./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl --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 f22afdea3888c472e42c0b4bee511704d4ceb9c1e2d9f4db0ce5ffbd6de758f0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:14:03,627 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:14:03,697 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:14:03,703 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:14:03,704 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:14:03,731 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:14:03,732 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:14:03,733 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:14:03,734 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:14:03,734 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:14:03,735 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:14:03,736 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:14:03,737 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:14:03,737 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:14:03,738 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:14:03,739 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:14:03,739 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:14:03,740 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:14:03,741 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:14:03,741 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:14:03,742 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:14:03,743 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:14:03,744 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:14:03,744 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:14:03,745 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:14:03,746 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:14:03,746 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:14:03,747 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:14:03,747 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:14:03,748 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:14:03,749 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:14:03,749 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:14:03,750 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:14:03,750 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:14:03,751 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:14:03,751 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:14:03,752 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:14:03,752 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:14:03,753 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_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f22afdea3888c472e42c0b4bee511704d4ceb9c1e2d9f4db0ce5ffbd6de758f0 [2023-11-12 02:14:04,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:14:04,087 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:14:04,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:14:04,091 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:14:04,092 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:14:04,094 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i [2023-11-12 02:14:07,269 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:14:07,632 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:14:07,634 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i [2023-11-12 02:14:07,657 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/data/bd977e2bf/f9d555f4ee094240a09e25e57be53a62/FLAGbfd8bfde4 [2023-11-12 02:14:07,683 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/data/bd977e2bf/f9d555f4ee094240a09e25e57be53a62 [2023-11-12 02:14:07,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:14:07,693 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:14:07,697 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:14:07,697 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:14:07,703 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:14:07,705 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:14:07" (1/1) ... [2023-11-12 02:14:07,707 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3470cc63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:07, skipping insertion in model container [2023-11-12 02:14:07,707 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:14:07" (1/1) ... [2023-11-12 02:14:07,770 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:14:08,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:14:08,136 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:14:08,206 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:14:08,243 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:14:08,244 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:08 WrapperNode [2023-11-12 02:14:08,244 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:14:08,246 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:14:08,246 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:14:08,246 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:14:08,254 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:08" (1/1) ... [2023-11-12 02:14:08,278 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:08" (1/1) ... [2023-11-12 02:14:08,301 INFO L138 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2023-11-12 02:14:08,301 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:14:08,302 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:14:08,302 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:14:08,303 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:14:08,312 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:08" (1/1) ... [2023-11-12 02:14:08,313 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:08" (1/1) ... [2023-11-12 02:14:08,327 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:08" (1/1) ... [2023-11-12 02:14:08,327 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:08" (1/1) ... [2023-11-12 02:14:08,341 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:08" (1/1) ... [2023-11-12 02:14:08,352 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:08" (1/1) ... [2023-11-12 02:14:08,353 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:08" (1/1) ... [2023-11-12 02:14:08,355 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:08" (1/1) ... [2023-11-12 02:14:08,358 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:14:08,359 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:14:08,359 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:14:08,359 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:14:08,361 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:08" (1/1) ... [2023-11-12 02:14:08,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:14:08,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:08,401 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:14:08,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:14:08,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:14:08,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:14:08,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:14:08,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:14:08,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:14:08,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:14:08,589 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:14:08,591 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:14:08,810 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:14:08,816 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:14:08,817 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:14:08,819 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:14:08 BoogieIcfgContainer [2023-11-12 02:14:08,819 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:14:08,822 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:14:08,823 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:14:08,826 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:14:08,827 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:14:07" (1/3) ... [2023-11-12 02:14:08,827 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d5ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:14:08, skipping insertion in model container [2023-11-12 02:14:08,828 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:08" (2/3) ... [2023-11-12 02:14:08,828 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d5ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:14:08, skipping insertion in model container [2023-11-12 02:14:08,828 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:14:08" (3/3) ... [2023-11-12 02:14:08,830 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstpcpy-alloca-1.i [2023-11-12 02:14:08,849 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:14:08,849 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-11-12 02:14:08,895 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:14:08,904 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;@80e4847, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:14:08,908 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-12 02:14:08,914 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.8) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:08,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 02:14:08,921 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:08,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 02:14:08,922 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:08,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:08,928 INFO L85 PathProgramCache]: Analyzing trace with hash 889510841, now seen corresponding path program 1 times [2023-11-12 02:14:08,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:08,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801333836] [2023-11-12 02:14:08,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:08,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:09,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:09,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801333836] [2023-11-12 02:14:09,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801333836] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:09,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:09,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:14:09,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669406366] [2023-11-12 02:14:09,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:09,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:14:09,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:09,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:14:09,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:14:09,334 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.8) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:09,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:09,448 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2023-11-12 02:14:09,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:14:09,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-11-12 02:14:09,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:09,460 INFO L225 Difference]: With dead ends: 33 [2023-11-12 02:14:09,460 INFO L226 Difference]: Without dead ends: 31 [2023-11-12 02:14:09,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:14:09,466 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 54 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:09,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 35 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:14:09,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-12 02:14:09,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-11-12 02:14:09,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.65) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:09,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-11-12 02:14:09,506 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 6 [2023-11-12 02:14:09,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:09,506 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-11-12 02:14:09,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:09,507 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-11-12 02:14:09,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 02:14:09,508 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:09,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 02:14:09,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:14:09,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:09,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:09,509 INFO L85 PathProgramCache]: Analyzing trace with hash 889512763, now seen corresponding path program 1 times [2023-11-12 02:14:09,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:09,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521801105] [2023-11-12 02:14:09,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:09,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:09,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:09,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521801105] [2023-11-12 02:14:09,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521801105] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:09,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:09,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:14:09,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727954689] [2023-11-12 02:14:09,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:09,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:14:09,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:09,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:14:09,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:14:09,553 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:09,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:09,580 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2023-11-12 02:14:09,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:14:09,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-11-12 02:14:09,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:09,582 INFO L225 Difference]: With dead ends: 30 [2023-11-12 02:14:09,582 INFO L226 Difference]: Without dead ends: 29 [2023-11-12 02:14:09,582 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 [2023-11-12 02:14:09,584 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:09,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:14:09,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-12 02:14:09,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-11-12 02:14:09,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.631578947368421) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:09,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-11-12 02:14:09,591 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 6 [2023-11-12 02:14:09,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:09,591 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-11-12 02:14:09,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:09,592 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-11-12 02:14:09,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 02:14:09,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:09,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:09,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:14:09,593 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:09,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:09,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033068, now seen corresponding path program 1 times [2023-11-12 02:14:09,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:09,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973247276] [2023-11-12 02:14:09,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:09,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:09,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:09,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973247276] [2023-11-12 02:14:09,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973247276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:09,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:09,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:14:09,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361943349] [2023-11-12 02:14:09,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:09,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:14:09,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:09,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:14:09,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:14:09,785 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:09,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:09,815 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2023-11-12 02:14:09,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:14:09,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 02:14:09,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:09,817 INFO L225 Difference]: With dead ends: 26 [2023-11-12 02:14:09,817 INFO L226 Difference]: Without dead ends: 26 [2023-11-12 02:14:09,818 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 [2023-11-12 02:14:09,819 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:09,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 23 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:14:09,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-12 02:14:09,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-12 02:14:09,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:09,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-11-12 02:14:09,825 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 7 [2023-11-12 02:14:09,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:09,826 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-11-12 02:14:09,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:09,827 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-11-12 02:14:09,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 02:14:09,827 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:09,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:09,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:14:09,828 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:09,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:09,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033069, now seen corresponding path program 1 times [2023-11-12 02:14:09,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:09,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689188165] [2023-11-12 02:14:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:09,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:10,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:10,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689188165] [2023-11-12 02:14:10,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689188165] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:10,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:10,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:14:10,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084620654] [2023-11-12 02:14:10,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:10,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:14:10,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:10,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:14:10,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:14:10,273 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:10,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:10,467 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2023-11-12 02:14:10,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:14:10,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 02:14:10,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:10,470 INFO L225 Difference]: With dead ends: 52 [2023-11-12 02:14:10,470 INFO L226 Difference]: Without dead ends: 52 [2023-11-12 02:14:10,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:14:10,475 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 30 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:10,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 105 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:14:10,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-12 02:14:10,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 29. [2023-11-12 02:14:10,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:10,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-11-12 02:14:10,490 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 7 [2023-11-12 02:14:10,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:10,490 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-11-12 02:14:10,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:10,491 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-11-12 02:14:10,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 02:14:10,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:10,493 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:10,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:14:10,494 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:10,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:10,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1805092651, now seen corresponding path program 1 times [2023-11-12 02:14:10,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:10,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593478376] [2023-11-12 02:14:10,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:10,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:10,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:10,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593478376] [2023-11-12 02:14:10,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593478376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:10,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:10,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:14:10,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577624845] [2023-11-12 02:14:10,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:10,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:14:10,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:10,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:14:10,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:14:10,845 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:10,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:10,937 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2023-11-12 02:14:10,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:14:10,938 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 02:14:10,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:10,939 INFO L225 Difference]: With dead ends: 33 [2023-11-12 02:14:10,939 INFO L226 Difference]: Without dead ends: 33 [2023-11-12 02:14:10,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:14:10,943 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:10,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:14:10,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-12 02:14:10,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2023-11-12 02:14:10,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:10,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-11-12 02:14:10,955 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 7 [2023-11-12 02:14:10,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:10,955 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-11-12 02:14:10,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:10,956 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-11-12 02:14:10,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 02:14:10,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:10,956 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:10,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:14:10,957 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:10,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:10,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1762265008, now seen corresponding path program 1 times [2023-11-12 02:14:10,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:10,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191188319] [2023-11-12 02:14:10,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:10,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:11,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:11,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191188319] [2023-11-12 02:14:11,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191188319] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:11,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325798155] [2023-11-12 02:14:11,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:11,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:11,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:11,053 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:11,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:14:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:11,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:14:11,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:11,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:11,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325798155] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:11,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:14:11,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-12 02:14:11,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735451922] [2023-11-12 02:14:11,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:11,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:14:11,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:11,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:14:11,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:14:11,257 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:11,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:11,293 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2023-11-12 02:14:11,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:14:11,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-12 02:14:11,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:11,295 INFO L225 Difference]: With dead ends: 50 [2023-11-12 02:14:11,297 INFO L226 Difference]: Without dead ends: 50 [2023-11-12 02:14:11,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:14:11,303 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:11,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 73 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:14:11,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-12 02:14:11,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 34. [2023-11-12 02:14:11,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:11,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2023-11-12 02:14:11,312 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 11 [2023-11-12 02:14:11,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:11,312 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2023-11-12 02:14:11,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:11,312 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2023-11-12 02:14:11,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 02:14:11,313 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:11,313 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:11,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:11,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:14:11,520 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:11,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:11,520 INFO L85 PathProgramCache]: Analyzing trace with hash 952918382, now seen corresponding path program 1 times [2023-11-12 02:14:11,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:11,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284712460] [2023-11-12 02:14:11,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:11,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:11,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:11,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:11,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284712460] [2023-11-12 02:14:11,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284712460] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:11,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761724303] [2023-11-12 02:14:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:11,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:11,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:11,638 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:11,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:14:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:11,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:14:11,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:11,771 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:11,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761724303] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:11,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:14:11,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-12 02:14:11,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100852532] [2023-11-12 02:14:11,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:11,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:14:11,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:11,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:14:11,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:14:11,774 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:11,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:11,860 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2023-11-12 02:14:11,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:14:11,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-12 02:14:11,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:11,862 INFO L225 Difference]: With dead ends: 63 [2023-11-12 02:14:11,862 INFO L226 Difference]: Without dead ends: 63 [2023-11-12 02:14:11,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:14:11,863 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:11,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 67 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:14:11,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-12 02:14:11,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 35. [2023-11-12 02:14:11,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:11,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-11-12 02:14:11,868 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 11 [2023-11-12 02:14:11,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:11,868 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-11-12 02:14:11,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:11,869 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-11-12 02:14:11,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 02:14:11,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:11,869 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:11,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:12,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:12,070 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:12,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:12,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1632976752, now seen corresponding path program 1 times [2023-11-12 02:14:12,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:12,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285460560] [2023-11-12 02:14:12,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:12,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:12,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:12,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285460560] [2023-11-12 02:14:12,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285460560] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:12,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165202246] [2023-11-12 02:14:12,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:12,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:12,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:12,318 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:12,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:14:12,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:12,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 02:14:12,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:12,474 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-12 02:14:12,486 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 02:14:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:12,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:12,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165202246] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:12,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:12,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-11-12 02:14:12,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785366213] [2023-11-12 02:14:12,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:12,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 02:14:12,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:12,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 02:14:12,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:14:12,995 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:13,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:13,146 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2023-11-12 02:14:13,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:14:13,147 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-12 02:14:13,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:13,148 INFO L225 Difference]: With dead ends: 36 [2023-11-12 02:14:13,148 INFO L226 Difference]: Without dead ends: 36 [2023-11-12 02:14:13,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:14:13,150 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:13,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 