./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c --full-output --preprocessor.use.memory.slicer true --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1 --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 17:01:37,909 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 17:01:37,964 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-22 17:01:37,980 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 17:01:37,981 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 17:01:38,008 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 17:01:38,008 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 17:01:38,009 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 17:01:38,009 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 17:01:38,012 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 17:01:38,013 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 17:01:38,013 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 17:01:38,013 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 17:01:38,014 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 17:01:38,015 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 17:01:38,015 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 17:01:38,015 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 17:01:38,015 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 17:01:38,015 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-22 17:01:38,016 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-22 17:01:38,016 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-22 17:01:38,016 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 17:01:38,016 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-22 17:01:38,017 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-22 17:01:38,017 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 17:01:38,017 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 17:01:38,017 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 17:01:38,018 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 17:01:38,018 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 17:01:38,018 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 17:01:38,019 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 17:01:38,019 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 17:01:38,019 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 17:01:38,019 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 17:01:38,019 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 17:01:38,020 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 17:01:38,020 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 17:01:38,020 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 17:01:38,020 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 17:01:38,020 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-22 17:01:38,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 17:01:38,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 17:01:38,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 17:01:38,298 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 17:01:38,298 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 17:01:38,299 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c [2023-11-22 17:01:39,434 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 17:01:39,554 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 17:01:39,554 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c [2023-11-22 17:01:39,559 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f20842250/b98e5110088e4d0ba410b24831b17836/FLAGd4dfeab85 [2023-11-22 17:01:39,569 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f20842250/b98e5110088e4d0ba410b24831b17836 [2023-11-22 17:01:39,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 17:01:39,572 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 17:01:39,573 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 17:01:39,573 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 17:01:39,576 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 17:01:39,577 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 05:01:39" (1/1) ... [2023-11-22 17:01:39,577 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bdeeda4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:39, skipping insertion in model container [2023-11-22 17:01:39,578 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 05:01:39" (1/1) ... [2023-11-22 17:01:39,591 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 17:01:39,690 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 17:01:39,698 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 17:01:39,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 17:01:39,721 INFO L206 MainTranslator]: Completed translation [2023-11-22 17:01:39,721 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:39 WrapperNode [2023-11-22 17:01:39,721 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 17:01:39,722 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 17:01:39,722 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 17:01:39,722 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 17:01:39,727 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:39" (1/1) ... [2023-11-22 17:01:39,733 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:39" (1/1) ... [2023-11-22 17:01:39,745 INFO L138 Inliner]: procedures = 19, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 45 [2023-11-22 17:01:39,745 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 17:01:39,746 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 17:01:39,746 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 17:01:39,746 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 17:01:39,754 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:39" (1/1) ... [2023-11-22 17:01:39,754 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:39" (1/1) ... [2023-11-22 17:01:39,756 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:39" (1/1) ... [2023-11-22 17:01:39,763 INFO L189 HeapSplitter]: Split 8 memory accesses to 2 slices as follows [2, 6] [2023-11-22 17:01:39,764 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:39" (1/1) ... [2023-11-22 17:01:39,764 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:39" (1/1) ... [2023-11-22 17:01:39,768 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:39" (1/1) ... [2023-11-22 17:01:39,769 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:39" (1/1) ... [2023-11-22 17:01:39,770 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:39" (1/1) ... [2023-11-22 17:01:39,771 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:39" (1/1) ... [2023-11-22 17:01:39,772 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 17:01:39,773 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 17:01:39,773 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 17:01:39,773 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 17:01:39,774 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:39" (1/1) ... [2023-11-22 17:01:39,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 17:01:39,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:01:39,801 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) [2023-11-22 17:01:39,841 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 [2023-11-22 17:01:39,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 17:01:39,861 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-22 17:01:39,861 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-22 17:01:39,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 17:01:39,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-22 17:01:39,862 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-11-22 17:01:39,862 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-11-22 17:01:39,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-22 17:01:39,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 17:01:39,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 17:01:39,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-22 17:01:39,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-22 17:01:39,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-22 17:01:39,864 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-22 17:01:39,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 17:01:39,940 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 17:01:39,941 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 17:01:40,152 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 17:01:40,183 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 17:01:40,184 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-22 17:01:40,184 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 05:01:40 BoogieIcfgContainer [2023-11-22 17:01:40,184 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 17:01:40,186 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 17:01:40,186 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 17:01:40,188 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 17:01:40,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 05:01:39" (1/3) ... [2023-11-22 17:01:40,189 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@457a7943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 05:01:40, skipping insertion in model container [2023-11-22 17:01:40,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:01:39" (2/3) ... [2023-11-22 17:01:40,189 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@457a7943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 05:01:40, skipping insertion in model container [2023-11-22 17:01:40,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 05:01:40" (3/3) ... [2023-11-22 17:01:40,190 INFO L112 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2023-11-22 17:01:40,203 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 17:01:40,203 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2023-11-22 17:01:40,232 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 17:01:40,237 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=PETRI_NET, 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;@18fcf69b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 17:01:40,237 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-11-22 17:01:40,241 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 28 states have (on average 1.75) internal successors, (49), 45 states have internal predecessors, (49), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-22 17:01:40,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-22 17:01:40,246 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:01:40,247 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:01:40,248 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-22 17:01:40,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:01:40,252 INFO L85 PathProgramCache]: Analyzing trace with hash -479782134, now seen corresponding path program 1 times [2023-11-22 17:01:40,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:01:40,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555061108] [2023-11-22 17:01:40,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:01:40,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:01:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:40,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 17:01:40,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:40,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:01:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:40,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 17:01:40,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:01:40,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555061108] [2023-11-22 17:01:40,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555061108] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:01:40,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:01:40,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 17:01:40,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679272169] [2023-11-22 17:01:40,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:01:40,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-22 17:01:40,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:01:40,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-22 17:01:40,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 17:01:40,414 INFO L87 Difference]: Start difference. First operand has 57 states, 28 states have (on average 1.75) internal successors, (49), 45 states have internal predecessors, (49), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-22 17:01:40,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:01:40,456 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2023-11-22 17:01:40,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-22 17:01:40,458 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-11-22 17:01:40,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:01:40,464 INFO L225 Difference]: With dead ends: 57 [2023-11-22 17:01:40,464 INFO L226 Difference]: Without dead ends: 56 [2023-11-22 17:01:40,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 17:01:40,469 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 17:01:40,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 17:01:40,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-22 17:01:40,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-22 17:01:40,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 44 states have internal predecessors, (46), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-22 17:01:40,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2023-11-22 17:01:40,505 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 20 [2023-11-22 17:01:40,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:01:40,505 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2023-11-22 17:01:40,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-22 17:01:40,506 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2023-11-22 17:01:40,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-22 17:01:40,507 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:01:40,508 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:01:40,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 17:01:40,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-22 17:01:40,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:01:40,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1367065458, now seen corresponding path program 1 times [2023-11-22 17:01:40,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:01:40,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183899075] [2023-11-22 17:01:40,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:01:40,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:01:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:40,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 17:01:40,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:40,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:01:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 