./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b 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_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 007fc8a389a67fb47c7d326d3f1d284696dfe5de13661e77d6d1bf7cce285194 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:52:37,834 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:52:37,945 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:52:37,954 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:52:37,954 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:52:37,994 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:52:37,997 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:52:37,998 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:52:37,999 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:52:38,004 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:52:38,006 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:52:38,006 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:52:38,007 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:52:38,009 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:52:38,009 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:52:38,009 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:52:38,010 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:52:38,010 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:52:38,011 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:52:38,011 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:52:38,011 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:52:38,012 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:52:38,013 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:52:38,013 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:52:38,013 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:52:38,014 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:52:38,015 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:52:38,015 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:52:38,016 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:52:38,016 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:52:38,018 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:52:38,018 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:52:38,018 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:52:38,019 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:52:38,019 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:52:38,019 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:52:38,020 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:52:38,020 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:52:38,020 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 007fc8a389a67fb47c7d326d3f1d284696dfe5de13661e77d6d1bf7cce285194 [2023-11-06 22:52:38,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:52:38,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:52:38,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:52:38,408 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:52:38,409 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:52:38,410 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i [2023-11-06 22:52:41,582 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:52:41,879 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:52:41,880 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i [2023-11-06 22:52:41,897 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/data/6d60477e1/84a51903370b4c10b096f22ae173c2ec/FLAGd661fc2d8 [2023-11-06 22:52:41,921 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/data/6d60477e1/84a51903370b4c10b096f22ae173c2ec [2023-11-06 22:52:41,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:52:41,930 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:52:41,935 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:52:41,935 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:52:41,941 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:52:41,943 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:52:41" (1/1) ... [2023-11-06 22:52:41,944 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6353510a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:41, skipping insertion in model container [2023-11-06 22:52:41,945 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:52:41" (1/1) ... [2023-11-06 22:52:42,034 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:52:42,360 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:52:42,374 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:52:42,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:52:42,468 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:52:42,469 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:42 WrapperNode [2023-11-06 22:52:42,469 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:52:42,470 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:52:42,470 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:52:42,471 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:52:42,479 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:42" (1/1) ... [2023-11-06 22:52:42,503 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:42" (1/1) ... [2023-11-06 22:52:42,539 INFO L138 Inliner]: procedures = 117, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2023-11-06 22:52:42,540 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:52:42,541 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:52:42,546 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:52:42,546 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:52:42,556 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:42" (1/1) ... [2023-11-06 22:52:42,556 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:42" (1/1) ... [2023-11-06 22:52:42,569 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:42" (1/1) ... [2023-11-06 22:52:42,569 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:42" (1/1) ... [2023-11-06 22:52:42,576 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:42" (1/1) ... [2023-11-06 22:52:42,580 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:42" (1/1) ... [2023-11-06 22:52:42,582 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:42" (1/1) ... [2023-11-06 22:52:42,583 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:42" (1/1) ... [2023-11-06 22:52:42,586 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:52:42,587 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:52:42,587 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:52:42,588 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:52:42,589 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:42" (1/1) ... [2023-11-06 22:52:42,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:52:42,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:42,636 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:52:42,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:52:42,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:52:42,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:52:42,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:52:42,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:52:42,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:52:42,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:52:42,791 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:52:42,793 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:52:42,982 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:52:42,989 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:52:42,989 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:52:42,991 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:52:42 BoogieIcfgContainer [2023-11-06 22:52:42,992 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:52:42,996 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:52:42,996 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:52:43,000 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:52:43,000 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:52:41" (1/3) ... [2023-11-06 22:52:43,002 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d4512ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:52:43, skipping insertion in model container [2023-11-06 22:52:43,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:42" (2/3) ... [2023-11-06 22:52:43,003 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d4512ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:52:43, skipping insertion in model container [2023-11-06 22:52:43,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:52:42" (3/3) ... [2023-11-06 22:52:43,005 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cmemchr-alloca-2.i [2023-11-06 22:52:43,028 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:52:43,029 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-11-06 22:52:43,068 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:52:43,076 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;@4736d16c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:52:43,076 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 22:52:43,082 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.619047619047619) internal successors, (34), 26 states have internal predecessors, (34), 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) [2023-11-06 22:52:43,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 22:52:43,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:43,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:43,090 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:52:43,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:43,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2023-11-06 22:52:43,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:43,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540891781] [2023-11-06 22:52:43,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:43,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:43,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:43,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:43,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540891781] [2023-11-06 22:52:43,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540891781] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:43,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:43,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:52:43,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213413553] [2023-11-06 22:52:43,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:43,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:52:43,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:43,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:52:43,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:52:43,508 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.619047619047619) internal successors, (34), 26 states have internal predecessors, (34), 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 3.5) internal successors, (7), 3 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) [2023-11-06 22:52:43,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:43,573 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2023-11-06 22:52:43,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:52:43,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 [2023-11-06 22:52:43,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:43,588 INFO L225 Difference]: With dead ends: 26 [2023-11-06 22:52:43,588 INFO L226 Difference]: Without dead ends: 24 [2023-11-06 22:52:43,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:52:43,597 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:43,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 30 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:52:43,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-06 22:52:43,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-06 22:52:43,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.45) internal successors, (29), 23 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) [2023-11-06 22:52:43,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-11-06 22:52:43,639 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 7 [2023-11-06 22:52:43,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:43,640 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-11-06 22:52:43,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2023-11-06 22:52:43,641 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-11-06 22:52:43,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 22:52:43,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:43,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:43,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:52:43,644 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:52:43,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:43,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2023-11-06 22:52:43,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:43,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636839061] [2023-11-06 22:52:43,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:43,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:44,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:44,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636839061] [2023-11-06 22:52:44,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636839061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:44,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:44,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:52:44,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767534069] [2023-11-06 22:52:44,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:44,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:52:44,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:44,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:52:44,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:52:44,118 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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) [2023-11-06 22:52:44,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:44,223 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2023-11-06 22:52:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:52:44,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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 [2023-11-06 22:52:44,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:44,225 INFO L225 Difference]: With dead ends: 48 [2023-11-06 22:52:44,225 INFO L226 Difference]: Without dead ends: 48 [2023-11-06 22:52:44,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:52:44,227 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 30 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:44,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 127 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:52:44,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-06 22:52:44,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 27. [2023-11-06 22:52:44,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.391304347826087) internal successors, (32), 26 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) [2023-11-06 22:52:44,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-11-06 22:52:44,235 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 7 [2023-11-06 22:52:44,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:44,235 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-11-06 22:52:44,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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) [2023-11-06 22:52:44,236 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-11-06 22:52:44,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 22:52:44,236 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:44,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:44,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:52:44,237 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:52:44,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:44,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1805088679, now seen corresponding path program 1 times [2023-11-06 22:52:44,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:44,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216697364] [2023-11-06 22:52:44,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:44,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:44,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:44,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216697364] [2023-11-06 22:52:44,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216697364] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:44,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:44,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:52:44,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377436363] [2023-11-06 22:52:44,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:44,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:52:44,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:44,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:52:44,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:52:44,478 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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) [2023-11-06 22:52:44,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:44,531 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-11-06 22:52:44,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:52:44,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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 [2023-11-06 22:52:44,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:44,533 INFO L225 Difference]: With dead ends: 31 [2023-11-06 22:52:44,533 INFO L226 Difference]: Without dead ends: 31 [2023-11-06 22:52:44,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:52:44,535 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:44,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 42 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:52:44,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-06 22:52:44,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2023-11-06 22:52:44,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 25 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) [2023-11-06 22:52:44,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-11-06 22:52:44,540 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 7 [2023-11-06 22:52:44,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:44,541 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-11-06 22:52:44,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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) [2023-11-06 22:52:44,541 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-11-06 22:52:44,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 22:52:44,542 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:44,542 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:44,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:52:44,542 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:52:44,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:44,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1906083540, now seen corresponding path program 1 times [2023-11-06 22:52:44,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:44,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874841036] [2023-11-06 22:52:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:44,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:44,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:44,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874841036] [2023-11-06 22:52:44,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874841036] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:44,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225291228] [2023-11-06 22:52:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:44,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:44,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:44,647 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:44,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:52:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:44,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:52:44,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:44,795 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:52:44,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225291228] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:44,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:52:44,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-06 22:52:44,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690874544] [2023-11-06 22:52:44,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:44,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:52:44,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:44,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:52:44,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:52:44,798 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2023-11-06 22:52:44,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:44,826 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2023-11-06 22:52:44,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:52:44,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 [2023-11-06 22:52:44,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:44,828 INFO L225 Difference]: With dead ends: 46 [2023-11-06 22:52:44,828 INFO L226 Difference]: Without dead ends: 46 [2023-11-06 22:52:44,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:52:44,830 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:44,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 65 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:52:44,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-06 22:52:44,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2023-11-06 22:52:44,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 31 states have internal predecessors, (37), 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) [2023-11-06 22:52:44,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2023-11-06 22:52:44,836 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2023-11-06 22:52:44,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:44,836 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2023-11-06 22:52:44,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2023-11-06 22:52:44,837 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2023-11-06 22:52:44,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 22:52:44,838 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:44,838 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:44,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:45,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:45,044 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:52:45,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:45,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1579537130, now seen corresponding path program 1 times [2023-11-06 22:52:45,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:45,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753324796] [2023-11-06 22:52:45,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:45,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:45,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:45,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753324796] [2023-11-06 22:52:45,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753324796] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:45,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976573282] [2023-11-06 22:52:45,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:45,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:45,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:45,365 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:45,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:52:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:45,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:52:45,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:45,506 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 22:52:45,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:45,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:46,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976573282] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:46,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:46,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-11-06 22:52:46,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892816982] [2023-11-06 22:52:46,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:46,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:52:46,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:46,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:52:46,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:52:46,117 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 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) [2023-11-06 22:52:46,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:46,277 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-11-06 22:52:46,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:52:46,278 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 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 [2023-11-06 22:52:46,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:46,280 INFO L225 Difference]: With dead ends: 33 [2023-11-06 22:52:46,280 INFO L226 Difference]: Without dead ends: 33 [2023-11-06 22:52:46,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:52:46,282 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 65 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:46,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 105 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:52:46,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-06 22:52:46,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2023-11-06 22:52:46,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:46,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2023-11-06 22:52:46,294 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 11 [2023-11-06 22:52:46,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:46,295 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2023-11-06 22:52:46,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 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) [2023-11-06 22:52:46,295 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2023-11-06 22:52:46,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 22:52:46,296 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:46,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:46,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:46,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:46,503 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:52:46,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:46,503 INFO L85 PathProgramCache]: Analyzing trace with hash -373722351, now seen corresponding path program 1 times [2023-11-06 22:52:46,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:46,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987505190] [2023-11-06 22:52:46,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:46,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:46,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:46,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987505190] [2023-11-06 22:52:46,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987505190] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:46,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:46,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:52:46,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047225766] [2023-11-06 22:52:46,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:46,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:52:46,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:46,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:52:46,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:52:46,581 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2023-11-06 22:52:46,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:46,657 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2023-11-06 22:52:46,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:52:46,658 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 14 [2023-11-06 22:52:46,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:46,659 INFO L225 Difference]: With dead ends: 30 [2023-11-06 22:52:46,660 INFO L226 Difference]: Without dead ends: 30 [2023-11-06 22:52:46,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:52:46,664 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:46,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 55 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:52:46,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-06 22:52:46,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2023-11-06 22:52:46,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 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) [2023-11-06 22:52:46,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-11-06 22:52:46,677 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 14 [2023-11-06 22:52:46,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:46,677 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-11-06 22:52:46,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2023-11-06 22:52:46,677 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-11-06 22:52:46,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 22:52:46,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:46,678 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:46,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:52:46,680 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:52:46,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:46,680 INFO L85 PathProgramCache]: Analyzing trace with hash -373722350, now seen corresponding path program 1 times [2023-11-06 22:52:46,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:46,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489188044] [2023-11-06 22:52:46,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:46,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:46,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:46,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489188044] [2023-11-06 22:52:46,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489188044] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:46,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724108785] [2023-11-06 22:52:46,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:46,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:46,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:46,862 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:46,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:52:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:46,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:52:46,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:47,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:47,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:47,108 INFO L351 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 20 treesize of output 16 [2023-11-06 22:52:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:47,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724108785] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:47,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:47,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2023-11-06 22:52:47,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131684950] [2023-11-06 22:52:47,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:47,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:52:47,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:47,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:52:47,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:52:47,125 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 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) [2023-11-06 22:52:47,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:47,309 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2023-11-06 22:52:47,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:52:47,310 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 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 14 [2023-11-06 22:52:47,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:47,313 INFO L225 Difference]: With dead ends: 35 [2023-11-06 22:52:47,314 INFO L226 Difference]: Without dead ends: 35 [2023-11-06 22:52:47,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:52:47,315 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 60 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:47,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 80 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:52:47,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-06 22:52:47,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2023-11-06 22:52:47,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.2413793103448276) 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) [2023-11-06 22:52:47,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-11-06 22:52:47,325 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 14 [2023-11-06 22:52:47,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:47,326 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-11-06 22:52:47,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 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) [2023-11-06 22:52:47,326 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-11-06 22:52:47,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 22:52:47,327 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:47,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:47,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:47,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:52:47,534 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:52:47,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:47,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1300276665, now seen corresponding path program 1 times [2023-11-06 22:52:47,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:47,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302666837] [2023-11-06 22:52:47,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:47,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:47,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:47,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302666837] [2023-11-06 22:52:47,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302666837] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:47,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:47,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:52:47,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503859920] [2023-11-06 22:52:47,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:47,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:52:47,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:47,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:52:47,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:52:47,624 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-11-06 22:52:47,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:47,659 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2023-11-06 22:52:47,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:52:47,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 [2023-11-06 22:52:47,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:47,661 INFO L225 Difference]: With dead ends: 49 [2023-11-06 22:52:47,661 INFO L226 Difference]: Without dead ends: 49 [2023-11-06 22:52:47,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:52:47,662 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:47,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 69 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:52:47,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-06 22:52:47,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2023-11-06 22:52:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 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) [2023-11-06 22:52:47,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2023-11-06 22:52:47,666 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 15 [2023-11-06 22:52:47,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:47,667 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2023-11-06 22:52:47,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-11-06 22:52:47,667 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2023-11-06 22:52:47,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 22:52:47,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:47,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:47,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:52:47,669 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:52:47,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:47,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1558442103, now seen corresponding path program 1 times [2023-11-06 22:52:47,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:47,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920251271] [2023-11-06 22:52:47,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:47,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:47,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:47,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920251271] [2023-11-06 22:52:47,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920251271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:47,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:47,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:52:47,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869785604] [2023-11-06 22:52:47,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:47,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:52:47,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:47,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:52:47,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:52:47,738 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-06 22:52:47,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:47,767 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2023-11-06 22:52:47,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:52:47,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 [2023-11-06 22:52:47,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:47,768 INFO L225 Difference]: With dead ends: 36 [2023-11-06 22:52:47,768 INFO L226 Difference]: Without dead ends: 36 [2023-11-06 22:52:47,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:52:47,769 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:47,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 38 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:52:47,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-06 22:52:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2023-11-06 22:52:47,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:47,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-11-06 22:52:47,773 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 15 [2023-11-06 22:52:47,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:47,773 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-11-06 22:52:47,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-06 22:52:47,774 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-11-06 22:52:47,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-06 22:52:47,775 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:47,775 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:47,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:52:47,775 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:52:47,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:47,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1007310912, now seen corresponding path program 1 times [2023-11-06 22:52:47,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:47,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014216940] [2023-11-06 22:52:47,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:47,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:47,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:47,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014216940] [2023-11-06 22:52:47,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014216940] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:47,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:47,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:52:47,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455407759] [2023-11-06 22:52:47,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:47,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:52:47,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:47,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:52:47,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:52:47,855 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:47,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:47,867 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2023-11-06 22:52:47,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:52:47,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-06 22:52:47,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:47,868 INFO L225 Difference]: With dead ends: 30 [2023-11-06 22:52:47,868 INFO L226 Difference]: Without dead ends: 26 [2023-11-06 22:52:47,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:52:47,869 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:47,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 40 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:52:47,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-06 22:52:47,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-06 22:52:47,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) 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) [2023-11-06 22:52:47,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-11-06 22:52:47,872 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2023-11-06 22:52:47,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:47,873 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-11-06 22:52:47,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:47,873 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-11-06 22:52:47,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 22:52:47,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:47,874 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:47,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:52:47,874 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:52:47,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:47,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1656754904, now seen corresponding path program 1 times [2023-11-06 22:52:47,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:47,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749355812] [2023-11-06 22:52:47,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:47,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:47,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:47,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749355812] [2023-11-06 22:52:47,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749355812] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:47,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:47,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:52:47,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751031600] [2023-11-06 22:52:47,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:47,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:52:47,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:47,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:52:47,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:52:47,960 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:48,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:48,006 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2023-11-06 22:52:48,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:52:48,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-06 22:52:48,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:48,007 INFO L225 Difference]: With dead ends: 33 [2023-11-06 22:52:48,007 INFO L226 Difference]: Without dead ends: 20 [2023-11-06 22:52:48,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:52:48,008 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:48,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 54 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:52:48,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-06 22:52:48,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-06 22:52:48,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) 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) [2023-11-06 22:52:48,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-11-06 22:52:48,011 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 19 [2023-11-06 22:52:48,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:48,012 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-11-06 22:52:48,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:48,012 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-11-06 22:52:48,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 22:52:48,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:48,013 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:48,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:52:48,013 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:52:48,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:48,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1617144038, now seen corresponding path program 1 times [2023-11-06 22:52:48,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:48,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76952032] [2023-11-06 22:52:48,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:48,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:48,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:48,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76952032] [2023-11-06 22:52:48,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76952032] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:48,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834550801] [2023-11-06 22:52:48,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:48,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:48,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:48,152 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:48,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:52:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:48,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:52:48,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:48,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:48,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834550801] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:48,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:48,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-11-06 22:52:48,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306248367] [2023-11-06 22:52:48,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:48,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:52:48,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:48,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:52:48,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:52:48,435 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 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) [2023-11-06 22:52:48,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:48,557 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2023-11-06 22:52:48,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:52:48,557 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 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 19 [2023-11-06 22:52:48,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:48,558 INFO L225 Difference]: With dead ends: 34 [2023-11-06 22:52:48,558 INFO L226 Difference]: Without dead ends: 27 [2023-11-06 22:52:48,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:52:48,559 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:48,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 87 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:52:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-06 22:52:48,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2023-11-06 22:52:48,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:48,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-11-06 22:52:48,562 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2023-11-06 22:52:48,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:48,562 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-11-06 22:52:48,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 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) [2023-11-06 22:52:48,563 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-11-06 22:52:48,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-06 22:52:48,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:48,564 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:48,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:48,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:52:48,770 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:52:48,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:48,771 INFO L85 PathProgramCache]: Analyzing trace with hash -309577815, now seen corresponding path program 2 times [2023-11-06 22:52:48,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:48,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66834898] [2023-11-06 22:52:48,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:48,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:49,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:49,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66834898] [2023-11-06 22:52:49,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66834898] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:49,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268308352] [2023-11-06 22:52:49,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:52:49,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:49,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:49,107 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:49,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:52:49,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:52:49,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:49,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:52:49,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:49,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:49,617 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-06 22:52:49,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:49,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268308352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:49,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:49,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-06 22:52:49,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412554782] [2023-11-06 22:52:49,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:49,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:52:49,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:49,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:52:49,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:52:49,659 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 22 states have internal predecessors, (50), 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) [2023-11-06 22:52:50,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:50,093 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2023-11-06 22:52:50,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:52:50,094 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 22 states have internal predecessors, (50), 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 23 [2023-11-06 22:52:50,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:50,094 INFO L225 Difference]: With dead ends: 31 [2023-11-06 22:52:50,094 INFO L226 Difference]: Without dead ends: 31 [2023-11-06 22:52:50,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:52:50,096 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:50,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 131 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:52:50,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-06 22:52:50,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-11-06 22:52:50,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 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) [2023-11-06 22:52:50,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-11-06 22:52:50,099 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2023-11-06 22:52:50,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:50,099 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-11-06 22:52:50,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 22 states have internal predecessors, (50), 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) [2023-11-06 22:52:50,099 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-11-06 22:52:50,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 22:52:50,100 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:50,100 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:50,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:50,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:52:50,309 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:52:50,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:50,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1540133135, now seen corresponding path program 3 times [2023-11-06 22:52:50,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:50,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228432210] [2023-11-06 22:52:50,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:50,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:50,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:50,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228432210] [2023-11-06 22:52:50,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228432210] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:50,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567439276] [2023-11-06 22:52:50,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:52:50,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:50,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:50,518 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:50,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:52:50,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:52:50,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:50,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:52:50,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:50,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:50,930 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:50,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567439276] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:50,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:50,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-11-06 22:52:50,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756197031] [2023-11-06 22:52:50,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:50,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:52:50,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:50,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:52:50,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:52:50,934 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 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) [2023-11-06 22:52:51,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:51,114 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2023-11-06 22:52:51,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:52:51,115 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 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 28 [2023-11-06 22:52:51,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:51,115 INFO L225 Difference]: With dead ends: 48 [2023-11-06 22:52:51,115 INFO L226 Difference]: Without dead ends: 36 [2023-11-06 22:52:51,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:52:51,116 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:51,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 172 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:52:51,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-06 22:52:51,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2023-11-06 22:52:51,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:51,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2023-11-06 22:52:51,119 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2023-11-06 22:52:51,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:51,119 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2023-11-06 22:52:51,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 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) [2023-11-06 22:52:51,120 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2023-11-06 22:52:51,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 22:52:51,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:51,121 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:51,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:51,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:52:51,329 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:52:51,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:51,329 INFO L85 PathProgramCache]: Analyzing trace with hash 884722574, now seen corresponding path program 4 times [2023-11-06 22:52:51,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:51,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523771541] [2023-11-06 22:52:51,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:51,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:51,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:51,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523771541] [2023-11-06 22:52:51,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523771541] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:51,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594112898] [2023-11-06 22:52:51,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:52:51,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:51,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:51,862 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:51,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:52:51,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:52:51,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:51,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 22:52:51,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:51,966 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:52:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:52,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:52,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594112898] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:52,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:52,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-11-06 22:52:52,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144741432] [2023-11-06 22:52:52,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:52,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 22:52:52,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:52,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 22:52:52,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:52:52,559 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 states have internal predecessors, (78), 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) [2023-11-06 22:52:53,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:53,123 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2023-11-06 22:52:53,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:52:53,124 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 states have internal predecessors, (78), 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 32 [2023-11-06 22:52:53,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:53,124 INFO L225 Difference]: With dead ends: 40 [2023-11-06 22:52:53,124 INFO L226 Difference]: Without dead ends: 40 [2023-11-06 22:52:53,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=217, Invalid=1189, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 22:52:53,126 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 114 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:53,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 146 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:52:53,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-06 22:52:53,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2023-11-06 22:52:53,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 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) [2023-11-06 22:52:53,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2023-11-06 22:52:53,129 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 32 [2023-11-06 22:52:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:53,129 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2023-11-06 22:52:53,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 states have internal predecessors, (78), 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) [2023-11-06 22:52:53,130 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2023-11-06 22:52:53,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 22:52:53,131 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:53,131 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:53,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:53,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:52:53,335 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:52:53,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:53,336 INFO L85 PathProgramCache]: Analyzing trace with hash -510819796, now seen corresponding path program 5 times [2023-11-06 22:52:53,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:53,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247008939] [2023-11-06 22:52:53,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:53,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:53,583 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:53,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:53,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247008939] [2023-11-06 22:52:53,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247008939] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:53,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391781939] [2023-11-06 22:52:53,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:52:53,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:53,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:53,585 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:53,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:52:53,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-06 22:52:53,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:53,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:52:53,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:53,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:54,262 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:54,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391781939] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:54,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:54,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-06 22:52:54,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833192705] [2023-11-06 22:52:54,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:54,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:52:54,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:54,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:52:54,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:52:54,265 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 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) [2023-11-06 22:52:54,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:54,543 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2023-11-06 22:52:54,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:52:54,544 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 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 37 [2023-11-06 22:52:54,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:54,544 INFO L225 Difference]: With dead ends: 62 [2023-11-06 22:52:54,544 INFO L226 Difference]: Without dead ends: 45 [2023-11-06 22:52:54,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:52:54,546 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 44 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:54,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 216 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:52:54,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-06 22:52:54,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2023-11-06 22:52:54,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:54,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2023-11-06 22:52:54,549 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2023-11-06 22:52:54,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:54,549 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2023-11-06 22:52:54,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 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) [2023-11-06 22:52:54,549 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2023-11-06 22:52:54,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-06 22:52:54,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:54,550 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:54,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:54,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:52:54,751 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:52:54,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:54,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1615395281, now seen corresponding path program 6 times [2023-11-06 22:52:54,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:54,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352446951] [2023-11-06 22:52:54,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:54,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:55,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:55,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352446951] [2023-11-06 22:52:55,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352446951] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:55,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239550676] [2023-11-06 22:52:55,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:52:55,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:55,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:55,276 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:55,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:52:55,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-06 22:52:55,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:55,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-06 22:52:55,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:55,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:56,052 INFO L351 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 18 [2023-11-06 22:52:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:56,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239550676] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:56,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:56,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2023-11-06 22:52:56,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028849764] [2023-11-06 22:52:56,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:56,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:52:56,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:56,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:52:56,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:52:56,269 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 32 states, 31 states have (on average 3.225806451612903) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:56,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:56,826 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2023-11-06 22:52:56,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:52:56,835 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.225806451612903) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-06 22:52:56,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:56,836 INFO L225 Difference]: With dead ends: 49 [2023-11-06 22:52:56,836 INFO L226 Difference]: Without dead ends: 49 [2023-11-06 22:52:56,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=275, Invalid=1531, Unknown=0, NotChecked=0, Total=1806 [2023-11-06 22:52:56,837 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 117 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:56,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 173 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:52:56,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-06 22:52:56,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2023-11-06 22:52:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 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) [2023-11-06 22:52:56,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2023-11-06 22:52:56,841 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 41 [2023-11-06 22:52:56,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:56,842 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2023-11-06 22:52:56,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.225806451612903) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:56,842 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2023-11-06 22:52:56,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-06 22:52:56,843 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:56,843 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:56,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:57,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:52:57,052 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:52:57,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:57,053 INFO L85 PathProgramCache]: Analyzing trace with hash 658687019, now seen corresponding path program 7 times [2023-11-06 22:52:57,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:57,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330370703] [2023-11-06 22:52:57,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:57,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:57,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:57,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330370703] [2023-11-06 22:52:57,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330370703] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:57,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231866434] [2023-11-06 22:52:57,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:52:57,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:57,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:57,370 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:57,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:52:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:57,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:52:57,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:57,597 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:57,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:58,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231866434] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:58,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:58,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2023-11-06 22:52:58,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982587371] [2023-11-06 22:52:58,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:58,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:52:58,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:58,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:52:58,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:52:58,014 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 28 states have internal predecessors, (92), 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) [2023-11-06 22:52:58,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:58,469 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2023-11-06 22:52:58,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:52:58,469 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 28 states have internal predecessors, (92), 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 46 [2023-11-06 22:52:58,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:58,469 INFO L225 Difference]: With dead ends: 76 [2023-11-06 22:52:58,470 INFO L226 Difference]: Without dead ends: 54 [2023-11-06 22:52:58,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 22:52:58,471 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 57 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:58,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 469 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:52:58,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-06 22:52:58,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2023-11-06 22:52:58,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 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) [2023-11-06 22:52:58,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2023-11-06 22:52:58,474 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 46 [2023-11-06 22:52:58,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:58,475 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2023-11-06 22:52:58,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 28 states have internal predecessors, (92), 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) [2023-11-06 22:52:58,475 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2023-11-06 22:52:58,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-06 22:52:58,476 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:58,476 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:58,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:58,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:52:58,677 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:52:58,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:58,678 INFO L85 PathProgramCache]: Analyzing trace with hash 40506248, now seen corresponding path program 8 times [2023-11-06 22:52:58,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:58,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616999517] [2023-11-06 22:52:58,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:58,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:59,445 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 18 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:59,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:59,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616999517] [2023-11-06 22:52:59,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616999517] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:59,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294710271] [2023-11-06 22:52:59,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:52:59,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:59,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:59,451 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:59,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:52:59,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:52:59,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:59,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-06 22:52:59,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 32 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:59,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:00,348 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-06 22:53:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 32 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:00,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294710271] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:00,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:53:00,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2023-11-06 22:53:00,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791186347] [2023-11-06 22:53:00,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:00,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 22:53:00,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:00,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 22:53:00,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 22:53:00,465 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 34 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 34 states have internal predecessors, (104), 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) [2023-11-06 22:53:01,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:01,285 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2023-11-06 22:53:01,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:53:01,286 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 34 states have internal predecessors, (104), 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 50 [2023-11-06 22:53:01,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:01,286 INFO L225 Difference]: With dead ends: 58 [2023-11-06 22:53:01,287 INFO L226 Difference]: Without dead ends: 58 [2023-11-06 22:53:01,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=307, Invalid=1855, Unknown=0, NotChecked=0, Total=2162 [2023-11-06 22:53:01,288 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 167 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:01,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 289 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:53:01,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-06 22:53:01,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2023-11-06 22:53:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 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) [2023-11-06 22:53:01,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2023-11-06 22:53:01,294 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 50 [2023-11-06 22:53:01,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:01,295 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2023-11-06 22:53:01,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 34 states have internal predecessors, (104), 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) [2023-11-06 22:53:01,295 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2023-11-06 22:53:01,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-06 22:53:01,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:01,301 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:01,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:01,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:01,507 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:53:01,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:01,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1129260658, now seen corresponding path program 9 times [2023-11-06 22:53:01,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:01,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597306008] [2023-11-06 22:53:01,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:01,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:01,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:01,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597306008] [2023-11-06 22:53:01,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597306008] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:53:01,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706605073] [2023-11-06 22:53:01,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:53:01,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:01,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:01,911 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:01,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:53:02,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 22:53:02,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:53:02,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 22:53:02,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:02,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:03,034 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:03,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706605073] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:03,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:53:03,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2023-11-06 22:53:03,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678649225] [2023-11-06 22:53:03,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:03,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:53:03,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:03,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:53:03,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:53:03,037 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 32 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 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) [2023-11-06 22:53:03,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:03,552 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2023-11-06 22:53:03,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:53:03,552 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 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 55 [2023-11-06 22:53:03,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:03,553 INFO L225 Difference]: With dead ends: 90 [2023-11-06 22:53:03,553 INFO L226 Difference]: Without dead ends: 63 [2023-11-06 22:53:03,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2023-11-06 22:53:03,555 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 69 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:03,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 600 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:53:03,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-06 22:53:03,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2023-11-06 22:53:03,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 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) [2023-11-06 22:53:03,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2023-11-06 22:53:03,561 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 55 [2023-11-06 22:53:03,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:03,561 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2023-11-06 22:53:03,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 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) [2023-11-06 22:53:03,561 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2023-11-06 22:53:03,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-06 22:53:03,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:03,562 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:03,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-06 22:53:03,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-11-06 22:53:03,784 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:53:03,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:03,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1822347189, now seen corresponding path program 10 times [2023-11-06 22:53:03,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:03,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137173682] [2023-11-06 22:53:03,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:03,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:04,655 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 32 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:04,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:04,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137173682] [2023-11-06 22:53:04,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137173682] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:53:04,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365288757] [2023-11-06 22:53:04,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:53:04,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:04,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:04,671 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:04,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:53:04,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:53:04,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:53:04,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-06 22:53:04,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:04,803 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:53:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 50 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:05,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:06,040 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 50 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:06,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365288757] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:06,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:53:06,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 43 [2023-11-06 22:53:06,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126703188] [2023-11-06 22:53:06,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:06,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-06 22:53:06,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:06,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-06 22:53:06,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1663, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 22:53:06,044 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 44 states, 43 states have (on average 3.3488372093023258) internal successors, (144), 44 states have internal predecessors, (144), 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) [2023-11-06 22:53:07,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:07,146 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2023-11-06 22:53:07,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:53:07,146 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.3488372093023258) internal successors, (144), 44 states have internal predecessors, (144), 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 59 [2023-11-06 22:53:07,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:07,147 INFO L225 Difference]: With dead ends: 67 [2023-11-06 22:53:07,147 INFO L226 Difference]: Without dead ends: 67 [2023-11-06 22:53:07,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=448, Invalid=2974, Unknown=0, NotChecked=0, Total=3422 [2023-11-06 22:53:07,150 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 119 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:07,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 449 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:53:07,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-06 22:53:07,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2023-11-06 22:53:07,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 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) [2023-11-06 22:53:07,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2023-11-06 22:53:07,153 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 59 [2023-11-06 22:53:07,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:07,153 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2023-11-06 22:53:07,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.3488372093023258) internal successors, (144), 44 states have internal predecessors, (144), 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) [2023-11-06 22:53:07,154 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2023-11-06 22:53:07,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-06 22:53:07,154 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:07,155 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:07,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:07,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 22:53:07,359 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:53:07,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:07,360 INFO L85 PathProgramCache]: Analyzing trace with hash 897187429, now seen corresponding path program 11 times [2023-11-06 22:53:07,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:07,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756862990] [2023-11-06 22:53:07,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:07,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 12 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:07,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:07,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756862990] [2023-11-06 22:53:07,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756862990] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:53:07,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367969379] [2023-11-06 22:53:07,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:53:07,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:07,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:07,849 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:07,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:53:08,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-06 22:53:08,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:53:08,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-06 22:53:08,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 12 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:08,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 17 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:09,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367969379] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:09,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:53:09,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 38 [2023-11-06 22:53:09,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275157212] [2023-11-06 22:53:09,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:09,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-06 22:53:09,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:09,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-06 22:53:09,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 22:53:09,327 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 38 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 38 states have internal predecessors, (130), 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) [2023-11-06 22:53:10,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:10,150 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2023-11-06 22:53:10,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 22:53:10,151 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 38 states have internal predecessors, (130), 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 64 [2023-11-06 22:53:10,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:10,151 INFO L225 Difference]: With dead ends: 104 [2023-11-06 22:53:10,152 INFO L226 Difference]: Without dead ends: 72 [2023-11-06 22:53:10,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=245, Invalid=2511, Unknown=0, NotChecked=0, Total=2756 [2023-11-06 22:53:10,154 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 75 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:10,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 679 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:53:10,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-06 22:53:10,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2023-11-06 22:53:10,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 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) [2023-11-06 22:53:10,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2023-11-06 22:53:10,157 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 64 [2023-11-06 22:53:10,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:10,158 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2023-11-06 22:53:10,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 38 states have internal predecessors, (130), 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) [2023-11-06 22:53:10,158 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2023-11-06 22:53:10,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-06 22:53:10,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:10,159 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:10,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:10,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:10,375 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:53:10,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:10,376 INFO L85 PathProgramCache]: Analyzing trace with hash 2146504834, now seen corresponding path program 12 times [2023-11-06 22:53:10,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:10,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700016832] [2023-11-06 22:53:10,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:10,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:11,244 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 50 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:11,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:11,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700016832] [2023-11-06 22:53:11,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700016832] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:53:11,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524552190] [2023-11-06 22:53:11,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:53:11,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:11,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:11,247 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:11,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:53:11,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-06 22:53:11,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:53:11,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-06 22:53:11,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:11,806 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:53:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 72 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:12,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 72 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:13,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524552190] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:13,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:53:13,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2023-11-06 22:53:13,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760403577] [2023-11-06 22:53:13,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:13,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-06 22:53:13,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:13,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-06 22:53:13,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=2690, Unknown=0, NotChecked=0, Total=3080 [2023-11-06 22:53:13,369 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 56 states, 55 states have (on average 3.5636363636363635) internal successors, (196), 56 states have internal predecessors, (196), 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) [2023-11-06 22:53:14,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:14,373 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2023-11-06 22:53:14,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:53:14,373 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 3.5636363636363635) internal successors, (196), 56 states have internal predecessors, (196), 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 68 [2023-11-06 22:53:14,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:14,374 INFO L225 Difference]: With dead ends: 76 [2023-11-06 22:53:14,374 INFO L226 Difference]: Without dead ends: 76 [2023-11-06 22:53:14,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=716, Invalid=4540, Unknown=0, NotChecked=0, Total=5256 [2023-11-06 22:53:14,377 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 152 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:14,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 505 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:53:14,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-06 22:53:14,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2023-11-06 22:53:14,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 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) [2023-11-06 22:53:14,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2023-11-06 22:53:14,383 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 68 [2023-11-06 22:53:14,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:14,384 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2023-11-06 22:53:14,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 3.5636363636363635) internal successors, (196), 56 states have internal predecessors, (196), 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) [2023-11-06 22:53:14,386 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2023-11-06 22:53:14,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-06 22:53:14,387 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:14,387 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:14,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-06 22:53:14,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:14,606 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:53:14,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:14,606 INFO L85 PathProgramCache]: Analyzing trace with hash -111069768, now seen corresponding path program 13 times [2023-11-06 22:53:14,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:14,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771489806] [2023-11-06 22:53:14,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:14,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 14 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:15,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:15,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771489806] [2023-11-06 22:53:15,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771489806] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:53:15,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977608790] [2023-11-06 22:53:15,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:53:15,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:15,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:15,121 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:15,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:53:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:15,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:53:15,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 14 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:15,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 14 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:16,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977608790] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:16,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:53:16,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 40 [2023-11-06 22:53:16,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166877573] [2023-11-06 22:53:16,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:16,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-06 22:53:16,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:16,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-06 22:53:16,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1450, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 22:53:16,062 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 40 states, 40 states have (on average 3.65) internal successors, (146), 40 states have internal predecessors, (146), 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) [2023-11-06 22:53:16,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:16,917 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2023-11-06 22:53:16,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:53:16,918 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.65) internal successors, (146), 40 states have internal predecessors, (146), 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 73 [2023-11-06 22:53:16,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:16,919 INFO L225 Difference]: With dead ends: 118 [2023-11-06 22:53:16,919 INFO L226 Difference]: Without dead ends: 81 [2023-11-06 22:53:16,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=212, Invalid=2758, Unknown=0, NotChecked=0, Total=2970 [2023-11-06 22:53:16,920 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 57 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:16,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 1017 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:53:16,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-06 22:53:16,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2023-11-06 22:53:16,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:53:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2023-11-06 22:53:16,923 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 73 [2023-11-06 22:53:16,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:16,923 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2023-11-06 22:53:16,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.65) internal successors, (146), 40 states have internal predecessors, (146), 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) [2023-11-06 22:53:16,924 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2023-11-06 22:53:16,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-06 22:53:16,924 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:16,924 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:16,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-06 22:53:17,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:17,135 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:53:17,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:17,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1527788603, now seen corresponding path program 14 times [2023-11-06 22:53:17,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:17,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123867983] [2023-11-06 22:53:17,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:17,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 72 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:18,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:18,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123867983] [2023-11-06 22:53:18,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123867983] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:53:18,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30573304] [2023-11-06 22:53:18,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:53:18,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:18,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:18,286 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:18,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:53:18,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:53:18,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:53:18,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-06 22:53:18,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 98 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:18,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:19,504 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-06 22:53:19,698 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 98 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:19,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30573304] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:19,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:53:19,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 45 [2023-11-06 22:53:19,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389784089] [2023-11-06 22:53:19,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:19,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-06 22:53:19,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:19,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-06 22:53:19,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1838, Unknown=0, NotChecked=0, Total=2070 [2023-11-06 22:53:19,702 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 states have internal predecessors, (158), 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) [2023-11-06 22:53:21,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:21,089 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2023-11-06 22:53:21,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:53:21,090 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 states have internal predecessors, (158), 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 77 [2023-11-06 22:53:21,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:21,091 INFO L225 Difference]: With dead ends: 85 [2023-11-06 22:53:21,091 INFO L226 Difference]: Without dead ends: 85 [2023-11-06 22:53:21,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 121 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=523, Invalid=3637, Unknown=0, NotChecked=0, Total=4160 [2023-11-06 22:53:21,094 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 157 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:21,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 731 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:53:21,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-06 22:53:21,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2023-11-06 22:53:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 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) [2023-11-06 22:53:21,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2023-11-06 22:53:21,097 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 77 [2023-11-06 22:53:21,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:21,097 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2023-11-06 22:53:21,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 states have internal predecessors, (158), 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) [2023-11-06 22:53:21,098 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2023-11-06 22:53:21,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-06 22:53:21,099 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:21,099 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:21,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:21,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:21,320 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:53:21,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:21,321 INFO L85 PathProgramCache]: Analyzing trace with hash 787512735, now seen corresponding path program 15 times [2023-11-06 22:53:21,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:21,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926278390] [2023-11-06 22:53:21,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:21,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:21,943 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 16 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:21,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:21,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926278390] [2023-11-06 22:53:21,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926278390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:53:21,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130587363] [2023-11-06 22:53:21,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:53:21,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:21,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:21,947 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:21,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:53:22,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-06 22:53:22,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:53:22,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-06 22:53:22,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:23,059 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 16 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:23,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 16 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:23,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130587363] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:23,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:53:23,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 44 [2023-11-06 22:53:23,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374505278] [2023-11-06 22:53:23,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:23,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-06 22:53:23,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:23,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-06 22:53:23,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1772, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 22:53:23,882 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 44 states, 44 states have (on average 3.727272727272727) internal successors, (164), 44 states have internal predecessors, (164), 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) [2023-11-06 22:53:24,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:24,868 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2023-11-06 22:53:24,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 22:53:24,868 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.727272727272727) internal successors, (164), 44 states have internal predecessors, (164), 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 82 [2023-11-06 22:53:24,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:24,869 INFO L225 Difference]: With dead ends: 132 [2023-11-06 22:53:24,869 INFO L226 Difference]: Without dead ends: 90 [2023-11-06 22:53:24,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=235, Invalid=3425, Unknown=0, NotChecked=0, Total=3660 [2023-11-06 22:53:24,871 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 145 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:24,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1254 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:53:24,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-06 22:53:24,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2023-11-06 22:53:24,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 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) [2023-11-06 22:53:24,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2023-11-06 22:53:24,879 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2023-11-06 22:53:24,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:24,880 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2023-11-06 22:53:24,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.727272727272727) internal successors, (164), 44 states have internal predecessors, (164), 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) [2023-11-06 22:53:24,880 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2023-11-06 22:53:24,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-06 22:53:24,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:24,881 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:24,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:25,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 22:53:25,087 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:53:25,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:25,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1328274820, now seen corresponding path program 16 times [2023-11-06 22:53:25,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:25,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430151453] [2023-11-06 22:53:25,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:25,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 98 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:26,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:26,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430151453] [2023-11-06 22:53:26,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430151453] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:53:26,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222761657] [2023-11-06 22:53:26,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:53:26,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:26,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:26,394 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:26,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:53:26,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:53:26,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:53:26,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-06 22:53:26,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:26,596 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:53:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 128 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:27,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 153 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:28,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222761657] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:28,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:53:28,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 56 [2023-11-06 22:53:28,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407821698] [2023-11-06 22:53:28,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:28,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-06 22:53:28,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:28,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-06 22:53:28,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=2748, Unknown=0, NotChecked=0, Total=3192 [2023-11-06 22:53:28,560 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 57 states, 56 states have (on average 3.75) internal successors, (210), 57 states have internal predecessors, (210), 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) [2023-11-06 22:53:30,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:30,136 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2023-11-06 22:53:30,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 22:53:30,136 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.75) internal successors, (210), 57 states have internal predecessors, (210), 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 86 [2023-11-06 22:53:30,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:30,137 INFO L225 Difference]: With dead ends: 94 [2023-11-06 22:53:30,137 INFO L226 Difference]: Without dead ends: 94 [2023-11-06 22:53:30,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1562 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=962, Invalid=5044, Unknown=0, NotChecked=0, Total=6006 [2023-11-06 22:53:30,140 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 270 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:30,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 775 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:53:30,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-06 22:53:30,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2023-11-06 22:53:30,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.032967032967033) internal successors, (94), 91 states have internal predecessors, (94), 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) [2023-11-06 22:53:30,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2023-11-06 22:53:30,146 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 86 [2023-11-06 22:53:30,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:30,146 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2023-11-06 22:53:30,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.75) internal successors, (210), 57 states have internal predecessors, (210), 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) [2023-11-06 22:53:30,146 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2023-11-06 22:53:30,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-06 22:53:30,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:30,147 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:30,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:30,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 22:53:30,351 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:53:30,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:30,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1956884482, now seen corresponding path program 17 times [2023-11-06 22:53:30,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:30,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126719476] [2023-11-06 22:53:30,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:30,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:30,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 18 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:31,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:31,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126719476] [2023-11-06 22:53:31,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126719476] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:53:31,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459615925] [2023-11-06 22:53:31,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:53:31,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:31,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:31,109 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:31,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:53:32,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-11-06 22:53:32,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:53:32,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-06 22:53:32,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 18 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:32,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 23 proven. 328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:34,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459615925] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:34,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:53:34,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 49 [2023-11-06 22:53:34,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517768745] [2023-11-06 22:53:34,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:34,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-06 22:53:34,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:34,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-06 22:53:34,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2197, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 22:53:34,012 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 49 states, 49 states have (on average 3.7346938775510203) internal successors, (183), 49 states have internal predecessors, (183), 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) [2023-11-06 22:53:35,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:35,581 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2023-11-06 22:53:35,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 22:53:35,581 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.7346938775510203) internal successors, (183), 49 states have internal predecessors, (183), 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 91 [2023-11-06 22:53:35,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:35,582 INFO L225 Difference]: With dead ends: 146 [2023-11-06 22:53:35,582 INFO L226 Difference]: Without dead ends: 99 [2023-11-06 22:53:35,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=320, Invalid=4510, Unknown=0, NotChecked=0, Total=4830 [2023-11-06 22:53:35,583 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 111 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:35,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 1232 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:53:35,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-06 22:53:35,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2023-11-06 22:53:35,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 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) [2023-11-06 22:53:35,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2023-11-06 22:53:35,587 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 91 [2023-11-06 22:53:35,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:35,587 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2023-11-06 22:53:35,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.7346938775510203) internal successors, (183), 49 states have internal predecessors, (183), 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) [2023-11-06 22:53:35,587 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2023-11-06 22:53:35,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-06 22:53:35,588 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:35,588 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:35,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:35,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 22:53:35,795 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:53:35,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:35,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1756877761, now seen corresponding path program 18 times [2023-11-06 22:53:35,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:35,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509008487] [2023-11-06 22:53:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:35,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 128 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:37,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:37,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509008487] [2023-11-06 22:53:37,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509008487] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:53:37,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119935889] [2023-11-06 22:53:37,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:53:37,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:37,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:37,159 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:37,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:53:38,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-11-06 22:53:38,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:53:38,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 83 conjunts are in the unsatisfiable core [2023-11-06 22:53:38,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 162 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:39,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:40,003 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-06 22:53:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 162 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:40,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119935889] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:40,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:53:40,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 63 [2023-11-06 22:53:40,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911982308] [2023-11-06 22:53:40,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:40,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-06 22:53:40,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:40,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-06 22:53:40,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=3502, Unknown=0, NotChecked=0, Total=4032 [2023-11-06 22:53:40,279 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 64 states, 63 states have (on average 3.7936507936507935) internal successors, (239), 64 states have internal predecessors, (239), 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) [2023-11-06 22:53:41,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:41,649 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2023-11-06 22:53:41,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-06 22:53:41,649 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 3.7936507936507935) internal successors, (239), 64 states have internal predecessors, (239), 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 95 [2023-11-06 22:53:41,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:41,651 INFO L225 Difference]: With dead ends: 103 [2023-11-06 22:53:41,651 INFO L226 Difference]: Without dead ends: 103 [2023-11-06 22:53:41,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 141 SyntacticMatches, 10 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2558 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1038, Invalid=6444, Unknown=0, NotChecked=0, Total=7482 [2023-11-06 22:53:41,652 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 309 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:41,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 656 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:53:41,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-06 22:53:41,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2023-11-06 22:53:41,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 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) [2023-11-06 22:53:41,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2023-11-06 22:53:41,656 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 95 [2023-11-06 22:53:41,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:41,656 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2023-11-06 22:53:41,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 3.7936507936507935) internal successors, (239), 64 states have internal predecessors, (239), 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) [2023-11-06 22:53:41,657 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2023-11-06 22:53:41,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-06 22:53:41,658 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:41,658 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:41,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:41,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 22:53:41,864 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:53:41,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:41,865 INFO L85 PathProgramCache]: Analyzing trace with hash -924999207, now seen corresponding path program 19 times [2023-11-06 22:53:41,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:41,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021479706] [2023-11-06 22:53:41,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:41,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 20 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:42,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:42,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021479706] [2023-11-06 22:53:42,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021479706] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:53:42,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301412003] [2023-11-06 22:53:42,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:53:42,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:42,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:42,651 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:42,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:53:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:42,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-06 22:53:42,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 20 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:43,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 20 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:44,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301412003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:44,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:53:44,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 52 [2023-11-06 22:53:44,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089574012] [2023-11-06 22:53:44,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:44,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-06 22:53:44,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:44,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-06 22:53:44,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2512, Unknown=0, NotChecked=0, Total=2652 [2023-11-06 22:53:44,242 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 52 states, 52 states have (on average 3.8461538461538463) internal successors, (200), 52 states have internal predecessors, (200), 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) [2023-11-06 22:53:45,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:45,671 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2023-11-06 22:53:45,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 22:53:45,671 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.8461538461538463) internal successors, (200), 52 states have internal predecessors, (200), 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 100 [2023-11-06 22:53:45,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:45,672 INFO L225 Difference]: With dead ends: 160 [2023-11-06 22:53:45,672 INFO L226 Difference]: Without dead ends: 108 [2023-11-06 22:53:45,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=281, Invalid=4975, Unknown=0, NotChecked=0, Total=5256 [2023-11-06 22:53:45,674 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 75 mSDsluCounter, 1667 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1723 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:45,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 1723 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:53:45,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-06 22:53:45,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2023-11-06 22:53:45,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 states have internal predecessors, (107), 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) [2023-11-06 22:53:45,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2023-11-06 22:53:45,678 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2023-11-06 22:53:45,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:45,678 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2023-11-06 22:53:45,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.8461538461538463) internal successors, (200), 52 states have internal predecessors, (200), 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) [2023-11-06 22:53:45,679 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2023-11-06 22:53:45,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-06 22:53:45,680 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:45,680 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:45,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:45,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:45,887 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:53:45,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:45,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1790355830, now seen corresponding path program 20 times [2023-11-06 22:53:45,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:45,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965050348] [2023-11-06 22:53:45,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:45,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 162 proven. 314 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:47,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:47,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965050348] [2023-11-06 22:53:47,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965050348] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:53:47,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290001103] [2023-11-06 22:53:47,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:53:47,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:47,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:47,603 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:47,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:53:47,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:53:47,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:53:47,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 109 conjunts are in the unsatisfiable core [2023-11-06 22:53:47,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:47,786 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:53:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 200 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:48,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 200 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:49,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290001103] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:49,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:53:49,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 68 [2023-11-06 22:53:49,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893078627] [2023-11-06 22:53:49,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:49,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-11-06 22:53:49,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:49,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-11-06 22:53:49,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=4113, Unknown=0, NotChecked=0, Total=4692 [2023-11-06 22:53:49,974 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 69 states, 68 states have (on average 3.735294117647059) internal successors, (254), 69 states have internal predecessors, (254), 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) [2023-11-06 22:53:52,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:52,143 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2023-11-06 22:53:52,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 22:53:52,144 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 3.735294117647059) internal successors, (254), 69 states have internal predecessors, (254), 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 104 [2023-11-06 22:53:52,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:52,145 INFO L225 Difference]: With dead ends: 112 [2023-11-06 22:53:52,145 INFO L226 Difference]: Without dead ends: 112 [2023-11-06 22:53:52,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2398 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1013, Invalid=7729, Unknown=0, NotChecked=0, Total=8742 [2023-11-06 22:53:52,150 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 201 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:52,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 1027 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1388 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:53:52,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-06 22:53:52,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2023-11-06 22:53:52,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0275229357798166) internal successors, (112), 109 states have internal predecessors, (112), 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) [2023-11-06 22:53:52,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2023-11-06 22:53:52,155 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 104 [2023-11-06 22:53:52,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:52,155 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2023-11-06 22:53:52,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 3.735294117647059) internal successors, (254), 69 states have internal predecessors, (254), 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) [2023-11-06 22:53:52,156 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2023-11-06 22:53:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 22:53:52,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:52,157 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:52,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:52,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:52,364 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:53:52,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:52,364 INFO L85 PathProgramCache]: Analyzing trace with hash 45684036, now seen corresponding path program 21 times [2023-11-06 22:53:52,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:52,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750268781] [2023-11-06 22:53:52,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:52,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 22 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:53,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:53,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750268781] [2023-11-06 22:53:53,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750268781] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:53:53,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380356350] [2023-11-06 22:53:53,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:53:53,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:53,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:53,254 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:53,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:53:54,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-11-06 22:53:54,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:53:54,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-06 22:53:54,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 22 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:54,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:55,911 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 22 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:55,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380356350] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:55,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:53:55,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 56 [2023-11-06 22:53:55,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280424694] [2023-11-06 22:53:55,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:55,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-06 22:53:55,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:55,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-06 22:53:55,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2930, Unknown=0, NotChecked=0, Total=3080 [2023-11-06 22:53:55,915 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 56 states, 56 states have (on average 3.892857142857143) internal successors, (218), 56 states have internal predecessors, (218), 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) [2023-11-06 22:53:57,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:57,661 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2023-11-06 22:53:57,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-06 22:53:57,662 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.892857142857143) internal successors, (218), 56 states have internal predecessors, (218), 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 109 [2023-11-06 22:53:57,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:57,663 INFO L225 Difference]: With dead ends: 174 [2023-11-06 22:53:57,663 INFO L226 Difference]: Without dead ends: 117 [2023-11-06 22:53:57,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=304, Invalid=5858, Unknown=0, NotChecked=0, Total=6162 [2023-11-06 22:53:57,664 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 193 mSDsluCounter, 2389 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 2450 SdHoareTripleChecker+Invalid, 2073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:57,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 2450 Invalid, 2073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2061 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 22:53:57,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-06 22:53:57,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2023-11-06 22:53:57,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0265486725663717) internal successors, (116), 113 states have internal predecessors, (116), 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) [2023-11-06 22:53:57,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2023-11-06 22:53:57,668 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 109 [2023-11-06 22:53:57,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:57,668 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2023-11-06 22:53:57,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.892857142857143) internal successors, (218), 56 states have internal predecessors, (218), 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) [2023-11-06 22:53:57,668 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2023-11-06 22:53:57,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-06 22:53:57,670 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:57,670 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:57,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:57,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:57,883 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:53:57,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:57,884 INFO L85 PathProgramCache]: Analyzing trace with hash 941772359, now seen corresponding path program 22 times [2023-11-06 22:53:57,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:57,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562170294] [2023-11-06 22:53:57,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:57,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:57,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 200 proven. 373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:59,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:59,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562170294] [2023-11-06 22:53:59,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562170294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:53:59,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656099407] [2023-11-06 22:53:59,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:53:59,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:59,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:59,784 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:59,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:54:00,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:54:00,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:54:00,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 123 conjunts are in the unsatisfiable core [2023-11-06 22:54:00,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:00,100 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:54:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 242 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:01,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 276 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:02,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656099407] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:02,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:54:02,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 71 [2023-11-06 22:54:02,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521880283] [2023-11-06 22:54:02,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:02,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-11-06 22:54:02,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:02,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-11-06 22:54:02,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=4404, Unknown=0, NotChecked=0, Total=5112 [2023-11-06 22:54:02,886 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand has 72 states, 71 states have (on average 3.887323943661972) internal successors, (276), 72 states have internal predecessors, (276), 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) [2023-11-06 22:54:04,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:54:04,863 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2023-11-06 22:54:04,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-06 22:54:04,864 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 3.887323943661972) internal successors, (276), 72 states have internal predecessors, (276), 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 113 [2023-11-06 22:54:04,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:54:04,865 INFO L225 Difference]: With dead ends: 121 [2023-11-06 22:54:04,865 INFO L226 Difference]: Without dead ends: 121 [2023-11-06 22:54:04,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1499, Invalid=8203, Unknown=0, NotChecked=0, Total=9702 [2023-11-06 22:54:04,867 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 285 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 1465 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:54:04,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1019 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1465 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:54:04,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-06 22:54:04,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2023-11-06 22:54:04,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0254237288135593) internal successors, (121), 118 states have internal predecessors, (121), 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) [2023-11-06 22:54:04,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2023-11-06 22:54:04,872 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 113 [2023-11-06 22:54:04,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:54:04,872 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2023-11-06 22:54:04,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 3.887323943661972) internal successors, (276), 72 states have internal predecessors, (276), 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) [2023-11-06 22:54:04,873 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2023-11-06 22:54:04,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-06 22:54:04,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:54:04,874 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:04,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:05,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:05,081 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:54:05,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:05,081 INFO L85 PathProgramCache]: Analyzing trace with hash 530107155, now seen corresponding path program 23 times [2023-11-06 22:54:05,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:05,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118431972] [2023-11-06 22:54:05,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:05,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 24 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:06,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:06,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118431972] [2023-11-06 22:54:06,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118431972] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:06,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558730469] [2023-11-06 22:54:06,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:54:06,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:06,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:06,025 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:06,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:54:07,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-11-06 22:54:07,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:54:07,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-06 22:54:07,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 24 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:08,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 24 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:09,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558730469] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:09,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:54:09,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 60 [2023-11-06 22:54:09,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776273529] [2023-11-06 22:54:09,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:09,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-06 22:54:09,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:09,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-06 22:54:09,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3380, Unknown=0, NotChecked=0, Total=3540 [2023-11-06 22:54:09,632 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 60 states, 60 states have (on average 3.933333333333333) internal successors, (236), 60 states have internal predecessors, (236), 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) [2023-11-06 22:54:11,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:54:11,554 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2023-11-06 22:54:11,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-06 22:54:11,555 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.933333333333333) internal successors, (236), 60 states have internal predecessors, (236), 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 118 [2023-11-06 22:54:11,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:54:11,556 INFO L225 Difference]: With dead ends: 188 [2023-11-06 22:54:11,556 INFO L226 Difference]: Without dead ends: 126 [2023-11-06 22:54:11,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=327, Invalid=6813, Unknown=0, NotChecked=0, Total=7140 [2023-11-06 22:54:11,557 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 149 mSDsluCounter, 2591 mSDsCounter, 0 mSdLazyCounter, 2234 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 2657 SdHoareTripleChecker+Invalid, 2247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:54:11,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 2657 Invalid, 2247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2234 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 22:54:11,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-06 22:54:11,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2023-11-06 22:54:11,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 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) [2023-11-06 22:54:11,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2023-11-06 22:54:11,569 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 118 [2023-11-06 22:54:11,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:54:11,569 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2023-11-06 22:54:11,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.933333333333333) internal successors, (236), 60 states have internal predecessors, (236), 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) [2023-11-06 22:54:11,570 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2023-11-06 22:54:11,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-06 22:54:11,575 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:54:11,575 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:11,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:11,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-06 22:54:11,783 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:54:11,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:11,783 INFO L85 PathProgramCache]: Analyzing trace with hash 660342128, now seen corresponding path program 24 times [2023-11-06 22:54:11,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:11,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310983049] [2023-11-06 22:54:11,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:11,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 242 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:13,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:13,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310983049] [2023-11-06 22:54:13,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310983049] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:13,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571533782] [2023-11-06 22:54:13,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:54:13,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:13,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:13,528 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:13,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 22:54:14,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2023-11-06 22:54:14,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:54:14,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 104 conjunts are in the unsatisfiable core [2023-11-06 22:54:14,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 288 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:15,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:16,813 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-06 22:54:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 288 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:17,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571533782] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:17,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:54:17,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 78 [2023-11-06 22:54:17,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941085593] [2023-11-06 22:54:17,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:17,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-11-06 22:54:17,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:17,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-11-06 22:54:17,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=833, Invalid=5329, Unknown=0, NotChecked=0, Total=6162 [2023-11-06 22:54:17,203 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand has 79 states, 78 states have (on average 3.948717948717949) internal successors, (308), 79 states have internal predecessors, (308), 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) [2023-11-06 22:54:19,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:54:19,052 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2023-11-06 22:54:19,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-06 22:54:19,053 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 3.948717948717949) internal successors, (308), 79 states have internal predecessors, (308), 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 122 [2023-11-06 22:54:19,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:54:19,054 INFO L225 Difference]: With dead ends: 130 [2023-11-06 22:54:19,054 INFO L226 Difference]: Without dead ends: 130 [2023-11-06 22:54:19,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 183 SyntacticMatches, 13 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4172 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1566, Invalid=9990, Unknown=0, NotChecked=0, Total=11556 [2023-11-06 22:54:19,055 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 400 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:54:19,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 1035 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1306 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:54:19,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-06 22:54:19,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2023-11-06 22:54:19,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 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) [2023-11-06 22:54:19,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2023-11-06 22:54:19,068 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 122 [2023-11-06 22:54:19,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:54:19,069 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2023-11-06 22:54:19,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 3.948717948717949) internal successors, (308), 79 states have internal predecessors, (308), 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) [2023-11-06 22:54:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2023-11-06 22:54:19,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-06 22:54:19,072 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:54:19,072 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:19,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:19,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-06 22:54:19,280 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:54:19,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:19,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1490036106, now seen corresponding path program 25 times [2023-11-06 22:54:19,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:19,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732120126] [2023-11-06 22:54:19,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:19,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:20,308 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 26 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:20,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:20,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732120126] [2023-11-06 22:54:20,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732120126] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:20,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260928961] [2023-11-06 22:54:20,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:54:20,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:20,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:20,311 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:20,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 22:54:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:20,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-06 22:54:20,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 26 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:20,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 26 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:22,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260928961] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:22,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:54:22,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 64 [2023-11-06 22:54:22,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110275111] [2023-11-06 22:54:22,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:22,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-06 22:54:22,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:22,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-06 22:54:22,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3862, Unknown=0, NotChecked=0, Total=4032 [2023-11-06 22:54:22,477 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 64 states, 64 states have (on average 3.96875) internal successors, (254), 64 states have internal predecessors, (254), 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) [2023-11-06 22:54:24,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:54:24,632 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2023-11-06 22:54:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-06 22:54:24,632 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.96875) internal successors, (254), 64 states have internal predecessors, (254), 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 127 [2023-11-06 22:54:24,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:54:24,633 INFO L225 Difference]: With dead ends: 202 [2023-11-06 22:54:24,634 INFO L226 Difference]: Without dead ends: 135 [2023-11-06 22:54:24,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=350, Invalid=7840, Unknown=0, NotChecked=0, Total=8190 [2023-11-06 22:54:24,635 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 162 mSDsluCounter, 2757 mSDsCounter, 0 mSdLazyCounter, 2385 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 2828 SdHoareTripleChecker+Invalid, 2398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:54:24,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 2828 Invalid, 2398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2385 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 22:54:24,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-06 22:54:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2023-11-06 22:54:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 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) [2023-11-06 22:54:24,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2023-11-06 22:54:24,639 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 127 [2023-11-06 22:54:24,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:54:24,639 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2023-11-06 22:54:24,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.96875) internal successors, (254), 64 states have internal predecessors, (254), 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) [2023-11-06 22:54:24,640 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2023-11-06 22:54:24,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-06 22:54:24,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:54:24,641 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:24,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:24,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-06 22:54:24,848 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:54:24,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:24,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1094958131, now seen corresponding path program 26 times [2023-11-06 22:54:24,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:24,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140141866] [2023-11-06 22:54:24,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:24,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 288 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:26,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:26,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140141866] [2023-11-06 22:54:26,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140141866] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:26,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189869509] [2023-11-06 22:54:26,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:54:26,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:26,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:26,931 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:26,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 22:54:27,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:54:27,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:54:27,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 135 conjunts are in the unsatisfiable core [2023-11-06 22:54:27,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 338 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:28,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:29,079 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-06 22:54:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 338 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:29,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189869509] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:29,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:54:29,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 69 [2023-11-06 22:54:29,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896164246] [2023-11-06 22:54:29,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:29,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-11-06 22:54:29,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:29,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-11-06 22:54:29,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=4286, Unknown=0, NotChecked=0, Total=4830 [2023-11-06 22:54:29,547 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 70 states, 69 states have (on average 3.8550724637681157) internal successors, (266), 70 states have internal predecessors, (266), 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) [2023-11-06 22:54:32,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:54:32,326 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2023-11-06 22:54:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-06 22:54:32,327 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 3.8550724637681157) internal successors, (266), 70 states have internal predecessors, (266), 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 131 [2023-11-06 22:54:32,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:54:32,328 INFO L225 Difference]: With dead ends: 139 [2023-11-06 22:54:32,328 INFO L226 Difference]: Without dead ends: 139 [2023-11-06 22:54:32,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 211 SyntacticMatches, 14 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3587 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1117, Invalid=8983, Unknown=0, NotChecked=0, Total=10100 [2023-11-06 22:54:32,330 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 252 mSDsluCounter, 1555 mSDsCounter, 0 mSdLazyCounter, 2368 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 2369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:54:32,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 1615 Invalid, 2369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2368 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 22:54:32,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-11-06 22:54:32,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2023-11-06 22:54:32,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0220588235294117) internal successors, (139), 136 states have internal predecessors, (139), 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) [2023-11-06 22:54:32,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2023-11-06 22:54:32,334 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 131 [2023-11-06 22:54:32,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:54:32,335 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2023-11-06 22:54:32,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 3.8550724637681157) internal successors, (266), 70 states have internal predecessors, (266), 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) [2023-11-06 22:54:32,335 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2023-11-06 22:54:32,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-06 22:54:32,336 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:54:32,336 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:32,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-06 22:54:32,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-06 22:54:32,543 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:54:32,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:32,543 INFO L85 PathProgramCache]: Analyzing trace with hash -929474227, now seen corresponding path program 27 times [2023-11-06 22:54:32,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:32,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134864415] [2023-11-06 22:54:32,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:32,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 28 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:33,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:33,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134864415] [2023-11-06 22:54:33,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134864415] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:33,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8525773] [2023-11-06 22:54:33,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:54:33,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:33,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:33,867 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:33,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 22:54:35,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-11-06 22:54:35,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:54:35,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-06 22:54:35,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:35,695 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 28 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:35,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:37,496 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 28 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:37,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8525773] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:37,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:54:37,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 68 [2023-11-06 22:54:37,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790812138] [2023-11-06 22:54:37,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:37,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-11-06 22:54:37,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:37,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-11-06 22:54:37,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=4376, Unknown=0, NotChecked=0, Total=4556 [2023-11-06 22:54:37,501 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 68 states, 68 states have (on average 4.0) internal successors, (272), 68 states have internal predecessors, (272), 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) [2023-11-06 22:54:40,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:54:40,131 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2023-11-06 22:54:40,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 22:54:40,131 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 4.0) internal successors, (272), 68 states have internal predecessors, (272), 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 136 [2023-11-06 22:54:40,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:54:40,132 INFO L225 Difference]: With dead ends: 216 [2023-11-06 22:54:40,132 INFO L226 Difference]: Without dead ends: 144 [2023-11-06 22:54:40,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=373, Invalid=8939, Unknown=0, NotChecked=0, Total=9312 [2023-11-06 22:54:40,133 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 176 mSDsluCounter, 3640 mSDsCounter, 0 mSdLazyCounter, 3121 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 3716 SdHoareTripleChecker+Invalid, 3136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:54:40,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 3716 Invalid, 3136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3121 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 22:54:40,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-06 22:54:40,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2023-11-06 22:54:40,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 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) [2023-11-06 22:54:40,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2023-11-06 22:54:40,138 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 136 [2023-11-06 22:54:40,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:54:40,138 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2023-11-06 22:54:40,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 4.0) internal successors, (272), 68 states have internal predecessors, (272), 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) [2023-11-06 22:54:40,138 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2023-11-06 22:54:40,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-06 22:54:40,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:54:40,140 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:40,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:40,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-06 22:54:40,347 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:54:40,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:40,348 INFO L85 PathProgramCache]: Analyzing trace with hash -693660054, now seen corresponding path program 28 times [2023-11-06 22:54:40,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:40,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065754952] [2023-11-06 22:54:40,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:40,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:42,534 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 338 proven. 580 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:42,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:42,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065754952] [2023-11-06 22:54:42,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065754952] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:42,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229868057] [2023-11-06 22:54:42,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:54:42,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:42,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:42,536 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:42,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-06 22:54:43,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:54:43,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:54:43,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 150 conjunts are in the unsatisfiable core [2023-11-06 22:54:43,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:43,093 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:54:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 392 proven. 526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:44,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 435 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:46,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229868057] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:46,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:54:46,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 86 [2023-11-06 22:54:46,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758893805] [2023-11-06 22:54:46,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:46,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2023-11-06 22:54:46,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:46,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2023-11-06 22:54:46,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=6447, Unknown=0, NotChecked=0, Total=7482 [2023-11-06 22:54:46,711 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand has 87 states, 86 states have (on average 3.9767441860465116) internal successors, (342), 87 states have internal predecessors, (342), 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) [2023-11-06 22:54:49,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:54:49,484 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2023-11-06 22:54:49,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-06 22:54:49,485 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 3.9767441860465116) internal successors, (342), 87 states have internal predecessors, (342), 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 140 [2023-11-06 22:54:49,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:54:49,486 INFO L225 Difference]: With dead ends: 148 [2023-11-06 22:54:49,486 INFO L226 Difference]: Without dead ends: 148 [2023-11-06 22:54:49,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4142 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2153, Invalid=12127, Unknown=0, NotChecked=0, Total=14280 [2023-11-06 22:54:49,487 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 434 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 1852 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:54:49,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 1272 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1852 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 22:54:49,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-06 22:54:49,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2023-11-06 22:54:49,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 145 states have internal predecessors, (148), 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) [2023-11-06 22:54:49,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2023-11-06 22:54:49,490 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 140 [2023-11-06 22:54:49,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:54:49,491 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2023-11-06 22:54:49,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 3.9767441860465116) internal successors, (342), 87 states have internal predecessors, (342), 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) [2023-11-06 22:54:49,491 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2023-11-06 22:54:49,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-06 22:54:49,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:54:49,492 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:49,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:49,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-06 22:54:49,692 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:54:49,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:49,693 INFO L85 PathProgramCache]: Analyzing trace with hash -455466800, now seen corresponding path program 29 times [2023-11-06 22:54:49,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:49,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512484347] [2023-11-06 22:54:49,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:49,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 30 proven. 960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:50,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:50,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512484347] [2023-11-06 22:54:50,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512484347] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:50,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446398909] [2023-11-06 22:54:50,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:54:50,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:50,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:50,956 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:50,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-06 22:54:55,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-11-06 22:54:55,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:54:55,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-06 22:54:55,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 30 proven. 960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:55,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 30 proven. 960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:57,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446398909] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:57,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:54:57,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 72 [2023-11-06 22:54:57,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312776967] [2023-11-06 22:54:57,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:57,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-11-06 22:54:57,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:57,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-11-06 22:54:57,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=4922, Unknown=0, NotChecked=0, Total=5112 [2023-11-06 22:54:57,887 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand has 72 states, 72 states have (on average 4.027777777777778) internal successors, (290), 72 states have internal predecessors, (290), 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) [2023-11-06 22:55:00,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:55:00,813 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2023-11-06 22:55:00,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-06 22:55:00,814 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 4.027777777777778) internal successors, (290), 72 states have internal predecessors, (290), 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 145 [2023-11-06 22:55:00,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:55:00,815 INFO L225 Difference]: With dead ends: 230 [2023-11-06 22:55:00,815 INFO L226 Difference]: Without dead ends: 153 [2023-11-06 22:55:00,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=396, Invalid=10110, Unknown=0, NotChecked=0, Total=10506 [2023-11-06 22:55:00,816 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 110 mSDsluCounter, 4088 mSDsCounter, 0 mSdLazyCounter, 3545 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 4169 SdHoareTripleChecker+Invalid, 3560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:55:00,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 4169 Invalid, 3560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3545 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-06 22:55:00,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-11-06 22:55:00,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2023-11-06 22:55:00,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0201342281879195) internal successors, (152), 149 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:00,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2023-11-06 22:55:00,820 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 145 [2023-11-06 22:55:00,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:55:00,820 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2023-11-06 22:55:00,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 4.027777777777778) internal successors, (290), 72 states have internal predecessors, (290), 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) [2023-11-06 22:55:00,821 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2023-11-06 22:55:00,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-06 22:55:00,822 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:55:00,822 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:00,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:01,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-06 22:55:01,031 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:55:01,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:01,031 INFO L85 PathProgramCache]: Analyzing trace with hash -221096877, now seen corresponding path program 30 times [2023-11-06 22:55:01,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:01,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9413118] [2023-11-06 22:55:01,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:01,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:02,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 392 proven. 659 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:02,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:02,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9413118] [2023-11-06 22:55:02,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9413118] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:02,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159065519] [2023-11-06 22:55:02,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:55:02,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:02,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:02,945 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:02,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-06 22:55:05,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-11-06 22:55:05,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:05,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 126 conjunts are in the unsatisfiable core [2023-11-06 22:55:05,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:05,792 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:55:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 450 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:07,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 450 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:09,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159065519] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:09,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:09,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 109 [2023-11-06 22:55:09,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281516427] [2023-11-06 22:55:09,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:09,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2023-11-06 22:55:09,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:09,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2023-11-06 22:55:09,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1632, Invalid=10358, Unknown=0, NotChecked=0, Total=11990 [2023-11-06 22:55:09,966 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand has 110 states, 109 states have (on average 4.027522935779817) internal successors, (439), 110 states have internal predecessors, (439), 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) [2023-11-06 22:55:12,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:55:12,865 INFO L93 Difference]: Finished difference Result 157 states and 159 transitions. [2023-11-06 22:55:12,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-06 22:55:12,865 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 109 states have (on average 4.027522935779817) internal successors, (439), 110 states have internal predecessors, (439), 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 149 [2023-11-06 22:55:12,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:55:12,866 INFO L225 Difference]: With dead ends: 157 [2023-11-06 22:55:12,867 INFO L226 Difference]: Without dead ends: 157 [2023-11-06 22:55:12,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6637 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2642, Invalid=18238, Unknown=0, NotChecked=0, Total=20880 [2023-11-06 22:55:12,869 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 223 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 1817 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 1818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:55:12,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 1241 Invalid, 1818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1817 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:55:12,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-06 22:55:12,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2023-11-06 22:55:12,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0194805194805194) internal successors, (157), 154 states have internal predecessors, (157), 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) [2023-11-06 22:55:12,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2023-11-06 22:55:12,873 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 149 [2023-11-06 22:55:12,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:55:12,873 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2023-11-06 22:55:12,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 109 states have (on average 4.027522935779817) internal successors, (439), 110 states have internal predecessors, (439), 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) [2023-11-06 22:55:12,874 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2023-11-06 22:55:12,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-11-06 22:55:12,875 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:55:12,875 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:12,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:13,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:13,079 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:55:13,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:13,079 INFO L85 PathProgramCache]: Analyzing trace with hash -461984633, now seen corresponding path program 31 times [2023-11-06 22:55:13,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:13,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068357079] [2023-11-06 22:55:13,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:13,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 32 proven. 1096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:14,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:14,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068357079] [2023-11-06 22:55:14,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068357079] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:14,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378516583] [2023-11-06 22:55:14,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:55:14,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:14,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:14,409 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:14,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-06 22:55:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:15,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-06 22:55:15,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 32 proven. 1096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:15,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 32 proven. 1096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:17,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378516583] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:17,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:17,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 76 [2023-11-06 22:55:17,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170247732] [2023-11-06 22:55:17,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:17,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-11-06 22:55:17,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:17,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-11-06 22:55:17,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=5500, Unknown=0, NotChecked=0, Total=5700 [2023-11-06 22:55:17,547 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand has 76 states, 76 states have (on average 4.052631578947368) internal successors, (308), 76 states have internal predecessors, (308), 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) [2023-11-06 22:55:20,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:55:20,963 INFO L93 Difference]: Finished difference Result 244 states and 246 transitions. [2023-11-06 22:55:20,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-06 22:55:20,963 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 4.052631578947368) internal successors, (308), 76 states have internal predecessors, (308), 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 154 [2023-11-06 22:55:20,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:55:20,964 INFO L225 Difference]: With dead ends: 244 [2023-11-06 22:55:20,964 INFO L226 Difference]: Without dead ends: 162 [2023-11-06 22:55:20,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=419, Invalid=11353, Unknown=0, NotChecked=0, Total=11772 [2023-11-06 22:55:20,966 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 201 mSDsluCounter, 4472 mSDsCounter, 0 mSdLazyCounter, 3764 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 4558 SdHoareTripleChecker+Invalid, 3780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 3764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:55:20,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 4558 Invalid, 3780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 3764 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-06 22:55:20,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-06 22:55:20,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2023-11-06 22:55:20,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.018987341772152) internal successors, (161), 158 states have internal predecessors, (161), 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) [2023-11-06 22:55:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2023-11-06 22:55:20,971 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 154 [2023-11-06 22:55:20,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:55:20,972 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2023-11-06 22:55:20,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 4.052631578947368) internal successors, (308), 76 states have internal predecessors, (308), 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) [2023-11-06 22:55:20,972 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2023-11-06 22:55:20,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-06 22:55:20,973 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:55:20,973 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:20,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:21,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-06 22:55:21,181 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:55:21,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:21,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1331905436, now seen corresponding path program 32 times [2023-11-06 22:55:21,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:21,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981103602] [2023-11-06 22:55:21,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:21,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 450 proven. 743 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:23,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:23,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981103602] [2023-11-06 22:55:23,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981103602] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:23,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305148342] [2023-11-06 22:55:23,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:55:23,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:23,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:23,755 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:23,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-06 22:55:23,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:55:23,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:23,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 162 conjunts are in the unsatisfiable core [2023-11-06 22:55:24,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:25,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 512 proven. 681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:25,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:26,695 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-06 22:55:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 512 proven. 681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:27,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305148342] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:27,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:27,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 81 [2023-11-06 22:55:27,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392291676] [2023-11-06 22:55:27,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:27,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2023-11-06 22:55:27,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:27,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2023-11-06 22:55:27,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=5888, Unknown=0, NotChecked=0, Total=6642 [2023-11-06 22:55:27,346 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand has 82 states, 81 states have (on average 3.950617283950617) internal successors, (320), 82 states have internal predecessors, (320), 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) [2023-11-06 22:55:31,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:55:31,075 INFO L93 Difference]: Finished difference Result 166 states and 168 transitions. [2023-11-06 22:55:31,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-06 22:55:31,075 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.950617283950617) internal successors, (320), 82 states have internal predecessors, (320), 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 158 [2023-11-06 22:55:31,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:55:31,077 INFO L225 Difference]: With dead ends: 166 [2023-11-06 22:55:31,077 INFO L226 Difference]: Without dead ends: 166 [2023-11-06 22:55:31,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 256 SyntacticMatches, 17 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5174 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1495, Invalid=12547, Unknown=0, NotChecked=0, Total=14042 [2023-11-06 22:55:31,079 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 300 mSDsluCounter, 1899 mSDsCounter, 0 mSdLazyCounter, 2857 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 1971 SdHoareTripleChecker+Invalid, 2858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:55:31,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 1971 Invalid, 2858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2857 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 22:55:31,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-11-06 22:55:31,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2023-11-06 22:55:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.01840490797546) internal successors, (166), 163 states have internal predecessors, (166), 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) [2023-11-06 22:55:31,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2023-11-06 22:55:31,085 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 158 [2023-11-06 22:55:31,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:55:31,086 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2023-11-06 22:55:31,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.950617283950617) internal successors, (320), 82 states have internal predecessors, (320), 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) [2023-11-06 22:55:31,086 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2023-11-06 22:55:31,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-06 22:55:31,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:55:31,088 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:31,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-06 22:55:31,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-11-06 22:55:31,300 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:55:31,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:31,300 INFO L85 PathProgramCache]: Analyzing trace with hash -907041002, now seen corresponding path program 33 times [2023-11-06 22:55:31,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:31,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447217033] [2023-11-06 22:55:31,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:31,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 34 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:32,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:32,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447217033] [2023-11-06 22:55:32,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447217033] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:32,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646545435] [2023-11-06 22:55:32,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:55:32,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:32,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:32,899 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:32,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-06 22:55:37,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-11-06 22:55:37,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:37,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-06 22:55:37,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:37,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 34 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:37,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 34 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:40,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646545435] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:40,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:40,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 80 [2023-11-06 22:55:40,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629797194] [2023-11-06 22:55:40,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:40,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-11-06 22:55:40,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:40,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-11-06 22:55:40,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=6110, Unknown=0, NotChecked=0, Total=6320 [2023-11-06 22:55:40,641 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand has 80 states, 80 states have (on average 4.075) internal successors, (326), 80 states have internal predecessors, (326), 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) [2023-11-06 22:55:44,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:55:44,474 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2023-11-06 22:55:44,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-06 22:55:44,475 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 4.075) internal successors, (326), 80 states have internal predecessors, (326), 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 163 [2023-11-06 22:55:44,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:55:44,476 INFO L225 Difference]: With dead ends: 258 [2023-11-06 22:55:44,476 INFO L226 Difference]: Without dead ends: 171 [2023-11-06 22:55:44,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=442, Invalid=12668, Unknown=0, NotChecked=0, Total=13110 [2023-11-06 22:55:44,478 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 212 mSDsluCounter, 4857 mSDsCounter, 0 mSdLazyCounter, 4125 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 4948 SdHoareTripleChecker+Invalid, 4143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 4125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:55:44,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 4948 Invalid, 4143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 4125 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-06 22:55:44,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-06 22:55:44,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2023-11-06 22:55:44,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0179640718562875) internal successors, (170), 167 states have internal predecessors, (170), 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) [2023-11-06 22:55:44,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2023-11-06 22:55:44,484 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 163 [2023-11-06 22:55:44,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:55:44,484 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2023-11-06 22:55:44,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 4.075) internal successors, (326), 80 states have internal predecessors, (326), 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) [2023-11-06 22:55:44,485 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2023-11-06 22:55:44,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-06 22:55:44,486 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:55:44,486 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:44,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:44,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-06 22:55:44,691 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:55:44,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2039554009, now seen corresponding path program 34 times [2023-11-06 22:55:44,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:44,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833000826] [2023-11-06 22:55:44,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:44,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 512 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:47,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:47,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833000826] [2023-11-06 22:55:47,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833000826] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:47,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838909548] [2023-11-06 22:55:47,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:55:47,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:47,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:47,160 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:47,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-06 22:55:47,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:55:47,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:47,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 177 conjunts are in the unsatisfiable core [2023-11-06 22:55:47,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:47,957 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:55:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 578 proven. 766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:49,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 630 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:52,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838909548] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:52,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:52,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 101 [2023-11-06 22:55:52,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486076854] [2023-11-06 22:55:52,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:52,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2023-11-06 22:55:52,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:52,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2023-11-06 22:55:52,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1425, Invalid=8877, Unknown=0, NotChecked=0, Total=10302 [2023-11-06 22:55:52,425 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 102 states, 101 states have (on average 4.03960396039604) internal successors, (408), 102 states have internal predecessors, (408), 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) [2023-11-06 22:55:55,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:55:55,636 INFO L93 Difference]: Finished difference Result 175 states and 177 transitions. [2023-11-06 22:55:55,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-06 22:55:55,637 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 101 states have (on average 4.03960396039604) internal successors, (408), 102 states have internal predecessors, (408), 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 167 [2023-11-06 22:55:55,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:55:55,638 INFO L225 Difference]: With dead ends: 175 [2023-11-06 22:55:55,638 INFO L226 Difference]: Without dead ends: 175 [2023-11-06 22:55:55,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5891 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2924, Invalid=16816, Unknown=0, NotChecked=0, Total=19740 [2023-11-06 22:55:55,640 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 796 mSDsluCounter, 2109 mSDsCounter, 0 mSdLazyCounter, 3026 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 2185 SdHoareTripleChecker+Invalid, 3030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 3026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:55:55,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 2185 Invalid, 3030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 3026 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 22:55:55,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-06 22:55:55,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2023-11-06 22:55:55,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 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) [2023-11-06 22:55:55,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2023-11-06 22:55:55,645 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 167 [2023-11-06 22:55:55,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:55:55,645 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2023-11-06 22:55:55,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 101 states have (on average 4.03960396039604) internal successors, (408), 102 states have internal predecessors, (408), 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) [2023-11-06 22:55:55,646 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2023-11-06 22:55:55,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-06 22:55:55,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:55:55,647 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:55,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:55,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:55,856 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 22:55:55,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:55,856 INFO L85 PathProgramCache]: Analyzing trace with hash 820520129, now seen corresponding path program 35 times [2023-11-06 22:55:55,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:55,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815581668] [2023-11-06 22:55:55,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:55,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:55,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 36 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:57,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:57,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815581668] [2023-11-06 22:55:57,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815581668] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:57,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385650734] [2023-11-06 22:55:57,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:55:57,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:57,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:57,262 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:57,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1fb075-1fe8-4f5b-91fb-b63bb0dbba1a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-06 22:56:18,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2023-11-06 22:56:18,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:18,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-06 22:56:18,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 36 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:18,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 36 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:21,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385650734] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:21,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:56:21,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 84 [2023-11-06 22:56:21,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392001761] [2023-11-06 22:56:21,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:21,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-11-06 22:56:21,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:21,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-11-06 22:56:21,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=6752, Unknown=0, NotChecked=0, Total=6972 [2023-11-06 22:56:21,239 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand has 84 states, 84 states have (on average 4.095238095238095) internal successors, (344), 84 states have internal predecessors, (344), 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)