/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/termination-memory-linkedlists/ll_append-alloca-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 17:59:06,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 17:59:06,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 17:59:06,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 17:59:06,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 17:59:06,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 17:59:06,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 17:59:06,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 17:59:06,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 17:59:06,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 17:59:06,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 17:59:06,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 17:59:06,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 17:59:06,357 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 17:59:06,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 17:59:06,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 17:59:06,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 17:59:06,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 17:59:06,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 17:59:06,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 17:59:06,389 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 17:59:06,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 17:59:06,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 17:59:06,394 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 17:59:06,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 17:59:06,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 17:59:06,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 17:59:06,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 17:59:06,421 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 17:59:06,482 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 17:59:06,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 17:59:06,483 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 17:59:06,483 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 17:59:06,486 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 17:59:06,486 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 17:59:06,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 17:59:06,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 17:59:06,490 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 17:59:06,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 17:59:06,491 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 17:59:06,491 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 17:59:06,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 17:59:06,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 17:59:06,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 17:59:06,492 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 17:59:06,492 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 17:59:06,493 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 17:59:06,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 17:59:06,493 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 17:59:06,493 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 17:59:06,493 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 17:59:06,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 17:59:06,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 17:59:06,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 17:59:06,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:59:06,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 17:59:06,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 17:59:06,495 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 17:59:06,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 17:59:06,495 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 17:59:06,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 17:59:07,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 17:59:07,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 17:59:07,030 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 17:59:07,031 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 17:59:07,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-memory-linkedlists/ll_append-alloca-1.i [2022-10-15 17:59:07,136 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aff6fdbcd/d31d988e17674c07816d5598aa41bcac/FLAG2852045fc [2022-10-15 17:59:07,973 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 17:59:07,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-memory-linkedlists/ll_append-alloca-1.i [2022-10-15 17:59:07,997 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aff6fdbcd/d31d988e17674c07816d5598aa41bcac/FLAG2852045fc [2022-10-15 17:59:08,232 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aff6fdbcd/d31d988e17674c07816d5598aa41bcac [2022-10-15 17:59:08,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 17:59:08,245 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 17:59:08,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 17:59:08,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 17:59:08,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 17:59:08,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:59:08" (1/1) ... [2022-10-15 17:59:08,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44678fb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:08, skipping insertion in model container [2022-10-15 17:59:08,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:59:08" (1/1) ... [2022-10-15 17:59:08,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 17:59:08,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 17:59:08,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:59:08,712 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 17:59:08,772 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:59:08,813 INFO L208 MainTranslator]: Completed translation [2022-10-15 17:59:08,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:08 WrapperNode [2022-10-15 17:59:08,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 17:59:08,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 17:59:08,816 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 17:59:08,816 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 17:59:08,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:08" (1/1) ... [2022-10-15 17:59:08,843 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:08" (1/1) ... [2022-10-15 17:59:08,873 INFO L138 Inliner]: procedures = 115, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2022-10-15 17:59:08,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 17:59:08,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 17:59:08,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 17:59:08,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 17:59:08,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:08" (1/1) ... [2022-10-15 17:59:08,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:08" (1/1) ... [2022-10-15 17:59:08,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:08" (1/1) ... [2022-10-15 17:59:08,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:08" (1/1) ... [2022-10-15 17:59:08,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:08" (1/1) ... [2022-10-15 17:59:08,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:08" (1/1) ... [2022-10-15 17:59:08,906 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:08" (1/1) ... [2022-10-15 17:59:08,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:08" (1/1) ... [2022-10-15 17:59:08,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 17:59:08,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 17:59:08,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 17:59:08,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 17:59:08,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:08" (1/1) ... [2022-10-15 17:59:08,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:59:08,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:08,954 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-15 17:59:08,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-15 17:59:09,028 INFO L130 BoogieDeclarations]: Found specification of procedure new_ll [2022-10-15 17:59:09,028 INFO L138 BoogieDeclarations]: Found implementation of procedure new_ll [2022-10-15 17:59:09,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 17:59:09,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-15 17:59:09,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-15 17:59:09,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-15 17:59:09,029 INFO L130 BoogieDeclarations]: Found specification of procedure length [2022-10-15 17:59:09,030 INFO L138 BoogieDeclarations]: Found implementation of procedure length [2022-10-15 17:59:09,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 17:59:09,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 17:59:09,131 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 17:59:09,139 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 17:59:09,536 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 17:59:09,544 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 17:59:09,545 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-15 17:59:09,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:59:09 BoogieIcfgContainer [2022-10-15 17:59:09,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 17:59:09,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 17:59:09,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 17:59:09,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 17:59:09,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 05:59:08" (1/3) ... [2022-10-15 17:59:09,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4caf7319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:59:09, skipping insertion in model container [2022-10-15 17:59:09,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:08" (2/3) ... [2022-10-15 17:59:09,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4caf7319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:59:09, skipping insertion in model container [2022-10-15 17:59:09,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:59:09" (3/3) ... [2022-10-15 17:59:09,559 INFO L112 eAbstractionObserver]: Analyzing ICFG ll_append-alloca-1.i [2022-10-15 17:59:09,583 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 17:59:09,584 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-10-15 17:59:09,641 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 17:59:09,651 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@2cd4117c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 17:59:09,651 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-10-15 17:59:09,657 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 40 states have internal predecessors, (46), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-15 17:59:09,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:59:09,665 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:09,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:59:09,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-15 17:59:09,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:09,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1695243, now seen corresponding path program 1 times [2022-10-15 17:59:09,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:09,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194409100] [2022-10-15 17:59:09,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:09,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:09,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:59:09,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:09,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194409100] [2022-10-15 17:59:09,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194409100] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:59:09,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:59:09,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:59:09,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680493331] [2022-10-15 17:59:09,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:59:09,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:59:09,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:09,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:59:09,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:59:09,936 INFO L87 Difference]: Start difference. First