./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-examples/sanfoundry_24-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff 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_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-examples/sanfoundry_24-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7e3ff0b77765ac98635f2070c186c57a6cae0bb79eb8bc9016d9d716e81867aa --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:57:58,306 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:57:58,376 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:57:58,382 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:57:58,383 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:57:58,420 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:57:58,421 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:57:58,422 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:57:58,422 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:57:58,426 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:57:58,428 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:57:58,428 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:57:58,429 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:57:58,434 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:57:58,434 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:57:58,435 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:57:58,436 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:57:58,437 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:57:58,437 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:57:58,437 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:57:58,438 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:57:58,438 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:57:58,439 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:57:58,439 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:57:58,440 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:57:58,440 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:57:58,441 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:57:58,441 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:57:58,442 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:57:58,442 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:57:58,443 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:57:58,444 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:57:58,444 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:57:58,444 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:57:58,444 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:57:58,445 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:57:58,445 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:57:58,445 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:57:58,468 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_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e3ff0b77765ac98635f2070c186c57a6cae0bb79eb8bc9016d9d716e81867aa [2023-11-19 07:57:58,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:57:58,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:57:58,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:57:58,820 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:57:58,821 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:57:58,822 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/array-examples/sanfoundry_24-2.i [2023-11-19 07:58:01,777 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:58:02,082 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:58:02,083 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/sv-benchmarks/c/array-examples/sanfoundry_24-2.i [2023-11-19 07:58:02,093 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/data/41e27303e/ac47f1ff99214ff289264e746cef023b/FLAG2a7232926 [2023-11-19 07:58:02,113 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/data/41e27303e/ac47f1ff99214ff289264e746cef023b [2023-11-19 07:58:02,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:58:02,122 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:58:02,128 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:58:02,128 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:58:02,134 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:58:02,137 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:58:02" (1/1) ... [2023-11-19 07:58:02,139 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17d04e29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:02, skipping insertion in model container [2023-11-19 07:58:02,139 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:58:02" (1/1) ... [2023-11-19 07:58:02,167 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:58:02,353 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:58:02,364 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:58:02,386 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:58:02,403 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:58:02,404 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:02 WrapperNode [2023-11-19 07:58:02,404 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:58:02,406 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:58:02,406 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:58:02,406 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:58:02,413 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:02" (1/1) ... [2023-11-19 07:58:02,420 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:02" (1/1) ... [2023-11-19 07:58:02,450 INFO L138 Inliner]: procedures = 18, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2023-11-19 07:58:02,453 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:58:02,453 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:58:02,454 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:58:02,454 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:58:02,464 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:02" (1/1) ... [2023-11-19 07:58:02,464 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:02" (1/1) ... [2023-11-19 07:58:02,471 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:02" (1/1) ... [2023-11-19 07:58:02,471 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:02" (1/1) ... [2023-11-19 07:58:02,485 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:02" (1/1) ... [2023-11-19 07:58:02,498 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:02" (1/1) ... [2023-11-19 07:58:02,500 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:02" (1/1) ... [2023-11-19 07:58:02,501 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:02" (1/1) ... [2023-11-19 07:58:02,504 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:58:02,505 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:58:02,505 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:58:02,505 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:58:02,506 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:02" (1/1) ... [2023-11-19 07:58:02,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:58:02,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:02,547 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:58:02,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:58:02,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:58:02,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:58:02,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:58:02,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:58:02,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:58:02,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:58:02,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:58:02,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 07:58:02,592 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 07:58:02,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:58:02,691 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:58:02,693 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:58:02,926 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:58:02,934 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:58:02,934 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:58:02,938 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:58:02 BoogieIcfgContainer [2023-11-19 07:58:02,938 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:58:02,942 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:58:02,942 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:58:02,945 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:58:02,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:58:02" (1/3) ... [2023-11-19 07:58:02,946 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49235866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:58:02, skipping insertion in model container [2023-11-19 07:58:02,947 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:02" (2/3) ... [2023-11-19 07:58:02,947 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49235866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:58:02, skipping insertion in model container [2023-11-19 07:58:02,947 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:58:02" (3/3) ... [2023-11-19 07:58:02,949 INFO L112 eAbstractionObserver]: Analyzing ICFG sanfoundry_24-2.i [2023-11-19 07:58:02,969 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:58:02,970 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-11-19 07:58:03,016 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:58:03,022 