17:01:40,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:01:40,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183899075] [2023-11-22 17:01:40,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183899075] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:01:40,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:01:40,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-22 17:01:40,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626941444] [2023-11-22 17:01:40,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:01:40,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 17:01:40,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:01:40,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 17:01:40,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-22 17:01:40,819 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 17:01:41,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:01:41,031 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2023-11-22 17:01:41,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 17:01:41,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-11-22 17:01:41,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:01:41,036 INFO L225 Difference]: With dead ends: 96 [2023-11-22 17:01:41,036 INFO L226 Difference]: Without dead ends: 96 [2023-11-22 17:01:41,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-22 17:01:41,038 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 45 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 17:01:41,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 239 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 17:01:41,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-22 17:01:41,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2023-11-22 17:01:41,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 59 states have internal predecessors, (70), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-22 17:01:41,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 96 transitions. [2023-11-22 17:01:41,049 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 96 transitions. Word has length 20 [2023-11-22 17:01:41,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:01:41,049 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 96 transitions. [2023-11-22 17:01:41,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 17:01:41,050 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 96 transitions. [2023-11-22 17:01:41,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-22 17:01:41,050 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:01:41,050 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:01:41,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 17:01:41,051 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-22 17:01:41,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:01:41,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1368600300, now seen corresponding path program 1 times [2023-11-22 17:01:41,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:01:41,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106101455] [2023-11-22 17:01:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:01:41,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:01:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:41,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 17:01:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:41,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:01:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:41,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 17:01:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:41,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 17:01:41,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:01:41,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106101455] [2023-11-22 17:01:41,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106101455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:01:41,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:01:41,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 17:01:41,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275292709] [2023-11-22 17:01:41,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:01:41,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 17:01:41,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:01:41,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 17:01:41,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 17:01:41,115 INFO L87 Difference]: Start difference. First operand 77 states and 96 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 17:01:41,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:01:41,142 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2023-11-22 17:01:41,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 17:01:41,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2023-11-22 17:01:41,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:01:41,143 INFO L225 Difference]: With dead ends: 74 [2023-11-22 17:01:41,144 INFO L226 Difference]: Without dead ends: 74 [2023-11-22 17:01:41,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 17:01:41,145 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 8 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 17:01:41,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 82 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 17:01:41,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-22 17:01:41,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-11-22 17:01:41,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 56 states have internal predecessors, (67), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-22 17:01:41,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2023-11-22 17:01:41,152 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 20 [2023-11-22 17:01:41,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:01:41,153 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2023-11-22 17:01:41,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 17:01:41,153 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2023-11-22 17:01:41,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-22 17:01:41,154 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:01:41,154 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:01:41,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 17:01:41,154 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-22 17:01:41,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:01:41,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1368600299, now seen corresponding path program 1 times [2023-11-22 17:01:41,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:01:41,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720610366] [2023-11-22 17:01:41,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:01:41,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:01:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:41,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 17:01:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:41,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:01:41,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:41,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 17:01:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 17:01:41,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:01:41,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720610366] [2023-11-22 17:01:41,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720610366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:01:41,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:01:41,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-22 17:01:41,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432987170] [2023-11-22 17:01:41,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:01:41,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-22 17:01:41,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:01:41,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-22 17:01:41,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-22 17:01:41,575 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 17:01:41,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:01:41,773 INFO L93 Difference]: Finished difference Result 79 states and 100 transitions. [2023-11-22 17:01:41,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-22 17:01:41,773 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2023-11-22 17:01:41,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:01:41,774 INFO L225 Difference]: With dead ends: 79 [2023-11-22 17:01:41,774 INFO L226 Difference]: Without dead ends: 79 [2023-11-22 17:01:41,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-22 17:01:41,776 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 17:01:41,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 209 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 17:01:41,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-22 17:01:41,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2023-11-22 17:01:41,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 58 states have internal predecessors, (69), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2023-11-22 17:01:41,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2023-11-22 17:01:41,783 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 20 [2023-11-22 17:01:41,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:01:41,783 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2023-11-22 17:01:41,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 17:01:41,783 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2023-11-22 17:01:41,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-22 17:01:41,784 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:01:41,784 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:01:41,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-22 17:01:41,785 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-22 17:01:41,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:01:41,785 INFO L85 PathProgramCache]: Analyzing trace with hash 523066374, now seen corresponding path program 1 times [2023-11-22 17:01:41,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:01:41,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717709553] [2023-11-22 17:01:41,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:01:41,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:01:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:41,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 17:01:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:41,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:01:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:41,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 17:01:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:41,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 17:01:41,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:01:41,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717709553] [2023-11-22 17:01:41,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717709553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:01:41,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:01:41,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 17:01:41,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705877028] [2023-11-22 17:01:41,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:01:41,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 17:01:41,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:01:41,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 17:01:41,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-22 17:01:41,900 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 17:01:42,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:01:42,007 INFO L93 Difference]: Finished difference Result 106 states and 138 transitions. [2023-11-22 17:01:42,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 17:01:42,008 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-11-22 17:01:42,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:01:42,009 INFO L225 Difference]: With dead ends: 106 [2023-11-22 17:01:42,009 INFO L226 Difference]: Without dead ends: 106 [2023-11-22 17:01:42,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-22 17:01:42,010 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 36 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 17:01:42,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 239 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 17:01:42,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-22 17:01:42,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2023-11-22 17:01:42,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 59 states have internal predecessors, (70), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2023-11-22 17:01:42,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 98 transitions. [2023-11-22 17:01:42,018 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 98 transitions. Word has length 21 [2023-11-22 17:01:42,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:01:42,018 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 98 transitions. [2023-11-22 17:01:42,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 17:01:42,018 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 98 transitions. [2023-11-22 17:01:42,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-22 17:01:42,019 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:01:42,019 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:01:42,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-22 17:01:42,020 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-22 17:01:42,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:01:42,020 INFO L85 PathProgramCache]: Analyzing trace with hash -698788053, now seen corresponding path program 1 times [2023-11-22 17:01:42,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:01:42,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024742451] [2023-11-22 17:01:42,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:01:42,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:01:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:42,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 17:01:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:42,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:01:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:42,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 17:01:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 17:01:42,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:01:42,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024742451] [2023-11-22 17:01:42,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024742451] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:01:42,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:01:42,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-22 17:01:42,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448259452] [2023-11-22 17:01:42,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:01:42,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 17:01:42,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:01:42,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 17:01:42,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-22 17:01:42,214 INFO L87 Difference]: Start difference. First operand 78 states and 98 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 17:01:42,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:01:42,284 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2023-11-22 17:01:42,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 17:01:42,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2023-11-22 17:01:42,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:01:42,285 INFO L225 Difference]: With dead ends: 82 [2023-11-22 17:01:42,285 INFO L226 Difference]: Without dead ends: 82 [2023-11-22 17:01:42,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-11-22 17:01:42,286 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 26 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 17:01:42,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 292 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 17:01:42,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-22 17:01:42,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-11-22 17:01:42,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 49 states have (on average 1.489795918367347) internal successors, (73), 62 states have internal predecessors, (73), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2023-11-22 17:01:42,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2023-11-22 17:01:42,291 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 25 [2023-11-22 17:01:42,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:01:42,291 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2023-11-22 17:01:42,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 17:01:42,291 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2023-11-22 17:01:42,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-22 17:01:42,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:01:42,292 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:01:42,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-22 17:01:42,293 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-22 17:01:42,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:01:42,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1143605615, now seen corresponding path program 1 times [2023-11-22 17:01:42,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:01:42,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783459466] [2023-11-22 17:01:42,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:01:42,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:01:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:42,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 17:01:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:42,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:01:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:42,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 17:01:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:42,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 17:01:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:42,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 17:01:42,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:01:42,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783459466] [2023-11-22 17:01:42,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783459466] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:01:42,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985854269] [2023-11-22 17:01:42,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:01:42,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:01:42,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:01:42,442 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) [2023-11-22 17:01:42,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 17:01:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:42,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-22 17:01:42,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:01:42,571 INFO L378 Elim1Store]: Elim1 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 8 treesize of output 1 [2023-11-22 17:01:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 17:01:42,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:01:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 17:01:43,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985854269] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:01:43,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:01:43,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2023-11-22 17:01:43,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638796304] [2023-11-22 17:01:43,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:01:43,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-22 17:01:43,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:01:43,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-22 17:01:43,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-11-22 17:01:43,131 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 20 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-22 17:01:43,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:01:43,824 INFO L93 Difference]: Finished difference Result 128 states and 146 transitions. [2023-11-22 17:01:43,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-22 17:01:43,825 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 28 [2023-11-22 17:01:43,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:01:43,826 INFO L225 Difference]: With dead ends: 128 [2023-11-22 17:01:43,826 INFO L226 Difference]: Without dead ends: 128 [2023-11-22 17:01:43,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2023-11-22 17:01:43,827 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 283 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 17:01:43,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 193 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 17:01:43,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-22 17:01:43,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 85. [2023-11-22 17:01:43,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 64 states have internal predecessors, (75), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2023-11-22 17:01:43,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2023-11-22 17:01:43,833 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 28 [2023-11-22 17:01:43,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:01:43,833 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2023-11-22 17:01:43,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-22 17:01:43,834 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2023-11-22 17:01:43,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-22 17:01:43,834 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:01:43,834 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:01:43,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 17:01:44,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:01:44,047 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-22 17:01:44,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:01:44,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1143605616, now seen corresponding path program 1 times [2023-11-22 17:01:44,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:01:44,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341341775] [2023-11-22 17:01:44,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:01:44,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:01:44,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:44,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 17:01:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:44,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:01:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:44,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 17:01:44,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:44,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 17:01:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 17:01:44,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:01:44,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341341775] [2023-11-22 17:01:44,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341341775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:01:44,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:01:44,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 17:01:44,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347973159] [2023-11-22 17:01:44,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:01:44,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 17:01:44,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:01:44,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 17:01:44,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-22 17:01:44,094 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-22 17:01:44,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:01:44,146 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2023-11-22 17:01:44,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 17:01:44,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-11-22 17:01:44,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:01:44,147 INFO L225 Difference]: With dead ends: 81 [2023-11-22 17:01:44,147 INFO L226 Difference]: Without dead ends: 81 [2023-11-22 17:01:44,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-22 17:01:44,148 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 37 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 17:01:44,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 85 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 17:01:44,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-22 17:01:44,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-22 17:01:44,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 60 states have internal predecessors, (67), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2023-11-22 17:01:44,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2023-11-22 17:01:44,152 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 28 [2023-11-22 17:01:44,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:01:44,152 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2023-11-22 17:01:44,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-22 17:01:44,152 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2023-11-22 17:01:44,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-22 17:01:44,153 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:01:44,153 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:01:44,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-22 17:01:44,153 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-22 17:01:44,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:01:44,154 INFO L85 PathProgramCache]: Analyzing trace with hash 117433615, now seen corresponding path program 1 times [2023-11-22 17:01:44,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:01:44,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653540953] [2023-11-22 17:01:44,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:01:44,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:01:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:44,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 17:01:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:44,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:01:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:44,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 17:01:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:44,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 17:01:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:44,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 17:01:44,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:01:44,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653540953] [2023-11-22 17:01:44,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653540953] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:01:44,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:01:44,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 17:01:44,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636555574] [2023-11-22 17:01:44,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:01:44,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 17:01:44,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:01:44,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 17:01:44,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 17:01:44,184 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-22 17:01:44,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:01:44,197 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2023-11-22 17:01:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 17:01:44,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-11-22 17:01:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:01:44,198 INFO L225 Difference]: With dead ends: 80 [2023-11-22 17:01:44,198 INFO L226 Difference]: Without dead ends: 80 [2023-11-22 17:01:44,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 17:01:44,199 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 77 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 [2023-11-22 17:01:44,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 77 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 17:01:44,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-22 17:01:44,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-11-22 17:01:44,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 59 states have internal predecessors, (66), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2023-11-22 17:01:44,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2023-11-22 17:01:44,202 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 28 [2023-11-22 17:01:44,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:01:44,202 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2023-11-22 17:01:44,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-22 17:01:44,203 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2023-11-22 17:01:44,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-22 17:01:44,203 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:01:44,203 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:01:44,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-22 17:01:44,204 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-22 17:01:44,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:01:44,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1092035708, now seen corresponding path program 1 times [2023-11-22 17:01:44,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:01:44,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245168459] [2023-11-22 17:01:44,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:01:44,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:01:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:44,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 17:01:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:44,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:01:44,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:44,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 17:01:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:44,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 17:01:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 17:01:44,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:01:44,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245168459] [2023-11-22 17:01:44,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245168459] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:01:44,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687663311] [2023-11-22 17:01:44,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:01:44,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:01:44,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:01:44,451 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) [2023-11-22 17:01:44,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 17:01:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:44,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-22 17:01:44,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:01:44,543 INFO L378 Elim1Store]: Elim1 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 10 treesize of output 9 [2023-11-22 17:01:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 17:01:45,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:01:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 17:01:45,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687663311] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:01:45,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:01:45,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2023-11-22 17:01:45,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603208052] [2023-11-22 17:01:45,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:01:45,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 17:01:45,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:01:45,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 17:01:45,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-11-22 17:01:45,238 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 21 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-22 17:01:47,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 17:01:49,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 17:01:51,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 17:01:52,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:01:52,885 INFO L93 Difference]: Finished difference Result 199 states and 244 transitions. [2023-11-22 17:01:52,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-22 17:01:52,886 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 29 [2023-11-22 17:01:52,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:01:52,887 INFO L225 Difference]: With dead ends: 199 [2023-11-22 17:01:52,887 INFO L226 Difference]: Without dead ends: 199 [2023-11-22 17:01:52,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=322, Invalid=1570, Unknown=0, NotChecked=0, Total=1892 [2023-11-22 17:01:52,888 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 399 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 151 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-11-22 17:01:52,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 300 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 755 Invalid, 3 Unknown, 0 Unchecked, 6.7s Time] [2023-11-22 17:01:52,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-11-22 17:01:52,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 128. [2023-11-22 17:01:52,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 82 states have (on average 1.2926829268292683) internal successors, (106), 93 states have internal predecessors, (106), 29 states have call successors, (29), 9 states have call predecessors, (29), 10 states have return successors, (30), 25 states have call predecessors, (30), 29 states have call successors, (30) [2023-11-22 17:01:52,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 165 transitions. [2023-11-22 17:01:52,899 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 165 transitions. Word has length 29 [2023-11-22 17:01:52,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:01:52,901 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 165 transitions. [2023-11-22 17:01:52,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-22 17:01:52,901 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 165 transitions. [2023-11-22 17:01:52,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-22 17:01:52,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:01:52,906 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:01:52,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 17:01:53,120 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,SelfDestructingSolverStorable9 [2023-11-22 17:01:53,120 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-22 17:01:53,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:01:53,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1184556082, now seen corresponding path program 1 times [2023-11-22 17:01:53,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:01:53,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346170320] [2023-11-22 17:01:53,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:01:53,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:01:53,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:53,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 17:01:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:53,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:01:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:53,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 17:01:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:53,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 17:01:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 17:01:53,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:01:53,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346170320] [2023-11-22 17:01:53,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346170320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:01:53,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:01:53,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 17:01:53,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035022676] [2023-11-22 17:01:53,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:01:53,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 17:01:53,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:01:53,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 17:01:53,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 17:01:53,215 INFO L87 Difference]: Start difference. First operand 128 states and 165 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-22 17:01:53,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:01:53,251 INFO L93 Difference]: Finished difference Result 127 states and 164 transitions. [2023-11-22 17:01:53,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 17:01:53,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-11-22 17:01:53,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:01:53,254 INFO L225 Difference]: With dead ends: 127 [2023-11-22 17:01:53,254 INFO L226 Difference]: Without dead ends: 113 [2023-11-22 17:01:53,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 17:01:53,255 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 17:01:53,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 100 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 17:01:53,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-22 17:01:53,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-11-22 17:01:53,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 71 states have (on average 1.3098591549295775) internal successors, (93), 81 states have internal predecessors, (93), 28 states have call successors, (28), 8 states have call predecessors, (28), 8 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-22 17:01:53,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 149 transitions. [2023-11-22 17:01:53,267 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 149 transitions. Word has length 30 [2023-11-22 17:01:53,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:01:53,267 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 149 transitions. [2023-11-22 17:01:53,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-22 17:01:53,267 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 149 transitions. [2023-11-22 17:01:53,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-22 17:01:53,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:01:53,270 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:01:53,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-22 17:01:53,270 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-22 17:01:53,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:01:53,271 INFO L85 PathProgramCache]: Analyzing trace with hash -85974532, now seen corresponding path program 1 times [2023-11-22 17:01:53,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:01:53,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27214960] [2023-11-22 17:01:53,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:01:53,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:01:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:53,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 17:01:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:53,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:01:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:53,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 17:01:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:53,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 17:01:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 17:01:53,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:01:53,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27214960] [2023-11-22 17:01:53,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27214960] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:01:53,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852064357] [2023-11-22 17:01:53,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:01:53,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:01:53,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:01:53,433 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) [2023-11-22 17:01:53,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 17:01:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:53,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-22 17:01:53,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:01:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 17:01:53,569 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 17:01:53,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852064357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:01:53,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 17:01:53,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12 [2023-11-22 17:01:53,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978857849] [2023-11-22 17:01:53,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:01:53,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 17:01:53,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:01:53,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 17:01:53,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-22 17:01:53,573 INFO L87 Difference]: Start difference. First operand 113 states and 149 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-22 17:01:53,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:01:53,730 INFO L93 Difference]: Finished difference Result 135 states and 173 transitions. [2023-11-22 17:01:53,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-22 17:01:53,731 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2023-11-22 17:01:53,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:01:53,732 INFO L225 Difference]: With dead ends: 135 [2023-11-22 17:01:53,732 INFO L226 Difference]: Without dead ends: 135 [2023-11-22 17:01:53,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-11-22 17:01:53,733 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 65 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 17:01:53,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 180 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 17:01:53,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-22 17:01:53,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 117. [2023-11-22 17:01:53,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 74 states have (on average 1.2972972972972974) internal successors, (96), 84 states have internal predecessors, (96), 28 states have call successors, (28), 9 states have call predecessors, (28), 9 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-22 17:01:53,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 152 transitions. [2023-11-22 17:01:53,745 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 152 transitions. Word has length 37 [2023-11-22 17:01:53,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:01:53,745 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 152 transitions. [2023-11-22 17:01:53,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-22 17:01:53,746 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 152 transitions. [2023-11-22 17:01:53,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-22 17:01:53,747 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:01:53,747 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:01:53,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-22 17:01:53,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:01:53,960 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-22 17:01:53,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:01:53,961 INFO L85 PathProgramCache]: Analyzing trace with hash -87500117, now seen corresponding path program 1 times [2023-11-22 17:01:53,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:01:53,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148262971] [2023-11-22 17:01:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:01:53,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:01:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:54,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 17:01:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:54,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:01:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:54,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 17:01:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:54,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 17:01:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:54,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-22 17:01:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 17:01:54,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:01:54,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148262971] [2023-11-22 17:01:54,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148262971] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:01:54,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433987166] [2023-11-22 17:01:54,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:01:54,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:01:54,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:01:54,137 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) [2023-11-22 17:01:54,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 17:01:54,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:54,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-22 17:01:54,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:01:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 17:01:54,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:01:54,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-11-22 17:01:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 17:01:54,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433987166] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:01:54,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:01:54,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2023-11-22 17:01:54,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651994401] [2023-11-22 17:01:54,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:01:54,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-22 17:01:54,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:01:54,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-22 17:01:54,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2023-11-22 17:01:54,587 INFO L87 Difference]: Start difference. First operand 117 states and 152 transitions. Second operand has 20 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 9 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-22 17:01:55,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:01:55,007 INFO L93 Difference]: Finished difference Result 149 states and 189 transitions. [2023-11-22 17:01:55,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-22 17:01:55,007 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 9 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) Word has length 37 [2023-11-22 17:01:55,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:01:55,008 INFO L225 Difference]: With dead ends: 149 [2023-11-22 17:01:55,008 INFO L226 Difference]: Without dead ends: 149 [2023-11-22 17:01:55,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2023-11-22 17:01:55,009 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 134 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 17:01:55,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 401 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 17:01:55,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-22 17:01:55,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 125. [2023-11-22 17:01:55,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.25) internal successors, (100), 90 states have internal predecessors, (100), 28 states have call successors, (28), 11 states have call predecessors, (28), 11 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-22 17:01:55,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 156 transitions. [2023-11-22 17:01:55,017 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 156 transitions. Word has length 37 [2023-11-22 17:01:55,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:01:55,017 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 156 transitions. [2023-11-22 17:01:55,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 9 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-22 17:01:55,018 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 156 transitions. [2023-11-22 17:01:55,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-22 17:01:55,018 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:01:55,018 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:01:55,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 17:01:55,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:01:55,230 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-22 17:01:55,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:01:55,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1582465037, now seen corresponding path program 1 times [2023-11-22 17:01:55,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:01:55,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763766492] [2023-11-22 17:01:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:01:55,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:01:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:55,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 17:01:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:55,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:01:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:55,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 17:01:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:55,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 17:01:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:55,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-22 17:01:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 17:01:55,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:01:55,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763766492] [2023-11-22 17:01:55,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763766492] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:01:55,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976055452] [2023-11-22 17:01:55,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:01:55,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:01:55,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:01:55,440 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) [2023-11-22 17:01:55,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 17:01:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:55,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-22 17:01:55,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:01:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 17:01:55,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:01:55,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2023-11-22 17:01:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 17:01:55,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976055452] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:01:55,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:01:55,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 32 [2023-11-22 17:01:55,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529026028] [2023-11-22 17:01:55,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:01:55,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-22 17:01:55,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:01:55,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-22 17:01:55,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2023-11-22 17:01:55,993 INFO L87 Difference]: Start difference. First operand 125 states and 156 transitions. Second operand has 33 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 10 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-11-22 17:01:57,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:01:57,188 INFO L93 Difference]: Finished difference Result 228 states and 291 transitions. [2023-11-22 17:01:57,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-22 17:01:57,188 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 10 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 38 [2023-11-22 17:01:57,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:01:57,189 INFO L225 Difference]: With dead ends: 228 [2023-11-22 17:01:57,189 INFO L226 Difference]: Without dead ends: 228 [2023-11-22 17:01:57,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=593, Invalid=3313, Unknown=0, NotChecked=0, Total=3906 [2023-11-22 17:01:57,191 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 439 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-22 17:01:57,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 491 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-22 17:01:57,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-11-22 17:01:57,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 148. [2023-11-22 17:01:57,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 99 states have (on average 1.2323232323232323) internal successors, (122), 108 states have internal predecessors, (122), 28 states have call successors, (28), 11 states have call predecessors, (28), 15 states have return successors, (38), 28 states have call predecessors, (38), 28 states have call successors, (38) [2023-11-22 17:01:57,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 188 transitions. [2023-11-22 17:01:57,197 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 188 transitions. Word has length 38 [2023-11-22 17:01:57,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:01:57,197 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 188 transitions. [2023-11-22 17:01:57,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 10 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-11-22 17:01:57,198 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 188 transitions. [2023-11-22 17:01:57,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-22 17:01:57,198 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:01:57,198 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:01:57,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-22 17:01:57,410 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,SelfDestructingSolverStorable13 [2023-11-22 17:01:57,411 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-22 17:01:57,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:01:57,411 INFO L85 PathProgramCache]: Analyzing trace with hash -199462405, now seen corresponding path program 1 times [2023-11-22 17:01:57,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:01:57,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70288702] [2023-11-22 17:01:57,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:01:57,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:01:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:57,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 17:01:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:57,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:01:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:57,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 17:01:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:57,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 17:01:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:57,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-22 17:01:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 17:01:57,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:01:57,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70288702] [2023-11-22 17:01:57,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70288702] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:01:57,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227902955] [2023-11-22 17:01:57,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:01:57,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:01:57,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:01:57,696 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) [2023-11-22 17:01:57,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 17:01:57,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:01:57,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-22 17:01:57,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:01:57,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-11-22 17:01:58,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2023-11-22 17:01:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 17:01:58,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:02:00,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227902955] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:00,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 17:02:00,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 21 [2023-11-22 17:02:00,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260378450] [2023-11-22 17:02:00,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 17:02:00,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 17:02:00,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:00,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 17:02:00,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-11-22 17:02:00,170 INFO L87 Difference]: Start difference. First operand 148 states and 188 transitions. Second operand has 21 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 7 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-22 17:02:00,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:00,515 INFO L93 Difference]: Finished difference Result 150 states and 189 transitions. [2023-11-22 17:02:00,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-22 17:02:00,516 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 7 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 42 [2023-11-22 17:02:00,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:00,516 INFO L225 Difference]: With dead ends: 150 [2023-11-22 17:02:00,517 INFO L226 Difference]: Without dead ends: 150 [2023-11-22 17:02:00,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2023-11-22 17:02:00,518 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 84 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:00,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 238 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 17:02:00,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-22 17:02:00,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2023-11-22 17:02:00,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 109 states have internal predecessors, (123), 28 states have call successors, (28), 12 states have call predecessors, (28), 16 states have return successors, (38), 28 states have call predecessors, (38), 28 states have call successors, (38) [2023-11-22 17:02:00,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 189 transitions. [2023-11-22 17:02:00,522 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 189 transitions. Word has length 42 [2023-11-22 17:02:00,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:00,523 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 189 transitions. [2023-11-22 17:02:00,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 7 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-22 17:02:00,523 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 189 transitions. [2023-11-22 17:02:00,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-22 17:02:00,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:00,524 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:00,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-22 17:02:00,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-22 17:02:00,733 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-22 17:02:00,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:00,734 INFO L85 PathProgramCache]: Analyzing trace with hash 2042287604, now seen corresponding path program 1 times [2023-11-22 17:02:00,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:00,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627389102] [2023-11-22 17:02:00,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:00,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:00,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 17:02:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:00,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:02:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:00,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 17:02:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:01,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 17:02:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:01,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:02:01,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:01,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 17:02:01,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:01,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 17:02:01,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-22 17:02:01,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:01,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627389102] [2023-11-22 17:02:01,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627389102] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:01,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526619051] [2023-11-22 17:02:01,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:01,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:01,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:02:01,168 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) [2023-11-22 17:02:01,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-22 17:02:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:01,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-22 17:02:01,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:02:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-22 17:02:01,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:02:01,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-22 17:02:01,778 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:01,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2023-11-22 17:02:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-22 17:02:02,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526619051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:02:02,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:02:02,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-22 17:02:02,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249889718] [2023-11-22 17:02:02,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:02:02,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 17:02:02,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:02,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 17:02:02,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2023-11-22 17:02:02,035 INFO L87 Difference]: Start difference. First operand 150 states and 189 transitions. Second operand has 21 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (16), 1 states have call predecessors, (16), 5 states have return successors, (17), 13 states have call predecessors, (17), 10 states have call successors, (17) [2023-11-22 17:02:02,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:02,578 INFO L93 Difference]: Finished difference Result 202 states and 260 transitions. [2023-11-22 17:02:02,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-22 17:02:02,580 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (16), 1 states have call predecessors, (16), 5 states have return successors, (17), 13 states have call predecessors, (17), 10 states have call successors, (17) Word has length 48 [2023-11-22 17:02:02,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:02,581 INFO L225 Difference]: With dead ends: 202 [2023-11-22 17:02:02,581 INFO L226 Difference]: Without dead ends: 202 [2023-11-22 17:02:02,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2023-11-22 17:02:02,582 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 81 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:02,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 286 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 17:02:02,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-11-22 17:02:02,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2023-11-22 17:02:02,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 101 states have (on average 1.2079207920792079) internal successors, (122), 108 states have internal predecessors, (122), 28 states have call successors, (28), 12 states have call predecessors, (28), 16 states have return successors, (38), 28 states have call predecessors, (38), 28 states have call successors, (38) [2023-11-22 17:02:02,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 188 transitions. [2023-11-22 17:02:02,586 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 188 transitions. Word has length 48 [2023-11-22 17:02:02,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:02,587 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 188 transitions. [2023-11-22 17:02:02,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (16), 1 states have call predecessors, (16), 5 states have return successors, (17), 13 states have call predecessors, (17), 10 states have call successors, (17) [2023-11-22 17:02:02,587 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 188 transitions. [2023-11-22 17:02:02,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-22 17:02:02,587 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:02,587 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:02,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-22 17:02:02,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:02,806 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-22 17:02:02,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:02,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1113591033, now seen corresponding path program 1 times [2023-11-22 17:02:02,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:02,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073825739] [2023-11-22 17:02:02,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:02,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:02,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 17:02:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:02,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:02:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:02,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 17:02:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:03,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 17:02:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:03,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:02:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:03,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 17:02:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:03,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 17:02:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-22 17:02:03,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:03,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073825739] [2023-11-22 17:02:03,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073825739] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:03,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383350370] [2023-11-22 17:02:03,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:03,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:03,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:02:03,153 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) [2023-11-22 17:02:03,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-22 17:02:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:03,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-22 17:02:03,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:02:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-22 17:02:03,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:02:03,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-22 17:02:04,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:02:04,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2023-11-22 17:02:04,278 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-22 17:02:04,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383350370] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:02:04,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:02:04,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2023-11-22 17:02:04,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993132930] [2023-11-22 17:02:04,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:02:04,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-22 17:02:04,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:04,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-22 17:02:04,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2023-11-22 17:02:04,281 INFO L87 Difference]: Start difference. First operand 149 states and 188 transitions. Second operand has 37 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 13 states have call successors, (17), 1 states have call predecessors, (17), 7 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2023-11-22 17:02:06,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:06,997 INFO L93 Difference]: Finished difference Result 303 states and 401 transitions. [2023-11-22 17:02:06,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-22 17:02:06,999 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 13 states have call successors, (17), 1 states have call predecessors, (17), 7 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) Word has length 49 [2023-11-22 17:02:06,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:07,001 INFO L225 Difference]: With dead ends: 303 [2023-11-22 17:02:07,001 INFO L226 Difference]: Without dead ends: 285 [2023-11-22 17:02:07,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=662, Invalid=4740, Unknown=0, NotChecked=0, Total=5402 [2023-11-22 17:02:07,002 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 317 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:07,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 538 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-22 17:02:07,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-11-22 17:02:07,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 192. [2023-11-22 17:02:07,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 136 states have (on average 1.2279411764705883) internal successors, (167), 138 states have internal predecessors, (167), 32 states have call successors, (32), 12 states have call predecessors, (32), 20 states have return successors, (51), 41 states have call predecessors, (51), 32 states have call successors, (51) [2023-11-22 17:02:07,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 250 transitions. [2023-11-22 17:02:07,019 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 250 transitions. Word has length 49 [2023-11-22 17:02:07,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:07,020 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 250 transitions. [2023-11-22 17:02:07,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 13 states have call successors, (17), 1 states have call predecessors, (17), 7 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2023-11-22 17:02:07,020 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 250 transitions. [2023-11-22 17:02:07,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-22 17:02:07,021 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:07,021 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:07,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-22 17:02:07,235 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,SelfDestructingSolverStorable16 [2023-11-22 17:02:07,235 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-22 17:02:07,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:07,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1931239483, now seen corresponding path program 1 times [2023-11-22 17:02:07,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:07,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859355208] [2023-11-22 17:02:07,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:07,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:07,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 17:02:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:07,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:02:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:07,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 17:02:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:07,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 17:02:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:07,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:02:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:07,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 17:02:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:07,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 17:02:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-22 17:02:07,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:07,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859355208] [2023-11-22 17:02:07,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859355208] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:07,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297758683] [2023-11-22 17:02:07,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:07,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:07,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:02:07,507 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) [2023-11-22 17:02:07,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-22 17:02:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:07,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-22 17:02:07,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:02:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-22 17:02:07,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:02:07,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-11-22 17:02:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-22 17:02:08,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297758683] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:02:08,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:02:08,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 30 [2023-11-22 17:02:08,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076018474] [2023-11-22 17:02:08,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:02:08,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-22 17:02:08,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:08,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-22 17:02:08,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2023-11-22 17:02:08,492 INFO L87 Difference]: Start difference. First operand 192 states and 250 transitions. Second operand has 30 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 11 states have call successors, (17), 1 states have call predecessors, (17), 6 states have return successors, (17), 13 states have call predecessors, (17), 11 states have call successors, (17) [2023-11-22 17:02:09,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:09,180 INFO L93 Difference]: Finished difference Result 327 states and 446 transitions. [2023-11-22 17:02:09,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-22 17:02:09,184 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 11 states have call successors, (17), 1 states have call predecessors, (17), 6 states have return successors, (17), 13 states have call predecessors, (17), 11 states have call successors, (17) Word has length 49 [2023-11-22 17:02:09,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:09,188 INFO L225 Difference]: With dead ends: 327 [2023-11-22 17:02:09,188 INFO L226 Difference]: Without dead ends: 316 [2023-11-22 17:02:09,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=243, Invalid=1563, Unknown=0, NotChecked=0, Total=1806 [2023-11-22 17:02:09,190 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 99 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:09,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 425 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 17:02:09,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-11-22 17:02:09,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 221. [2023-11-22 17:02:09,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 155 states have (on average 1.2516129032258065) internal successors, (194), 159 states have internal predecessors, (194), 38 states have call successors, (38), 13 states have call predecessors, (38), 24 states have return successors, (66), 48 states have call predecessors, (66), 38 states have call successors, (66) [2023-11-22 17:02:09,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 298 transitions. [2023-11-22 17:02:09,219 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 298 transitions. Word has length 49 [2023-11-22 17:02:09,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:09,219 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 298 transitions. [2023-11-22 17:02:09,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 11 states have call successors, (17), 1 states have call predecessors, (17), 6 states have return successors, (17), 13 states have call predecessors, (17), 11 states have call successors, (17) [2023-11-22 17:02:09,219 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 298 transitions. [2023-11-22 17:02:09,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-22 17:02:09,220 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:09,220 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:09,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-22 17:02:09,433 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,SelfDestructingSolverStorable17 [2023-11-22 17:02:09,434 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-22 17:02:09,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:09,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1910286081, now seen corresponding path program 1 times [2023-11-22 17:02:09,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:09,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582663486] [2023-11-22 17:02:09,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:09,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:09,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 17:02:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:09,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:02:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:09,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 17:02:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:09,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 17:02:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:09,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-22 17:02:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:09,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-22 17:02:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:09,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-22 17:02:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-22 17:02:09,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:09,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582663486] [2023-11-22 17:02:09,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582663486] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:09,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833888548] [2023-11-22 17:02:09,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:09,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:09,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:02:09,685 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) [2023-11-22 17:02:09,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-22 17:02:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:09,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-22 17:02:09,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:02:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-22 17:02:10,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:02:10,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-11-22 17:02:10,365 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-22 17:02:10,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833888548] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:02:10,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:02:10,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 22 [2023-11-22 17:02:10,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112382608] [2023-11-22 17:02:10,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:02:10,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-22 17:02:10,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:10,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-22 17:02:10,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2023-11-22 17:02:10,369 INFO L87 Difference]: Start difference. First operand 221 states and 298 transitions. Second operand has 22 states, 20 states have (on average 3.45) internal successors, (69), 17 states have internal predecessors, (69), 9 states have call successors, (23), 8 states have call predecessors, (23), 3 states have return successors, (17), 9 states have call predecessors, (17), 7 states have call successors, (17) [2023-11-22 17:02:11,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:11,009 INFO L93 Difference]: Finished difference Result 210 states and 264 transitions. [2023-11-22 17:02:11,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-22 17:02:11,009 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.45) internal successors, (69), 17 states have internal predecessors, (69), 9 states have call successors, (23), 8 states have call predecessors, (23), 3 states have return successors, (17), 9 states have call predecessors, (17), 7 states have call successors, (17) Word has length 54 [2023-11-22 17:02:11,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:11,010 INFO L225 Difference]: With dead ends: 210 [2023-11-22 17:02:11,010 INFO L226 Difference]: Without dead ends: 210 [2023-11-22 17:02:11,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 108 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2023-11-22 17:02:11,011 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 232 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:11,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 404 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 17:02:11,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-11-22 17:02:11,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 193. [2023-11-22 17:02:11,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 137 states have (on average 1.145985401459854) internal successors, (157), 138 states have internal predecessors, (157), 32 states have call successors, (32), 11 states have call predecessors, (32), 21 states have return successors, (55), 43 states have call predecessors, (55), 32 states have call successors, (55) [2023-11-22 17:02:11,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 244 transitions. [2023-11-22 17:02:11,021 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 244 transitions. Word has length 54 [2023-11-22 17:02:11,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:11,022 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 244 transitions. [2023-11-22 17:02:11,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.45) internal successors, (69), 17 states have internal predecessors, (69), 9 states have call successors, (23), 8 states have call predecessors, (23), 3 states have return successors, (17), 9 states have call predecessors, (17), 7 states have call successors, (17) [2023-11-22 17:02:11,022 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 244 transitions. [2023-11-22 17:02:11,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-22 17:02:11,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:11,023 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:11,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-22 17:02:11,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:11,232 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-22 17:02:11,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:11,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1293924338, now seen corresponding path program 1 times [2023-11-22 17:02:11,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:11,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611892307] [2023-11-22 17:02:11,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:11,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:11,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:11,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 17:02:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:11,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:02:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:11,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 17:02:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:11,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 17:02:11,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:11,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-22 17:02:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:11,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 17:02:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:11,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:02:11,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:11,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 17:02:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:11,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 17:02:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-22 17:02:11,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:11,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611892307] [2023-11-22 17:02:11,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611892307] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:11,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946110875] [2023-11-22 17:02:11,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:11,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:11,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:02:11,705 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) [2023-11-22 17:02:11,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-22 17:02:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:11,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-22 17:02:11,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:02:12,067 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-22 17:02:12,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:02:12,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946110875] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:12,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 17:02:12,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 27 [2023-11-22 17:02:12,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090407652] [2023-11-22 17:02:12,362 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 17:02:12,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-22 17:02:12,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:12,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-22 17:02:12,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2023-11-22 17:02:12,364 INFO L87 Difference]: Start difference. First operand 193 states and 244 transitions. Second operand has 28 states, 21 states have (on average 2.380952380952381) internal successors, (50), 23 states have internal predecessors, (50), 12 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2023-11-22 17:02:13,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:13,468 INFO L93 Difference]: Finished difference Result 240 states and 303 transitions. [2023-11-22 17:02:13,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-22 17:02:13,469 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 21 states have (on average 2.380952380952381) internal successors, (50), 23 states have internal predecessors, (50), 12 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) Word has length 66 [2023-11-22 17:02:13,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:13,470 INFO L225 Difference]: With dead ends: 240 [2023-11-22 17:02:13,470 INFO L226 Difference]: Without dead ends: 217 [2023-11-22 17:02:13,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=430, Invalid=2650, Unknown=0, NotChecked=0, Total=3080 [2023-11-22 17:02:13,471 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 195 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:13,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 514 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 17:02:13,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-11-22 17:02:13,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 173. [2023-11-22 17:02:13,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 121 states have (on average 1.1322314049586777) internal successors, (137), 123 states have internal predecessors, (137), 31 states have call successors, (31), 11 states have call predecessors, (31), 18 states have return successors, (48), 38 states have call predecessors, (48), 31 states have call successors, (48) [2023-11-22 17:02:13,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 216 transitions. [2023-11-22 17:02:13,484 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 216 transitions. Word has length 66 [2023-11-22 17:02:13,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:13,485 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 216 transitions. [2023-11-22 17:02:13,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 21 states have (on average 2.380952380952381) internal successors, (50), 23 states have internal predecessors, (50), 12 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2023-11-22 17:02:13,486 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 216 transitions. [2023-11-22 17:02:13,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-22 17:02:13,486 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 17:02:13,486 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:13,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-22 17:02:13,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:13,697 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-22 17:02:13,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:02:13,697 INFO L85 PathProgramCache]: Analyzing trace with hash -2111572788, now seen corresponding path program 1 times [2023-11-22 17:02:13,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:02:13,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245243831] [2023-11-22 17:02:13,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:13,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:02:13,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:13,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 17:02:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:13,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:02:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:13,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 17:02:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:13,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 17:02:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:13,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-22 17:02:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:13,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-22 17:02:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:13,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 17:02:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:13,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 17:02:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:13,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 17:02:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-22 17:02:13,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:02:13,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245243831] [2023-11-22 17:02:13,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245243831] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:13,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031319924] [2023-11-22 17:02:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:02:13,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:02:13,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:02:13,956 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) [2023-11-22 17:02:13,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-22 17:02:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:02:14,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-22 17:02:14,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:02:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-22 17:02:14,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:02:14,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031319924] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:02:14,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 17:02:14,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 24 [2023-11-22 17:02:14,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121388744] [2023-11-22 17:02:14,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 17:02:14,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-22 17:02:14,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:02:14,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-22 17:02:14,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2023-11-22 17:02:14,659 INFO L87 Difference]: Start difference. First operand 173 states and 216 transitions. Second operand has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 11 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 11 states have call predecessors, (16), 9 states have call successors, (16) [2023-11-22 17:02:14,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 17:02:14,936 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2023-11-22 17:02:14,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-22 17:02:14,937 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 11 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 11 states have call predecessors, (16), 9 states have call successors, (16) Word has length 66 [2023-11-22 17:02:14,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 17:02:14,937 INFO L225 Difference]: With dead ends: 44 [2023-11-22 17:02:14,937 INFO L226 Difference]: Without dead ends: 0 [2023-11-22 17:02:14,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2023-11-22 17:02:14,938 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 17:02:14,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 272 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 17:02:14,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-22 17:02:14,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-22 17:02:14,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2023-11-22 17:02:14,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-22 17:02:14,939 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2023-11-22 17:02:14,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 17:02:14,939 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-22 17:02:14,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 11 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 11 states have call predecessors, (16), 9 states have call successors, (16) [2023-11-22 17:02:14,939 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-22 17:02:14,939 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-22 17:02:14,941 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 17 remaining) [2023-11-22 17:02:14,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 17 remaining) [2023-11-22 17:02:14,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 17 remaining) [2023-11-22 17:02:14,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 17 remaining) [2023-11-22 17:02:14,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE (12 of 17 remaining) [2023-11-22 17:02:14,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE (11 of 17 remaining) [2023-11-22 17:02:14,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE (10 of 17 remaining) [2023-11-22 17:02:14,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (9 of 17 remaining) [2023-11-22 17:02:14,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 17 remaining) [2023-11-22 17:02:14,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 17 remaining) [2023-11-22 17:02:14,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 17 remaining) [2023-11-22 17:02:14,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 17 remaining) [2023-11-22 17:02:14,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 17 remaining) [2023-11-22 17:02:14,943 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 17 remaining) [2023-11-22 17:02:14,943 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 17 remaining) [2023-11-22 17:02:14,943 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 17 remaining) [2023-11-22 17:02:14,943 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 17 remaining) [2023-11-22 17:02:14,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-22 17:02:15,143 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,SelfDestructingSolverStorable20 [2023-11-22 17:02:15,146 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:02:15,149 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-22 17:02:15,152 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 05:02:15 BoogieIcfgContainer [2023-11-22 17:02:15,152 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-22 17:02:15,152 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-22 17:02:15,152 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-22 17:02:15,153 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-22 17:02:15,153 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 05:01:40" (3/4) ... [2023-11-22 17:02:15,154 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-22 17:02:15,157 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2023-11-22 17:02:15,158 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2023-11-22 17:02:15,158 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-11-22 17:02:15,164 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 29 nodes and edges [2023-11-22 17:02:15,164 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2023-11-22 17:02:15,164 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-22 17:02:15,164 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-22 17:02:15,276 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-11-22 17:02:15,277 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2023-11-22 17:02:15,277 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-22 17:02:15,277 INFO L158 Benchmark]: Toolchain (without parser) took 35705.52ms. Allocated memory was 184.5MB in the beginning and 308.3MB in the end (delta: 123.7MB). Free memory was 126.6MB in the beginning and 173.5MB in the end (delta: -46.9MB). Peak memory consumption was 79.2MB. Max. memory is 16.1GB. [2023-11-22 17:02:15,277 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 184.5MB. Free memory is still 147.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-22 17:02:15,278 INFO L158 Benchmark]: CACSL2BoogieTranslator took 149.13ms. Allocated memory is still 184.5MB. Free memory was 126.6MB in the beginning and 115.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-22 17:02:15,278 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.38ms. Allocated memory is still 184.5MB. Free memory was 115.7MB in the beginning and 114.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-22 17:02:15,278 INFO L158 Benchmark]: Boogie Preprocessor took 26.29ms. Allocated memory is still 184.5MB. Free memory was 114.0MB in the beginning and 112.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-22 17:02:15,278 INFO L158 Benchmark]: RCFGBuilder took 411.84ms. Allocated memory is still 184.5MB. Free memory was 112.0MB in the beginning and 93.9MB in the end (delta: 18.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-22 17:02:15,278 INFO L158 Benchmark]: TraceAbstraction took 34966.04ms. Allocated memory was 184.5MB in the beginning and 308.3MB in the end (delta: 123.7MB). Free memory was 93.1MB in the beginning and 178.5MB in the end (delta: -85.4MB). Peak memory consumption was 41.4MB. Max. memory is 16.1GB. [2023-11-22 17:02:15,279 INFO L158 Benchmark]: Witness Printer took 124.55ms. Allocated memory is still 308.3MB. Free memory was 178.5MB in the beginning and 173.5MB in the end (delta: 5.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-22 17:02:15,280 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 184.5MB. Free memory is still 147.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 149.13ms. Allocated memory is still 184.5MB. Free memory was 126.6MB in the beginning and 115.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.38ms. Allocated memory is still 184.5MB. Free memory was 115.7MB in the beginning and 114.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.29ms. Allocated memory is still 184.5MB. Free memory was 114.0MB in the beginning and 112.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 411.84ms. Allocated memory is still 184.5MB. Free memory was 112.0MB in the beginning and 93.9MB in the end (delta: 18.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 34966.04ms. Allocated memory was 184.5MB in the beginning and 308.3MB in the end (delta: 123.7MB). Free memory was 93.1MB in the beginning and 178.5MB in the end (delta: -85.4MB). Peak memory consumption was 41.4MB. Max. memory is 16.1GB. * Witness Printer took 124.55ms. Allocated memory is still 308.3MB. Free memory was 178.5MB in the beginning and 173.5MB in the end (delta: 5.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 40]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 5]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 57 locations, 17 error locations. Started 1 CEGAR loops. OverallTime: 34.9s, OverallIterations: 21, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 17.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 2593 SdHoareTripleChecker+Valid, 11.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2553 mSDsluCounter, 5621 SdHoareTripleChecker+Invalid, 10.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4851 mSDsCounter, 956 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8057 IncrementalHoareTripleChecker+Invalid, 9016 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 956 mSolverCounterUnsat, 770 mSDtfsCounter, 8057 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1460 GetRequests, 921 SyntacticMatches, 22 SemanticMatches, 517 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3941 ImplicationChecksByTransitivity, 11.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=221occurred in iteration=18, InterpolantAutomatonStates: 303, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 587 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 13.3s InterpolantComputationTime, 1298 NumberOfCodeBlocks, 1298 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1589 ConstructedInterpolants, 59 QuantifiedInterpolants, 9911 SizeOfPredicates, 129 NumberOfNonLiveVariables, 2251 ConjunctsInSsa, 319 ConjunctsInUnsatCore, 41 InterpolantComputations, 10 PerfectInterpolantSequences, 626/785 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-22 17:02:15,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE