./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/xor5.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-crafted/xor5.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 a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-21 20:53:06,822 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-21 20:53:06,872 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-21 20:53:06,876 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-21 20:53:06,878 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-21 20:53:06,895 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-21 20:53:06,895 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-21 20:53:06,896 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-21 20:53:06,896 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-21 20:53:06,896 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-21 20:53:06,897 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-21 20:53:06,897 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-21 20:53:06,897 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-21 20:53:06,898 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-21 20:53:06,898 INFO L153 SettingsManager]: * Use SBE=true [2024-11-21 20:53:06,898 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-21 20:53:06,898 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-21 20:53:06,899 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-21 20:53:06,899 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-21 20:53:06,899 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-21 20:53:06,899 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-21 20:53:06,903 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-21 20:53:06,904 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-21 20:53:06,904 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-21 20:53:06,904 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-21 20:53:06,904 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-21 20:53:06,904 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-21 20:53:06,904 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-21 20:53:06,905 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-21 20:53:06,905 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-21 20:53:06,905 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-21 20:53:06,905 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-21 20:53:06,905 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 20:53:06,905 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-21 20:53:06,905 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-21 20:53:06,906 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-21 20:53:06,912 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-21 20:53:06,912 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-21 20:53:06,912 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-21 20:53:06,913 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-21 20:53:06,913 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-21 20:53:06,914 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-21 20:53:06,914 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 [2024-11-21 20:53:07,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-21 20:53:07,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-21 20:53:07,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-21 20:53:07,131 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-21 20:53:07,132 INFO L274 PluginConnector]: CDTParser initialized [2024-11-21 20:53:07,132 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/xor5.i [2024-11-21 20:53:08,423 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-21 20:53:08,559 INFO L384 CDTParser]: Found 1 translation units. [2024-11-21 20:53:08,560 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor5.i [2024-11-21 20:53:08,568 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c81304d1e/0f1e2806193e4fe892597207505d02f2/FLAGcd935eba3 [2024-11-21 20:53:08,578 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c81304d1e/0f1e2806193e4fe892597207505d02f2 [2024-11-21 20:53:08,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-21 20:53:08,580 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-21 20:53:08,581 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-21 20:53:08,581 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-21 20:53:08,585 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-21 20:53:08,586 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:53:08" (1/1) ... [2024-11-21 20:53:08,588 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e4d3fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:53:08, skipping insertion in model container [2024-11-21 20:53:08,588 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:53:08" (1/1) ... [2024-11-21 20:53:08,604 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-21 20:53:08,736 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-crafted/xor5.i[1364,1377] [2024-11-21 20:53:08,739 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 20:53:08,744 INFO L200 MainTranslator]: Completed pre-run [2024-11-21 20:53:08,758 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-crafted/xor5.i[1364,1377] [2024-11-21 20:53:08,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 20:53:08,778 INFO L204 MainTranslator]: Completed translation [2024-11-21 20:53:08,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:53:08 WrapperNode [2024-11-21 20:53:08,779 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-21 20:53:08,780 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-21 20:53:08,780 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-21 20:53:08,780 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-21 20:53:08,786 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:53:08" (1/1) ... [2024-11-21 20:53:08,794 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:53:08" (1/1) ... [2024-11-21 20:53:08,809 INFO L138 Inliner]: procedures = 16, calls = 29, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 81 [2024-11-21 20:53:08,811 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-21 20:53:08,812 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-21 20:53:08,812 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-21 20:53:08,812 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-21 20:53:08,820 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:53:08" (1/1) ... [2024-11-21 20:53:08,820 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:53:08" (1/1) ... [2024-11-21 20:53:08,823 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:53:08" (1/1) ... [2024-11-21 20:53:08,839 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 7, 11]. 55 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0]. The 5 writes are split as follows [0, 0, 5]. [2024-11-21 20:53:08,839 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:53:08" (1/1) ... [2024-11-21 20:53:08,839 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:53:08" (1/1) ... [2024-11-21 20:53:08,844 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:53:08" (1/1) ... [2024-11-21 20:53:08,847 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:53:08" (1/1) ... [2024-11-21 20:53:08,848 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:53:08" (1/1) ... [2024-11-21 20:53:08,849 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:53:08" (1/1) ... [2024-11-21 20:53:08,851 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-21 20:53:08,851 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-21 20:53:08,852 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-21 20:53:08,852 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-21 20:53:08,852 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:53:08" (1/1) ... [2024-11-21 20:53:08,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 20:53:08,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:53:08,883 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 20:53:08,885 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 20:53:08,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-21 20:53:08,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-21 20:53:08,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-21 20:53:08,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-21 20:53:08,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-21 20:53:08,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-21 20:53:08,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-21 20:53:08,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-21 20:53:08,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-21 20:53:08,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-21 20:53:08,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-21 20:53:08,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-21 20:53:08,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-21 20:53:08,921 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2024-11-21 20:53:08,921 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2024-11-21 20:53:08,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-21 20:53:09,002 INFO L238 CfgBuilder]: Building ICFG [2024-11-21 20:53:09,007 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-21 20:53:09,185 INFO L? ?]: Removed 22 outVars from TransFormulas that were not future-live. [2024-11-21 20:53:09,188 INFO L287 CfgBuilder]: Performing block encoding [2024-11-21 20:53:09,199 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-21 20:53:09,200 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-21 20:53:09,200 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:53:09 BoogieIcfgContainer [2024-11-21 20:53:09,200 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-21 20:53:09,202 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-21 20:53:09,203 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-21 20:53:09,206 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-21 20:53:09,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 08:53:08" (1/3) ... [2024-11-21 20:53:09,206 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5532527f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:53:09, skipping insertion in model container [2024-11-21 20:53:09,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:53:08" (2/3) ... [2024-11-21 20:53:09,207 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5532527f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:53:09, skipping insertion in model container [2024-11-21 20:53:09,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:53:09" (3/3) ... [2024-11-21 20:53:09,208 INFO L112 eAbstractionObserver]: Analyzing ICFG xor5.i [2024-11-21 20:53:09,219 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-21 20:53:09,219 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-21 20:53:09,256 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-21 20:53:09,261 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;@3fb6f380, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-21 20:53:09,261 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-21 20:53:09,264 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 29 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-21 20:53:09,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-21 20:53:09,271 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:53:09,271 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:53:09,271 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:53:09,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:53:09,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1833527262, now seen corresponding path program 1 times [2024-11-21 20:53:09,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:53:09,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612937547] [2024-11-21 20:53:09,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:53:09,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:53:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:53:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-21 20:53:09,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:53:09,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612937547] [2024-11-21 20:53:09,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612937547] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 20:53:09,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 20:53:09,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-21 20:53:09,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806572957] [2024-11-21 20:53:09,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 20:53:09,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-21 20:53:09,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:53:09,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-21 20:53:09,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-21 20:53:09,464 INFO L87 Difference]: Start difference. First operand has 34 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 29 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-21 20:53:09,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:53:09,480 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2024-11-21 20:53:09,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-21 20:53:09,482 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2024-11-21 20:53:09,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:53:09,487 INFO L225 Difference]: With dead ends: 63 [2024-11-21 20:53:09,487 INFO L226 Difference]: Without dead ends: 29 [2024-11-21 20:53:09,490 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 [2024-11-21 20:53:09,492 INFO L432 NwaCegarLoop]: 42 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, 42 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 [2024-11-21 20:53:09,493 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 20:53:09,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-21 20:53:09,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-21 20:53:09,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-21 20:53:09,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-11-21 20:53:09,524 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 30 [2024-11-21 20:53:09,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:53:09,525 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-11-21 20:53:09,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-21 20:53:09,526 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-11-21 20:53:09,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-21 20:53:09,528 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:53:09,528 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:53:09,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-21 20:53:09,529 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:53:09,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:53:09,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2011293254, now seen corresponding path program 1 times [2024-11-21 20:53:09,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:53:09,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331262238] [2024-11-21 20:53:09,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:53:09,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:53:09,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:53:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-21 20:53:09,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:53:09,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331262238] [2024-11-21 20:53:09,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331262238] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 20:53:09,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 20:53:09,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-21 20:53:09,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446245807] [2024-11-21 20:53:09,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 20:53:09,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-21 20:53:09,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:53:09,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-21 20:53:09,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-21 20:53:09,696 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-21 20:53:09,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:53:09,722 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2024-11-21 20:53:09,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-21 20:53:09,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2024-11-21 20:53:09,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:53:09,724 INFO L225 Difference]: With dead ends: 55 [2024-11-21 20:53:09,724 INFO L226 Difference]: Without dead ends: 31 [2024-11-21 20:53:09,725 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 20:53:09,726 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 20:53:09,727 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 20:53:09,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-21 20:53:09,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2024-11-21 20:53:09,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-21 20:53:09,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2024-11-21 20:53:09,732 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 30 [2024-11-21 20:53:09,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:53:09,733 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2024-11-21 20:53:09,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-21 20:53:09,733 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2024-11-21 20:53:09,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-21 20:53:09,735 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:53:09,735 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:53:09,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-21 20:53:09,735 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:53:09,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:53:09,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1289163608, now seen corresponding path program 1 times [2024-11-21 20:53:09,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:53:09,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569608953] [2024-11-21 20:53:09,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:53:09,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:53:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:53:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-21 20:53:09,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:53:09,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569608953] [2024-11-21 20:53:09,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569608953] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:53:09,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986811160] [2024-11-21 20:53:09,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:53:09,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:53:09,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:53:09,869 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 20:53:09,871 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 20:53:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:53:09,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-21 20:53:09,954 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:53:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-21 20:53:10,017 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:53:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-21 20:53:10,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986811160] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:53:10,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:53:10,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-11-21 20:53:10,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495862016] [2024-11-21 20:53:10,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:53:10,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-21 20:53:10,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:53:10,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-21 20:53:10,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-21 20:53:10,075 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-21 20:53:10,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:53:10,148 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2024-11-21 20:53:10,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-21 20:53:10,149 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 32 [2024-11-21 20:53:10,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:53:10,149 INFO L225 Difference]: With dead ends: 64 [2024-11-21 20:53:10,149 INFO L226 Difference]: Without dead ends: 40 [2024-11-21 20:53:10,150 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-21 20:53:10,152 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 50 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 20:53:10,153 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 88 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 20:53:10,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-21 20:53:10,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2024-11-21 20:53:10,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-21 20:53:10,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-11-21 20:53:10,157 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 32 [2024-11-21 20:53:10,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:53:10,158 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-11-21 20:53:10,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-21 20:53:10,158 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-11-21 20:53:10,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-21 20:53:10,160 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:53:10,161 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:53:10,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-21 20:53:10,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:53:10,365 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:53:10,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:53:10,366 INFO L85 PathProgramCache]: Analyzing trace with hash -741098063, now seen corresponding path program 1 times [2024-11-21 20:53:10,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:53:10,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946032644] [2024-11-21 20:53:10,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:53:10,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:53:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:53:10,482 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-21 20:53:10,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:53:10,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946032644] [2024-11-21 20:53:10,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946032644] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 20:53:10,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 20:53:10,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-21 20:53:10,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513256384] [2024-11-21 20:53:10,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 20:53:10,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-21 20:53:10,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:53:10,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-21 20:53:10,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-21 20:53:10,487 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-21 20:53:10,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:53:10,525 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2024-11-21 20:53:10,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-21 20:53:10,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2024-11-21 20:53:10,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:53:10,526 INFO L225 Difference]: With dead ends: 53 [2024-11-21 20:53:10,526 INFO L226 Difference]: Without dead ends: 35 [2024-11-21 20:53:10,526 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-21 20:53:10,527 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 27 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 20:53:10,527 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 46 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 20:53:10,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-21 20:53:10,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2024-11-21 20:53:10,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-21 20:53:10,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2024-11-21 20:53:10,537 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 46 [2024-11-21 20:53:10,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:53:10,539 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2024-11-21 20:53:10,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-21 20:53:10,539 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2024-11-21 20:53:10,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-21 20:53:10,541 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:53:10,541 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:53:10,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-21 20:53:10,542 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:53:10,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:53:10,542 INFO L85 PathProgramCache]: Analyzing trace with hash -84841073, now seen corresponding path program 1 times [2024-11-21 20:53:10,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:53:10,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285465385] [2024-11-21 20:53:10,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:53:10,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:53:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:53:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-21 20:53:12,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:53:12,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285465385] [2024-11-21 20:53:12,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285465385] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:53:12,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060548971] [2024-11-21 20:53:12,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:53:12,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:53:12,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:53:12,611 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 20:53:12,612 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 20:53:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:53:12,735 WARN L253 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-11-21 20:53:12,741 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:53:12,822 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 15 treesize of output 1 [2024-11-21 20:53:13,182 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:53:13,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 40 [2024-11-21 20:53:13,785 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:53:13,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 43 [2024-11-21 20:53:13,944 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:53:13,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 43 [2024-11-21 20:53:14,527 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 20:53:14,529 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:53:16,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 127 treesize of output 113 [2024-11-21 20:53:16,884 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:53:16,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 74 [2024-11-21 20:53:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-21 20:53:16,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060548971] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:53:16,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:53:16,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 30] total 86 [2024-11-21 20:53:16,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825473209] [2024-11-21 20:53:16,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:53:16,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-21 20:53:16,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:53:16,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-21 20:53:16,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=6780, Unknown=0, NotChecked=0, Total=7310 [2024-11-21 20:53:16,996 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 86 states, 80 states have (on average 1.4375) internal successors, (115), 76 states have internal predecessors, (115), 8 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-21 20:53:30,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:53:30,627 INFO L93 Difference]: Finished difference Result 444 states and 640 transitions. [2024-11-21 20:53:30,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2024-11-21 20:53:30,627 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 80 states have (on average 1.4375) internal successors, (115), 76 states have internal predecessors, (115), 8 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 48 [2024-11-21 20:53:30,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:53:30,634 INFO L225 Difference]: With dead ends: 444 [2024-11-21 20:53:30,634 INFO L226 Difference]: Without dead ends: 436 [2024-11-21 20:53:30,647 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17870 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=4993, Invalid=51413, Unknown=0, NotChecked=0, Total=56406 [2024-11-21 20:53:30,648 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 758 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 6830 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 7042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 6830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-21 20:53:30,648 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 695 Invalid, 7042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 6830 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-21 20:53:30,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2024-11-21 20:53:30,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 230. [2024-11-21 20:53:30,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 204 states have (on average 1.4019607843137254) internal successors, (286), 215 states have internal predecessors, (286), 13 states have call successors, (13), 3 states have call predecessors, (13), 12 states have return successors, (51), 11 states have call predecessors, (51), 13 states have call successors, (51) [2024-11-21 20:53:30,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 350 transitions. [2024-11-21 20:53:30,699 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 350 transitions. Word has length 48 [2024-11-21 20:53:30,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:53:30,699 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 350 transitions. [2024-11-21 20:53:30,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 80 states have (on average 1.4375) internal successors, (115), 76 states have internal predecessors, (115), 8 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-21 20:53:30,699 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 350 transitions. [2024-11-21 20:53:30,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-21 20:53:30,705 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:53:30,706 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:53:30,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-21 20:53:30,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:53:30,907 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:53:30,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:53:30,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1705392919, now seen corresponding path program 1 times [2024-11-21 20:53:30,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:53:30,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64362675] [2024-11-21 20:53:30,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:53:30,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:53:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:53:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-21 20:53:31,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:53:31,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64362675] [2024-11-21 20:53:31,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64362675] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:53:31,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048486630] [2024-11-21 20:53:31,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:53:31,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:53:31,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:53:31,390 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 20:53:31,391 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 20:53:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:53:31,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-21 20:53:31,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:53:31,538 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:53:31,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-11-21 20:53:31,613 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 [2024-11-21 20:53:31,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:53:31,639 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-11-21 20:53:31,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 25 [2024-11-21 20:53:31,732 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-21 20:53:31,732 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:53:31,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048486630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:53:31,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-21 20:53:31,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2024-11-21 20:53:31,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59631451] [2024-11-21 20:53:31,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-21 20:53:31,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-21 20:53:31,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:53:31,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-21 20:53:31,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2024-11-21 20:53:31,883 INFO L87 Difference]: Start difference. First operand 230 states and 350 transitions. Second operand has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 3 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-21 20:53:32,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:53:32,294 INFO L93 Difference]: Finished difference Result 767 states and 1132 transitions. [2024-11-21 20:53:32,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-21 20:53:32,295 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 3 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2024-11-21 20:53:32,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:53:32,301 INFO L225 Difference]: With dead ends: 767 [2024-11-21 20:53:32,301 INFO L226 Difference]: Without dead ends: 672 [2024-11-21 20:53:32,302 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=1187, Unknown=0, NotChecked=0, Total=1406 [2024-11-21 20:53:32,303 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 117 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-21 20:53:32,303 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 464 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-21 20:53:32,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2024-11-21 20:53:32,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 467. [2024-11-21 20:53:32,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 418 states have (on average 1.3995215311004785) internal successors, (585), 438 states have internal predecessors, (585), 22 states have call successors, (22), 9 states have call predecessors, (22), 26 states have return successors, (88), 19 states have call predecessors, (88), 22 states have call successors, (88) [2024-11-21 20:53:32,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 695 transitions. [2024-11-21 20:53:32,362 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 695 transitions. Word has length 49 [2024-11-21 20:53:32,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:53:32,363 INFO L471 AbstractCegarLoop]: Abstraction has 467 states and 695 transitions. [2024-11-21 20:53:32,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 3 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-21 20:53:32,363 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 695 transitions. [2024-11-21 20:53:32,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-21 20:53:32,367 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:53:32,368 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:53:32,374 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 20:53:32,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:53:32,569 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:53:32,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:53:32,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1296174681, now seen corresponding path program 2 times [2024-11-21 20:53:32,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:53:32,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948283002] [2024-11-21 20:53:32,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 20:53:32,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:53:32,615 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 20:53:32,615 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:53:33,897 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-21 20:53:33,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:53:33,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948283002] [2024-11-21 20:53:33,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948283002] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:53:33,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83520565] [2024-11-21 20:53:33,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 20:53:33,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:53:33,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:53:33,900 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 20:53:33,901 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 20:53:33,956 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 20:53:33,956 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:53:33,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-11-21 20:53:33,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:53:34,022 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 15 treesize of output 1 [2024-11-21 20:53:34,279 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 65 treesize of output 34 [2024-11-21 20:53:34,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 100 treesize of output 72 [2024-11-21 20:53:34,665 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 15 treesize of output 1 [2024-11-21 20:53:34,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 134 treesize of output 94 [2024-11-21 20:53:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-21 20:53:35,073 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:53:35,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 45 treesize of output 41 [2024-11-21 20:53:35,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 56 treesize of output 48 [2024-11-21 20:53:35,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 43 treesize of output 39 [2024-11-21 20:53:35,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 52 treesize of output 44 [2024-11-21 20:53:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-21 20:53:36,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83520565] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:53:36,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:53:36,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27, 26] total 65 [2024-11-21 20:53:36,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750825320] [2024-11-21 20:53:36,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:53:36,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-21 20:53:36,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:53:36,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-21 20:53:36,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=3847, Unknown=0, NotChecked=0, Total=4160 [2024-11-21 20:53:36,493 INFO L87 Difference]: Start difference. First operand 467 states and 695 transitions. Second operand has 65 states, 60 states have (on average 1.8166666666666667) internal successors, (109), 58 states have internal predecessors, (109), 7 states have call successors, (9), 2 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-21 20:53:37,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:53:37,951 INFO L93 Difference]: Finished difference Result 675 states and 1002 transitions. [2024-11-21 20:53:37,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-21 20:53:37,954 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 60 states have (on average 1.8166666666666667) internal successors, (109), 58 states have internal predecessors, (109), 7 states have call successors, (9), 2 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 49 [2024-11-21 20:53:37,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:53:37,957 INFO L225 Difference]: With dead ends: 675 [2024-11-21 20:53:37,957 INFO L226 Difference]: Without dead ends: 671 [2024-11-21 20:53:37,957 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2078 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=521, Invalid=5799, Unknown=0, NotChecked=0, Total=6320 [2024-11-21 20:53:37,958 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 258 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-21 20:53:37,958 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 365 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-21 20:53:37,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2024-11-21 20:53:38,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 460. [2024-11-21 20:53:38,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 413 states have (on average 1.4019370460048426) internal successors, (579), 430 states have internal predecessors, (579), 21 states have call successors, (21), 8 states have call predecessors, (21), 25 states have return successors, (90), 21 states have call predecessors, (90), 21 states have call successors, (90) [2024-11-21 20:53:38,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 690 transitions. [2024-11-21 20:53:38,010 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 690 transitions. Word has length 49 [2024-11-21 20:53:38,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:53:38,010 INFO L471 AbstractCegarLoop]: Abstraction has 460 states and 690 transitions. [2024-11-21 20:53:38,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 60 states have (on average 1.8166666666666667) internal successors, (109), 58 states have internal predecessors, (109), 7 states have call successors, (9), 2 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-21 20:53:38,011 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 690 transitions. [2024-11-21 20:53:38,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-21 20:53:38,012 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:53:38,013 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:53:38,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-21 20:53:38,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:53:38,217 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:53:38,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:53:38,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2027171743, now seen corresponding path program 3 times [2024-11-21 20:53:38,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:53:38,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918796638] [2024-11-21 20:53:38,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 20:53:38,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:53:38,251 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-21 20:53:38,251 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:53:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 20:53:40,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:53:40,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918796638] [2024-11-21 20:53:40,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918796638] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:53:40,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329453188] [2024-11-21 20:53:40,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 20:53:40,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:53:40,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:53:40,531 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 20:53:40,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-21 20:53:40,594 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-21 20:53:40,594 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:53:40,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-21 20:53:40,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:53:40,797 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:53:40,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 40 [2024-11-21 20:53:41,181 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 98 treesize of output 65 [2024-11-21 20:53:41,341 INFO L349 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2024-11-21 20:53:41,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 76 [2024-11-21 20:53:42,059 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:53:42,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 258 treesize of output 210 [2024-11-21 20:53:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-21 20:53:42,260 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:53:47,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 85 treesize of output 53 [2024-11-21 20:53:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-21 20:53:47,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329453188] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:53:47,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:53:47,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 24, 22] total 73 [2024-11-21 20:53:47,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138174055] [2024-11-21 20:53:47,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:53:47,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-21 20:53:47,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:53:47,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-21 20:53:47,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=4982, Unknown=1, NotChecked=0, Total=5256 [2024-11-21 20:53:47,535 INFO L87 Difference]: Start difference. First operand 460 states and 690 transitions. Second operand has 73 states, 68 states have (on average 1.7205882352941178) internal successors, (117), 64 states have internal predecessors, (117), 9 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-21 20:53:51,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-21 20:53:55,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-21 20:53:59,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-21 20:54:03,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-21 20:54:08,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-21 20:54:13,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-21 20:54:18,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-21 20:54:24,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-21 20:54:29,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-21 20:54:41,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]