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;@233c2d1b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:58:03,023 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-19 07:58:03,026 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 32 states have (on average 1.6875) internal successors, (54), 44 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:58:03,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 07:58:03,031 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:58:03,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-19 07:58:03,033 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:58:03,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:03,037 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2023-11-19 07:58:03,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:03,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248789002] [2023-11-19 07:58:03,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:03,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:03,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:03,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248789002] [2023-11-19 07:58:03,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248789002] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:03,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:03,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:58:03,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639501854] [2023-11-19 07:58:03,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:03,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:03,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:03,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:03,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:03,413 INFO L87 Difference]: Start difference. First operand has 48 states, 32 states have (on average 1.6875) internal successors, (54), 44 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:03,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:58:03,518 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2023-11-19 07:58:03,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:03,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-19 07:58:03,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:58:03,536 INFO L225 Difference]: With dead ends: 42 [2023-11-19 07:58:03,536 INFO L226 Difference]: Without dead ends: 40 [2023-11-19 07:58:03,538 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 [2023-11-19 07:58:03,542 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 29 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:58:03,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 44 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:58:03,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-19 07:58:03,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-19 07:58:03,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 36 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:58:03,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2023-11-19 07:58:03,583 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 4 [2023-11-19 07:58:03,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:58:03,584 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2023-11-19 07:58:03,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:03,584 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2023-11-19 07:58:03,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 07:58:03,585 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:58:03,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-19 07:58:03,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:58:03,586 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:58:03,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:03,587 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2023-11-19 07:58:03,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:03,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554182469] [2023-11-19 07:58:03,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:03,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:03,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:03,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554182469] [2023-11-19 07:58:03,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554182469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:03,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:03,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:58:03,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589497037] [2023-11-19 07:58:03,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:03,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:03,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:03,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:03,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:03,816 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:03,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:58:03,932 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2023-11-19 07:58:03,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:03,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-19 07:58:03,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:58:03,934 INFO L225 Difference]: With dead ends: 63 [2023-11-19 07:58:03,934 INFO L226 Difference]: Without dead ends: 63 [2023-11-19 07:58:03,935 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 [2023-11-19 07:58:03,937 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:58:03,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 49 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:58:03,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-19 07:58:03,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2023-11-19 07:58:03,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.380952380952381) internal successors, (58), 48 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:58:03,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2023-11-19 07:58:03,949 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 4 [2023-11-19 07:58:03,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:58:03,950 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2023-11-19 07:58:03,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:03,950 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2023-11-19 07:58:03,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 07:58:03,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:58:03,952 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:03,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:58:03,952 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:58:03,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:03,953 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2023-11-19 07:58:03,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:03,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246261582] [2023-11-19 07:58:03,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:03,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:03,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:04,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:04,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246261582] [2023-11-19 07:58:04,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246261582] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:04,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450752903] [2023-11-19 07:58:04,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:04,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:04,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:04,140 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:04,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:58:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:04,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:58:04,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:04,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:58:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:04,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:04,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450752903] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:04,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:04,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-19 07:58:04,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635246269] [2023-11-19 07:58:04,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:04,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:58:04,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:04,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:58:04,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:58:04,569 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 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) [2023-11-19 07:58:04,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:58:04,872 INFO L93 Difference]: Finished difference Result 125 states and 158 transitions. [2023-11-19 07:58:04,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:58:04,873 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 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) Word has length 8 [2023-11-19 07:58:04,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:58:04,876 INFO L225 Difference]: With dead ends: 125 [2023-11-19 07:58:04,876 INFO L226 Difference]: Without dead ends: 125 [2023-11-19 07:58:04,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:58:04,878 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 157 