./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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_1.5.800.v20200727-1323.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/nla-digbench-scaling/ps6-ll_valuebound1.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 87608ec580cc80a59c7836f9aeadd0fc773dea5ebb620dd020651936daa4e397 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 07:23:06,886 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 07:23:06,956 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 07:23:06,962 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 07:23:06,963 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 07:23:06,993 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 07:23:06,995 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 07:23:06,996 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 07:23:06,996 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 07:23:06,997 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 07:23:06,998 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 07:23:06,998 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 07:23:06,999 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 07:23:07,000 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 07:23:07,000 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 07:23:07,001 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 07:23:07,002 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 07:23:07,002 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 07:23:07,002 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 07:23:07,003 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 07:23:07,003 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 07:23:07,008 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 07:23:07,008 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 07:23:07,008 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 07:23:07,008 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 07:23:07,009 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 07:23:07,009 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 07:23:07,009 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 07:23:07,009 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 07:23:07,010 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 07:23:07,010 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 07:23:07,011 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 07:23:07,011 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 07:23:07,011 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 07:23:07,012 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 07:23:07,012 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 07:23:07,012 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 07:23:07,012 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 07:23:07,012 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 07:23:07,012 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 07:23:07,013 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 07:23:07,013 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 07:23:07,013 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87608ec580cc80a59c7836f9aeadd0fc773dea5ebb620dd020651936daa4e397 [2024-11-16 07:23:07,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 07:23:07,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 07:23:07,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 07:23:07,271 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 07:23:07,272 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 07:23:07,273 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound1.c [2024-11-16 07:23:08,639 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 07:23:08,815 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 07:23:08,816 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound1.c [2024-11-16 07:23:08,826 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/821e2f30a/182cb77e5dba49d8b84dbc698377258f/FLAG0f7cdb550 [2024-11-16 07:23:08,841 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/821e2f30a/182cb77e5dba49d8b84dbc698377258f [2024-11-16 07:23:08,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 07:23:08,846 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 07:23:08,847 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 07:23:08,847 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 07:23:08,852 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 07:23:08,853 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:23:08" (1/1) ... [2024-11-16 07:23:08,853 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3058f83c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:08, skipping insertion in model container [2024-11-16 07:23:08,853 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:23:08" (1/1) ... [2024-11-16 07:23:08,870 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 07:23:09,012 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/nla-digbench-scaling/ps6-ll_valuebound1.c[458,471] [2024-11-16 07:23:09,030 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 07:23:09,037 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 07:23:09,048 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/nla-digbench-scaling/ps6-ll_valuebound1.c[458,471] [2024-11-16 07:23:09,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 07:23:09,067 INFO L204 MainTranslator]: Completed translation [2024-11-16 07:23:09,068 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09 WrapperNode [2024-11-16 07:23:09,068 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 07:23:09,069 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 07:23:09,069 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 07:23:09,069 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 07:23:09,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,078 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,090 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 35 [2024-11-16 07:23:09,091 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 07:23:09,091 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 07:23:09,091 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 07:23:09,091 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 07:23:09,100 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,101 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,110 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]. [2024-11-16 07:23:09,111 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,111 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,116 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,117 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,117 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,118 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,119 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 07:23:09,120 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 07:23:09,120 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 07:23:09,120 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 07:23:09,121 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 07:23:09,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:23:09,148 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) [2024-11-16 07:23:09,150 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 [2024-11-16 07:23:09,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 07:23:09,188 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-16 07:23:09,189 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-16 07:23:09,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 07:23:09,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 07:23:09,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 07:23:09,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-16 07:23:09,189 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-16 07:23:09,242 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 07:23:09,244 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 07:23:09,411 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-16 07:23:09,412 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 07:23:09,425 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 07:23:09,425 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 07:23:09,426 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:23:09 BoogieIcfgContainer [2024-11-16 07:23:09,426 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 07:23:09,429 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 07:23:09,429 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 07:23:09,433 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 07:23:09,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:23:08" (1/3) ... [2024-11-16 07:23:09,434 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ebec20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:23:09, skipping insertion in model container [2024-11-16 07:23:09,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (2/3) ... [2024-11-16 07:23:09,434 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ebec20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:23:09, skipping