./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_vector_difference_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/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-examples/standard_vector_difference_ground.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7263b2c7ab28b481620789bcaa79c3e966cab937e9920a12d1160d17415db571 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-21 20:40:16,460 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-21 20:40:16,520 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-21 20:40:16,526 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-21 20:40:16,527 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-21 20:40:16,557 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-21 20:40:16,558 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-21 20:40:16,558 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-21 20:40:16,559 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-21 20:40:16,563 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-21 20:40:16,564 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-21 20:40:16,564 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-21 20:40:16,565 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-21 20:40:16,565 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-21 20:40:16,565 INFO L153 SettingsManager]: * Use SBE=true [2024-11-21 20:40:16,565 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-21 20:40:16,566 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-21 20:40:16,566 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-21 20:40:16,566 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-21 20:40:16,566 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-21 20:40:16,566 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-21 20:40:16,567 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-21 20:40:16,567 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-21 20:40:16,567 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-21 20:40:16,567 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-21 20:40:16,568 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-21 20:40:16,568 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-21 20:40:16,568 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-21 20:40:16,568 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-21 20:40:16,569 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-21 20:40:16,569 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-21 20:40:16,569 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-21 20:40:16,569 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 20:40:16,569 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-21 20:40:16,570 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-21 20:40:16,570 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-21 20:40:16,572 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-21 20:40:16,572 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-21 20:40:16,573 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-21 20:40:16,573 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-21 20:40:16,573 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-21 20:40:16,573 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-21 20:40:16,573 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7263b2c7ab28b481620789bcaa79c3e966cab937e9920a12d1160d17415db571 [2024-11-21 20:40:16,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-21 20:40:16,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-21 20:40:16,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-21 20:40:16,880 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-21 20:40:16,881 INFO L274 PluginConnector]: CDTParser initialized [2024-11-21 20:40:16,882 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_vector_difference_ground.i [2024-11-21 20:40:18,235 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-21 20:40:18,439 INFO L384 CDTParser]: Found 1 translation units. [2024-11-21 20:40:18,441 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_vector_difference_ground.i [2024-11-21 20:40:18,450 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f37dff23/ab1545ac7b144072bb4ffc82fd7004b2/FLAGcd9490270 [2024-11-21 20:40:18,469 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f37dff23/ab1545ac7b144072bb4ffc82fd7004b2 [2024-11-21 20:40:18,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-21 20:40:18,473 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-21 20:40:18,475 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-21 20:40:18,475 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-21 20:40:18,480 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-21 20:40:18,480 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:40:18" (1/1) ... [2024-11-21 20:40:18,483 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@186cec3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:40:18, skipping insertion in model container [2024-11-21 20:40:18,518 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:40:18" (1/1) ... [2024-11-21 20:40:18,550 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-21 20:40:18,752 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-examples/standard_vector_difference_ground.i[826,839] [2024-11-21 20:40:18,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 20:40:18,785 INFO L200 MainTranslator]: Completed pre-run [2024-11-21 20:40:18,799 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-examples/standard_vector_difference_ground.i[826,839] [2024-11-21 20:40:18,807 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 20:40:18,824 INFO L204 MainTranslator]: Completed translation [2024-11-21 20:40:18,825 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:40:18 WrapperNode [2024-11-21 20:40:18,825 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-21 20:40:18,827 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-21 20:40:18,827 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-21 20:40:18,828 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-21 20:40:18,835 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:40:18" (1/1) ... [2024-11-21 20:40:18,841 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:40:18" (1/1) ... [2024-11-21 20:40:18,857 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 74 [2024-11-21 20:40:18,858 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-21 20:40:18,858 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-21 20:40:18,858 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-21 20:40:18,859 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-21 20:40:18,867 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:40:18" (1/1) ... [2024-11-21 20:40:18,868 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:40:18" (1/1) ... [2024-11-21 20:40:18,870 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:40:18" (1/1) ... [2024-11-21 20:40:18,888 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 2, 3, 3]. 30 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-11-21 20:40:18,888 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:40:18" (1/1) ... [2024-11-21 20:40:18,889 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:40:18" (1/1) ... [2024-11-21 20:40:18,898 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:40:18" (1/1) ... [2024-11-21 20:40:18,900 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:40:18" (1/1) ... [2024-11-21 20:40:18,901 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:40:18" (1/1) ... [2024-11-21 20:40:18,902 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:40:18" (1/1) ... [2024-11-21 20:40:18,904 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-21 20:40:18,905 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-21 20:40:18,905 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-21 20:40:18,905 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-21 20:40:18,906 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:40:18" (1/1) ... [2024-11-21 20:40:18,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 20:40:18,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:40:18,945 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) [2024-11-21 20:40:18,953 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 [2024-11-21 20:40:18,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-21 20:40:18,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-21 20:40:19,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-21 20:40:19,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-21 20:40:19,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-21 20:40:19,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-21 20:40:19,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-21 20:40:19,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-21 20:40:19,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-21 20:40:19,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-21 20:40:19,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-21 20:40:19,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-21 20:40:19,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-21 20:40:19,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-21 20:40:19,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-21 20:40:19,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-21 20:40:19,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-21 20:40:19,105 INFO L238 CfgBuilder]: Building ICFG [2024-11-21 20:40:19,108 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-21 20:40:19,284 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-21 20:40:19,285 INFO L287 CfgBuilder]: Performing block encoding [2024-11-21 20:40:19,300 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-21 20:40:19,301 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-21 20:40:19,301 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:40:19 BoogieIcfgContainer [2024-11-21 20:40:19,301 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-21 20:40:19,304 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-21 20:40:19,304 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-21 20:40:19,307 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-21 20:40:19,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 08:40:18" (1/3) ... [2024-11-21 20:40:19,309 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc6de28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:40:19, skipping insertion in model container [2024-11-21 20:40:19,309 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:40:18" (2/3) ... [2024-11-21 20:40:19,310 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc6de28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:40:19, skipping insertion in model container [2024-11-21 20:40:19,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:40:19" (3/3) ... [2024-11-21 20:40:19,311 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_vector_difference_ground.i [2024-11-21 20:40:19,328 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-21 20:40:19,328 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-21 20:40:19,390 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-21 20:40:19,397 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;@77757f95, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-21 20:40:19,398 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-21 20:40:19,402 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 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) [2024-11-21 20:40:19,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-21 20:40:19,408 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:40:19,409 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:40:19,409 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:40:19,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:40:19,413 INFO L85 PathProgramCache]: Analyzing trace with hash -2015557098, now seen corresponding path program 1 times [2024-11-21 20:40:19,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:40:19,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015387506] [2024-11-21 20:40:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:40:19,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:40:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:40:19,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:40:19,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:40:19,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015387506] [2024-11-21 20:40:19,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015387506] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 20:40:19,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 20:40:19,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-21 20:40:19,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4913636] [2024-11-21 20:40:19,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 20:40:19,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-21 20:40:19,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:40:19,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-21 20:40:19,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-21 20:40:19,695 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 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 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-11-21 20:40:19,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:40:19,724 INFO L93 Difference]: Finished difference Result 33 states and 47 transitions. [2024-11-21 20:40:19,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-21 20:40:19,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2024-11-21 20:40:19,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:40:19,733 INFO L225 Difference]: With dead ends: 33 [2024-11-21 20:40:19,734 INFO L226 Difference]: Without dead ends: 16 [2024-11-21 20:40:19,737 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-21 20:40:19,740 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 20:40:19,742 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 20:40:19,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-21 20:40:19,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2024-11-21 20:40:19,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:40:19,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-11-21 20:40:19,771 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2024-11-21 20:40:19,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:40:19,771 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-11-21 20:40:19,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-11-21 20:40:19,772 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-11-21 20:40:19,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-21 20:40:19,772 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:40:19,773 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:40:19,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-21 20:40:19,773 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:40:19,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:40:19,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1338517781, now seen corresponding path program 1 times [2024-11-21 20:40:19,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:40:19,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774848325] [2024-11-21 20:40:19,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:40:19,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:40:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:40:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 20:40:19,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:40:19,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774848325] [2024-11-21 20:40:19,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774848325] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:40:19,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823029932] [2024-11-21 20:40:19,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:40:19,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:40:19,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:40:19,944 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) [2024-11-21 20:40:19,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-21 20:40:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:40:20,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-21 20:40:20,034 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:40:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 20:40:20,083 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:40:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 20:40:20,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823029932] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:40:20,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:40:20,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-21 20:40:20,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806378561] [2024-11-21 20:40:20,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:40:20,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-21 20:40:20,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:40:20,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-21 20:40:20,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-21 20:40:20,120 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:40:20,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:40:20,173 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2024-11-21 20:40:20,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-21 20:40:20,189 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-21 20:40:20,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:40:20,190 INFO L225 Difference]: With dead ends: 34 [2024-11-21 20:40:20,190 INFO L226 Difference]: Without dead ends: 24 [2024-11-21 20:40:20,190 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-21 20:40:20,191 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 20:40:20,192 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 20:40:20,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-21 20:40:20,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-21 20:40:20,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:40:20,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2024-11-21 20:40:20,204 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 12 [2024-11-21 20:40:20,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:40:20,204 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2024-11-21 20:40:20,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:40:20,204 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2024-11-21 20:40:20,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-21 20:40:20,205 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:40:20,205 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:40:20,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-21 20:40:20,406 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 [2024-11-21 20:40:20,406 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:40:20,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:40:20,407 INFO L85 PathProgramCache]: Analyzing trace with hash -150327986, now seen corresponding path program 2 times [2024-11-21 20:40:20,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:40:20,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936051008] [2024-11-21 20:40:20,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 20:40:20,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:40:20,482 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 20:40:20,482 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:40:20,683 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-21 20:40:20,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:40:20,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936051008] [2024-11-21 20:40:20,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936051008] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:40:20,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171527240] [2024-11-21 20:40:20,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 20:40:20,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:40:20,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:40:20,689 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) [2024-11-21 20:40:20,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-21 20:40:20,793 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 20:40:20,793 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:40:20,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-21 20:40:20,797 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:40:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-21 20:40:20,835 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:40:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-21 20:40:20,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171527240] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:40:20,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:40:20,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-21 20:40:20,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903774501] [2024-11-21 20:40:20,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:40:20,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-21 20:40:20,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:40:20,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-21 20:40:20,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-21 20:40:20,942 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) [2024-11-21 20:40:21,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:40:21,045 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2024-11-21 20:40:21,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-21 20:40:21,046 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) Word has length 21 [2024-11-21 20:40:21,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:40:21,048 INFO L225 Difference]: With dead ends: 55 [2024-11-21 20:40:21,048 INFO L226 Difference]: Without dead ends: 42 [2024-11-21 20:40:21,049 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-21 20:40:21,051 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 20:40:21,051 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 36 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 20:40:21,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-21 20:40:21,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-21 20:40:21,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 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) [2024-11-21 20:40:21,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2024-11-21 20:40:21,057 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 21 [2024-11-21 20:40:21,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:40:21,058 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2024-11-21 20:40:21,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) [2024-11-21 20:40:21,058 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2024-11-21 20:40:21,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-21 20:40:21,059 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:40:21,059 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:40:21,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-21 20:40:21,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-21 20:40:21,264 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:40:21,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:40:21,264 INFO L85 PathProgramCache]: Analyzing trace with hash 887583778, now seen corresponding path program 3 times [2024-11-21 20:40:21,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:40:21,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810473052] [2024-11-21 20:40:21,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 20:40:21,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:40:21,405 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-21 20:40:21,405 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:40:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-21 20:40:21,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:40:21,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810473052] [2024-11-21 20:40:21,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810473052] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:40:21,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302203938] [2024-11-21 20:40:21,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 20:40:21,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:40:21,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:40:21,700 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) [2024-11-21 20:40:21,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-21 20:40:21,967 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-21 20:40:21,967 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:40:21,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-21 20:40:21,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:40:22,005 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-21 20:40:22,005 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:40:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-21 20:40:22,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302203938] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:40:22,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:40:22,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-21 20:40:22,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504840906] [2024-11-21 20:40:22,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:40:22,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-21 20:40:22,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:40:22,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-21 20:40:22,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-21 20:40:22,234 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 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) [2024-11-21 20:40:22,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:40:22,431 INFO L93 Difference]: Finished difference Result 97 states and 124 transitions. [2024-11-21 20:40:22,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-21 20:40:22,432 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 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 39 [2024-11-21 20:40:22,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:40:22,433 INFO L225 Difference]: With dead ends: 97 [2024-11-21 20:40:22,433 INFO L226 Difference]: Without dead ends: 78 [2024-11-21 20:40:22,433 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-21 20:40:22,434 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 59 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-21 20:40:22,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 36 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-21 20:40:22,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-21 20:40:22,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-21 20:40:22,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 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) [2024-11-21 20:40:22,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2024-11-21 20:40:22,453 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 39 [2024-11-21 20:40:22,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:40:22,453 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2024-11-21 20:40:22,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 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) [2024-11-21 20:40:22,454 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2024-11-21 20:40:22,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-21 20:40:22,455 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:40:22,456 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:40:22,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-21 20:40:22,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:40:22,657 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:40:22,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:40:22,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1865987530, now seen corresponding path program 4 times [2024-11-21 20:40:22,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:40:22,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871520257] [2024-11-21 20:40:22,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 20:40:22,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:40:22,751 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 20:40:22,752 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:40:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-21 20:40:23,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:40:23,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871520257] [2024-11-21 20:40:23,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871520257] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:40:23,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475879124] [2024-11-21 20:40:23,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 20:40:23,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:40:23,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:40:23,626 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) [2024-11-21 20:40:23,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-21 20:40:23,806 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 20:40:23,806 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:40:23,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-21 20:40:23,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:40:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-21 20:40:23,900 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:40:24,715 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-21 20:40:24,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475879124] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:40:24,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:40:24,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2024-11-21 20:40:24,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759369930] [2024-11-21 20:40:24,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:40:24,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-21 20:40:24,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:40:24,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-21 20:40:24,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2024-11-21 20:40:24,722 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 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) [2024-11-21 20:40:25,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:40:25,043 INFO L93 Difference]: Finished difference Result 181 states and 232 transitions. [2024-11-21 20:40:25,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-21 20:40:25,046 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 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 75 [2024-11-21 20:40:25,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:40:25,048 INFO L225 Difference]: With dead ends: 181 [2024-11-21 20:40:25,048 INFO L226 Difference]: Without dead ends: 150 [2024-11-21 20:40:25,049 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2024-11-21 20:40:25,050 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-21 20:40:25,050 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 60 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-21 20:40:25,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-21 20:40:25,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2024-11-21 20:40:25,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0201342281879195) internal successors, (152), 149 states have internal predecessors, (152), 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) [2024-11-21 20:40:25,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2024-11-21 20:40:25,065 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 75 [2024-11-21 20:40:25,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:40:25,065 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2024-11-21 20:40:25,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 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) [2024-11-21 20:40:25,065 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2024-11-21 20:40:25,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-11-21 20:40:25,070 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:40:25,070 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:40:25,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-21 20:40:25,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:40:25,275 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:40:25,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:40:25,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1455093478, now seen corresponding path program 5 times [2024-11-21 20:40:25,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:40:25,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828513448] [2024-11-21 20:40:25,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 20:40:25,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:40:28,542 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2024-11-21 20:40:28,543 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:40:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2024-11-21 20:40:31,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:40:31,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828513448] [2024-11-21 20:40:31,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828513448] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:40:31,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682260490] [2024-11-21 20:40:31,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 20:40:31,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:40:31,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:40:31,157 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) [2024-11-21 20:40:31,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process