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:58:04,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 95 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:58:04,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-19 07:58:04,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 106. [2023-11-19 07:58:04,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 92 states have (on average 1.2934782608695652) internal successors, (119), 96 states have internal predecessors, (119), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 07:58:04,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 135 transitions. [2023-11-19 07:58:04,893 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 135 transitions. Word has length 8 [2023-11-19 07:58:04,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:58:04,894 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 135 transitions. [2023-11-19 07:58:04,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 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) [2023-11-19 07:58:04,894 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 135 transitions. [2023-11-19 07:58:04,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 07:58:04,895 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:58:04,895 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:04,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:05,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:05,111 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:58:05,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:05,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1897655597, now seen corresponding path program 1 times [2023-11-19 07:58:05,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:05,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947490899] [2023-11-19 07:58:05,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:05,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:05,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:05,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947490899] [2023-11-19 07:58:05,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947490899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:05,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:05,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:58:05,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724801290] [2023-11-19 07:58:05,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:05,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:58:05,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:05,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:58:05,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:58:05,259 INFO L87 Difference]: Start difference. First operand 106 states and 135 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2023-11-19 07:58:05,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:58:05,328 INFO L93 Difference]: Finished difference Result 105 states and 134 transitions. [2023-11-19 07:58:05,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:58:05,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2023-11-19 07:58:05,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:58:05,331 INFO L225 Difference]: With dead ends: 105 [2023-11-19 07:58:05,331 INFO L226 Difference]: Without dead ends: 103 [2023-11-19 07:58:05,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:58:05,332 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 23 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:58:05,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 67 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:58:05,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-19 07:58:05,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-11-19 07:58:05,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 90 states have (on average 1.2444444444444445) internal successors, (112), 93 states have internal predecessors, (112), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 07:58:05,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2023-11-19 07:58:05,344 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 9 [2023-11-19 07:58:05,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:58:05,345 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2023-11-19 07:58:05,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2023-11-19 07:58:05,345 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2023-11-19 07:58:05,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 07:58:05,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:58:05,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:05,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:58:05,347 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:58:05,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:05,347 INFO L85 PathProgramCache]: Analyzing trace with hash 443610757, now seen corresponding path program 1 times [2023-11-19 07:58:05,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:05,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951720593] [2023-11-19 07:58:05,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:05,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:05,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:05,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951720593] [2023-11-19 07:58:05,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951720593] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:05,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:05,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:58:05,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622495726] [2023-11-19 07:58:05,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:05,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:58:05,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:05,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:58:05,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:58:05,439 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:05,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:58:05,494 INFO L93 Difference]: Finished difference Result 127 states and 155 transitions. [2023-11-19 07:58:05,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:58:05,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-19 07:58:05,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:58:05,498 INFO L225 Difference]: With dead ends: 127 [2023-11-19 07:58:05,499 INFO L226 Difference]: Without dead ends: 121 [2023-11-19 07:58:05,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:58:05,501 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:58:05,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 74 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:58:05,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-19 07:58:05,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 104. [2023-11-19 07:58:05,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 91 states have (on average 1.2197802197802199) internal successors, (111), 94 states have internal predecessors, (111), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 07:58:05,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2023-11-19 07:58:05,524 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 15 [2023-11-19 07:58:05,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:58:05,525 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2023-11-19 07:58:05,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:05,525 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2023-11-19 07:58:05,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 07:58:05,526 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:58:05,526 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:05,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:58:05,526 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:58:05,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:05,527 INFO L85 PathProgramCache]: Analyzing trace with hash -144029224, now seen corresponding path program 1 times [2023-11-19 07:58:05,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:05,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968980528] [2023-11-19 07:58:05,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:05,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:58:05,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:05,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968980528] [2023-11-19 07:58:05,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968980528] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:05,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:05,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:58:05,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342483680] [2023-11-19 07:58:05,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:05,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:58:05,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:05,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:58:05,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:58:05,623 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:05,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:58:05,678 INFO L93 Difference]: Finished difference Result 119 states and 146 transitions. [2023-11-19 07:58:05,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:58:05,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-19 07:58:05,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:58:05,680 