operand has 48 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 40 states have internal predecessors, (46), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:59:10,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:10,005 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-10-15 17:59:10,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:59:10,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 17:59:10,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:10,019 INFO L225 Difference]: With dead ends: 49 [2022-10-15 17:59:10,019 INFO L226 Difference]: Without dead ends: 46 [2022-10-15 17:59:10,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:59:10,030 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:10,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 87 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:59:10,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-10-15 17:59:10,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-10-15 17:59:10,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 38 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-15 17:59:10,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-10-15 17:59:10,097 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 4 [2022-10-15 17:59:10,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:10,098 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-10-15 17:59:10,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:59:10,098 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-10-15 17:59:10,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 17:59:10,101 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:10,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:10,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 17:59:10,103 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-15 17:59:10,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:10,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1034567630, now seen corresponding path program 1 times [2022-10-15 17:59:10,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:10,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377020838] [2022-10-15 17:59:10,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:10,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:10,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:59:10,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:10,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377020838] [2022-10-15 17:59:10,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377020838] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:59:10,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:59:10,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:59:10,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968166093] [2022-10-15 17:59:10,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:59:10,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:59:10,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:10,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:59:10,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:59:10,260 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:59:10,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:10,345 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-10-15 17:59:10,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:59:10,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 17:59:10,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:10,355 INFO L225 Difference]: With dead ends: 47 [2022-10-15 17:59:10,355 INFO L226 Difference]: Without dead ends: 47 [2022-10-15 17:59:10,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:59:10,360 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 4 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:10,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 83 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:59:10,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-10-15 17:59:10,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-10-15 17:59:10,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 37 states have internal predecessors, (41), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-15 17:59:10,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-10-15 17:59:10,389 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 7 [2022-10-15 17:59:10,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:10,390 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-10-15 17:59:10,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:59:10,390 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-10-15 17:59:10,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 17:59:10,391 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:10,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:10,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 17:59:10,395 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-15 17:59:10,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:10,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1034567629, now seen corresponding path program 1 times [2022-10-15 17:59:10,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:10,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922288329] [2022-10-15 17:59:10,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:10,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:10,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:59:10,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:10,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922288329] [2022-10-15 17:59:10,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922288329] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:59:10,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:59:10,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:59:10,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493231409] [2022-10-15 17:59:10,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:59:10,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:59:10,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:10,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:59:10,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:59:10,630 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:59:10,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:10,664 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-10-15 17:59:10,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:59:10,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 17:59:10,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:10,666 INFO L225 Difference]: With dead ends: 44 [2022-10-15 17:59:10,667 INFO L226 Difference]: Without dead ends: 44 [2022-10-15 17:59:10,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:59:10,669 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 1 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:10,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 83 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:59:10,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-10-15 17:59:10,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-10-15 17:59:10,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 36 states have internal predecessors, (40), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-15 17:59:10,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-10-15 17:59:10,685 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 7 [2022-10-15 17:59:10,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:10,685 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-10-15 17:59:10,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:59:10,686 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-10-15 17:59:10,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-15 17:59:10,687 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:10,687 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:10,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 17:59:10,688 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-15 17:59:10,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:10,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1869902026, now seen corresponding path program 1 times [2022-10-15 17:59:10,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:10,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409055323] [2022-10-15 17:59:10,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:10,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:10,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-15 17:59:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:10,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 17:59:10,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:10,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409055323] [2022-10-15 17:59:10,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409055323] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:59:10,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:59:10,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 17:59:10,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878949394] [2022-10-15 17:59:10,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:59:10,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 17:59:10,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:10,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 17:59:10,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:59:10,884 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 17:59:11,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:11,013 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-10-15 17:59:11,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 17:59:11,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-10-15 17:59:11,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:11,017 INFO L225 Difference]: With dead ends: 48 [2022-10-15 17:59:11,017 INFO L226 Difference]: Without dead ends: 48 [2022-10-15 17:59:11,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:59:11,019 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 23 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:11,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 79 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:59:11,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-10-15 17:59:11,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-10-15 17:59:11,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 38 states have internal predecessors, (43), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-10-15 17:59:11,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-10-15 17:59:11,040 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 17 [2022-10-15 17:59:11,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:11,041 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-10-15 17:59:11,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 17:59:11,041 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-10-15 17:59:11,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-15 17:59:11,042 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:11,043 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:11,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 17:59:11,043 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting new_llErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-15 17:59:11,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:11,044 INFO L85 PathProgramCache]: Analyzing trace with hash 933917619, now seen corresponding path program 1 times [2022-10-15 17:59:11,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:11,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352062499] [2022-10-15 17:59:11,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:11,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:11,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 17:59:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:59:11,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:11,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352062499] [2022-10-15 17:59:11,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352062499] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:59:11,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:59:11,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 17:59:11,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724147202] [2022-10-15 17:59:11,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:59:11,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 