68 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:14:13,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-12 02:14:13,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2023-11-12 02:14:13,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:13,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-11-12 02:14:13,157 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 11 [2023-11-12 02:14:13,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:13,157 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-11-12 02:14:13,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:13,158 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-11-12 02:14:13,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 02:14:13,158 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:13,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:13,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:13,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:13,364 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:13,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:13,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1204361265, now seen corresponding path program 1 times [2023-11-12 02:14:13,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:13,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115423809] [2023-11-12 02:14:13,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:13,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:13,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:13,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:13,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115423809] [2023-11-12 02:14:13,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115423809] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:13,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108693153] [2023-11-12 02:14:13,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:13,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:13,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:13,488 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:13,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:14:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:13,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:14:13,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:13,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:13,685 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-11-12 02:14:13,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:13,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108693153] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:13,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:13,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-11-12 02:14:13,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054028730] [2023-11-12 02:14:13,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:13,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:14:13,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:13,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:14:13,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:14:13,758 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:13,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:13,881 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2023-11-12 02:14:13,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:14:13,882 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-12 02:14:13,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:13,886 INFO L225 Difference]: With dead ends: 54 [2023-11-12 02:14:13,887 INFO L226 Difference]: Without dead ends: 54 [2023-11-12 02:14:13,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:14:13,889 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:13,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 92 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:14:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-12 02:14:13,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2023-11-12 02:14:13,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:13,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2023-11-12 02:14:13,909 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 12 [2023-11-12 02:14:13,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:13,910 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2023-11-12 02:14:13,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:13,910 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2023-11-12 02:14:13,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 02:14:13,912 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:13,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:13,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:14,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:14,113 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:14,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:14,113 INFO L85 PathProgramCache]: Analyzing trace with hash -524302895, now seen corresponding path program 1 times [2023-11-12 02:14:14,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:14,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303028446] [2023-11-12 02:14:14,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:14,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:14,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:14,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:14,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303028446] [2023-11-12 02:14:14,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303028446] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:14,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077443600] [2023-11-12 02:14:14,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:14,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:14,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:14,247 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:14,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:14:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:14,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:14:14,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:14,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:14,462 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-11-12 02:14:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:14,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077443600] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:14,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:14,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2023-11-12 02:14:14,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809199148] [2023-11-12 02:14:14,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:14,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:14:14,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:14,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:14:14,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:14:14,558 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:14,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:14,752 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2023-11-12 02:14:14,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:14:14,752 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-12 02:14:14,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:14,753 INFO L225 Difference]: With dead ends: 77 [2023-11-12 02:14:14,753 INFO L226 Difference]: Without dead ends: 77 [2023-11-12 02:14:14,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:14:14,755 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 157 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:14,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 92 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:14:14,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-12 02:14:14,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 35. [2023-11-12 02:14:14,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-11-12 02:14:14,764 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 12 [2023-11-12 02:14:14,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:14,764 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-11-12 02:14:14,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:14,764 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-11-12 02:14:14,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 02:14:14,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:14,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:14,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:14,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:14:14,973 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:14,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:14,974 INFO L85 PathProgramCache]: Analyzing trace with hash -917329905, now seen corresponding path program 1 times [2023-11-12 02:14:14,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:14,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528524423] [2023-11-12 02:14:14,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:14,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:15,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:15,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528524423] [2023-11-12 02:14:15,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528524423] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:15,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:15,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:14:15,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430654718] [2023-11-12 02:14:15,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:15,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:14:15,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:15,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:14:15,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:14:15,103 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:15,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:15,150 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2023-11-12 02:14:15,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:14:15,151 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-12 02:14:15,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:15,151 INFO L225 Difference]: With dead ends: 34 [2023-11-12 02:14:15,151 INFO L226 Difference]: Without dead ends: 34 [2023-11-12 02:14:15,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:14:15,153 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:15,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 28 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:14:15,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-12 02:14:15,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2023-11-12 02:14:15,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:15,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-11-12 02:14:15,156 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 12 [2023-11-12 02:14:15,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:15,156 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-11-12 02:14:15,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:15,157 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-11-12 02:14:15,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 02:14:15,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:15,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:15,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 02:14:15,158 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:15,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:15,159 INFO L85 PathProgramCache]: Analyzing trace with hash -2044973646, now seen corresponding path program 1 times [2023-11-12 02:14:15,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:15,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868120783] [2023-11-12 02:14:15,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:15,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:15,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:15,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868120783] [2023-11-12 02:14:15,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868120783] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:15,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:15,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:14:15,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145133507] [2023-11-12 02:14:15,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:15,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:14:15,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:15,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:14:15,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:14:15,209 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:15,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:15,237 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-11-12 02:14:15,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:14:15,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-12 02:14:15,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:15,238 INFO L225 Difference]: With dead ends: 31 [2023-11-12 02:14:15,239 INFO L226 Difference]: Without dead ends: 31 [2023-11-12 02:14:15,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:14:15,240 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:15,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 30 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:14:15,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-12 02:14:15,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-12 02:14:15,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:15,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-11-12 02:14:15,243 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 14 [2023-11-12 02:14:15,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:15,243 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-11-12 02:14:15,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:15,244 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-11-12 02:14:15,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 02:14:15,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:15,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:15,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 02:14:15,245 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:15,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:15,246 INFO L85 PathProgramCache]: Analyzing trace with hash -2044973645, now seen corresponding path program 1 times [2023-11-12 02:14:15,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:15,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544811856] [2023-11-12 02:14:15,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:15,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:15,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:15,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:15,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544811856] [2023-11-12 02:14:15,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544811856] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:15,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003197598] [2023-11-12 02:14:15,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:15,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:15,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:15,377 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:15,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:14:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:15,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 02:14:15,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:15,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:15,591 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-12 02:14:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:15,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003197598] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:15,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:15,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-11-12 02:14:15,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252152319] [2023-11-12 02:14:15,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:15,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:14:15,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:15,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:14:15,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:14:15,610 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:15,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:15,710 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2023-11-12 02:14:15,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:14:15,710 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-12 02:14:15,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:15,711 INFO L225 Difference]: With dead ends: 42 [2023-11-12 02:14:15,711 INFO L226 Difference]: Without dead ends: 42 [2023-11-12 02:14:15,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:14:15,713 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:15,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 73 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:14:15,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-12 02:14:15,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2023-11-12 02:14:15,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:15,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-11-12 02:14:15,721 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 14 [2023-11-12 02:14:15,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:15,723 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-11-12 02:14:15,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:15,723 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-11-12 02:14:15,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 02:14:15,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:15,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:15,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:15,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:14:15,934 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:15,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:15,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1030326432, now seen corresponding path program 1 times [2023-11-12 02:14:15,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:15,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686900790] [2023-11-12 02:14:15,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:15,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:16,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:16,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686900790] [2023-11-12 02:14:16,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686900790] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:16,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:16,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:14:16,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499177609] [2023-11-12 02:14:16,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:16,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:14:16,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:16,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:14:16,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:14:16,051 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:16,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:16,079 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-11-12 02:14:16,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:14:16,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-12 02:14:16,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:16,080 INFO L225 Difference]: With dead ends: 31 [2023-11-12 02:14:16,080 INFO L226 Difference]: Without dead ends: 31 [2023-11-12 02:14:16,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:14:16,081 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:16,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 29 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:14:16,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-12 02:14:16,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-12 02:14:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 28 states have (on average 1.25) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:16,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-11-12 02:14:16,085 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 15 [2023-11-12 02:14:16,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:16,086 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-11-12 02:14:16,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:16,086 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-11-12 02:14:16,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 02:14:16,090 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:16,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:16,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 02:14:16,091 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:16,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:16,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1030326433, now seen corresponding path program 1 times [2023-11-12 02:14:16,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:16,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548926881] [2023-11-12 02:14:16,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:16,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:14:16,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:16,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548926881] [2023-11-12 02:14:16,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548926881] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:16,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:16,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:14:16,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983950527] [2023-11-12 02:14:16,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:16,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:14:16,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:16,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:14:16,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:14:16,325 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:16,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:16,401 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2023-11-12 02:14:16,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:14:16,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-12 