INFO L225 Difference]: With dead ends: 119 [2023-11-19 07:58:05,680 INFO L226 Difference]: Without dead ends: 119 [2023-11-19 07:58:05,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:58:05,682 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 38 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:58:05,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 49 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:58:05,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-19 07:58:05,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2023-11-19 07:58:05,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 91 states have (on average 1.2197802197802199) internal successors, (111), 94 states have internal predecessors, (111), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 07:58:05,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2023-11-19 07:58:05,691 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 14 [2023-11-19 07:58:05,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:58:05,692 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2023-11-19 07:58:05,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:05,692 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2023-11-19 07:58:05,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 07:58:05,693 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:58:05,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:05,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:58:05,694 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:58:05,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:05,695 INFO L85 PathProgramCache]: Analyzing trace with hash -978534878, now seen corresponding path program 1 times [2023-11-19 07:58:05,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:05,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019867378] [2023-11-19 07:58:05,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:05,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:58:06,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:06,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019867378] [2023-11-19 07:58:06,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019867378] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:06,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:06,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 07:58:06,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008897310] [2023-11-19 07:58:06,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:06,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:58:06,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:06,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:58:06,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:58:06,012 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:06,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:58:06,157 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2023-11-19 07:58:06,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:58:06,158 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-19 07:58:06,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:58:06,160 INFO L225 Difference]: With dead ends: 112 [2023-11-19 07:58:06,160 INFO L226 Difference]: Without dead ends: 112 [2023-11-19 07:58:06,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:58:06,162 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:58:06,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 184 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:58:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-19 07:58:06,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2023-11-19 07:58:06,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 94 states have (on average 1.2127659574468086) internal successors, (114), 97 states have internal predecessors, (114), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 07:58:06,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 130 transitions. [2023-11-19 07:58:06,171 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 130 transitions. Word has length 19 [2023-11-19 07:58:06,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:58:06,181 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 130 transitions. [2023-11-19 07:58:06,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:06,182 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 130 transitions. [2023-11-19 07:58:06,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 07:58:06,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:58:06,183 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:06,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:58:06,184 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:58:06,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:06,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1123657531, now seen corresponding path program 1 times [2023-11-19 07:58:06,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:06,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603751159] [2023-11-19 07:58:06,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:06,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:58:06,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:06,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603751159] [2023-11-19 07:58:06,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603751159] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:06,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758977932] [2023-11-19 07:58:06,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:06,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:06,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:06,308 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:06,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:58:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:06,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:58:06,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:06,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:06,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-19 07:58:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:06,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758977932] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:06,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:06,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-11-19 07:58:06,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750513783] [2023-11-19 07:58:06,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:06,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:58:06,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:06,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:58:06,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:58:06,773 INFO L87 Difference]: Start difference. First operand 108 states and 130 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 15 states have internal predecessors, (48), 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) [2023-11-19 07:58:07,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:58:07,089 INFO L93 Difference]: Finished difference Result 164 states and 201 transitions. [2023-11-19 07:58:07,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:58:07,090 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 15 states have internal predecessors, (48), 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 18 [2023-11-19 07:58:07,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:58:07,091 INFO L225 Difference]: With dead ends: 164 [2023-11-19 07:58:07,092 INFO L226 Difference]: Without dead ends: 164 [2023-11-19 07:58:07,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:58:07,093 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 250 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:58:07,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 181 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:58:07,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-11-19 07:58:07,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 105. [2023-11-19 07:58:07,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 91 states have (on average 1.2197802197802199) internal successors, (111), 94 states have internal predecessors, (111), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 07:58:07,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2023-11-19 07:58:07,102 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 18 [2023-11-19 07:58:07,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:58:07,103 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2023-11-19 07:58:07,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 15 states have internal predecessors, (48), 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) [2023-11-19 07:58:07,104 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2023-11-19 07:58:07,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 07:58:07,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:58:07,105 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2023-11-19 07:58:07,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:07,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:58:07,328 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:58:07,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:07,329 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2023-11-19 07:58:07,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:07,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250391509] [2023-11-19 07:58:07,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:07,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:07,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:07,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250391509] [2023-11-19 07:58:07,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250391509] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:07,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374683617] [2023-11-19 07:58:07,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:58:07,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:07,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:07,614 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:07,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:58:07,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:58:07,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:07,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:58:07,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:07,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:58:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:07,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:08,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374683617] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:08,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:08,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-19 07:58:08,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9942617] [2023-11-19 07:58:08,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:08,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:58:08,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:08,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:58:08,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:58:08,200 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 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) [2023-11-19 07:58:09,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:58:09,083 INFO L93 Difference]: Finished difference Result 295 states and 368 transitions. [2023-11-19 07:58:09,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:58:09,084 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 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) Word has length 20 [2023-11-19 07:58:09,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:58:09,086 INFO L225 Difference]: With dead ends: 295 [2023-11-19 07:58:09,087 INFO L226 Difference]: Without dead ends: 295 [2023-11-19 07:58:09,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:58:09,089 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 428 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:58:09,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 450 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:58:09,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-11-19 07:58:09,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 228. [2023-11-19 07:58:09,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 202 states have (on average 1.2178217821782178) internal successors, (246), 205 states have internal predecessors, (246), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-19 07:58:09,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 286 transitions. [2023-11-19 07:58:09,108 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 286 transitions. Word has length 20 [2023-11-19 07:58:09,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:58:09,108 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 286 transitions. [2023-11-19 07:58:09,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 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) [2023-11-19 07:58:09,108 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 286 transitions. [2023-11-19 07:58:09,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-19 07:58:09,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:58:09,114 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:09,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:09,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 07:58:09,334 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:58:09,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:09,335 INFO L85 PathProgramCache]: Analyzing trace with hash -64649085, now seen corresponding path program 1 times [2023-11-19 07:58:09,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:09,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117779544] [2023-11-19 07:58:09,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:09,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:58:09,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:09,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117779544] [2023-11-19 07:58:09,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117779544] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:09,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:09,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 07:58:09,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989025736] [2023-11-19 07:58:09,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:09,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:58:09,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:09,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:58:09,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:58:09,725 INFO L87 Difference]: Start difference. First operand 228 states and 286 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:09,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:58:09,865 INFO L93 Difference]: Finished difference Result 234 states and 292 transitions. [2023-11-19 07:58:09,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:58:09,866 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-19 07:58:09,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:58:09,868 INFO L225 Difference]: With dead ends: 234 [2023-11-19 07:58:09,869 INFO L226 Difference]: Without dead ends: 234 [2023-11-19 07:58:09,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:58:09,870 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:58:09,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 172 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:58:09,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-11-19 07:58:09,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 224. [2023-11-19 07:58:09,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 199 states have (on average 1.2160804020100502) internal successors, (242), 201 states have internal predecessors, (242), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-19 07:58:09,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 282 transitions. [2023-11-19 07:58:09,883 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 282 transitions. Word has length 25 [2023-11-19 07:58:09,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:58:09,884 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 282 transitions. [2023-11-19 07:58:09,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:09,885 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 282 transitions. [2023-11-19 07:58:09,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-19 07:58:09,888 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:58:09,888 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-19 07:58:09,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:58:09,889 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:58:09,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:09,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1157298733, now seen corresponding path program 2 times [2023-11-19 07:58:09,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:09,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153599830] [2023-11-19 07:58:09,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:09,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-19 07:58:10,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:10,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153599830] [2023-11-19 07:58:10,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153599830] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:10,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431715921] [2023-11-19 07:58:10,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:58:10,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:10,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:10,147 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:10,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:58:10,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:58:10,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:10,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:58:10,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:10,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:58:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-19 07:58:10,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:10,778 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-19 07:58:10,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431715921] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:10,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:10,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-19 07:58:10,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408407179] [2023-11-19 07:58:10,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:10,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:58:10,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:10,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:58:10,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:58:10,782 INFO L87 Difference]: Start difference. First operand 224 states and 282 transitions. Second operand has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 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) [2023-11-19 07:58:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:58:11,612 INFO L93 Difference]: Finished difference Result 391 states and 494 transitions. [2023-11-19 07:58:11,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:58:11,613 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 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 42 [2023-11-19 07:58:11,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:58:11,617 INFO L225 Difference]: With dead ends: 391 [2023-11-19 07:58:11,618 INFO L226 Difference]: Without dead ends: 391 [2023-11-19 07:58:11,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=315, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:58:11,619 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 652 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:58:11,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [662 Valid, 424 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:58:11,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2023-11-19 07:58:11,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 221. [2023-11-19 07:58:11,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 196 states have (on average 1.219387755102041) internal successors, (239), 198 states have internal predecessors, (239), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-19 07:58:11,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 279 transitions. [2023-11-19 07:58:11,637 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 279 transitions. Word has length 42 [2023-11-19 07:58:11,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:58:11,637 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 279 transitions. [2023-11-19 07:58:11,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 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) [2023-11-19 07:58:11,638 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 279 transitions. [2023-11-19 07:58:11,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 07:58:11,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:58:11,640 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1] [2023-11-19 07:58:11,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:11,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:58:11,869 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:58:11,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:11,869 INFO L85 PathProgramCache]: Analyzing trace with hash -256132636, now seen corresponding path program 3 times [2023-11-19 07:58:11,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:11,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669260216] [2023-11-19 07:58:11,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:11,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:12,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:12,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669260216] [2023-11-19 07:58:12,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669260216] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:12,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685484545] [2023-11-19 07:58:12,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:58:12,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:12,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:12,323 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:12,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:58:12,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-19 07:58:12,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:12,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:58:12,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:12,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:58:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:13,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:14,150 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:14,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685484545] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:14,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:14,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 36 [2023-11-19 07:58:14,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270523031] [2023-11-19 07:58:14,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:14,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-19 07:58:14,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:14,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-19 07:58:14,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=838, Unknown=0, NotChecked=0, Total=1332 [2023-11-19 07:58:14,158 INFO L87 Difference]: Start difference. First operand 221 states and 279 transitions. Second operand has 37 states, 36 states have (on average 3.611111111111111) internal successors, (130), 37 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) [2023-11-19 07:58:16,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:58:16,531 INFO L93 Difference]: Finished difference Result 651 states and 826 transitions. [2023-11-19 07:58:16,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 07:58:16,532 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.611111111111111) internal successors, (130), 37 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 44 [2023-11-19 07:58:16,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:58:16,537 INFO L225 Difference]: With dead ends: 651 [2023-11-19 07:58:16,537 INFO L226 Difference]: Without dead ends: 651 [2023-11-19 07:58:16,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=764, Invalid=1398, Unknown=0, NotChecked=0, Total=2162 [2023-11-19 07:58:16,540 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 1231 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1255 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:58:16,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1255 Valid, 1120 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 1940 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-19 07:58:16,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2023-11-19 07:58:16,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 464. [2023-11-19 07:58:16,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 415 states have (on average 1.219277108433735) internal successors, (506), 417 states have internal predecessors, (506), 44 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-19 07:58:16,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 594 transitions. [2023-11-19 07:58:16,562 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 594 transitions. Word has length 44 [2023-11-19 07:58:16,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:58:16,563 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 594 transitions. [2023-11-19 07:58:16,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.611111111111111) internal successors, (130), 37 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) [2023-11-19 07:58:16,563 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 594 transitions. [2023-11-19 07:58:16,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-19 07:58:16,566 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:58:16,566 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2023-11-19 07:58:16,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:16,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:58:16,788 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:58:16,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:16,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1437953553, now seen corresponding path program 3 times [2023-11-19 07:58:16,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:16,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460246797] [2023-11-19 07:58:16,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:16,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-11-19 07:58:17,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:17,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460246797] [2023-11-19 07:58:17,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460246797] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:17,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908040190] [2023-11-19 07:58:17,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:58:17,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:17,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:17,673 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:17,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:58:17,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:58:17,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:17,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:58:17,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 59 proven. 10 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2023-11-19 07:58:17,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2023-11-19 07:58:18,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908040190] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:18,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:18,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 25 [2023-11-19 07:58:18,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232519366] [2023-11-19 07:58:18,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:18,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-19 07:58:18,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:18,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-19 07:58:18,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2023-11-19 07:58:18,508 INFO L87 Difference]: Start difference. First operand 464 states and 594 transitions. Second operand has 26 states, 25 states have (on average 3.32) internal successors, (83), 26 states have internal predecessors, (83), 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) [2023-11-19 07:58:20,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:58:20,495 INFO L93 Difference]: Finished difference Result 669 states and 854 transitions. [2023-11-19 07:58:20,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-19 07:58:20,496 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.32) internal successors, (83), 26 states have internal predecessors, (83), 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 90 [2023-11-19 07:58:20,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:58:20,498 INFO L225 Difference]: With dead ends: 669 [2023-11-19 07:58:20,498 INFO L226 Difference]: Without dead ends: 93 [2023-11-19 07:58:20,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=501, Invalid=1305, Unknown=0, NotChecked=0, Total=1806 [2023-11-19 07:58:20,500 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 1277 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 1976 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 2272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 1976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:58:20,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1277 Valid, 1128 Invalid, 2272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 1976 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-19 07:58:20,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-19 07:58:20,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-11-19 07:58:20,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 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) [2023-11-19 07:58:20,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2023-11-19 07:58:20,519 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2023-11-19 07:58:20,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:58:20,519 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2023-11-19 07:58:20,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.32) internal successors, (83), 26 states have internal predecessors, (83), 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) [2023-11-19 07:58:20,520 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2023-11-19 07:58:20,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-19 07:58:20,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:58:20,521 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1] [2023-11-19 07:58:20,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-19 07:58:20,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:58:20,722 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:58:20,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:20,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1667733768, now seen corresponding path program 4 times [2023-11-19 07:58:20,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:20,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228884134] [2023-11-19 07:58:20,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:20,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:22,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:22,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228884134] [2023-11-19 07:58:22,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228884134] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:22,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463012381] [2023-11-19 07:58:22,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:58:22,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:22,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:22,067 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:22,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:58:22,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:58:22,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:22,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-19 07:58:22,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:22,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:58:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:24,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:26,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463012381] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:26,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:26,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 69 [2023-11-19 07:58:26,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751737517] [2023-11-19 07:58:26,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:26,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-11-19 07:58:26,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:26,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-11-19 07:58:26,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1194, Invalid=3636, Unknown=0, NotChecked=0, Total=4830 [2023-11-19 07:58:26,320 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 70 states, 69 states have (on average 3.9130434782608696) internal successors, (270), 70 states have internal predecessors, (270), 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) [2023-11-19 07:58:30,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:58:30,450 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2023-11-19 07:58:30,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-19 07:58:30,451 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 3.9130434782608696) internal successors, (270), 70 states have internal predecessors, (270), 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 92 [2023-11-19 07:58:30,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:58:30,452 INFO L225 Difference]: With dead ends: 189 [2023-11-19 07:58:30,453 INFO L226 Difference]: Without dead ends: 189 [2023-11-19 07:58:30,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2442 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2734, Invalid=5638, Unknown=0, NotChecked=0, Total=8372 [2023-11-19 07:58:30,456 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 50 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 2599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:58:30,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 840 Invalid, 2599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2597 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-19 07:58:30,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-19 07:58:30,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2023-11-19 07:58:30,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0053191489361701) internal successors, (189), 188 states have internal predecessors, (189), 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) [2023-11-19 07:58:30,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2023-11-19 07:58:30,462 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 92 [2023-11-19 07:58:30,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:58:30,462 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2023-11-19 07:58:30,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 3.9130434782608696) internal successors, (270), 70 states have internal predecessors, (270), 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) [2023-11-19 07:58:30,463 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2023-11-19 07:58:30,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-19 07:58:30,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:58:30,465 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 46, 46, 1, 1, 1] [2023-11-19 07:58:30,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:30,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 07:58:30,687 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:58:30,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:30,687 INFO L85 PathProgramCache]: Analyzing trace with hash -78753968, now seen corresponding path program 5 times [2023-11-19 07:58:30,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:30,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310585400] [2023-11-19 07:58:30,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:30,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:30,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:34,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:34,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310585400] [2023-11-19 07:58:34,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310585400] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:34,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075899490] [2023-11-19 07:58:34,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:58:34,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:34,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:34,412 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:34,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc779fee-8847-4f99-9cf1-37b8b4024c93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process