./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor1.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 fa90627ffc045ef90595d49d60ca0f6095b53b667a9d0f028eb93e7bf4c6c579 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-10 22:07:37,606 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-10 22:07:37,681 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-10 22:07:37,687 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-10 22:07:37,689 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-10 22:07:37,714 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-10 22:07:37,714 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-10 22:07:37,715 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-10 22:07:37,715 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-10 22:07:37,716 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-10 22:07:37,717 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-10 22:07:37,717 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-10 22:07:37,718 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-10 22:07:37,719 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-10 22:07:37,720 INFO L153 SettingsManager]: * Use SBE=true [2024-10-10 22:07:37,720 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-10 22:07:37,721 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-10 22:07:37,721 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-10 22:07:37,721 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-10 22:07:37,721 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-10 22:07:37,722 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-10 22:07:37,722 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-10 22:07:37,726 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-10 22:07:37,726 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-10 22:07:37,727 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-10 22:07:37,727 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-10 22:07:37,727 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-10 22:07:37,727 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-10 22:07:37,727 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-10 22:07:37,728 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-10 22:07:37,728 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-10 22:07:37,728 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-10 22:07:37,728 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:07:37,728 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-10 22:07:37,728 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-10 22:07:37,729 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-10 22:07:37,729 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-10 22:07:37,729 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-10 22:07:37,730 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-10 22:07:37,730 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-10 22:07:37,730 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-10 22:07:37,730 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-10 22:07:37,732 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa90627ffc045ef90595d49d60ca0f6095b53b667a9d0f028eb93e7bf4c6c579 [2024-10-10 22:07:37,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-10 22:07:38,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-10 22:07:38,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-10 22:07:38,024 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-10 22:07:38,025 INFO L274 PluginConnector]: CDTParser initialized [2024-10-10 22:07:38,026 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor1.i [2024-10-10 22:07:39,410 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-10 22:07:39,602 INFO L384 CDTParser]: Found 1 translation units. [2024-10-10 22:07:39,602 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor1.i [2024-10-10 22:07:39,608 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/be3a04458/e3de1961af7c4f02b9212f90b9d92a7e/FLAG047369cfd [2024-10-10 22:07:39,998 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/be3a04458/e3de1961af7c4f02b9212f90b9d92a7e [2024-10-10 22:07:40,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-10 22:07:40,002 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-10 22:07:40,003 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-10 22:07:40,003 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-10 22:07:40,007 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-10 22:07:40,007 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:07:39" (1/1) ... [2024-10-10 22:07:40,008 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3531c257 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:07:40, skipping insertion in model container [2024-10-10 22:07:40,008 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:07:39" (1/1) ... [2024-10-10 22:07:40,022 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-10 22:07:40,182 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor1.i[1285,1298] [2024-10-10 22:07:40,188 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:07:40,196 INFO L200 MainTranslator]: Completed pre-run [2024-10-10 22:07:40,219 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor1.i[1285,1298] [2024-10-10 22:07:40,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:07:40,236 INFO L204 MainTranslator]: Completed translation [2024-10-10 22:07:40,237 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:07:40 WrapperNode [2024-10-10 22:07:40,237 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-10 22:07:40,238 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-10 22:07:40,238 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-10 22:07:40,239 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-10 22:07:40,245 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:07:40" (1/1) ... [2024-10-10 22:07:40,252 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:07:40" (1/1) ... [2024-10-10 22:07:40,275 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 76 [2024-10-10 22:07:40,276 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-10 22:07:40,276 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-10 22:07:40,277 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-10 22:07:40,277 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-10 22:07:40,285 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:07:40" (1/1) ... [2024-10-10 22:07:40,286 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:07:40" (1/1) ... [2024-10-10 22:07:40,287 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:07:40" (1/1) ... [2024-10-10 22:07:40,304 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 7, 11]. 55 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0]. The 5 writes are split as follows [0, 0, 5]. [2024-10-10 22:07:40,305 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:07:40" (1/1) ... [2024-10-10 22:07:40,305 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:07:40" (1/1) ... [2024-10-10 22:07:40,309 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:07:40" (1/1) ... [2024-10-10 22:07:40,311 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:07:40" (1/1) ... [2024-10-10 22:07:40,312 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:07:40" (1/1) ... [2024-10-10 22:07:40,313 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:07:40" (1/1) ... [2024-10-10 22:07:40,318 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-10 22:07:40,319 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-10 22:07:40,319 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-10 22:07:40,319 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-10 22:07:40,320 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:07:40" (1/1) ... [2024-10-10 22:07:40,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:07:40,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:07:40,350 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-10 22:07:40,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-10 22:07:40,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-10 22:07:40,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-10 22:07:40,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-10 22:07:40,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-10 22:07:40,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-10 22:07:40,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-10 22:07:40,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-10 22:07:40,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-10 22:07:40,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-10 22:07:40,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-10 22:07:40,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-10 22:07:40,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-10 22:07:40,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-10 22:07:40,434 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2024-10-10 22:07:40,435 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2024-10-10 22:07:40,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-10 22:07:40,514 INFO L238 CfgBuilder]: Building ICFG [2024-10-10 22:07:40,516 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-10 22:07:40,694 INFO L? ?]: Removed 22 outVars from TransFormulas that were not future-live. [2024-10-10 22:07:40,694 INFO L287 CfgBuilder]: Performing block encoding [2024-10-10 22:07:40,732 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-10 22:07:40,733 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-10 22:07:40,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:07:40 BoogieIcfgContainer [2024-10-10 22:07:40,734 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-10 22:07:40,735 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-10 22:07:40,736 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-10 22:07:40,739 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-10 22:07:40,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.10 10:07:39" (1/3) ... [2024-10-10 22:07:40,740 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bf62da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:07:40, skipping insertion in model container [2024-10-10 22:07:40,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:07:40" (2/3) ... [2024-10-10 22:07:40,740 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bf62da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:07:40, skipping insertion in model container [2024-10-10 22:07:40,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:07:40" (3/3) ... [2024-10-10 22:07:40,742 INFO L112 eAbstractionObserver]: Analyzing ICFG xor1.i [2024-10-10 22:07:40,756 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-10 22:07:40,756 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-10 22:07:40,811 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-10 22:07:40,818 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;@671f6e1b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-10 22:07:40,818 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-10 22:07:40,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:07:40,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-10 22:07:40,828 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:07:40,829 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:07:40,829 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:07:40,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:07:40,834 INFO L85 PathProgramCache]: Analyzing trace with hash 787868281, now seen corresponding path program 1 times [2024-10-10 22:07:40,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:07:40,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641462141] [2024-10-10 22:07:40,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:07:40,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:07:40,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:41,078 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-10 22:07:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:41,104 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-10 22:07:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:41,113 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-10 22:07:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:07:41,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:07:41,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641462141] [2024-10-10 22:07:41,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641462141] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:07:41,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916498130] [2024-10-10 22:07:41,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:07:41,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:07:41,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:07:41,126 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:07:41,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-10 22:07:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:41,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-10-10 22:07:41,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:07:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:07:41,212 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 22:07:41,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916498130] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:07:41,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 22:07:41,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2024-10-10 22:07:41,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643701865] [2024-10-10 22:07:41,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:07:41,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-10 22:07:41,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:07:41,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-10 22:07:41,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:07:41,238 INFO L87 Difference]: Start difference. First operand has 25 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 22:07:41,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:07:41,271 INFO L93 Difference]: Finished difference Result 48 states and 71 transitions. [2024-10-10 22:07:41,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-10 22:07:41,274 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2024-10-10 22:07:41,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:07:41,280 INFO L225 Difference]: With dead ends: 48 [2024-10-10 22:07:41,280 INFO L226 Difference]: Without dead ends: 23 [2024-10-10 22:07:41,282 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:07:41,286 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:07:41,287 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:07:41,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-10 22:07:41,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-10 22:07:41,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:07:41,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2024-10-10 22:07:41,332 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 25 [2024-10-10 22:07:41,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:07:41,333 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2024-10-10 22:07:41,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 22:07:41,333 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2024-10-10 22:07:41,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-10 22:07:41,335 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:07:41,335 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:07:41,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-10 22:07:41,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-10-10 22:07:41,537 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:07:41,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:07:41,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1966949311, now seen corresponding path program 1 times [2024-10-10 22:07:41,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:07:41,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081241772] [2024-10-10 22:07:41,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:07:41,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:07:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:41,606 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-10 22:07:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:41,630 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-10 22:07:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:41,644 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-10 22:07:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:07:41,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:07:41,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081241772] [2024-10-10 22:07:41,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081241772] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:07:41,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755920304] [2024-10-10 22:07:41,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:07:41,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:07:41,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:07:41,653 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:07:41,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-10 22:07:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:41,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-10 22:07:41,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:07:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-10 22:07:41,777 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 22:07:41,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755920304] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:07:41,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 22:07:41,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-10-10 22:07:41,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447833196] [2024-10-10 22:07:41,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:07:41,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 22:07:41,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:07:41,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 22:07:41,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 22:07:41,783 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-10 22:07:41,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:07:41,804 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2024-10-10 22:07:41,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 22:07:41,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-10-10 22:07:41,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:07:41,806 INFO L225 Difference]: With dead ends: 45 [2024-10-10 22:07:41,806 INFO L226 Difference]: Without dead ends: 24 [2024-10-10 22:07:41,807 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 22:07:41,808 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:07:41,809 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:07:41,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-10 22:07:41,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-10-10 22:07:41,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:07:41,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2024-10-10 22:07:41,815 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 25 [2024-10-10 22:07:41,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:07:41,815 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2024-10-10 22:07:41,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-10 22:07:41,816 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2024-10-10 22:07:41,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-10 22:07:41,817 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:07:41,818 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:07:41,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-10 22:07:42,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:07:42,022 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:07:42,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:07:42,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1565927272, now seen corresponding path program 1 times [2024-10-10 22:07:42,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:07:42,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056425459] [2024-10-10 22:07:42,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:07:42,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:07:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:42,109 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-10 22:07:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:42,122 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-10 22:07:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:42,128 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-10 22:07:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:07:42,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:07:42,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056425459] [2024-10-10 22:07:42,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056425459] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:07:42,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213199807] [2024-10-10 22:07:42,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:07:42,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:07:42,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:07:42,137 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:07:42,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-10 22:07:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:42,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-10 22:07:42,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:07:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-10 22:07:42,207 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 22:07:42,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213199807] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:07:42,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 22:07:42,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2024-10-10 22:07:42,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701433246] [2024-10-10 22:07:42,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:07:42,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 22:07:42,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:07:42,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 22:07:42,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 22:07:42,210 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 22:07:42,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:07:42,229 INFO L93 Difference]: Finished difference Result 49 states and 68 transitions. [2024-10-10 22:07:42,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 22:07:42,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-10-10 22:07:42,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:07:42,231 INFO L225 Difference]: With dead ends: 49 [2024-10-10 22:07:42,231 INFO L226 Difference]: Without dead ends: 30 [2024-10-10 22:07:42,233 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 22:07:42,234 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:07:42,234 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 46 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:07:42,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-10 22:07:42,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2024-10-10 22:07:42,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:07:42,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2024-10-10 22:07:42,242 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 26 [2024-10-10 22:07:42,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:07:42,243 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2024-10-10 22:07:42,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 22:07:42,244 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2024-10-10 22:07:42,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-10 22:07:42,246 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:07:42,246 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:07:42,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-10 22:07:42,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:07:42,447 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:07:42,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:07:42,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1251937313, now seen corresponding path program 1 times [2024-10-10 22:07:42,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:07:42,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280706276] [2024-10-10 22:07:42,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:07:42,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:07:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:42,545 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-10 22:07:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:42,558 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 22:07:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:42,573 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-10 22:07:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-10 22:07:42,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:07:42,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280706276] [2024-10-10 22:07:42,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280706276] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:07:42,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267809000] [2024-10-10 22:07:42,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:07:42,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:07:42,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:07:42,626 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:07:42,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-10 22:07:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:42,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-10 22:07:42,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:07:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-10 22:07:42,723 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 22:07:42,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267809000] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:07:42,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 22:07:42,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-10-10 22:07:42,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188601699] [2024-10-10 22:07:42,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:07:42,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 22:07:42,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:07:42,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 22:07:42,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-10 22:07:42,728 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 22:07:42,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:07:42,748 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2024-10-10 22:07:42,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 22:07:42,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-10-10 22:07:42,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:07:42,749 INFO L225 Difference]: With dead ends: 42 [2024-10-10 22:07:42,750 INFO L226 Difference]: Without dead ends: 26 [2024-10-10 22:07:42,750 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-10 22:07:42,751 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:07:42,751 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:07:42,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-10 22:07:42,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-10-10 22:07:42,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:07:42,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2024-10-10 22:07:42,755 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 35 [2024-10-10 22:07:42,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:07:42,755 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2024-10-10 22:07:42,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 22:07:42,755 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2024-10-10 22:07:42,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-10 22:07:42,756 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:07:42,756 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:07:42,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-10 22:07:42,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:07:42,957 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:07:42,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:07:42,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1295306018, now seen corresponding path program 1 times [2024-10-10 22:07:42,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:07:42,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111035517] [2024-10-10 22:07:42,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:07:42,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:07:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:43,027 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-10 22:07:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:43,034 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 22:07:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:43,047 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-10 22:07:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:43,079 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-10 22:07:43,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:07:43,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111035517] [2024-10-10 22:07:43,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111035517] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:07:43,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163169922] [2024-10-10 