insertion in model container [2024-11-16 07:23:09,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:23:09" (3/3) ... [2024-11-16 07:23:09,435 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound1.c [2024-11-16 07:23:09,453 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 07:23:09,453 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 07:23:09,506 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 07:23:09,512 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;@6a24fa4c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 07:23:09,513 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 07:23:09,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-16 07:23:09,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-16 07:23:09,522 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:23:09,522 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:23:09,523 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:23:09,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:23:09,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1686742115, now seen corresponding path program 1 times [2024-11-16 07:23:09,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:23:09,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546656937] [2024-11-16 07:23:09,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:23:09,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:23:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:09,668 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:23:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:09,682 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 07:23:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 07:23:09,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:23:09,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546656937] [2024-11-16 07:23:09,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546656937] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:23:09,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:23:09,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 07:23:09,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229920932] [2024-11-16 07:23:09,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:23:09,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 07:23:09,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:23:09,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 07:23:09,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 07:23:09,717 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 07:23:09,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:23:09,731 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2024-11-16 07:23:09,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 07:23:09,733 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-11-16 07:23:09,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:23:09,739 INFO L225 Difference]: With dead ends: 49 [2024-11-16 07:23:09,739 INFO L226 Difference]: Without dead ends: 22 [2024-11-16 07:23:09,742 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 07:23:09,745 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:23:09,746 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:23:09,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-16 07:23:09,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-16 07:23:09,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-16 07:23:09,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-11-16 07:23:09,779 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2024-11-16 07:23:09,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:23:09,779 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-11-16 07:23:09,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 07:23:09,780 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-11-16 07:23:09,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-16 07:23:09,782 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:23:09,782 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:23:09,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 07:23:09,783 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:23:09,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:23:09,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1225136495, now seen corresponding path program 1 times [2024-11-16 07:23:09,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:23:09,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006684516] [2024-11-16 07:23:09,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:23:09,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:23:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:23:09,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520176399] [2024-11-16 07:23:09,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:23:09,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:23:09,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:23:09,827 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) [2024-11-16 07:23:09,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 07:23:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:09,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-16 07:23:09,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:23:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 07:23:10,017 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 07:23:10,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:23:10,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006684516] [2024-11-16 07:23:10,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:23:10,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520176399] [2024-11-16 07:23:10,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520176399] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:23:10,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:23:10,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 07:23:10,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808019451] [2024-11-16 07:23:10,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:23:10,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 07:23:10,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:23:10,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 07:23:10,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 07:23:10,021 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 07:23:10,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:23:10,107 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2024-11-16 07:23:10,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 07:23:10,109 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-11-16 07:23:10,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:23:10,110 INFO L225 Difference]: With dead ends: 35 [2024-11-16 07:23:10,110 INFO L226 Difference]: Without dead ends: 30 [2024-11-16 07:23:10,110 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-16 07:23:10,112 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 07:23:10,112 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 77 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 07:23:10,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-16 07:23:10,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-16 07:23:10,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-16 07:23:10,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-11-16 07:23:10,120 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 20 [2024-11-16 07:23:10,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:23:10,120 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-11-16 07:23:10,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 07:23:10,120 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-11-16 07:23:10,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-16 07:23:10,123 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:23:10,124 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:23:10,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 07:23:10,324 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 [2024-11-16 07:23:10,325 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:23:10,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:23:10,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1863893392, now seen corresponding path program 1 times [2024-11-16 07:23:10,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:23:10,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015495731] [2024-11-16 07:23:10,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:23:10,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:23:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:23:10,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183540704] [2024-11-16 07:23:10,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:23:10,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:23:10,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:23:10,375 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) [2024-11-16 07:23:10,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 07:23:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:10,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-16 07:23:10,446 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:23:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 07:23:10,542 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:23:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-16 07:23:10,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:23:10,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015495731] [2024-11-16 07:23:10,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:23:10,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183540704] [2024-11-16 07:23:10,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183540704] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-16 07:23:10,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 07:23:10,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-16 07:23:10,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879277281] [2024-11-16 07:23:10,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:23:10,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 07:23:10,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:23:10,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 07:23:10,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-16 07:23:10,686 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-16 07:23:10,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:23:10,740 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2024-11-16 07:23:10,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 07:23:10,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2024-11-16 07:23:10,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:23:10,743 INFO L225 Difference]: With dead ends: 37 [2024-11-16 07:23:10,744 INFO L226 Difference]: Without dead ends: 32 [2024-11-16 07:23:10,744 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-16 07:23:10,745 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:23:10,745 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 72 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:23:10,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-16 07:23:10,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-16 07:23:10,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-16 07:23:10,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2024-11-16 07:23:10,764 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2024-11-16 07:23:10,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:23:10,764 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2024-11-16 07:23:10,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-16 07:23:10,765 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2024-11-16 07:23:10,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-16 07:23:10,766 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:23:10,766 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:23:10,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-16 07:23:10,966 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,SelfDestructingSolverStorable2 [2024-11-16 07:23:10,967 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:23:10,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:23:10,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1980041958, now seen corresponding path program 1 times [2024-11-16 07:23:10,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:23:10,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158109415] [2024-11-16 07:23:10,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:23:10,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:23:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:23:11,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362683429] [2024-11-16 07:23:11,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:23:11,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:23:11,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:23:11,008 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) [2024-11-16 07:23:11,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 07:23:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:11,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-16 07:23:11,069 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:23:11,181 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-16 07:23:11,183 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:23:11,319 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-16 07:23:11,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:23:11,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158109415] [2024-11-16 07:23:11,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:23:11,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362683429] [2024-11-16 07:23:11,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362683429] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:23:11,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 07:23:11,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-11-16 07:23:11,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873546578] [2024-11-16 07:23:11,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 07:23:11,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-16 07:23:11,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:23:11,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-16 07:23:11,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-16 07:23:11,322 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 10 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-16 07:23:11,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:23:11,440 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2024-11-16 07:23:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 07:23:11,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 39 [2024-11-16 07:23:11,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:23:11,441 INFO L225 Difference]: With dead ends: 53 [2024-11-16 07:23:11,442 INFO L226 Difference]: Without dead ends: 44 [2024-11-16 07:23:11,442 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-16 07:23:11,443 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 07:23:11,443 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 198 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 07:23:11,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-16 07:23:11,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-11-16 07:23:11,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-16 07:23:11,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2024-11-16 07:23:11,459 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 39 [2024-11-16 07:23:11,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:23:11,460 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2024-11-16 07:23:11,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-16 07:23:11,460 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2024-11-16 07:23:11,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-16 07:23:11,461 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:23:11,462 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:23:11,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 07:23:11,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:23:11,667 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:23:11,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:23:11,667 INFO L85 PathProgramCache]: Analyzing trace with hash 327609507, now seen corresponding path program 2 times [2024-11-16 07:23:11,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:23:11,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817657569] [2024-11-16 07:23:11,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:23:11,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:23:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:12,016 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:23:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:12,054 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 07:23:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:12,062 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-16 07:23:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:12,076 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-16 07:23:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:12,086 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-16 07:23:12,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:12,120 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-16 07:23:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:12,129 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-16 07:23:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:12,132 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-11-16 07:23:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-16 07:23:12,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:23:12,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817657569] [2024-11-16 07:23:12,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817657569] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:23:12,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77772873] [2024-11-16 07:23:12,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 07:23:12,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:23:12,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:23:12,143 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) [2024-11-16 07:23:12,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 07:23:12,199 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 07:23:12,199 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:23:12,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-16 07:23:12,203 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:23:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 80 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-16 07:23:12,359 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:23:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-16 07:23:12,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77772873] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:23:12,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:23:12,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-11-16 07:23:12,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689677190] [2024-11-16 07:23:12,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:23:12,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-16 07:23:12,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:23:12,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-16 07:23:12,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2024-11-16 07:23:12,503 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 17 states have internal predecessors, (61), 16 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 15 states have call predecessors, (20), 16 states have call successors, (20) [2024-11-16 07:23:12,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:23:12,566 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2024-11-16 07:23:12,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-16 07:23:12,567 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 17 states have internal predecessors, (61), 16 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 15 states have call predecessors, (20), 16 states have call successors, (20) Word has length 63 [2024-11-16 07:23:12,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:23:12,567 INFO L225 Difference]: With dead ends: 50 [2024-11-16 07:23:12,567 INFO L226 Difference]: Without dead ends: 0 [2024-11-16 07:23:12,568 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2024-11-16 07:23:12,568 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:23:12,569 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 93 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:23:12,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-16 07:23:12,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-16 07:23:12,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 07:23:12,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-16 07:23:12,570 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63 [2024-11-16 07:23:12,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:23:12,570 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-16 07:23:12,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 17 states have internal predecessors, (61), 16 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 15 states have call predecessors, (20), 16 states have call successors, (20) [2024-11-16 07:23:12,570 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-16 07:23:12,570 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-16 07:23:12,572 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-16 07:23:12,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-16 07:23:12,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:23:12,776 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2024-11-16 07:23:12,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-16 07:23:14,031 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-16 07:23:14,049 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 07:23:14 BoogieIcfgContainer [2024-11-16 07:23:14,049 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-16 07:23:14,050 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-16 07:23:14,050 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-16 07:23:14,050 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-16 07:23:14,051 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:23:09" (3/4) ... [2024-11-16 07:23:14,053 INFO L143 WitnessPrinter]: Generating witness for correct program [2024-11-16 07:23:14,057 INFO L393 IcfgBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-11-16 07:23:14,057 INFO L393 IcfgBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-11-16 07:23:14,060 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2024-11-16 07:23:14,060 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-11-16 07:23:14,061 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-16 07:23:14,061 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-16 07:23:14,137 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-16 07:23:14,140 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-11-16 07:23:14,141 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-16 07:23:14,141 INFO L158 Benchmark]: Toolchain (without parser) took 5295.26ms. Allocated memory is still 157.3MB. Free memory was 89.2MB in the beginning and 65.0MB in the end (delta: 24.2MB). Peak memory consumption was 25.7MB. Max. memory is 16.1GB. [2024-11-16 07:23:14,141 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 117.4MB. Free memory is still 78.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-16 07:23:14,142 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.86ms. Allocated memory is still 157.3MB. Free memory was 88.9MB in the beginning and 76.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-16 07:23:14,142 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.18ms. Allocated memory is still 157.3MB. Free memory was 76.3MB in the beginning and 74.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-16 07:23:14,142 INFO L158 Benchmark]: Boogie Preprocessor took 28.28ms. Allocated memory is still 157.3MB. Free memory was 74.7MB in the beginning and 73.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-16 07:23:14,142 INFO L158 Benchmark]: IcfgBuilder took 306.12ms. Allocated memory is still 157.3MB. Free memory was 73.3MB in the beginning and 125.0MB in the end (delta: -51.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-16 07:23:14,142 INFO L158 Benchmark]: TraceAbstraction took 4620.49ms. Allocated memory is still 157.3MB. Free memory was 124.4MB in the beginning and 69.2MB in the end (delta: 55.3MB). Peak memory consumption was 58.4MB. Max. memory is 16.1GB. [2024-11-16 07:23:14,143 INFO L158 Benchmark]: Witness Printer took 90.94ms. Allocated memory is still 157.3MB. Free memory was 69.2MB in the beginning and 65.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-16 07:23:14,144 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 117.4MB. Free memory is still 78.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 220.86ms. Allocated memory is still 157.3MB. Free memory was 88.9MB in the beginning and 76.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.18ms. Allocated memory is still 157.3MB. Free memory was 76.3MB in the beginning and 74.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.28ms. Allocated memory is still 157.3MB. Free memory was 74.7MB in the beginning and 73.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 306.12ms. Allocated memory is still 157.3MB. Free memory was 73.3MB in the beginning and 125.0MB in the end (delta: -51.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 4620.49ms. Allocated memory is still 157.3MB. Free memory was 124.4MB in the beginning and 69.2MB in the end (delta: 55.3MB). Peak memory consumption was 58.4MB. Max. memory is 16.1GB. * Witness Printer took 90.94ms. Allocated memory is still 157.3MB. Free memory was 69.2MB in the beginning and 65.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.3s, OverallIterations: 5, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10 mSDsluCounter, 469 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 355 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 148 IncrementalHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 114 mSDtfsCounter, 148 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 311 GetRequests, 268 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=4, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 319 NumberOfCodeBlocks, 319 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 353 ConstructedInterpolants, 0 QuantifiedInterpolants, 1238 SizeOfPredicates, 4 NumberOfNonLiveVariables, 382 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 394/426 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Location Invariant Derived location invariant: null - ProcedureContractResult [Line: 6]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (cond != 0) - ProcedureContractResult [Line: 9]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= cond) Ensures: (1 <= cond) RESULT: Ultimate proved your program to be correct! [2024-11-16 07:23:14,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE