./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/cstrcspn_diffterm_alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/cstrcspn_diffterm_alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx --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 64bit --witnessprinter.graph.data.programhash 6bebda7974b4ee09f480826bc3895f6f62b6e4c0586920bb97da4d140e226dad --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:15:02,602 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:15:02,739 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2023-11-21 22:15:02,753 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:15:02,754 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:15:02,812 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:15:02,813 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:15:02,813 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:15:02,814 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:15:02,814 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:15:02,815 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:15:02,816 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:15:02,817 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:15:02,818 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:15:02,818 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:15:02,819 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:15:02,819 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:15:02,820 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:15:02,821 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:15:02,821 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:15:02,822 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:15:02,825 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:15:02,826 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:15:02,826 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:15:02,827 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:15:02,831 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:15:02,831 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:15:02,832 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:15:02,832 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:15:02,833 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:15:02,834 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:15:02,835 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:15:02,836 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:15:02,837 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:15:02,837 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:15:02,837 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:15:02,838 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6bebda7974b4ee09f480826bc3895f6f62b6e4c0586920bb97da4d140e226dad [2023-11-21 22:15:03,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:15:03,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:15:03,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:15:03,181 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:15:03,182 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:15:03,183 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/termination-15/cstrcspn_diffterm_alloca.i [2023-11-21 22:15:06,401 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:15:06,697 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:15:06,699 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/sv-benchmarks/c/termination-15/cstrcspn_diffterm_alloca.i [2023-11-21 22:15:06,716 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/data/03b7d07d0/ad893d48448d441a9f90ec2f39a29440/FLAG18b14219d [2023-11-21 22:15:06,731 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/data/03b7d07d0/ad893d48448d441a9f90ec2f39a29440 [2023-11-21 22:15:06,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:15:06,737 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:15:06,739 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:15:06,740 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:15:06,745 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:15:06,746 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:15:06" (1/1) ... [2023-11-21 22:15:06,748 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13501c18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:06, skipping insertion in model container [2023-11-21 22:15:06,748 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:15:06" (1/1) ... [2023-11-21 22:15:06,787 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:15:07,157 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:15:07,168 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:15:07,238 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:15:07,291 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:15:07,291 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:07 WrapperNode [2023-11-21 22:15:07,292 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:15:07,293 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:15:07,293 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:15:07,294 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:15:07,302 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:07" (1/1) ... [2023-11-21 22:15:07,323 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:07" (1/1) ... [2023-11-21 22:15:07,348 INFO L138 Inliner]: procedures = 152, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2023-11-21 22:15:07,348 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:15:07,349 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:15:07,349 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:15:07,349 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:15:07,360 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:07" (1/1) ... [2023-11-21 22:15:07,360 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:07" (1/1) ... [2023-11-21 22:15:07,364 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:07" (1/1) ... [2023-11-21 22:15:07,365 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:07" (1/1) ... [2023-11-21 22:15:07,381 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:07" (1/1) ... [2023-11-21 22:15:07,384 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:07" (1/1) ... [2023-11-21 22:15:07,386 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:07" (1/1) ... [2023-11-21 22:15:07,387 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:07" (1/1) ... [2023-11-21 22:15:07,390 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:15:07,391 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:15:07,391 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:15:07,391 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:15:07,392 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:07" (1/1) ... [2023-11-21 22:15:07,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:15:07,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:07,428 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:15:07,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:15:07,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 22:15:07,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 22:15:07,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:15:07,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:15:07,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:15:07,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:15:07,655 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:15:07,657 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:15:07,964 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:15:08,056 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:15:08,056 INFO L308 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-21 22:15:08,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:15:08 BoogieIcfgContainer [2023-11-21 22:15:08,058 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:15:08,063 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:15:08,063 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:15:08,067 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:15:08,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:15:06" (1/3) ... [2023-11-21 22:15:08,071 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c54925e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:15:08, skipping insertion in model container [2023-11-21 22:15:08,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:07" (2/3) ... [2023-11-21 22:15:08,073 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c54925e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:15:08, skipping insertion in model container [2023-11-21 22:15:08,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:15:08" (3/3) ... [2023-11-21 22:15:08,074 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcspn_diffterm_alloca.i [2023-11-21 22:15:08,097 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:15:08,098 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-11-21 22:15:08,149 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:15:08,155 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;@1823c526, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:15:08,155 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2023-11-21 22:15:08,159 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 15 states have (on average 2.4) internal successors, (36), 30 states have internal predecessors, (36), 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) [2023-11-21 22:15:08,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-21 22:15:08,164 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:08,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-21 22:15:08,165 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-21 22:15:08,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:08,169 INFO L85 PathProgramCache]: Analyzing trace with hash 3923, now seen corresponding path program 1 times [2023-11-21 22:15:08,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:08,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879259229] [2023-11-21 22:15:08,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:08,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:08,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:08,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879259229] [2023-11-21 22:15:08,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879259229] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:08,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:08,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:15:08,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575861308] [2023-11-21 22:15:08,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:08,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:15:08,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:08,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:15:08,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:15:08,558 INFO L87 Difference]: Start difference. First operand has 31 states, 15 states have (on average 2.4) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-21 22:15:08,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:08,631 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2023-11-21 22:15:08,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:15:08,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-21 22:15:08,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:08,646 INFO L225 Difference]: With dead ends: 30 [2023-11-21 22:15:08,646 INFO L226 Difference]: Without dead ends: 29 [2023-11-21 22:15:08,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:15:08,655 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:08,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 15 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:15:08,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-21 22:15:08,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-21 22:15:08,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:15:08,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-11-21 22:15:08,691 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 2 [2023-11-21 22:15:08,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:08,692 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-11-21 22:15:08,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-21 22:15:08,694 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-11-21 22:15:08,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-21 22:15:08,694 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:08,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-21 22:15:08,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:15:08,696 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-21 22:15:08,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:08,697 INFO L85 PathProgramCache]: Analyzing trace with hash 3924, now seen corresponding path program 1 times [2023-11-21 22:15:08,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:08,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753637055] [2023-11-21 22:15:08,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:08,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:09,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:09,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753637055] [2023-11-21 22:15:09,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753637055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:09,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:09,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:15:09,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564987749] [2023-11-21 22:15:09,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:09,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:15:09,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:09,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:15:09,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:15:09,156 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-21 22:15:09,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:09,235 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2023-11-21 22:15:09,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:15:09,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-21 22:15:09,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:09,239 INFO L225 Difference]: With dead ends: 28 [2023-11-21 22:15:09,240 INFO L226 Difference]: Without dead ends: 28 [2023-11-21 22:15:09,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:15:09,247 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:09,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 16 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:15:09,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-21 22:15:09,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-21 22:15:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 2.066666666666667) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:15:09,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-11-21 22:15:09,260 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 2 [2023-11-21 22:15:09,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:09,261 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-11-21 22:15:09,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-21 22:15:09,261 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-11-21 22:15:09,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 22:15:09,262 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:09,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 22:15:09,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:15:09,265 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-21 22:15:09,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:09,266 INFO L85 PathProgramCache]: Analyzing trace with hash 121602, now seen corresponding path program 1 times [2023-11-21 22:15:09,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:09,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480119513] [2023-11-21 22:15:09,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:09,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:09,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:09,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480119513] [2023-11-21 22:15:09,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480119513] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:09,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:09,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:15:09,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195329339] [2023-11-21 22:15:09,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:09,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:15:09,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:09,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:15:09,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:15:09,341 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2023-11-21 22:15:09,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:09,374 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2023-11-21 22:15:09,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:15:09,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-21 22:15:09,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:09,375 INFO L225 Difference]: With dead ends: 27 [2023-11-21 22:15:09,375 INFO L226 Difference]: Without dead ends: 27 [2023-11-21 22:15:09,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:15:09,377 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:09,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 14 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:15:09,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-21 22:15:09,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-21 22:15:09,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 2.0) internal successors, (30), 26 states have internal predecessors, (30), 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) [2023-11-21 22:15:09,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-11-21 22:15:09,383 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 3 [2023-11-21 22:15:09,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:09,383 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-11-21 22:15:09,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2023-11-21 22:15:09,384 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-11-21 22:15:09,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 22:15:09,384 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:09,385 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 22:15:09,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:15:09,385 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-21 22:15:09,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:09,386 INFO L85 PathProgramCache]: Analyzing trace with hash 121603, now seen corresponding path program 1 times [2023-11-21 22:15:09,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:09,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286999390] [2023-11-21 22:15:09,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:09,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:09,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:09,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286999390] [2023-11-21 22:15:09,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286999390] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:09,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:09,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:15:09,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246117114] [2023-11-21 22:15:09,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:09,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:15:09,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:09,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:15:09,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:15:09,681 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2023-11-21 22:15:09,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:09,729 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2023-11-21 22:15:09,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:15:09,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-21 22:15:09,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:09,731 INFO L225 Difference]: With dead ends: 26 [2023-11-21 22:15:09,731 INFO L226 Difference]: Without dead ends: 26 [2023-11-21 22:15:09,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:15:09,744 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:09,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 15 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:15:09,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-21 22:15:09,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-21 22:15:09,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 25 states have internal predecessors, (29), 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) [2023-11-21 22:15:09,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-11-21 22:15:09,751 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 3 [2023-11-21 22:15:09,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:09,751 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-11-21 22:15:09,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2023-11-21 22:15:09,752 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-11-21 22:15:09,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-21 22:15:09,752 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:09,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-21 22:15:09,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:15:09,753 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-21 22:15:09,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:09,753 INFO L85 PathProgramCache]: Analyzing trace with hash 3771673, now seen corresponding path program 1 times [2023-11-21 22:15:09,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:09,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750700082] [2023-11-21 22:15:09,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:09,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:09,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:09,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750700082] [2023-11-21 22:15:09,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750700082] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:09,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:09,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:15:09,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303663846] [2023-11-21 22:15:09,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:09,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:15:09,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:09,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:15:09,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:15:09,824 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:15:09,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:09,881 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-11-21 22:15:09,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:15:09,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-21 22:15:09,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:09,885 INFO L225 Difference]: With dead ends: 24 [2023-11-21 22:15:09,885 INFO L226 Difference]: Without dead ends: 24 [2023-11-21 22:15:09,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:15:09,889 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:09,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 12 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:15:09,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-21 22:15:09,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-21 22:15:09,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.8) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:15:09,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-11-21 22:15:09,904 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 4 [2023-11-21 22:15:09,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:09,904 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-11-21 22:15:09,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:15:09,905 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-11-21 22:15:09,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-21 22:15:09,906 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:09,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-21 22:15:09,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:15:09,907 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-21 22:15:09,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:09,908 INFO L85 PathProgramCache]: Analyzing trace with hash 3771674, now seen corresponding path program 1 times [2023-11-21 22:15:09,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:09,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374565227] [2023-11-21 22:15:09,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:09,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:10,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:10,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:10,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374565227] [2023-11-21 22:15:10,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374565227] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:10,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:10,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:15:10,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008037378] [2023-11-21 22:15:10,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:10,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:15:10,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:10,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:15:10,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:15:10,068 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:15:10,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:10,146 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2023-11-21 22:15:10,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:15:10,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-21 22:15:10,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:10,147 INFO L225 Difference]: With dead ends: 41 [2023-11-21 22:15:10,148 INFO L226 Difference]: Without dead ends: 41 [2023-11-21 22:15:10,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:15:10,150 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:10,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:15:10,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-21 22:15:10,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 27. [2023-11-21 22:15:10,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:15:10,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-11-21 22:15:10,160 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 4 [2023-11-21 22:15:10,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:10,161 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-11-21 22:15:10,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:15:10,162 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-11-21 22:15:10,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 22:15:10,162 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:10,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:10,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 22:15:10,168 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-21 22:15:10,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:10,169 INFO L85 PathProgramCache]: Analyzing trace with hash 692765309, now seen corresponding path program 1 times [2023-11-21 22:15:10,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:10,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202635055] [2023-11-21 22:15:10,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:10,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:10,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:10,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202635055] [2023-11-21 22:15:10,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202635055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:10,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:10,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:15:10,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584198086] [2023-11-21 22:15:10,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:10,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:15:10,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:10,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:15:10,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:15:10,270 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2023-11-21 22:15:10,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:10,330 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2023-11-21 22:15:10,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:15:10,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-21 22:15:10,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:10,331 INFO L225 Difference]: With dead ends: 26 [2023-11-21 22:15:10,331 INFO L226 Difference]: Without dead ends: 26 [2023-11-21 22:15:10,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:15:10,334 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:10,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 14 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:15:10,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-21 22:15:10,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-11-21 22:15:10,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 23 states have internal predecessors, (28), 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) [2023-11-21 22:15:10,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-21 22:15:10,342 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2023-11-21 22:15:10,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:10,342 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-21 22:15:10,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2023-11-21 22:15:10,342 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-21 22:15:10,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 22:15:10,343 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:10,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:10,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 22:15:10,344 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-21 22:15:10,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:10,344 INFO L85 PathProgramCache]: Analyzing trace with hash 692765310, now seen corresponding path program 1 times [2023-11-21 22:15:10,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:10,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299039464] [2023-11-21 22:15:10,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:10,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:10,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:10,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:10,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299039464] [2023-11-21 22:15:10,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299039464] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:10,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:10,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:15:10,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104561590] [2023-11-21 22:15:10,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:10,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:15:10,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:10,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:15:10,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:15:10,564 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2023-11-21 22:15:10,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:10,645 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-11-21 22:15:10,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:15:10,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-21 22:15:10,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:10,649 INFO L225 Difference]: With dead ends: 25 [2023-11-21 22:15:10,649 INFO L226 Difference]: Without dead ends: 25 [2023-11-21 22:15:10,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:15:10,651 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:10,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 16 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:15:10,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-21 22:15:10,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-11-21 22:15:10,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:15:10,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-21 22:15:10,660 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 7 [2023-11-21 22:15:10,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:10,660 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-21 22:15:10,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2023-11-21 22:15:10,660 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-21 22:15:10,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 22:15:10,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:10,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:10,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 22:15:10,661 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-21 22:15:10,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:10,662 INFO L85 PathProgramCache]: Analyzing trace with hash 820104, now seen corresponding path program 1 times [2023-11-21 22:15:10,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:10,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964216243] [2023-11-21 22:15:10,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:10,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:10,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:10,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964216243] [2023-11-21 22:15:10,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964216243] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:10,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:10,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:15:10,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145334478] [2023-11-21 22:15:10,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:10,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:15:10,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:10,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:15:10,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:15:10,865 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-11-21 22:15:10,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:10,897 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2023-11-21 22:15:10,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:15:10,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-21 22:15:10,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:10,899 INFO L225 Difference]: With dead ends: 22 [2023-11-21 22:15:10,899 INFO L226 Difference]: Without dead ends: 19 [2023-11-21 22:15:10,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:15:10,902 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:10,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 22 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:15:10,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-21 22:15:10,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-21 22:15:10,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 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) [2023-11-21 22:15:10,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-11-21 22:15:10,914 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 8 [2023-11-21 22:15:10,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:10,914 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-11-21 22:15:10,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-11-21 22:15:10,916 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-11-21 22:15:10,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-21 22:15:10,917 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:10,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:10,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 22:15:10,917 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-21 22:15:10,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:10,918 INFO L85 PathProgramCache]: Analyzing trace with hash 854857532, now seen corresponding path program 1 times [2023-11-21 22:15:10,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:10,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922965566] [2023-11-21 22:15:10,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:10,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:10,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:10,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922965566] [2023-11-21 22:15:10,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922965566] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:10,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:10,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:15:10,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70467032] [2023-11-21 22:15:10,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:10,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:15:10,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:10,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:15:10,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:15:10,973 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-11-21 22:15:10,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:10,996 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2023-11-21 22:15:10,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:15:10,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-21 22:15:10,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:10,999 INFO L225 Difference]: With dead ends: 20 [2023-11-21 22:15:10,999 INFO L226 Difference]: Without dead ends: 20 [2023-11-21 22:15:11,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:15:11,001 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:11,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:15:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-21 22:15:11,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-21 22:15:11,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 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) [2023-11-21 22:15:11,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-11-21 22:15:11,011 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 10 [2023-11-21 22:15:11,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:11,011 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-11-21 22:15:11,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-11-21 22:15:11,012 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-11-21 22:15:11,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-21 22:15:11,012 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:11,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:11,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 22:15:11,013 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-21 22:15:11,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:11,014 INFO L85 PathProgramCache]: Analyzing trace with hash 730629379, now seen corresponding path program 1 times [2023-11-21 22:15:11,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:11,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393634463] [2023-11-21 22:15:11,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:11,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:11,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:11,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:11,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393634463] [2023-11-21 22:15:11,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393634463] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:15:11,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469364587] [2023-11-21 22:15:11,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:11,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:11,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:11,568 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:11,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:15:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:11,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-21 22:15:11,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:11,802 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 14 treesize of output 10 [2023-11-21 22:15:12,105 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:15:12,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 32 treesize of output 29 [2023-11-21 22:15:12,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:12,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:15:12,602 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 13 treesize of output 11 [2023-11-21 22:15:12,612 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 15 treesize of output 11 [2023-11-21 22:15:12,635 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 22 treesize of output 20 [2023-11-21 22:15:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:12,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469364587] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:15:12,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:15:12,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-21 22:15:12,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335064025] [2023-11-21 22:15:12,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:15:12,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-21 22:15:12,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:12,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-21 22:15:12,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-11-21 22:15:12,665 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:15:13,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:13,798 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2023-11-21 22:15:13,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:15:13,799 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-21 22:15:13,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:13,801 INFO L225 Difference]: With dead ends: 44 [2023-11-21 22:15:13,801 INFO L226 Difference]: Without dead ends: 44 [2023-11-21 22:15:13,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2023-11-21 22:15:13,802 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 221 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:13,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 13 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:15:13,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-21 22:15:13,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 24. [2023-11-21 22:15:13,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 23 states have internal predecessors, (28), 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) [2023-11-21 22:15:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-21 22:15:13,808 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 11 [2023-11-21 22:15:13,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:13,809 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-21 22:15:13,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:15:13,810 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-21 22:15:13,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-21 22:15:13,810 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:13,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:13,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:14,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-21 22:15:14,012 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-21 22:15:14,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:14,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1179297172, now seen corresponding path program 1 times [2023-11-21 22:15:14,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:14,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252967506] [2023-11-21 22:15:14,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:14,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:14,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:14,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:14,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252967506] [2023-11-21 22:15:14,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252967506] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:15:14,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372759891] [2023-11-21 22:15:14,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:14,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:14,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:14,477 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:14,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:15:14,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:14,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-21 22:15:14,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:14,582 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 10 treesize of output 8 [2023-11-21 22:15:14,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-21 22:15:14,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2023-11-21 22:15:15,245 INFO L349 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2023-11-21 22:15:15,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 34 [2023-11-21 22:15:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:15,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:15:15,756 WARN L854 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrcspn_~s~0#1.offset| Int) (v_ArrVal_108 (Array Int Int)) (|v_ULTIMATE.start_cstrcspn_~sc1~0#1.offset_24| Int) (|ULTIMATE.start_cstrcspn_~s~0#1.base| Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_108))) (or (< |v_ULTIMATE.start_cstrcspn_~sc1~0#1.offset_24| 0) (< (+ |v_ULTIMATE.start_cstrcspn_~sc1~0#1.offset_24| 1) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrcspn_~sc1~0#1.offset_24|) (not (= 49 (select (select .cse0 |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|))) (= 49 (select (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |v_ULTIMATE.start_cstrcspn_~sc1~0#1.offset_24|))))) is different from false [2023-11-21 22:15:15,798 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:15:15,799 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 33 [2023-11-21 22:15:15,853 INFO L349 Elim1Store]: treesize reduction 4, result has 89.7 percent of original size [2023-11-21 22:15:15,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 76 [2023-11-21 22:15:15,871 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 15 treesize of output 11 [2023-11-21 22:15:15,893 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:15:15,894 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 30 treesize of output 34 [2023-11-21 22:15:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:16,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372759891] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:15:16,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:15:16,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-11-21 22:15:16,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444937873] [2023-11-21 22:15:16,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:15:16,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-21 22:15:16,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:16,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-21 22:15:16,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=593, Unknown=1, NotChecked=50, Total=756 [2023-11-21 22:15:16,063 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 28 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 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) [2023-11-21 22:15:19,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:19,320 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2023-11-21 22:15:19,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-21 22:15:19,321 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-21 22:15:19,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:19,322 INFO L225 Difference]: With dead ends: 86 [2023-11-21 22:15:19,322 INFO L226 Difference]: Without dead ends: 86 [2023-11-21 22:15:19,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=557, Invalid=1797, Unknown=2, NotChecked=94, Total=2450 [2023-11-21 22:15:19,324 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 371 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:19,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 40 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 249 Invalid, 0 Unknown, 67 Unchecked, 0.4s Time] [2023-11-21 22:15:19,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-21 22:15:19,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 51. [2023-11-21 22:15:19,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 50 states have internal predecessors, (65), 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) [2023-11-21 22:15:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2023-11-21 22:15:19,330 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 12 [2023-11-21 22:15:19,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:19,330 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2023-11-21 22:15:19,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 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) [2023-11-21 22:15:19,331 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2023-11-21 22:15:19,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 22:15:19,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:19,332 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:19,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:19,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-21 22:15:19,533 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-21 22:15:19,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:19,533 INFO L85 PathProgramCache]: Analyzing trace with hash -630227704, now seen corresponding path program 2 times [2023-11-21 22:15:19,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:19,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255246813] [2023-11-21 22:15:19,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:19,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:20,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:20,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255246813] [2023-11-21 22:15:20,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255246813] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:15:20,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864537849] [2023-11-21 22:15:20,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:15:20,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:20,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:20,120 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:20,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:15:20,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:15:20,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:15:20,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-21 22:15:20,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:20,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-21 22:15:20,548 INFO L349 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2023-11-21 22:15:20,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 33 [2023-11-21 22:15:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:20,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:15:20,996 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 21 treesize of output 17 [2023-11-21 22:15:21,001 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 25 [2023-11-21 22:15:21,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2023-11-21 22:15:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:21,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864537849] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:15:21,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:15:21,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 25 [2023-11-21 22:15:21,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666703072] [2023-11-21 22:15:21,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:15:21,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-21 22:15:21,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:21,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-21 22:15:21,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2023-11-21 22:15:21,068 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:15:22,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:22,751 INFO L93 Difference]: Finished difference Result 168 states and 200 transitions. [2023-11-21 22:15:22,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-21 22:15:22,752 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-21 22:15:22,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:22,753 INFO L225 Difference]: With dead ends: 168 [2023-11-21 22:15:22,753 INFO L226 Difference]: Without dead ends: 168 [2023-11-21 22:15:22,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=394, Invalid=1498, Unknown=0, NotChecked=0, Total=1892 [2023-11-21 22:15:22,755 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 399 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:22,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 22 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:15:22,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-21 22:15:22,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 75. [2023-11-21 22:15:22,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.3835616438356164) internal successors, (101), 74 states have internal predecessors, (101), 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) [2023-11-21 22:15:22,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2023-11-21 22:15:22,762 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 15 [2023-11-21 22:15:22,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:22,762 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2023-11-21 22:15:22,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:15:22,763 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2023-11-21 22:15:22,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 22:15:22,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:22,764 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:22,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-21 22:15:22,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-21 22:15:22,975 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-21 22:15:22,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:22,976 INFO L85 PathProgramCache]: Analyzing trace with hash 920372501, now seen corresponding path program 1 times [2023-11-21 22:15:22,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:22,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359382459] [2023-11-21 22:15:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:22,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:23,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:23,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359382459] [2023-11-21 22:15:23,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359382459] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:15:23,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203434531] [2023-11-21 22:15:23,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:23,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:23,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:23,166 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:23,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:15:23,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:23,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-21 22:15:23,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:23,262 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 10 treesize of output 8 [2023-11-21 22:15:23,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-21 22:15:23,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2023-11-21 22:15:24,096 INFO L349 Elim1Store]: treesize reduction 23, result has 64.6 percent of original size [2023-11-21 22:15:24,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2023-11-21 22:15:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:24,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:15:24,925 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:15:24,926 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 45 [2023-11-21 22:15:24,992 INFO L349 Elim1Store]: treesize reduction 8, result has 87.5 percent of original size [2023-11-21 22:15:24,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 82 treesize of output 116 [2023-11-21 22:15:25,031 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:15:25,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 51 [2023-11-21 22:15:25,055 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 15 treesize of output 11 [2023-11-21 22:15:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:25,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203434531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:15:25,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:15:25,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 30 [2023-11-21 22:15:25,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539909008] [2023-11-21 22:15:25,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:15:25,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-21 22:15:25,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:25,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-21 22:15:25,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=754, Unknown=4, NotChecked=0, Total=870 [2023-11-21 22:15:25,257 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 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) [2023-11-21 22:15:43,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:43,363 INFO L93 Difference]: Finished difference Result 242 states and 297 transitions. [2023-11-21 22:15:43,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-11-21 22:15:43,364 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-21 22:15:43,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:43,366 INFO L225 Difference]: With dead ends: 242 [2023-11-21 22:15:43,366 INFO L226 Difference]: Without dead ends: 242 [2023-11-21 22:15:43,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5372 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=2595, Invalid=12899, Unknown=6, NotChecked=0, Total=15500 [2023-11-21 22:15:43,373 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 775 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:43,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [775 Valid, 32 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-21 22:15:43,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-11-21 22:15:43,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 157. [2023-11-21 22:15:43,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 155 states have (on average 1.303225806451613) internal successors, (202), 156 states have internal predecessors, (202), 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) [2023-11-21 22:15:43,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 202 transitions. [2023-11-21 22:15:43,383 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 202 transitions. Word has length 21 [2023-11-21 22:15:43,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:43,383 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 202 transitions. [2023-11-21 22:15:43,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 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) [2023-11-21 22:15:43,384 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 202 transitions. [2023-11-21 22:15:43,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-21 22:15:43,385 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:43,385 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:43,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:43,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-21 22:15:43,603 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-21 22:15:43,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:43,604 INFO L85 PathProgramCache]: Analyzing trace with hash -853668462, now seen corresponding path program 3 times [2023-11-21 22:15:43,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:43,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170988059] [2023-11-21 22:15:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:43,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:44,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:44,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170988059] [2023-11-21 22:15:44,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170988059] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:15:44,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440939015] [2023-11-21 22:15:44,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:15:44,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:44,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:44,521 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:44,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49da85b4-a5fb-4e55-a5f3-59f36dc1241a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:15:44,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-21 22:15:44,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:15:44,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-21 22:15:44,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:44,654 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 14 treesize of output 10 [2023-11-21 22:16:01,127 INFO L349 Elim1Store]: treesize reduction 16, result has 83.5 percent of original size [2023-11-21 22:16:01,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 43 treesize of output 100