22:07:43,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:07:43,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:07:43,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:07:43,082 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:07:43,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-10 22:07:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:43,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-10 22:07:43,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:07:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-10 22:07:43,194 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:07:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-10 22:07:43,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163169922] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:07:43,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:07:43,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2024-10-10 22:07:43,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925526297] [2024-10-10 22:07:43,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:07:43,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-10 22:07:43,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:07:43,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-10 22:07:43,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-10 22:07:43,247 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 22:07:43,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:07:43,288 INFO L93 Difference]: Finished difference Result 63 states and 89 transitions. [2024-10-10 22:07:43,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-10 22:07:43,289 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 36 [2024-10-10 22:07:43,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:07:43,290 INFO L225 Difference]: With dead ends: 63 [2024-10-10 22:07:43,290 INFO L226 Difference]: Without dead ends: 40 [2024-10-10 22:07:43,291 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-10 22:07:43,291 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:07:43,292 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 112 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:07:43,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-10 22:07:43,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2024-10-10 22:07:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:07:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2024-10-10 22:07:43,296 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 36 [2024-10-10 22:07:43,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:07:43,297 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2024-10-10 22:07:43,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 22:07:43,297 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2024-10-10 22:07:43,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-10 22:07:43,298 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:07:43,298 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:07:43,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-10 22:07:43,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:07:43,502 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:07:43,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:07:43,502 INFO L85 PathProgramCache]: Analyzing trace with hash -2139585112, now seen corresponding path program 2 times [2024-10-10 22:07:43,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:07:43,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695981312] [2024-10-10 22:07:43,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:07:43,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:07:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:43,617 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-10 22:07:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:43,623 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-10 22:07:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:43,627 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-10 22:07:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:43,632 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2024-10-10 22:07:43,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:07:43,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695981312] [2024-10-10 22:07:43,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695981312] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:07:43,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786077273] [2024-10-10 22:07:43,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:07:43,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:07:43,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:07:43,634 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:07:43,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-10 22:07:43,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:07:43,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:07:43,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-10 22:07:43,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:07:43,831 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-10-10 22:07:43,831 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:07:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-10-10 22:07:43,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786077273] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:07:43,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:07:43,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2024-10-10 22:07:43,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723198099] [2024-10-10 22:07:43,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:07:43,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-10 22:07:43,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:07:43,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-10 22:07:43,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-10 22:07:43,913 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-10 22:07:43,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:07:43,965 INFO L93 Difference]: Finished difference Result 71 states and 97 transitions. [2024-10-10 22:07:43,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-10 22:07:43,968 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2024-10-10 22:07:43,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:07:43,969 INFO L225 Difference]: With dead ends: 71 [2024-10-10 22:07:43,969 INFO L226 Difference]: Without dead ends: 42 [2024-10-10 22:07:43,969 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-10 22:07:43,970 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:07:43,970 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 138 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:07:43,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-10 22:07:43,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-10-10 22:07:43,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:07:43,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2024-10-10 22:07:43,976 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 48 [2024-10-10 22:07:43,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:07:43,977 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2024-10-10 22:07:43,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-10 22:07:43,977 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2024-10-10 22:07:43,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-10 22:07:43,978 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:07:43,978 INFO L215 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:07:43,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-10 22:07:44,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-10 22:07:44,180 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:07:44,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:07:44,180 INFO L85 PathProgramCache]: Analyzing trace with hash 230774751, now seen corresponding path program 3 times [2024-10-10 22:07:44,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:07:44,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309678227] [2024-10-10 22:07:44,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:07:44,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:07:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:44,253 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 22:07:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:44,276 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-10 22:07:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:44,281 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-10 22:07:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-10-10 22:07:44,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:07:44,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309678227] [2024-10-10 22:07:44,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309678227] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:07:44,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175272040] [2024-10-10 22:07:44,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:07:44,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:07:44,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:07:44,289 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:07:44,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-10 22:07:44,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-10 22:07:44,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:07:44,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-10 22:07:44,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:07:44,397 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-10-10 22:07:44,397 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:07:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-10-10 22:07:44,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175272040] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:07:44,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:07:44,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-10 22:07:44,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308790115] [2024-10-10 22:07:44,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:07:44,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-10 22:07:44,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:07:44,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-10 22:07:44,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-10 22:07:44,440 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:07:44,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:07:44,483 INFO L93 Difference]: Finished difference Result 85 states and 117 transitions. [2024-10-10 22:07:44,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-10 22:07:44,484 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2024-10-10 22:07:44,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:07:44,485 INFO L225 Difference]: With dead ends: 85 [2024-10-10 22:07:44,485 INFO L226 Difference]: Without dead ends: 57 [2024-10-10 22:07:44,485 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-10 22:07:44,486 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:07:44,486 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 153 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:07:44,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-10 22:07:44,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2024-10-10 22:07:44,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 47 states have internal predecessors, (59), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:07:44,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2024-10-10 22:07:44,491 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 55 [2024-10-10 22:07:44,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:07:44,491 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2024-10-10 22:07:44,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:07:44,492 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2024-10-10 22:07:44,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-10 22:07:44,493 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:07:44,493 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:07:44,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-10 22:07:44,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:07:44,697 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:07:44,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:07:44,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1694041674, now seen corresponding path program 4 times [2024-10-10 22:07:44,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:07:44,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420009694] [2024-10-10 22:07:44,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:07:44,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:07:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:44,910 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 22:07:44,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:44,917 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-10 22:07:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:44,924 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-10 22:07:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-10-10 22:07:44,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:07:44,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420009694] [2024-10-10 22:07:44,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420009694] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:07:44,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013138052] [2024-10-10 22:07:44,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:07:44,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:07:44,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:07:44,932 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:07:44,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-10 22:07:45,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:07:45,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:07:45,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-10 22:07:45,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:07:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2024-10-10 22:07:45,097 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:07:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2024-10-10 22:07:45,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013138052] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:07:45,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:07:45,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 21 [2024-10-10 22:07:45,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099508337] [2024-10-10 22:07:45,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:07:45,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-10 22:07:45,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:07:45,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-10 22:07:45,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2024-10-10 22:07:45,166 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:07:45,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:07:45,227 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2024-10-10 22:07:45,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-10 22:07:45,228 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 68 [2024-10-10 22:07:45,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:07:45,229 INFO L225 Difference]: With dead ends: 123 [2024-10-10 22:07:45,229 INFO L226 Difference]: Without dead ends: 83 [2024-10-10 22:07:45,229 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2024-10-10 22:07:45,230 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 118 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:07:45,232 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 191 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:07:45,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-10-10 22:07:45,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-10-10 22:07:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.3461538461538463) internal successors, (105), 78 states have internal predecessors, (105), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:07:45,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2024-10-10 22:07:45,238 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 68 [2024-10-10 22:07:45,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:07:45,239 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2024-10-10 22:07:45,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:07:45,239 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2024-10-10 22:07:45,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-10-10 22:07:45,244 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:07:45,244 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 24, 11, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:07:45,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-10 22:07:45,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-10 22:07:45,446 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:07:45,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:07:45,446 INFO L85 PathProgramCache]: Analyzing trace with hash 142341864, now seen corresponding path program 5 times [2024-10-10 22:07:45,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:07:45,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111627065] [2024-10-10 22:07:45,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:07:45,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:07:45,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:45,727 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-10 22:07:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:45,735 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-10-10 22:07:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:45,743 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-10-10 22:07:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 933 trivial. 0 not checked. [2024-10-10 22:07:45,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:07:45,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111627065] [2024-10-10 22:07:45,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111627065] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:07:45,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800948059] [2024-10-10 22:07:45,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 22:07:45,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:07:45,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:07:45,754 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:07:45,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-10 22:07:46,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-10-10 22:07:46,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:07:46,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-10 22:07:46,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:07:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 420 proven. 92 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2024-10-10 22:07:46,369 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:07:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 514 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2024-10-10 22:07:46,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800948059] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:07:46,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:07:46,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2024-10-10 22:07:46,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111786918] [2024-10-10 22:07:46,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:07:46,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-10 22:07:46,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:07:46,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-10 22:07:46,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2024-10-10 22:07:46,629 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:07:46,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:07:46,716 INFO L93 Difference]: Finished difference Result 214 states and 313 transitions. [2024-10-10 22:07:46,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-10 22:07:46,717 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 114 [2024-10-10 22:07:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:07:46,718 INFO L225 Difference]: With dead ends: 214 [2024-10-10 22:07:46,718 INFO L226 Difference]: Without dead ends: 144 [2024-10-10 22:07:46,719 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2024-10-10 22:07:46,719 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 328 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:07:46,719 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 261 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:07:46,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-10-10 22:07:46,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2024-10-10 22:07:46,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.410071942446043) internal successors, (196), 139 states have internal predecessors, (196), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:07:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 202 transitions. [2024-10-10 22:07:46,727 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 202 transitions. Word has length 114 [2024-10-10 22:07:46,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:07:46,727 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 202 transitions. [2024-10-10 22:07:46,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:07:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 202 transitions. [2024-10-10 22:07:46,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2024-10-10 22:07:46,729 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:07:46,730 INFO L215 NwaCegarLoop]: trace histogram [54, 54, 54, 12, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:07:46,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-10 22:07:46,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:07:46,934 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:07:46,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:07:46,934 INFO L85 PathProgramCache]: Analyzing trace with hash -978847169, now seen corresponding path program 6 times [2024-10-10 22:07:46,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:07:46,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496190546] [2024-10-10 22:07:46,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:07:46,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:07:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:47,291 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-10 22:07:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:47,316 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-10-10 22:07:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:47,337 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2024-10-10 22:07:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 4488 trivial. 0 not checked. [2024-10-10 22:07:47,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:07:47,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496190546] [2024-10-10 22:07:47,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496190546] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:07:47,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087233021] [2024-10-10 22:07:47,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-10 22:07:47,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:07:47,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:07:47,362 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:07:47,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-10 22:07:47,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-10-10 22:07:47,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:07:47,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-10 22:07:47,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:07:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 2024 proven. 21 refuted. 0 times theorem prover too weak. 2521 trivial. 0 not checked. [2024-10-10 22:07:47,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:07:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4545 trivial. 0 not checked. [2024-10-10 22:07:47,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087233021] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:07:47,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:07:47,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2024-10-10 22:07:47,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068834410] [2024-10-10 22:07:47,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:07:47,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-10 22:07:47,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:07:47,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-10 22:07:47,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2024-10-10 22:07:47,810 INFO L87 Difference]: Start difference. First operand 144 states and 202 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:07:47,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:07:47,858 INFO L93 Difference]: Finished difference Result 283 states and 407 transitions. [2024-10-10 22:07:47,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-10 22:07:47,858 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 205 [2024-10-10 22:07:47,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:07:47,859 INFO L225 Difference]: With dead ends: 283 [2024-10-10 22:07:47,859 INFO L226 Difference]: Without dead ends: 153 [2024-10-10 22:07:47,861 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2024-10-10 22:07:47,861 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:07:47,861 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:07:47,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-10-10 22:07:47,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2024-10-10 22:07:47,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.385135135135135) internal successors, (205), 148 states have internal predecessors, (205), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:07:47,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 211 transitions. [2024-10-10 22:07:47,871 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 211 transitions. Word has length 205 [2024-10-10 22:07:47,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:07:47,872 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 211 transitions. [2024-10-10 22:07:47,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:07:47,872 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 211 transitions. [2024-10-10 22:07:47,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2024-10-10 22:07:47,874 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:07:47,874 INFO L215 NwaCegarLoop]: trace histogram [54, 54, 54, 14, 13, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:07:47,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-10 22:07:48,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-10 22:07:48,075 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:07:48,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:07:48,075 INFO L85 PathProgramCache]: Analyzing trace with hash -535079192, now seen corresponding path program 7 times [2024-10-10 22:07:48,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:07:48,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132530682] [2024-10-10 22:07:48,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:07:48,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:07:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:48,516 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-10 22:07:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:48,530 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-10 22:07:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:48,544 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2024-10-10 22:07:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:48,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-10 22:07:48,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:07:48,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132530682] [2024-10-10 22:07:48,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132530682] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:07:48,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641879982] [2024-10-10 22:07:48,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-10 22:07:48,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:07:48,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:07:48,564 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:07:48,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-10 22:07:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:48,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-10 22:07:48,772 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:07:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-10 22:07:48,804 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:07:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-10 22:07:49,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641879982] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:07:49,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:07:49,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 31 [2024-10-10 22:07:49,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671173528] [2024-10-10 22:07:49,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:07:49,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-10 22:07:49,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:07:49,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-10 22:07:49,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2024-10-10 22:07:49,081 INFO L87 Difference]: Start difference. First operand 153 states and 211 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 22:07:49,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:07:49,126 INFO L93 Difference]: Finished difference Result 306 states and 436 transitions. [2024-10-10 22:07:49,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-10 22:07:49,127 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 214 [2024-10-10 22:07:49,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:07:49,128 INFO L225 Difference]: With dead ends: 306 [2024-10-10 22:07:49,128 INFO L226 Difference]: Without dead ends: 168 [2024-10-10 22:07:49,129 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2024-10-10 22:07:49,129 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:07:49,129 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 186 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:07:49,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-10-10 22:07:49,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2024-10-10 22:07:49,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.3496932515337423) internal successors, (220), 163 states have internal predecessors, (220), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:07:49,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 226 transitions. [2024-10-10 22:07:49,138 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 226 transitions. Word has length 214 [2024-10-10 22:07:49,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:07:49,139 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 226 transitions. [2024-10-10 22:07:49,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 22:07:49,139 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 226 transitions. [2024-10-10 22:07:49,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2024-10-10 22:07:49,141 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:07:49,141 INFO L215 NwaCegarLoop]: trace histogram [54, 54, 54, 28, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:07:49,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-10 22:07:49,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-10 22:07:49,346 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:07:49,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:07:49,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1019729855, now seen corresponding path program 8 times [2024-10-10 22:07:49,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:07:49,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274185118] [2024-10-10 22:07:49,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:07:49,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:07:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:50,214 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-10 22:07:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:50,225 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-10-10 22:07:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:50,236 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2024-10-10 22:07:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:50,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-10 22:07:50,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:07:50,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274185118] [2024-10-10 22:07:50,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274185118] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:07:50,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200827700] [2024-10-10 22:07:50,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:07:50,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:07:50,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:07:50,250 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:07:50,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-10 22:07:50,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:07:50,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:07:50,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-10 22:07:50,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:07:50,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-10 22:07:50,538 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:07:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-10 22:07:51,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200827700] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:07:51,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:07:51,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 31] total 61 [2024-10-10 22:07:51,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265959924] [2024-10-10 22:07:51,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:07:51,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-10-10 22:07:51,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:07:51,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-10-10 22:07:51,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2024-10-10 22:07:51,561 INFO L87 Difference]: Start difference. First operand 168 states and 226 transitions. Second operand has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 22:07:51,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:07:51,627 INFO L93 Difference]: Finished difference Result 336 states and 481 transitions. [2024-10-10 22:07:51,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-10-10 22:07:51,628 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 229 [2024-10-10 22:07:51,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:07:51,629 INFO L225 Difference]: With dead ends: 336 [2024-10-10 22:07:51,629 INFO L226 Difference]: Without dead ends: 198 [2024-10-10 22:07:51,630 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2024-10-10 22:07:51,630 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:07:51,631 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 163 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:07:51,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-10-10 22:07:51,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2024-10-10 22:07:51,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.2953367875647668) internal successors, (250), 193 states have internal predecessors, (250), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:07:51,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 256 transitions. [2024-10-10 22:07:51,639 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 256 transitions. Word has length 229 [2024-10-10 22:07:51,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:07:51,639 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 256 transitions. [2024-10-10 22:07:51,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 22:07:51,639 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 256 transitions. [2024-10-10 22:07:51,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2024-10-10 22:07:51,641 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:07:51,641 INFO L215 NwaCegarLoop]: trace histogram [58, 54, 54, 54, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:07:51,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-10 22:07:51,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:07:51,842 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:07:51,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:07:51,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1369875297, now seen corresponding path program 9 times [2024-10-10 22:07:51,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:07:51,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589502777] [2024-10-10 22:07:51,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:07:51,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:07:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:54,163 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-10 22:07:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:54,174 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2024-10-10 22:07:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:54,182 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2024-10-10 22:07:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-10 22:07:54,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:07:54,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589502777] [2024-10-10 22:07:54,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589502777] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:07:54,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529219559] [2024-10-10 22:07:54,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:07:54,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:07:54,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:07:54,195 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:07:54,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-10 22:07:55,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-10-10 22:07:55,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:07:55,215 INFO L255 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-10 22:07:55,219 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:07:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 2024 proven. 105 refuted. 0 times theorem prover too weak. 4154 trivial. 0 not checked. [2024-10-10 22:07:55,631 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:07:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 6178 trivial. 0 not checked. [2024-10-10 22:07:56,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529219559] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:07:56,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:07:56,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 17, 17] total 91 [2024-10-10 22:07:56,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829821867] [2024-10-10 22:07:56,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:07:56,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-10-10 22:07:56,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:07:56,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-10-10 22:07:56,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2325, Invalid=5865, Unknown=0, NotChecked=0, Total=8190 [2024-10-10 22:07:56,268 INFO L87 Difference]: Start difference. First operand 198 states and 256 transitions. Second operand has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:07:56,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:07:56,395 INFO L93 Difference]: Finished difference Result 353 states and 485 transitions. [2024-10-10 22:07:56,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-10-10 22:07:56,395 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 259 [2024-10-10 22:07:56,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:07:56,396 INFO L225 Difference]: With dead ends: 353 [2024-10-10 22:07:56,396 INFO L226 Difference]: Without dead ends: 215 [2024-10-10 22:07:56,398 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2325, Invalid=5865, Unknown=0, NotChecked=0, Total=8190 [2024-10-10 22:07:56,398 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:07:56,399 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 275 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:07:56,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-10-10 22:07:56,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2024-10-10 22:07:56,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.2714285714285714) internal successors, (267), 210 states have internal predecessors, (267), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:07:56,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 273 transitions. [2024-10-10 22:07:56,406 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 273 transitions. Word has length 259 [2024-10-10 22:07:56,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:07:56,406 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 273 transitions. [2024-10-10 22:07:56,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:07:56,407 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 273 transitions. [2024-10-10 22:07:56,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2024-10-10 22:07:56,408 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:07:56,408 INFO L215 NwaCegarLoop]: trace histogram [59, 54, 54, 54, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:07:56,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-10 22:07:56,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:07:56,613 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:07:56,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:07:56,613 INFO L85 PathProgramCache]: Analyzing trace with hash -692372472, now seen corresponding path program 10 times [2024-10-10 22:07:56,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:07:56,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431178806] [2024-10-10 22:07:56,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:07:56,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:07:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:59,109 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-10-10 22:07:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:59,124 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2024-10-10 22:07:59,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:59,137 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2024-10-10 22:07:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:07:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 4932 trivial. 0 not checked. [2024-10-10 22:07:59,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:07:59,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431178806] [2024-10-10 22:07:59,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431178806] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:07:59,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831617013] [2024-10-10 22:07:59,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:07:59,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:07:59,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:07:59,158 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:07:59,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-10 22:07:59,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:07:59,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:07:59,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 1470 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-10 22:07:59,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:08:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 2022 proven. 477 refuted. 0 times theorem prover too weak. 4203 trivial. 0 not checked. [2024-10-10 22:08:00,018 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:08:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 2022 proven. 477 refuted. 0 times theorem prover too weak. 4203 trivial. 0 not checked. [2024-10-10 22:08:00,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831617013] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:08:00,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:08:00,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 21, 21] total 100 [2024-10-10 22:08:00,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090087063] [2024-10-10 22:08:00,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:08:00,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2024-10-10 22:08:00,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:08:00,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2024-10-10 22:08:00,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2024-10-10 22:08:00,814 INFO L87 Difference]: Start difference. First operand 215 states and 273 transitions. Second operand has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:08:01,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:08:01,067 INFO L93 Difference]: Finished difference Result 490 states and 689 transitions. [2024-10-10 22:08:01,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-10-10 22:08:01,068 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 276 [2024-10-10 22:08:01,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:08:01,069 INFO L225 Difference]: With dead ends: 490 [2024-10-10 22:08:01,070 INFO L226 Difference]: Without dead ends: 336 [2024-10-10 22:08:01,072 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2242 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2024-10-10 22:08:01,073 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 718 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:08:01,073 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 476 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:08:01,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2024-10-10 22:08:01,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2024-10-10 22:08:01,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 331 states have (on average 1.353474320241692) internal successors, (448), 331 states have internal predecessors, (448), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:08:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 454 transitions. [2024-10-10 22:08:01,081 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 454 transitions. Word has length 276 [2024-10-10 22:08:01,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:08:01,082 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 454 transitions. [2024-10-10 22:08:01,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:08:01,082 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 454 transitions. [2024-10-10 22:08:01,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2024-10-10 22:08:01,087 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:08:01,087 INFO L215 NwaCegarLoop]: trace histogram [114, 114, 114, 60, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:08:01,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-10 22:08:01,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-10 22:08:01,288 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:08:01,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:08:01,289 INFO L85 PathProgramCache]: Analyzing trace with hash -2119612289, now seen corresponding path program 11 times [2024-10-10 22:08:01,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:08:01,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033897908] [2024-10-10 22:08:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:08:01,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:08:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:08:03,936 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-10 22:08:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:08:03,955 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2024-10-10 22:08:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:08:03,974 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 335 [2024-10-10 22:08:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:08:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 21972 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 20142 trivial. 0 not checked. [2024-10-10 22:08:03,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:08:03,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033897908] [2024-10-10 22:08:03,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033897908] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:08:03,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982433464] [2024-10-10 22:08:03,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 22:08:03,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:08:03,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:08:03,998 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:08:04,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process