17:59:11,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:11,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 17:59:11,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:59:11,268 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 17:59:11,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:11,408 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2022-10-15 17:59:11,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 17:59:11,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-10-15 17:59:11,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:11,413 INFO L225 Difference]: With dead ends: 50 [2022-10-15 17:59:11,413 INFO L226 Difference]: Without dead ends: 50 [2022-10-15 17:59:11,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:59:11,419 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 22 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:11,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 87 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:59:11,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-10-15 17:59:11,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2022-10-15 17:59:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.5) internal successors, (42), 38 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-10-15 17:59:11,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-10-15 17:59:11,433 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 13 [2022-10-15 17:59:11,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:11,434 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-10-15 17:59:11,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 17:59:11,435 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-10-15 17:59:11,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-15 17:59:11,440 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:11,440 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:11,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-15 17:59:11,443 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-15 17:59:11,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:11,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1968085860, now seen corresponding path program 1 times [2022-10-15 17:59:11,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:11,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552247311] [2022-10-15 17:59:11,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:11,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:11,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:11,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-15 17:59:11,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 17:59:11,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:11,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552247311] [2022-10-15 17:59:11,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552247311] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:11,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033351189] [2022-10-15 17:59:11,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:11,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:11,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:11,828 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) [2022-10-15 17:59:11,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 17:59:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:11,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 17:59:11,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 17:59:12,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 17:59:12,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033351189] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:59:12,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 17:59:12,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-10-15 17:59:12,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293824596] [2022-10-15 17:59:12,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:59:12,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 17:59:12,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:12,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 17:59:12,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-10-15 17:59:12,010 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-15 17:59:12,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:12,066 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2022-10-15 17:59:12,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 17:59:12,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-10-15 17:59:12,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:12,071 INFO L225 Difference]: With dead ends: 47 [2022-10-15 17:59:12,071 INFO L226 Difference]: Without dead ends: 47 [2022-10-15 17:59:12,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-10-15 17:59:12,084 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 28 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:12,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 137 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:59:12,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-10-15 17:59:12,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-10-15 17:59:12,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.5) internal successors, (42), 38 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-10-15 17:59:12,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-10-15 17:59:12,100 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 17 [2022-10-15 17:59:12,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:12,103 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-10-15 17:59:12,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-15 17:59:12,103 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-10-15 17:59:12,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-15 17:59:12,106 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:12,106 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:12,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-15 17:59:12,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-15 17:59:12,322 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-15 17:59:12,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:12,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1735276007, now seen corresponding path program 1 times [2022-10-15 17:59:12,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:12,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550270052] [2022-10-15 17:59:12,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:12,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:12,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:12,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-15 17:59:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:12,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-15 17:59:12,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:12,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550270052] [2022-10-15 17:59:12,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550270052] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:12,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49141097] [2022-10-15 17:59:12,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:12,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:12,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:12,598 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) [2022-10-15 17:59:12,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 17:59:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:12,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-15 17:59:12,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 17:59:12,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:59:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 17:59:13,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49141097] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:59:13,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:59:13,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 17 [2022-10-15 17:59:13,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019121219] [2022-10-15 17:59:13,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:59:13,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 17:59:13,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:13,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 17:59:13,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-10-15 17:59:13,105 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-15 17:59:13,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:13,552 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2022-10-15 17:59:13,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-15 17:59:13,554 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2022-10-15 17:59:13,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:13,556 INFO L225 Difference]: With dead ends: 79 [2022-10-15 17:59:13,556 INFO L226 Difference]: Without dead ends: 77 [2022-10-15 17:59:13,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2022-10-15 17:59:13,558 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 91 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:13,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 224 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 17:59:13,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-10-15 17:59:13,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2022-10-15 17:59:13,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 46 states have internal predecessors, (51), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-10-15 17:59:13,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-10-15 17:59:13,567 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 27 [2022-10-15 17:59:13,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:13,568 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-10-15 17:59:13,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-15 17:59:13,568 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-10-15 17:59:13,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-15 17:59:13,569 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:13,570 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:13,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 17:59:13,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-15 17:59:13,786 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-15 17:59:13,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:13,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1313212510, now seen corresponding path program 1 times [2022-10-15 17:59:13,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:13,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608182093] [2022-10-15 17:59:13,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:13,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:14,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-15 17:59:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:14,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 17:59:14,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:14,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608182093] [2022-10-15 17:59:14,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608182093] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:14,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979368452] [2022-10-15 17:59:14,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:14,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:14,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:14,193 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) [2022-10-15 17:59:14,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 17:59:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:14,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 17:59:14,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:14,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-10-15 17:59:14,400 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-10-15 17:59:14,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-10-15 17:59:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 17:59:14,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:59:14,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979368452] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:14,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:59:14,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 7 [2022-10-15 17:59:14,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128544228] [2022-10-15 17:59:14,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:59:14,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 17:59:14,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:14,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 17:59:14,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-10-15 17:59:14,535 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-15 17:59:14,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:14,685 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-10-15 17:59:14,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 17:59:14,686 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2022-10-15 17:59:14,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:14,687 INFO L225 Difference]: With dead ends: 60 [2022-10-15 17:59:14,687 INFO L226 Difference]: Without dead ends: 60 [2022-10-15 17:59:14,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-10-15 17:59:14,689 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 22 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:14,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 115 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 70 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-10-15 17:59:14,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-10-15 17:59:14,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-10-15 17:59:14,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 46 states have internal predecessors, (53), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-10-15 17:59:14,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2022-10-15 17:59:14,697 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 25 [2022-10-15 17:59:14,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:14,698 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2022-10-15 17:59:14,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-15 17:59:14,698 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2022-10-15 17:59:14,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-15 17:59:14,699 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:14,699 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:14,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 17:59:14,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:14,916 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting new_llErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-15 17:59:14,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:14,917 INFO L85 PathProgramCache]: Analyzing trace with hash -892169589, now seen corresponding path program 1 times [2022-10-15 17:59:14,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:14,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206425441] [2022-10-15 17:59:14,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:14,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:15,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 17:59:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:15,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:15,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 17:59:15,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:15,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206425441] [2022-10-15 17:59:15,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206425441] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:15,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443559444] [2022-10-15 17:59:15,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:15,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:15,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:15,287 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) [2022-10-15 17:59:15,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 17:59:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:15,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-15 17:59:15,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:15,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-10-15 17:59:15,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-10-15 17:59:15,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:59:15,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-10-15 17:59:15,555 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-15 17:59:15,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 11 [2022-10-15 17:59:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:59:15,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:59:19,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443559444] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:19,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:59:19,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-10-15 17:59:19,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768111890] [2022-10-15 17:59:19,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:59:19,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 17:59:19,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:19,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 17:59:19,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-10-15 17:59:19,759 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 17:59:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:19,968 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2022-10-15 17:59:19,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 17:59:19,969 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2022-10-15 17:59:19,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:19,970 INFO L225 Difference]: With dead ends: 59 [2022-10-15 17:59:19,970 INFO L226 Difference]: Without dead ends: 59 [2022-10-15 17:59:19,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-10-15 17:59:19,972 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 11 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:19,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 166 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-10-15 17:59:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-10-15 17:59:19,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-10-15 17:59:19,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 46 states have internal predecessors, (52), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-10-15 17:59:19,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-10-15 17:59:19,980 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 21 [2022-10-15 17:59:19,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:19,980 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-10-15 17:59:19,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 17:59:19,981 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-10-15 17:59:19,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-15 17:59:19,982 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:19,982 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:20,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 17:59:20,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:20,196 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-15 17:59:20,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:20,198 INFO L85 PathProgramCache]: Analyzing trace with hash -991577478, now seen corresponding path program 2 times [2022-10-15 17:59:20,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:20,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680761339] [2022-10-15 17:59:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:20,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:20,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-15 17:59:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:20,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:20,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:20,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:20,921 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-15 17:59:20,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:20,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680761339] [2022-10-15 17:59:20,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680761339] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:20,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749659387] [2022-10-15 17:59:20,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:59:20,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:20,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:20,942 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) [2022-10-15 17:59:20,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 17:59:21,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 17:59:21,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:59:21,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 17:59:21,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:21,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-10-15 17:59:21,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-15 17:59:21,269 INFO L356 Elim1Store]: treesize reduction 30, result has 33.3 percent of original size [2022-10-15 17:59:21,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-10-15 17:59:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-15 17:59:21,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:59:21,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749659387] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:21,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:59:21,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-10-15 17:59:21,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994676339] [2022-10-15 17:59:21,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:59:21,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-15 17:59:21,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:21,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-15 17:59:21,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2022-10-15 17:59:21,525 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-15 17:59:21,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:21,750 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2022-10-15 17:59:21,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 17:59:21,751 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 33 [2022-10-15 17:59:21,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:21,752 INFO L225 Difference]: With dead ends: 64 [2022-10-15 17:59:21,753 INFO L226 Difference]: Without dead ends: 64 [2022-10-15 17:59:21,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2022-10-15 17:59:21,754 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 54 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:21,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 151 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 93 Invalid, 0 Unknown, 119 Unchecked, 0.1s Time] [2022-10-15 17:59:21,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-10-15 17:59:21,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-10-15 17:59:21,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.4) internal successors, (56), 49 states have internal predecessors, (56), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (15), 9 states have call predecessors, (15), 7 states have call successors, (15) [2022-10-15 17:59:21,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2022-10-15 17:59:21,762 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 33 [2022-10-15 17:59:21,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:21,763 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2022-10-15 17:59:21,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-15 17:59:21,763 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2022-10-15 17:59:21,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-15 17:59:21,764 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:21,765 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:21,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 17:59:21,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-15 17:59:21,980 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting new_llErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-15 17:59:21,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:21,982 INFO L85 PathProgramCache]: Analyzing trace with hash -825692829, now seen corresponding path program 2 times [2022-10-15 17:59:21,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:21,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087526068] [2022-10-15 17:59:21,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:21,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:22,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 17:59:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:22,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:22,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 17:59:22,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:22,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087526068] [2022-10-15 17:59:22,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087526068] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:22,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298323963] [2022-10-15 17:59:22,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:59:22,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:22,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:22,797 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:59:22,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 17:59:22,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 17:59:22,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:59:22,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 27 conjunts are in the unsatisfiable core [2022-10-15 17:59:22,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:22,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-10-15 17:59:22,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-10-15 17:59:23,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:59:23,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:59:23,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:59:23,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-10-15 17:59:23,246 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-10-15 17:59:23,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-10-15 17:59:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 17:59:23,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:59:23,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298323963] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:23,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:59:23,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-10-15 17:59:23,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932099535] [2022-10-15 17:59:23,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:59:23,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 17:59:23,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:23,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 17:59:23,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-10-15 17:59:23,500 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 17 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 17:59:23,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:23,978 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2022-10-15 17:59:23,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-15 17:59:23,979 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 29 [2022-10-15 17:59:23,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:23,980 INFO L225 Difference]: With dead ends: 63 [2022-10-15 17:59:23,981 INFO L226 Difference]: Without dead ends: 63 [2022-10-15 17:59:23,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-10-15 17:59:23,982 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 37 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:23,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 174 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 141 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-10-15 17:59:23,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-10-15 17:59:23,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-10-15 17:59:23,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.375) internal successors, (55), 49 states have internal predecessors, (55), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (15), 9 states have call predecessors, (15), 7 states have call successors, (15) [2022-10-15 17:59:23,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2022-10-15 17:59:23,989 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 29 [2022-10-15 17:59:23,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:23,990 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2022-10-15 17:59:23,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 17:59:23,990 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2022-10-15 17:59:23,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-15 17:59:23,992 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:23,992 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:24,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 17:59:24,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:24,206 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-15 17:59:24,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:24,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1497578812, now seen corresponding path program 1 times [2022-10-15 17:59:24,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:24,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827209115] [2022-10-15 17:59:24,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:24,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:24,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:24,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-15 17:59:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:24,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-15 17:59:24,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:24,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827209115] [2022-10-15 17:59:24,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827209115] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:24,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162003971] [2022-10-15 17:59:24,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:24,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:24,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:24,378 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:59:24,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 17:59:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:24,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 21 conjunts are in the unsatisfiable core [2022-10-15 17:59:24,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-15 17:59:24,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:59:24,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-15 17:59:24,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162003971] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:59:24,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:59:24,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 9 [2022-10-15 17:59:24,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913293588] [2022-10-15 17:59:24,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:59:24,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 17:59:24,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:24,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 17:59:24,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-10-15 17:59:24,553 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-15 17:59:24,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:24,732 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2022-10-15 17:59:24,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-15 17:59:24,733 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2022-10-15 17:59:24,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:24,734 INFO L225 Difference]: With dead ends: 75 [2022-10-15 17:59:24,734 INFO L226 Difference]: Without dead ends: 75 [2022-10-15 17:59:24,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-10-15 17:59:24,735 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 31 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:24,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 175 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:59:24,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-10-15 17:59:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2022-10-15 17:59:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 50 states have internal predecessors, (57), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (15), 10 states have call predecessors, (15), 7 states have call successors, (15) [2022-10-15 17:59:24,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2022-10-15 17:59:24,742 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 25 [2022-10-15 17:59:24,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:24,742 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2022-10-15 17:59:24,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-15 17:59:24,743 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2022-10-15 17:59:24,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-10-15 17:59:24,744 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:24,744 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:24,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 17:59:24,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:24,959 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-15 17:59:24,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:24,960 INFO L85 PathProgramCache]: Analyzing trace with hash -611206830, now seen corresponding path program 3 times [2022-10-15 17:59:24,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:24,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469541832] [2022-10-15 17:59:24,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:24,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:24,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:25,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-15 17:59:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:25,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:26,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:27,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 32 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-15 17:59:27,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:27,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469541832] [2022-10-15 17:59:27,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469541832] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:27,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575856082] [2022-10-15 17:59:27,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 17:59:27,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:27,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:27,066 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:59:27,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-15 17:59:27,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-10-15 17:59:27,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:59:27,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 21 conjunts are in the unsatisfiable core [2022-10-15 17:59:27,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:27,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-10-15 17:59:27,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-15 17:59:27,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-15 17:59:27,830 INFO L356 Elim1Store]: treesize reduction 62, result has 30.3 percent of original size [2022-10-15 17:59:27,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 35 [2022-10-15 17:59:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-15 17:59:27,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:59:28,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575856082] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:28,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:59:28,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2022-10-15 17:59:28,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333223645] [2022-10-15 17:59:28,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:59:28,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-10-15 17:59:28,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:28,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-10-15 17:59:28,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2022-10-15 17:59:28,228 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-10-15 17:59:28,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:28,694 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2022-10-15 17:59:28,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 17:59:28,695 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 41 [2022-10-15 17:59:28,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:28,696 INFO L225 Difference]: With dead ends: 70 [2022-10-15 17:59:28,696 INFO L226 Difference]: Without dead ends: 70 [2022-10-15 17:59:28,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2022-10-15 17:59:28,699 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 65 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:28,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 206 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 170 Invalid, 0 Unknown, 173 Unchecked, 0.3s Time] [2022-10-15 17:59:28,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-10-15 17:59:28,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-10-15 17:59:28,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 53 states have internal predecessors, (61), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (18), 11 states have call predecessors, (18), 7 states have call successors, (18) [2022-10-15 17:59:28,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2022-10-15 17:59:28,706 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 41 [2022-10-15 17:59:28,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:28,706 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2022-10-15 17:59:28,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-10-15 17:59:28,707 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2022-10-15 17:59:28,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-15 17:59:28,708 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:28,708 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:28,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-15 17:59:28,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-15 17:59:28,923 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting new_llErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-15 17:59:28,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:28,924 INFO L85 PathProgramCache]: Analyzing trace with hash 237470779, now seen corresponding path program 3 times [2022-10-15 17:59:28,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:28,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46680379] [2022-10-15 17:59:28,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:28,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:29,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 17:59:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:30,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:30,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:30,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-15 17:59:30,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:30,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46680379] [2022-10-15 17:59:30,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46680379] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:30,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303946690] [2022-10-15 17:59:30,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 17:59:30,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:30,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:30,983 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:59:31,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-15 17:59:31,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-10-15 17:59:31,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:59:31,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 26 conjunts are in the unsatisfiable core [2022-10-15 17:59:31,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:31,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-10-15 17:59:31,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-10-15 17:59:31,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:59:31,729 INFO L356 Elim1Store]: treesize reduction 56, result has 37.8 percent of original size [2022-10-15 17:59:31,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 18 treesize of output 42 [2022-10-15 17:59:31,744 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-15 17:59:31,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 11 [2022-10-15 17:59:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-15 17:59:31,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:59:32,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303946690] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:32,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:59:32,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2022-10-15 17:59:32,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175406930] [2022-10-15 17:59:32,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:59:32,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-10-15 17:59:32,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:32,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-10-15 17:59:32,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-10-15 17:59:32,134 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand has 22 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 20 states have internal predecessors, (44), 8 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-10-15 17:59:33,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:33,418 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2022-10-15 17:59:33,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-15 17:59:33,419 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 20 states have internal predecessors, (44), 8 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 37 [2022-10-15 17:59:33,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:33,420 INFO L225 Difference]: With dead ends: 72 [2022-10-15 17:59:33,420 INFO L226 Difference]: Without dead ends: 72 [2022-10-15 17:59:33,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2022-10-15 17:59:33,422 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 53 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:33,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 354 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 215 Invalid, 0 Unknown, 208 Unchecked, 0.3s Time] [2022-10-15 17:59:33,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-10-15 17:59:33,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-10-15 17:59:33,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 53 states have internal predecessors, (60), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (18), 11 states have call predecessors, (18), 7 states have call successors, (18) [2022-10-15 17:59:33,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2022-10-15 17:59:33,429 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 37 [2022-10-15 17:59:33,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:33,430 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2022-10-15 17:59:33,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 20 states have internal predecessors, (44), 8 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-10-15 17:59:33,430 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2022-10-15 17:59:33,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-15 17:59:33,431 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:33,431 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:33,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-15 17:59:33,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-10-15 17:59:33,646 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting lengthErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-15 17:59:33,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:33,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1550007791, now seen corresponding path program 1 times [2022-10-15 17:59:33,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:33,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455946313] [2022-10-15 17:59:33,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:33,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:33,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:33,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-15 17:59:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:33,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:33,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-15 17:59:33,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:33,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455946313] [2022-10-15 17:59:33,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455946313] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:59:33,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:59:33,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-10-15 17:59:33,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796614545] [2022-10-15 17:59:33,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:59:33,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 17:59:33,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:33,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 17:59:33,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-10-15 17:59:33,820 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 11 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-15 17:59:34,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:34,161 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2022-10-15 17:59:34,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 17:59:34,162 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-10-15 17:59:34,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:34,163 INFO L225 Difference]: With dead ends: 84 [2022-10-15 17:59:34,163 INFO L226 Difference]: Without dead ends: 84 [2022-10-15 17:59:34,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-10-15 17:59:34,164 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 61 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:34,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 169 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 17:59:34,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-10-15 17:59:34,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2022-10-15 17:59:34,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 60 states have internal predecessors, (68), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (20), 12 states have call predecessors, (20), 9 states have call successors, (20) [2022-10-15 17:59:34,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2022-10-15 17:59:34,170 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 29 [2022-10-15 17:59:34,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:34,171 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2022-10-15 17:59:34,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-15 17:59:34,171 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2022-10-15 17:59:34,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-15 17:59:34,172 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:34,172 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:34,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-10-15 17:59:34,173 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting lengthErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-15 17:59:34,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:34,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1550007792, now seen corresponding path program 1 times [2022-10-15 17:59:34,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:34,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270676182] [2022-10-15 17:59:34,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:34,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:34,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:34,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-15 17:59:34,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:34,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 17:59:34,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:34,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270676182] [2022-10-15 17:59:34,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270676182] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:34,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049724516] [2022-10-15 17:59:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:34,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:34,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:34,541 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:59:34,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-15 17:59:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:34,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 43 conjunts are in the unsatisfiable core [2022-10-15 17:59:34,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:34,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-10-15 17:59:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 17:59:34,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:59:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 17:59:35,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049724516] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:59:35,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:59:35,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2022-10-15 17:59:35,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386278594] [2022-10-15 17:59:35,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:59:35,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-10-15 17:59:35,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:35,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-10-15 17:59:35,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2022-10-15 17:59:35,278 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand has 29 states, 25 states have (on average 1.92) internal successors, (48), 22 states have internal predecessors, (48), 7 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-10-15 17:59:36,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:36,224 INFO L93 Difference]: Finished difference Result 116 states and 140 transitions. [2022-10-15 17:59:36,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-10-15 17:59:36,225 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 1.92) internal successors, (48), 22 states have internal predecessors, (48), 7 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 29 [2022-10-15 17:59:36,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:36,227 INFO L225 Difference]: With dead ends: 116 [2022-10-15 17:59:36,227 INFO L226 Difference]: Without dead ends: 116 [2022-10-15 17:59:36,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2022-10-15 17:59:36,230 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 133 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:36,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 440 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 668 Invalid, 0 Unknown, 34 Unchecked, 0.5s Time] [2022-10-15 17:59:36,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-10-15 17:59:36,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 78. [2022-10-15 17:59:36,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 60 states have internal predecessors, (67), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (20), 12 states have call predecessors, (20), 9 states have call successors, (20) [2022-10-15 17:59:36,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2022-10-15 17:59:36,246 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 29 [2022-10-15 17:59:36,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:36,246 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2022-10-15 17:59:36,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 1.92) internal successors, (48), 22 states have internal predecessors, (48), 7 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-10-15 17:59:36,247 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2022-10-15 17:59:36,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-10-15 17:59:36,250 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:36,250 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:36,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-15 17:59:36,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-10-15 17:59:36,465 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-15 17:59:36,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:36,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1776192452, now seen corresponding path program 2 times [2022-10-15 17:59:36,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:36,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994257063] [2022-10-15 17:59:36,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:36,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:36,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:36,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:36,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-15 17:59:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:36,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:36,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:36,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:36,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-10-15 17:59:36,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:36,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994257063] [2022-10-15 17:59:36,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994257063] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:36,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775639242] [2022-10-15 17:59:36,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:59:36,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:36,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:36,980 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:59:36,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-15 17:59:37,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 17:59:37,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:59:37,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-15 17:59:37,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-10-15 17:59:37,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:59:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 18 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-15 17:59:37,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775639242] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:59:37,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:59:37,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 21 [2022-10-15 17:59:37,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010471562] [2022-10-15 17:59:37,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:59:37,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-10-15 17:59:37,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:37,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-10-15 17:59:37,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-10-15 17:59:37,908 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 9 states have call successors, (11), 2 states have call predecessors, (11), 7 states have return successors, (14), 6 states have call predecessors, (14), 9 states have call successors, (14) [2022-10-15 17:59:38,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:38,245 INFO L93 Difference]: Finished difference Result 101 states and 124 transitions. [2022-10-15 17:59:38,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-15 17:59:38,246 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 9 states have call successors, (11), 2 states have call predecessors, (11), 7 states have return successors, (14), 6 states have call predecessors, (14), 9 states have call successors, (14) Word has length 49 [2022-10-15 17:59:38,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:38,248 INFO L225 Difference]: With dead ends: 101 [2022-10-15 17:59:38,248 INFO L226 Difference]: Without dead ends: 101 [2022-10-15 17:59:38,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 91 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2022-10-15 17:59:38,249 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 67 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:38,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 503 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 17:59:38,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-10-15 17:59:38,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 80. [2022-10-15 17:59:38,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 61 states have internal predecessors, (68), 10 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (22), 13 states have call predecessors, (22), 10 states have call successors, (22) [2022-10-15 17:59:38,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2022-10-15 17:59:38,256 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 49 [2022-10-15 17:59:38,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:38,256 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2022-10-15 17:59:38,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 9 states have call successors, (11), 2 states have call predecessors, (11), 7 states have return successors, (14), 6 states have call predecessors, (14), 9 states have call successors, (14) [2022-10-15 17:59:38,257 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2022-10-15 17:59:38,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-10-15 17:59:38,258 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:38,258 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:38,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-15 17:59:38,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-10-15 17:59:38,468 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-15 17:59:38,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:38,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2011969044, now seen corresponding path program 3 times [2022-10-15 17:59:38,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:38,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926170221] [2022-10-15 17:59:38,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:38,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:38,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:38,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:38,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:39,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-15 17:59:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:39,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:39,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-10-15 17:59:39,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:39,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926170221] [2022-10-15 17:59:39,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926170221] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:39,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216880941] [2022-10-15 17:59:39,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 17:59:39,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:39,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:39,481 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:59:39,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-15 17:59:39,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-10-15 17:59:39,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:59:39,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 51 conjunts are in the unsatisfiable core [2022-10-15 17:59:39,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:39,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-10-15 17:59:39,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-10-15 17:59:40,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:59:40,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:59:40,294 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-15 17:59:40,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2022-10-15 17:59:40,305 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-15 17:59:40,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-10-15 17:59:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-15 17:59:40,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:59:40,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216880941] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:40,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:59:40,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2022-10-15 17:59:40,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851120851] [2022-10-15 17:59:40,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:59:40,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-15 17:59:40,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:40,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-15 17:59:40,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2022-10-15 17:59:40,749 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand has 25 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2022-10-15 17:59:41,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:41,730 INFO L93 Difference]: Finished difference Result 115 states and 139 transitions. [2022-10-15 17:59:41,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-15 17:59:41,731 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) Word has length 41 [2022-10-15 17:59:41,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:41,733 INFO L225 Difference]: With dead ends: 115 [2022-10-15 17:59:41,733 INFO L226 Difference]: Without dead ends: 115 [2022-10-15 17:59:41,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2022-10-15 17:59:41,736 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 54 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:41,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 589 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 545 Invalid, 0 Unknown, 306 Unchecked, 0.4s Time] [2022-10-15 17:59:41,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-10-15 17:59:41,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 86. [2022-10-15 17:59:41,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 66 states have internal predecessors, (79), 10 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (22), 14 states have call predecessors, (22), 10 states have call successors, (22) [2022-10-15 17:59:41,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 111 transitions. [2022-10-15 17:59:41,743 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 111 transitions. Word has length 41 [2022-10-15 17:59:41,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:41,743 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 111 transitions. [2022-10-15 17:59:41,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2022-10-15 17:59:41,744 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 111 transitions. [2022-10-15 17:59:41,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-15 17:59:41,745 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:41,745 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:41,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-15 17:59:41,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-10-15 17:59:41,959 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-15 17:59:41,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:41,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1837188115, now seen corresponding path program 1 times [2022-10-15 17:59:41,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:41,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188703415] [2022-10-15 17:59:41,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:41,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:41,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:42,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:42,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:42,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:42,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-15 17:59:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:42,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-15 17:59:42,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:42,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188703415] [2022-10-15 17:59:42,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188703415] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:42,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426672555] [2022-10-15 17:59:42,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:42,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:42,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:42,188 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:59:42,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-15 17:59:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:42,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-15 17:59:42,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-15 17:59:42,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:59:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-15 17:59:42,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426672555] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:59:42,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:59:42,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 17 [2022-10-15 17:59:42,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802019464] [2022-10-15 17:59:42,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:59:42,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 17:59:42,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:42,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 17:59:42,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-10-15 17:59:42,670 INFO L87 Difference]: Start difference. First operand 86 states and 111 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) [2022-10-15 17:59:42,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:42,955 INFO L93 Difference]: Finished difference Result 97 states and 126 transitions. [2022-10-15 17:59:42,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-15 17:59:42,956 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) Word has length 33 [2022-10-15 17:59:42,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:42,958 INFO L225 Difference]: With dead ends: 97 [2022-10-15 17:59:42,958 INFO L226 Difference]: Without dead ends: 97 [2022-10-15 17:59:42,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2022-10-15 17:59:42,960 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 65 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:42,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 311 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 17:59:42,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-10-15 17:59:42,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2022-10-15 17:59:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 60 states have (on average 1.35) internal successors, (81), 67 states have internal predecessors, (81), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (20), 14 states have call predecessors, (20), 10 states have call successors, (20) [2022-10-15 17:59:42,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 111 transitions. [2022-10-15 17:59:42,968 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 111 transitions. Word has length 33 [2022-10-15 17:59:42,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:42,968 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 111 transitions. [2022-10-15 17:59:42,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) [2022-10-15 17:59:42,969 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 111 transitions. [2022-10-15 17:59:42,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-10-15 17:59:42,969 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:42,970 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:43,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-10-15 17:59:43,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:43,184 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-15 17:59:43,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:43,185 INFO L85 PathProgramCache]: Analyzing trace with hash -2011969045, now seen corresponding path program 2 times [2022-10-15 17:59:43,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:43,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799644455] [2022-10-15 17:59:43,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:43,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:43,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:43,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:43,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-15 17:59:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:43,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:43,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:43,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:43,883 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 21 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-15 17:59:43,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:43,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799644455] [2022-10-15 17:59:43,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799644455] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:43,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267437209] [2022-10-15 17:59:43,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:59:43,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:43,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:43,885 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:59:43,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-10-15 17:59:44,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 17:59:44,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:59:44,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 28 conjunts are in the unsatisfiable core [2022-10-15 17:59:44,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:44,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-10-15 17:59:44,257 INFO L356 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-10-15 17:59:44,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 30 [2022-10-15 17:59:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-15 17:59:44,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:59:44,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267437209] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:44,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:59:44,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 16 [2022-10-15 17:59:44,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372507460] [2022-10-15 17:59:44,362 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:59:44,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 17:59:44,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:44,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 17:59:44,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-10-15 17:59:44,364 INFO L87 Difference]: Start difference. First operand 88 states and 111 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 7 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-10-15 17:59:44,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:44,781 INFO L93 Difference]: Finished difference Result 110 states and 132 transitions. [2022-10-15 17:59:44,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-15 17:59:44,782 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 7 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 41 [2022-10-15 17:59:44,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:44,784 INFO L225 Difference]: With dead ends: 110 [2022-10-15 17:59:44,784 INFO L226 Difference]: Without dead ends: 110 [2022-10-15 17:59:44,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-10-15 17:59:44,786 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 80 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:44,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 164 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 285 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-10-15 17:59:44,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-10-15 17:59:44,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2022-10-15 17:59:44,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 67 states have internal predecessors, (81), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (20), 15 states have call predecessors, (20), 10 states have call successors, (20) [2022-10-15 17:59:44,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2022-10-15 17:59:44,793 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 41 [2022-10-15 17:59:44,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:44,793 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2022-10-15 17:59:44,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 7 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-10-15 17:59:44,794 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2022-10-15 17:59:44,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-15 17:59:44,794 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:44,795 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:44,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-10-15 17:59:45,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:45,009 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-15 17:59:45,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:45,010 INFO L85 PathProgramCache]: Analyzing trace with hash -561490158, now seen corresponding path program 4 times [2022-10-15 17:59:45,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:45,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972132994] [2022-10-15 17:59:45,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:45,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:45,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:45,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 17:59:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:46,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat