./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/nsqm.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/nsqm.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b64d5f0150faeb5d8c80a790953ff0d0f860fa8f91611b25d82154854354bbd0 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 02:54:50,804 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 02:54:50,858 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 02:54:50,862 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 02:54:50,862 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 02:54:50,891 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 02:54:50,891 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 02:54:50,892 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 02:54:50,893 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 02:54:50,893 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 02:54:50,893 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 02:54:50,894 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 02:54:50,894 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 02:54:50,896 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 02:54:50,896 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 02:54:50,897 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 02:54:50,897 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 02:54:50,897 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 02:54:50,897 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 02:54:50,897 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 02:54:50,898 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 02:54:50,901 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 02:54:50,901 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 02:54:50,901 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 02:54:50,902 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 02:54:50,902 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 02:54:50,902 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 02:54:50,902 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 02:54:50,902 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 02:54:50,902 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 02:54:50,903 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 02:54:50,903 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 02:54:50,903 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:54:50,903 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 02:54:50,903 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 02:54:50,903 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 02:54:50,903 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 02:54:50,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 02:54:50,904 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 02:54:50,904 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 02:54:50,904 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 02:54:50,904 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 02:54:50,905 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b64d5f0150faeb5d8c80a790953ff0d0f860fa8f91611b25d82154854354bbd0 [2024-11-16 02:54:51,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 02:54:51,168 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 02:54:51,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 02:54:51,173 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 02:54:51,173 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 02:54:51,174 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/nsqm.c [2024-11-16 02:54:52,426 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 02:54:52,608 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 02:54:52,608 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm.c [2024-11-16 02:54:52,616 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4de12d653/77523263fb4344dcbb52853b17205703/FLAG8e180eef6 [2024-11-16 02:54:52,632 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4de12d653/77523263fb4344dcbb52853b17205703 [2024-11-16 02:54:52,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 02:54:52,636 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 02:54:52,638 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 02:54:52,639 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 02:54:52,643 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 02:54:52,644 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:54:52" (1/1) ... [2024-11-16 02:54:52,644 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e65030c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:54:52, skipping insertion in model container [2024-11-16 02:54:52,644 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:54:52" (1/1) ... [2024-11-16 02:54:52,663 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 02:54:52,850 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm.c[587,600] [2024-11-16 02:54:52,871 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:54:52,878 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 02:54:52,891 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm.c[587,600] [2024-11-16 02:54:52,901 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:54:52,921 INFO L204 MainTranslator]: Completed translation [2024-11-16 02:54:52,921 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:54:52 WrapperNode [2024-11-16 02:54:52,921 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 02:54:52,922 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 02:54:52,923 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 02:54:52,923 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 02:54:52,930 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:54:52" (1/1) ... [2024-11-16 02:54:52,941 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:54:52" (1/1) ... [2024-11-16 02:54:52,966 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2024-11-16 02:54:52,969 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 02:54:52,970 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 02:54:52,970 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 02:54:52,970 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 02:54:52,979 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:54:52" (1/1) ... [2024-11-16 02:54:52,980 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:54:52" (1/1) ... [2024-11-16 02:54:52,983 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:54:52" (1/1) ... [2024-11-16 02:54:53,002 INFO L175 MemorySlicer]: Split 17 memory accesses to 4 slices as follows [2, 7, 4, 4]. 41 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0]. The 4 writes are split as follows [0, 0, 2, 2]. [2024-11-16 02:54:53,003 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:54:52" (1/1) ... [2024-11-16 02:54:53,003 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:54:52" (1/1) ... [2024-11-16 02:54:53,012 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:54:52" (1/1) ... [2024-11-16 02:54:53,013 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:54:52" (1/1) ... [2024-11-16 02:54:53,014 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:54:52" (1/1) ... [2024-11-16 02:54:53,015 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:54:52" (1/1) ... [2024-11-16 02:54:53,017 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 02:54:53,019 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 02:54:53,020 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 02:54:53,020 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 02:54:53,021 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:54:52" (1/1) ... [2024-11-16 02:54:53,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:54:53,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:54:53,054 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 02:54:53,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 02:54:53,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 02:54:53,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 02:54:53,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 02:54:53,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 02:54:53,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-16 02:54:53,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 02:54:53,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 02:54:53,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 02:54:53,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-16 02:54:53,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-16 02:54:53,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 02:54:53,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 02:54:53,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 02:54:53,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 02:54:53,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 02:54:53,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-16 02:54:53,167 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 02:54:53,169 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 02:54:53,338 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-16 02:54:53,339 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 02:54:53,350 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 02:54:53,351 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 02:54:53,352 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:54:53 BoogieIcfgContainer [2024-11-16 02:54:53,352 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 02:54:53,355 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 02:54:53,356 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 02:54:53,358 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 02:54:53,359 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 02:54:52" (1/3) ... [2024-11-16 02:54:53,359 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f84aa04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:54:53, skipping insertion in model container [2024-11-16 02:54:53,359 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:54:52" (2/3) ... [2024-11-16 02:54:53,359 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f84aa04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:54:53, skipping insertion in model container [2024-11-16 02:54:53,360 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:54:53" (3/3) ... [2024-11-16 02:54:53,360 INFO L112 eAbstractionObserver]: Analyzing ICFG nsqm.c [2024-11-16 02:54:53,376 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 02:54:53,376 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 02:54:53,426 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 02:54:53,433 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;@2b74707a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 02:54:53,434 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 02:54:53,439 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:53,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-16 02:54:53,445 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:54:53,446 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:54:53,446 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:54:53,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:54:53,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1288971921, now seen corresponding path program 1 times [2024-11-16 02:54:53,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:54:53,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173513692] [2024-11-16 02:54:53,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:54:53,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:54:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:54:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:54:53,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:54:53,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173513692] [2024-11-16 02:54:53,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173513692] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:54:53,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:54:53,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 02:54:53,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019181878] [2024-11-16 02:54:53,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:54:53,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 02:54:53,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:54:53,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 02:54:53,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 02:54:53,657 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:53,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:54:53,669 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2024-11-16 02:54:53,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 02:54:53,670 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-16 02:54:53,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:54:53,675 INFO L225 Difference]: With dead ends: 41 [2024-11-16 02:54:53,676 INFO L226 Difference]: Without dead ends: 18 [2024-11-16 02:54:53,678 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 02:54:53,680 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:54:53,681 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:54:53,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-16 02:54:53,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-16 02:54:53,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:53,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2024-11-16 02:54:53,707 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2024-11-16 02:54:53,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:54:53,707 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2024-11-16 02:54:53,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:53,707 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2024-11-16 02:54:53,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-16 02:54:53,708 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:54:53,708 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:54:53,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 02:54:53,708 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:54:53,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:54:53,709 INFO L85 PathProgramCache]: Analyzing trace with hash 818678700, now seen corresponding path program 1 times [2024-11-16 02:54:53,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:54:53,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123804349] [2024-11-16 02:54:53,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:54:53,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:54:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 02:54:53,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047722422] [2024-11-16 02:54:53,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:54:53,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:54:53,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:54:53,759 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:54:53,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 02:54:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:54:53,840 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-16 02:54:53,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:54:53,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-16 02:54:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:54:53,988 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 02:54:53,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:54:53,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123804349] [2024-11-16 02:54:53,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 02:54:53,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047722422] [2024-11-16 02:54:53,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047722422] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:54:53,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:54:53,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 02:54:53,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047800783] [2024-11-16 02:54:53,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:54:53,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 02:54:53,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:54:53,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 02:54:53,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 02:54:53,994 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:54,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:54:54,075 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2024-11-16 02:54:54,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 02:54:54,076 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-16 02:54:54,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:54:54,077 INFO L225 Difference]: With dead ends: 35 [2024-11-16 02:54:54,077 INFO L226 Difference]: Without dead ends: 32 [2024-11-16 02:54:54,078 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-16 02:54:54,080 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:54:54,080 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 46 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:54:54,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-16 02:54:54,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2024-11-16 02:54:54,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:54,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-16 02:54:54,090 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2024-11-16 02:54:54,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:54:54,091 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-16 02:54:54,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:54,091 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-16 02:54:54,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-16 02:54:54,091 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:54:54,095 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:54:54,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 02:54:54,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:54:54,296 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:54:54,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:54:54,297 INFO L85 PathProgramCache]: Analyzing trace with hash 922047883, now seen corresponding path program 1 times [2024-11-16 02:54:54,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:54:54,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768089994] [2024-11-16 02:54:54,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:54:54,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:54:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:54:54,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:54:54,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:54:54,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768089994] [2024-11-16 02:54:54,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768089994] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:54:54,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:54:54,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 02:54:54,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309982591] [2024-11-16 02:54:54,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:54:54,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 02:54:54,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:54:54,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 02:54:54,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-16 02:54:54,514 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:54,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:54:54,570 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2024-11-16 02:54:54,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 02:54:54,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-16 02:54:54,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:54:54,571 INFO L225 Difference]: With dead ends: 46 [2024-11-16 02:54:54,571 INFO L226 Difference]: Without dead ends: 36 [2024-11-16 02:54:54,571 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-16 02:54:54,572 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:54:54,572 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 44 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:54:54,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-16 02:54:54,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2024-11-16 02:54:54,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:54,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-11-16 02:54:54,579 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 18 [2024-11-16 02:54:54,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:54:54,579 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-11-16 02:54:54,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:54,579 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-11-16 02:54:54,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-16 02:54:54,582 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:54:54,582 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:54:54,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 02:54:54,582 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:54:54,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:54:54,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1110445517, now seen corresponding path program 1 times [2024-11-16 02:54:54,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:54:54,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669305121] [2024-11-16 02:54:54,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:54:54,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:54:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:54:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:54:54,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:54:54,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669305121] [2024-11-16 02:54:54,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669305121] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:54:54,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149149165] [2024-11-16 02:54:54,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:54:54,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:54:54,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:54:54,722 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:54:54,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 02:54:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:54:54,794 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-16 02:54:54,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:54:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:54:54,877 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 02:54:54,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149149165] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:54:54,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 02:54:54,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2024-11-16 02:54:54,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325718582] [2024-11-16 02:54:54,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:54:54,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 02:54:54,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:54:54,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 02:54:54,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-16 02:54:54,882 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:54,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:54:54,964 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2024-11-16 02:54:54,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 02:54:54,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-16 02:54:54,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:54:54,966 INFO L225 Difference]: With dead ends: 46 [2024-11-16 02:54:54,966 INFO L226 Difference]: Without dead ends: 29 [2024-11-16 02:54:54,967 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-11-16 02:54:54,967 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:54:54,967 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 43 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:54:54,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-16 02:54:54,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2024-11-16 02:54:54,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:54,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2024-11-16 02:54:54,974 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 20 [2024-11-16 02:54:54,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:54:54,974 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2024-11-16 02:54:54,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:54,975 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2024-11-16 02:54:54,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-16 02:54:54,975 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:54:54,975 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:54:54,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 02:54:55,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-16 02:54:55,176 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:54:55,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:54:55,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1582103252, now seen corresponding path program 1 times [2024-11-16 02:54:55,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:54:55,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158445049] [2024-11-16 02:54:55,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:54:55,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:54:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 02:54:55,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820402813] [2024-11-16 02:54:55,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:54:55,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:54:55,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:54:55,231 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:54:55,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 02:54:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:54:55,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-16 02:54:55,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:54:55,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-16 02:54:55,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-16 02:54:55,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:54:55,466 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:54:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:54:55,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:54:55,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158445049] [2024-11-16 02:54:55,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 02:54:55,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820402813] [2024-11-16 02:54:55,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820402813] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:54:55,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 02:54:55,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-16 02:54:55,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939360068] [2024-11-16 02:54:55,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 02:54:55,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-16 02:54:55,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:54:55,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-16 02:54:55,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-16 02:54:55,721 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:55,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:54:55,874 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2024-11-16 02:54:55,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 02:54:55,875 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-16 02:54:55,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:54:55,875 INFO L225 Difference]: With dead ends: 57 [2024-11-16 02:54:55,875 INFO L226 Difference]: Without dead ends: 54 [2024-11-16 02:54:55,876 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-11-16 02:54:55,876 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 46 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:54:55,876 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 84 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:54:55,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-16 02:54:55,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 30. [2024-11-16 02:54:55,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:55,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-11-16 02:54:55,881 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2024-11-16 02:54:55,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:54:55,881 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-11-16 02:54:55,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:55,882 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-11-16 02:54:55,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-16 02:54:55,882 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:54:55,882 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:54:55,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 02:54:56,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:54:56,084 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:54:56,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:54:56,084 INFO L85 PathProgramCache]: Analyzing trace with hash 127806387, now seen corresponding path program 1 times [2024-11-16 02:54:56,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:54:56,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896849468] [2024-11-16 02:54:56,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:54:56,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:54:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 02:54:56,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982056610] [2024-11-16 02:54:56,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:54:56,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:54:56,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:54:56,141 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:54:56,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 02:54:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:54:56,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-16 02:54:56,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:54:56,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:54:56,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-16 02:54:56,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-16 02:54:56,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2024-11-16 02:54:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:54:56,544 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:54:57,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:54:57,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:54:57,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896849468] [2024-11-16 02:54:57,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 02:54:57,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982056610] [2024-11-16 02:54:57,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982056610] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:54:57,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 02:54:57,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2024-11-16 02:54:57,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772525614] [2024-11-16 02:54:57,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 02:54:57,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-16 02:54:57,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:54:57,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-16 02:54:57,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-11-16 02:54:57,010 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:57,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:54:57,576 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2024-11-16 02:54:57,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-16 02:54:57,577 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-16 02:54:57,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:54:57,578 INFO L225 Difference]: With dead ends: 88 [2024-11-16 02:54:57,578 INFO L226 Difference]: Without dead ends: 85 [2024-11-16 02:54:57,579 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2024-11-16 02:54:57,580 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 101 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-16 02:54:57,580 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 159 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-16 02:54:57,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-16 02:54:57,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 52. [2024-11-16 02:54:57,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:57,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2024-11-16 02:54:57,592 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 24 [2024-11-16 02:54:57,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:54:57,592 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2024-11-16 02:54:57,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:57,592 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2024-11-16 02:54:57,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-16 02:54:57,593 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:54:57,593 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:54:57,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-16 02:54:57,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:54:57,798 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:54:57,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:54:57,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1581130454, now seen corresponding path program 2 times [2024-11-16 02:54:57,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:54:57,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833324398] [2024-11-16 02:54:57,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:54:57,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:54:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:54:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:54:57,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:54:57,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833324398] [2024-11-16 02:54:57,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833324398] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:54:57,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175094269] [2024-11-16 02:54:57,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:54:57,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:54:57,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:54:57,945 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:54:57,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 02:54:58,015 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:54:58,015 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:54:58,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 02:54:58,017 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:54:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:54:58,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:54:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:54:58,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175094269] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:54:58,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:54:58,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2024-11-16 02:54:58,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547379155] [2024-11-16 02:54:58,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:54:58,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-16 02:54:58,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:54:58,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-16 02:54:58,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-16 02:54:58,091 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:58,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:54:58,184 INFO L93 Difference]: Finished difference Result 118 states and 133 transitions. [2024-11-16 02:54:58,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 02:54:58,185 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-16 02:54:58,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:54:58,185 INFO L225 Difference]: With dead ends: 118 [2024-11-16 02:54:58,186 INFO L226 Difference]: Without dead ends: 92 [2024-11-16 02:54:58,186 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2024-11-16 02:54:58,186 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:54:58,187 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 95 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:54:58,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-16 02:54:58,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 57. [2024-11-16 02:54:58,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:58,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2024-11-16 02:54:58,195 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 24 [2024-11-16 02:54:58,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:54:58,195 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2024-11-16 02:54:58,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:58,196 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2024-11-16 02:54:58,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-16 02:54:58,196 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:54:58,196 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:54:58,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-16 02:54:58,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:54:58,397 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:54:58,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:54:58,397 INFO L85 PathProgramCache]: Analyzing trace with hash -234123253, now seen corresponding path program 3 times [2024-11-16 02:54:58,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:54:58,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804262956] [2024-11-16 02:54:58,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:54:58,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:54:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:54:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:54:58,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:54:58,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804262956] [2024-11-16 02:54:58,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804262956] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:54:58,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033792179] [2024-11-16 02:54:58,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:54:58,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:54:58,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:54:58,524 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:54:58,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 02:54:58,726 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-16 02:54:58,726 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:54:58,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-16 02:54:58,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:54:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:54:58,789 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:54:58,839 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:54:58,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033792179] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:54:58,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:54:58,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-16 02:54:58,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587243495] [2024-11-16 02:54:58,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:54:58,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-16 02:54:58,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:54:58,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-16 02:54:58,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-16 02:54:58,842 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:58,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:54:58,972 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2024-11-16 02:54:58,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-16 02:54:58,973 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-16 02:54:58,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:54:58,973 INFO L225 Difference]: With dead ends: 105 [2024-11-16 02:54:58,973 INFO L226 Difference]: Without dead ends: 85 [2024-11-16 02:54:58,974 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2024-11-16 02:54:58,975 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 83 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:54:58,975 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 102 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:54:58,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-16 02:54:58,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 49. [2024-11-16 02:54:58,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:58,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2024-11-16 02:54:58,982 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 26 [2024-11-16 02:54:58,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:54:58,982 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2024-11-16 02:54:58,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:58,982 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2024-11-16 02:54:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-16 02:54:58,983 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:54:58,983 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:54:58,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-16 02:54:59,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:54:59,184 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:54:59,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:54:59,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1628129606, now seen corresponding path program 2 times [2024-11-16 02:54:59,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:54:59,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707845867] [2024-11-16 02:54:59,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:54:59,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:54:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:54:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:54:59,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:54:59,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707845867] [2024-11-16 02:54:59,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707845867] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:54:59,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300572416] [2024-11-16 02:54:59,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:54:59,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:54:59,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:54:59,273 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:54:59,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 02:54:59,331 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:54:59,332 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:54:59,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-16 02:54:59,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:54:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:54:59,397 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:54:59,445 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:54:59,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300572416] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:54:59,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:54:59,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-11-16 02:54:59,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486588776] [2024-11-16 02:54:59,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:54:59,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 02:54:59,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:54:59,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 02:54:59,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-11-16 02:54:59,447 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:59,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:54:59,532 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2024-11-16 02:54:59,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 02:54:59,533 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-16 02:54:59,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:54:59,533 INFO L225 Difference]: With dead ends: 97 [2024-11-16 02:54:59,533 INFO L226 Difference]: Without dead ends: 74 [2024-11-16 02:54:59,534 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-11-16 02:54:59,535 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 30 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:54:59,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 99 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:54:59,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-16 02:54:59,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 54. [2024-11-16 02:54:59,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:59,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2024-11-16 02:54:59,542 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 28 [2024-11-16 02:54:59,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:54:59,542 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2024-11-16 02:54:59,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:54:59,542 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2024-11-16 02:54:59,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-16 02:54:59,543 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:54:59,543 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:54:59,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-16 02:54:59,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:54:59,744 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:54:59,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:54:59,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1131389643, now seen corresponding path program 3 times [2024-11-16 02:54:59,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:54:59,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970978607] [2024-11-16 02:54:59,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:54:59,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:54:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:54:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-16 02:54:59,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:54:59,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970978607] [2024-11-16 02:54:59,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970978607] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:54:59,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509969375] [2024-11-16 02:54:59,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:54:59,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:54:59,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:54:59,866 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:54:59,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-16 02:54:59,958 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-16 02:54:59,959 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:54:59,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 02:54:59,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:55:00,011 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-16 02:55:00,011 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:55:00,053 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-16 02:55:00,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509969375] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:55:00,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:55:00,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-11-16 02:55:00,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614965626] [2024-11-16 02:55:00,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:55:00,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 02:55:00,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:55:00,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 02:55:00,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-16 02:55:00,055 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:00,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:55:00,237 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2024-11-16 02:55:00,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-16 02:55:00,238 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-16 02:55:00,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:55:00,238 INFO L225 Difference]: With dead ends: 88 [2024-11-16 02:55:00,239 INFO L226 Difference]: Without dead ends: 69 [2024-11-16 02:55:00,239 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2024-11-16 02:55:00,240 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 74 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:55:00,240 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 146 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:55:00,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-16 02:55:00,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 45. [2024-11-16 02:55:00,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:00,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2024-11-16 02:55:00,246 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 28 [2024-11-16 02:55:00,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:55:00,246 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2024-11-16 02:55:00,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:00,246 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2024-11-16 02:55:00,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-16 02:55:00,246 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:55:00,246 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:55:00,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-16 02:55:00,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-16 02:55:00,447 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:55:00,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:55:00,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1454640812, now seen corresponding path program 4 times [2024-11-16 02:55:00,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:55:00,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2975870] [2024-11-16 02:55:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:55:00,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:55:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 02:55:00,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676974611] [2024-11-16 02:55:00,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 02:55:00,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:55:00,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:55:00,488 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:55:00,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-16 02:55:00,780 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 02:55:00,780 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:55:00,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-16 02:55:00,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:55:00,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-16 02:55:00,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-16 02:55:00,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-16 02:55:00,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-16 02:55:00,885 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 02:55:00,885 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:55:13,334 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse12 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse10 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse0 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296)) (.cse8 (* .cse12 8))) (let ((.cse7 (< 2147483647 .cse12)) (.cse1 (select |c_#memory_int#3| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse2 (+ .cse8 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse9 (* .cse0 8)) (.cse4 (+ (* 8 .cse10) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse5 (+ c_~N~0 1)) (.cse6 (< .cse12 2147483648))) (and (or (< 2147483647 .cse0) (let ((.cse3 (+ .cse9 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (or (forall ((v_DerPreprocessor_16 Int) (v_DerPreprocessor_8 Int) (v_DerPreprocessor_5 Int)) (= (select (store (store (store .cse1 .cse2 v_DerPreprocessor_16) .cse3 v_DerPreprocessor_8) .cse4 v_DerPreprocessor_5) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse5)) .cse6) (or .cse7 (forall ((v_DerPreprocessor_15 Int) (v_DerPreprocessor_8 Int) (v_DerPreprocessor_5 Int)) (= (select (store (store (store .cse1 (+ .cse8 |c_ULTIMATE.start_main_~a~0#1.offset|) v_DerPreprocessor_15) .cse3 v_DerPreprocessor_8) .cse4 v_DerPreprocessor_5) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse5)))))) (or (< .cse10 2147483648) (let ((.cse11 (= (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse5))) (and (or .cse11 .cse7) (or .cse11 .cse6)))) (or (forall ((v_DerPreprocessor_13 Int) (v_DerPreprocessor_7 Int) (v_DerPreprocessor_5 Int)) (= (select (store (store (store .cse1 .cse2 v_DerPreprocessor_13) (+ .cse9 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_DerPreprocessor_7) .cse4 v_DerPreprocessor_5) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse5)) (< .cse0 2147483648) .cse6))))) is different from false [2024-11-16 02:55:21,461 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse7 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse10 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse0 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296)) (.cse8 (* .cse7 8))) (let ((.cse1 (select |c_#memory_int#3| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse2 (+ .cse8 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse9 (* .cse0 8)) (.cse4 (+ (* 8 .cse10) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse5 (+ c_~N~0 1)) (.cse6 (< .cse7 2147483648))) (and (or (< 2147483647 .cse0) (let ((.cse3 (+ .cse9 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (or (forall ((v_DerPreprocessor_16 Int) (v_DerPreprocessor_8 Int) (v_DerPreprocessor_5 Int)) (= (select (store (store (store .cse1 .cse2 v_DerPreprocessor_16) .cse3 v_DerPreprocessor_8) .cse4 v_DerPreprocessor_5) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse5)) .cse6) (or (< 2147483647 .cse7) (forall ((v_DerPreprocessor_15 Int) (v_DerPreprocessor_8 Int) (v_DerPreprocessor_5 Int)) (= (select (store (store (store .cse1 (+ .cse8 |c_ULTIMATE.start_main_~a~0#1.offset|) v_DerPreprocessor_15) .cse3 v_DerPreprocessor_8) .cse4 v_DerPreprocessor_5) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse5)))))) (or (< .cse10 2147483648) (= (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse5)) (or (forall ((v_DerPreprocessor_13 Int) (v_DerPreprocessor_7 Int) (v_DerPreprocessor_5 Int)) (= (select (store (store (store .cse1 .cse2 v_DerPreprocessor_13) (+ .cse9 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_DerPreprocessor_7) .cse4 v_DerPreprocessor_5) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse5)) (< .cse0 2147483648) .cse6))))) is different from false [2024-11-16 02:55:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 6 not checked. [2024-11-16 02:55:21,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:55:21,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2975870] [2024-11-16 02:55:21,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 02:55:21,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676974611] [2024-11-16 02:55:21,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676974611] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:55:21,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 02:55:21,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2024-11-16 02:55:21,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738003241] [2024-11-16 02:55:21,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 02:55:21,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-16 02:55:21,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:55:21,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-16 02:55:21,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=98, Unknown=2, NotChecked=42, Total=182 [2024-11-16 02:55:21,492 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:21,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:55:21,943 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2024-11-16 02:55:21,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 02:55:21,943 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-16 02:55:21,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:55:21,944 INFO L225 Difference]: With dead ends: 105 [2024-11-16 02:55:21,944 INFO L226 Difference]: Without dead ends: 102 [2024-11-16 02:55:21,944 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=47, Invalid=115, Unknown=2, NotChecked=46, Total=210 [2024-11-16 02:55:21,945 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 66 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-16 02:55:21,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 183 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 145 Invalid, 0 Unknown, 176 Unchecked, 0.4s Time] [2024-11-16 02:55:21,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-16 02:55:21,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 52. [2024-11-16 02:55:21,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 51 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:21,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2024-11-16 02:55:21,956 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 28 [2024-11-16 02:55:21,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:55:21,956 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2024-11-16 02:55:21,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:21,957 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2024-11-16 02:55:21,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-16 02:55:21,959 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:55:21,959 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:55:21,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-16 02:55:22,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:55:22,163 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:55:22,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:55:22,163 INFO L85 PathProgramCache]: Analyzing trace with hash -251684934, now seen corresponding path program 4 times [2024-11-16 02:55:22,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:55:22,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496321270] [2024-11-16 02:55:22,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:55:22,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:55:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 02:55:22,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86138522] [2024-11-16 02:55:22,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 02:55:22,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:55:22,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:55:22,238 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:55:22,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-16 02:55:22,393 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 02:55:22,393 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:55:22,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-16 02:55:22,399 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:55:22,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:55:22,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-16 02:55:22,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-16 02:55:22,517 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:55:22,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2024-11-16 02:55:22,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2024-11-16 02:55:22,680 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:55:22,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 34 [2024-11-16 02:55:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:55:22,968 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:55:43,400 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-16 02:56:12,547 WARN L286 SmtUtils]: Spent 24.20s on a formula simplification. DAG size of input: 87 DAG size of output: 84 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-16 02:56:20,623 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-16 02:56:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:56:24,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:56:24,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496321270] [2024-11-16 02:56:24,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 02:56:24,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86138522] [2024-11-16 02:56:24,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86138522] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:56:24,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 02:56:24,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2024-11-16 02:56:24,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087230993] [2024-11-16 02:56:24,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 02:56:24,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-16 02:56:24,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:56:24,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-16 02:56:24,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2024-11-16 02:56:24,669 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:56:29,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-16 02:56:30,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:56:30,451 INFO L93 Difference]: Finished difference Result 162 states and 178 transitions. [2024-11-16 02:56:30,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-16 02:56:30,452 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-16 02:56:30,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:56:30,455 INFO L225 Difference]: With dead ends: 162 [2024-11-16 02:56:30,455 INFO L226 Difference]: Without dead ends: 159 [2024-11-16 02:56:30,459 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=442, Invalid=2108, Unknown=0, NotChecked=0, Total=2550 [2024-11-16 02:56:30,459 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 262 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-16 02:56:30,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 281 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-16 02:56:30,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-16 02:56:30,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 89. [2024-11-16 02:56:30,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1818181818181819) internal successors, (104), 88 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:56:30,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 104 transitions. [2024-11-16 02:56:30,479 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 104 transitions. Word has length 32 [2024-11-16 02:56:30,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:56:30,480 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 104 transitions. [2024-11-16 02:56:30,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:56:30,480 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 104 transitions. [2024-11-16 02:56:30,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-16 02:56:30,481 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:56:30,481 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:56:30,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-16 02:56:30,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-16 02:56:30,682 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:56:30,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:56:30,682 INFO L85 PathProgramCache]: Analyzing trace with hash -47142647, now seen corresponding path program 5 times [2024-11-16 02:56:30,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:56:30,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648051731] [2024-11-16 02:56:30,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:56:30,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:56:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:56:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:56:30,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:56:30,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648051731] [2024-11-16 02:56:30,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648051731] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:56:30,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253748772] [2024-11-16 02:56:30,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 02:56:30,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:56:30,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:56:30,922 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:56:30,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process