 15:18:48,730 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 15:18:48,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 15:18:48,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1047648201, now seen corresponding path program 1 times [2025-03-08 15:18:48,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 15:18:48,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620141196] [2025-03-08 15:18:48,732 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:18:48,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 15:18:48,758 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 319 statements into 1 equivalence classes. [2025-03-08 15:18:48,784 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 319 of 319 statements. [2025-03-08 15:18:48,784 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:18:48,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:18:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2025-03-08 15:18:48,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 15:18:48,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620141196] [2025-03-08 15:18:48,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620141196] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 15:18:48,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 15:18:48,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 15:18:48,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400728747] [2025-03-08 15:18:48,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 15:18:48,977 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 15:18:48,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 15:18:48,978 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 15:18:48,978 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-08 15:18:48,978 INFO L87 Difference]: Start difference. First operand 685 states and 1050 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 2 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2025-03-08 15:18:49,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 15:18:49,302 INFO L93 Difference]: Finished difference Result 2020 states and 3116 transitions. [2025-03-08 15:18:49,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 15:18:49,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 2 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) Word has length 319 [2025-03-08 15:18:49,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 15:18:49,312 INFO L225 Difference]: With dead ends: 2020 [2025-03-08 15:18:49,312 INFO L226 Difference]: Without dead ends: 1449 [2025-03-08 15:18:49,315 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2025-03-08 15:18:49,317 INFO L435 NwaCegarLoop]: 377 mSDtfsCounter, 376 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 1409 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 15:18:49,317 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 1409 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 15:18:49,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2025-03-08 15:18:49,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1183. [2025-03-08 15:18:49,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 891 states have (on average 1.4197530864197532) internal successors, (1265), 893 states have internal predecessors, (1265), 277 states have call successors, (277), 14 states have call predecessors, (277), 14 states have return successors, (277), 275 states have call predecessors, (277), 277 states have call successors, (277) [2025-03-08 15:18:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1819 transitions. [2025-03-08 15:18:49,428 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1819 transitions. Word has length 319 [2025-03-08 15:18:49,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 15:18:49,428 INFO L471 AbstractCegarLoop]: Abstraction has 1183 states and 1819 transitions. [2025-03-08 15:18:49,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 2 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2025-03-08 15:18:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1819 transitions. [2025-03-08 15:18:49,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2025-03-08 15:18:49,431 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 15:18:49,432 INFO L218 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 15:18:49,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 15:18:49,432 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 15:18:49,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 15:18:49,432 INFO L85 PathProgramCache]: Analyzing trace with hash 717882440, now seen corresponding path program 1 times [2025-03-08 15:18:49,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 15:18:49,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634819548] [2025-03-08 15:18:49,433 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:18:49,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 15:18:49,451 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 319 statements into 1 equivalence classes. [2025-03-08 15:18:49,704 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 319 of 319 statements. [2025-03-08 15:18:49,704 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:18:49,704 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:18:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 48 proven. 96 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2025-03-08 15:18:50,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 15:18:50,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634819548] [2025-03-08 15:18:50,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634819548] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 15:18:50,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050710830] [2025-03-08 15:18:50,042 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:18:50,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 15:18:50,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 15:18:50,046 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 15:18:50,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 15:18:50,143 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 319 statements into 1 equivalence classes. [2025-03-08 15:18:50,244 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 319 of 319 statements. [2025-03-08 15:18:50,244 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:18:50,244 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:18:50,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-08 15:18:50,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 15:18:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2162 proven. 186 refuted. 0 times theorem prover too weak. 2356 trivial. 0 not checked. [2025-03-08 15:18:50,609 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 15:18:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 48 proven. 96 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2025-03-08 15:18:50,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050710830] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 15:18:50,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 15:18:50,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 6] total 13 [2025-03-08 15:18:50,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287388569] [2025-03-08 15:18:50,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 15:18:50,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 15:18:50,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 15:18:50,902 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 15:18:50,902 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2025-03-08 15:18:50,903 INFO L87 Difference]: Start difference. First operand 1183 states and 1819 transitions. Second operand has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 3 states have call successors, (81), 3 states have call predecessors, (81), 5 states have return successors, (82), 3 states have call predecessors, (82), 3 states have call successors, (82) [2025-03-08 15:18:51,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 15:18:51,304 INFO L93 Difference]: Finished difference Result 2173 states and 3323 transitions. [2025-03-08 15:18:51,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 15:18:51,305 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 3 states have call successors, (81), 3 states have call predecessors, (81), 5 states have return successors, (82), 3 states have call predecessors, (82), 3 states have call successors, (82) Word has length 319 [2025-03-08 15:18:51,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 15:18:51,312 INFO L225 Difference]: With dead ends: 2173 [2025-03-08 15:18:51,314 INFO L226 Difference]: Without dead ends: 1221 [2025-03-08 15:18:51,316 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 629 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2025-03-08 15:18:51,318 INFO L435 NwaCegarLoop]: 200 mSDtfsCounter, 370 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 15:18:51,319 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 1045 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 15:18:51,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2025-03-08 15:18:51,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1203. [2025-03-08 15:18:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 906 states have (on average 1.4061810154525387) internal successors, (1274), 908 states have internal predecessors, (1274), 277 states have call successors, (277), 19 states have call predecessors, (277), 19 states have return successors, (277), 275 states have call predecessors, (277), 277 states have call successors, (277) [2025-03-08 15:18:51,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1828 transitions. [2025-03-08 15:18:51,390 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1828 transitions. Word has length 319 [2025-03-08 15:18:51,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 15:18:51,390 INFO L471 AbstractCegarLoop]: Abstraction has 1203 states and 1828 transitions. [2025-03-08 15:18:51,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 3 states have call successors, (81), 3 states have call predecessors, (81), 5 states have return successors, (82), 3 states have call predecessors, (82), 3 states have call successors, (82) [2025-03-08 15:18:51,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1828 transitions. [2025-03-08 15:18:51,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2025-03-08 15:18:51,393 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 15:18:51,393 INFO L218 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 15:18:51,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 15:18:51,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 15:18:51,598 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 15:18:51,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 15:18:51,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1297250605, now seen corresponding path program 1 times [2025-03-08 15:18:51,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 15:18:51,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40162450] [2025-03-08 15:18:51,599 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:18:51,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 15:18:51,617 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 320 statements into 1 equivalence classes. [2025-03-08 15:18:51,877 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 320 of 320 statements. [2025-03-08 15:18:51,878 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:18:51,878 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:18:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2025-03-08 15:18:52,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 15:18:52,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40162450] [2025-03-08 15:18:52,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40162450] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 15:18:52,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271130420] [2025-03-08 15:18:52,182 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:18:52,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 15:18:52,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 15:18:52,184 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 15:18:52,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 15:18:52,277 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 320 statements into 1 equivalence classes. [2025-03-08 15:18:52,405 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 320 of 320 statements. [2025-03-08 15:18:52,405 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:18:52,405 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:18:52,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-08 15:18:52,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 15:18:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 3106 proven. 405 refuted. 0 times theorem prover too weak. 1193 trivial. 0 not checked. [2025-03-08 15:18:54,718 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 15:18:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 402 proven. 288 refuted. 0 times theorem prover too weak. 4014 trivial. 0 not checked. [2025-03-08 15:18:55,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271130420] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 15:18:55,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 15:18:55,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 26, 19] total 46 [2025-03-08 15:18:55,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650913051] [2025-03-08 15:18:55,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 15:18:55,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-03-08 15:18:55,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 15:18:55,684 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-03-08 15:18:55,684 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=1484, Unknown=0, NotChecked=0, Total=2070 [2025-03-08 15:18:55,684 INFO L87 Difference]: Start difference. First operand 1203 states and 1828 transitions. Second operand has 46 states, 44 states have (on average 4.818181818181818) internal successors, (212), 41 states have internal predecessors, (212), 14 states have call successors, (110), 8 states have call predecessors, (110), 15 states have return successors, (112), 14 states have call predecessors, (112), 14 states have call successors, (112) [2025-03-08 15:18:58,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 15:18:58,467 INFO L93 Difference]: Finished difference Result 3715 states and 5351 transitions. [2025-03-08 15:18:58,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2025-03-08 15:18:58,468 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 4.818181818181818) internal successors, (212), 41 states have internal predecessors, (212), 14 states have call successors, (110), 8 states have call predecessors, (110), 15 states have return successors, (112), 14 states have call predecessors, (112), 14 states have call successors, (112) Word has length 320 [2025-03-08 15:18:58,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 15:18:58,484 INFO L225 Difference]: With dead ends: 3715 [2025-03-08 15:18:58,484 INFO L226 Difference]: Without dead ends: 3207 [2025-03-08 15:18:58,488 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 609 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3042 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2553, Invalid=7953, Unknown=0, NotChecked=0, Total=10506 [2025-03-08 15:18:58,489 INFO L435 NwaCegarLoop]: 317 mSDtfsCounter, 1088 mSDsluCounter, 2091 mSDsCounter, 0 mSdLazyCounter, 2588 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 2408 SdHoareTripleChecker+Invalid, 3151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 2588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-03-08 15:18:58,490 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1115 Valid, 2408 Invalid, 3151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 2588 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-03-08 15:18:58,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2025-03-08 15:18:58,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 1669. [2025-03-08 15:18:58,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1271 states have (on average 1.3556254917387884) internal successors, (1723), 1275 states have internal predecessors, (1723), 329 states have call successors, (329), 68 states have call predecessors, (329), 68 states have return successors, (329), 325 states have call predecessors, (329), 329 states have call successors, (329) [2025-03-08 15:18:58,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 2381 transitions. [2025-03-08 15:18:58,620 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 2381 transitions. Word has length 320 [2025-03-08 15:18:58,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 15:18:58,620 INFO L471 AbstractCegarLoop]: Abstraction has 1669 states and 2381 transitions. [2025-03-08 15:18:58,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 4.818181818181818) internal successors, (212), 41 states have internal predecessors, (212), 14 states have call successors, (110), 8 states have call predecessors, (110), 15 states have return successors, (112), 14 states have call predecessors, (112), 14 states have call successors, (112) [2025-03-08 15:18:58,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 2381 transitions. [2025-03-08 15:18:58,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2025-03-08 15:18:58,624 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 15:18:58,624 INFO L218 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 15:18:58,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 15:18:58,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 15:18:58,824 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 15:18:58,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 15:18:58,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1774435650, now seen corresponding path program 1 times [2025-03-08 15:18:58,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 15:18:58,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174574546] [2025-03-08 15:18:58,825 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:18:58,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 15:18:58,843 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 321 statements into 1 equivalence classes. [2025-03-08 15:18:59,201 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 321 of 321 statements. [2025-03-08 15:18:59,202 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:18:59,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:19:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 417 proven. 465 refuted. 0 times theorem prover too weak. 3822 trivial. 0 not checked. [2025-03-08 15:19:00,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 15:19:00,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174574546] [2025-03-08 15:19:00,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174574546] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 15:19:00,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097461018] [2025-03-08 15:19:00,774 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:19:00,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 15:19:00,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 15:19:00,778 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 15:19:00,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 15:19:00,869 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 321 statements into 1 equivalence classes. [2025-03-08 15:19:01,286 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 321 of 321 statements. [2025-03-08 15:19:01,286 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:19:01,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:19:01,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 60 conjuncts are in the unsatisfiable core [2025-03-08 15:19:01,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 15:19:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2831 proven. 648 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2025-03-08 15:19:05,030 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 15:19:18,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097461018] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 15:19:18,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 15:19:18,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 26] total 38 [2025-03-08 15:19:18,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835092098] [2025-03-08 15:19:18,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 15:19:18,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-08 15:19:18,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 15:19:18,783 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-08 15:19:18,783 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1800, Unknown=2, NotChecked=0, Total=2162 [2025-03-08 15:19:18,783 INFO L87 Difference]: Start difference. First operand 1669 states and 2381 transitions. Second operand has 38 states, 35 states have (on average 3.942857142857143) internal successors, (138), 32 states have internal predecessors, (138), 15 states have call successors, (98), 9 states have call predecessors, (98), 12 states have return successors, (98), 15 states have call predecessors, (98), 15 states have call successors, (98)