02:14:16,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:16,402 INFO L225 Difference]: With dead ends: 56 [2023-11-12 02:14:16,402 INFO L226 Difference]: Without dead ends: 56 [2023-11-12 02:14:16,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:14:16,403 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:16,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 69 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:14:16,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-12 02:14:16,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2023-11-12 02:14:16,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:16,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2023-11-12 02:14:16,407 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 15 [2023-11-12 02:14:16,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:16,407 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2023-11-12 02:14:16,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:16,407 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2023-11-12 02:14:16,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 02:14:16,408 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:16,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:16,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-12 02:14:16,409 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:16,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:16,409 INFO L85 PathProgramCache]: Analyzing trace with hash 443520419, now seen corresponding path program 1 times [2023-11-12 02:14:16,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:16,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212161820] [2023-11-12 02:14:16,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:16,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:14:16,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:16,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212161820] [2023-11-12 02:14:16,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212161820] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:16,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:16,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:14:16,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163022075] [2023-11-12 02:14:16,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:16,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:14:16,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:16,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:14:16,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:14:16,618 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:16,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:16,680 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2023-11-12 02:14:16,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:14:16,680 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-12 02:14:16,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:16,681 INFO L225 Difference]: With dead ends: 47 [2023-11-12 02:14:16,681 INFO L226 Difference]: Without dead ends: 47 [2023-11-12 02:14:16,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:14:16,682 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 76 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:16,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 29 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:14:16,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-12 02:14:16,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2023-11-12 02:14:16,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:16,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-11-12 02:14:16,685 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 15 [2023-11-12 02:14:16,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:16,685 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-11-12 02:14:16,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:16,686 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-11-12 02:14:16,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 02:14:16,686 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:16,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:16,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-12 02:14:16,687 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:16,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:16,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1676503922, now seen corresponding path program 1 times [2023-11-12 02:14:16,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:16,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784131924] [2023-11-12 02:14:16,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:16,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:16,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:14:16,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:16,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784131924] [2023-11-12 02:14:16,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784131924] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:16,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:16,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:14:16,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539500597] [2023-11-12 02:14:16,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:16,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:14:16,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:16,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:14:16,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:14:16,882 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:16,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:16,957 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2023-11-12 02:14:16,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:14:16,958 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2023-11-12 02:14:16,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:16,958 INFO L225 Difference]: With dead ends: 48 [2023-11-12 02:14:16,959 INFO L226 Difference]: Without dead ends: 48 [2023-11-12 02:14:16,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:14:16,960 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:16,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 78 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:14:16,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-12 02:14:16,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2023-11-12 02:14:16,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.170731707317073) internal successors, (48), 43 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) [2023-11-12 02:14:16,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2023-11-12 02:14:16,963 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 18 [2023-11-12 02:14:16,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:16,963 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2023-11-12 02:14:16,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:16,963 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2023-11-12 02:14:16,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 02:14:16,964 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:16,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:16,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-12 02:14:16,965 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:16,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:16,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1338599696, now seen corresponding path program 1 times [2023-11-12 02:14:16,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:16,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069393252] [2023-11-12 02:14:16,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:16,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:17,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:17,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069393252] [2023-11-12 02:14:17,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069393252] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:17,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482915107] [2023-11-12 02:14:17,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:17,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:17,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:17,212 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:17,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:14:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:17,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 02:14:17,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:17,360 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:14:17,429 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:14:17,432 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:17,432 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2023-11-12 02:14:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:14:17,438 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:17,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482915107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:17,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:14:17,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 12 [2023-11-12 02:14:17,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390372603] [2023-11-12 02:14:17,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:17,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:14:17,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:17,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:14:17,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:14:17,440 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:17,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:17,586 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2023-11-12 02:14:17,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:14:17,586 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2023-11-12 02:14:17,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:17,587 INFO L225 Difference]: With dead ends: 66 [2023-11-12 02:14:17,587 INFO L226 Difference]: Without dead ends: 66 [2023-11-12 02:14:17,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:14:17,588 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:17,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 97 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:14:17,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-12 02:14:17,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 38. [2023-11-12 02:14:17,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:17,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-11-12 02:14:17,591 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 18 [2023-11-12 02:14:17,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:17,591 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-11-12 02:14:17,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:17,592 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-11-12 02:14:17,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 02:14:17,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:17,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:17,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:17,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-12 02:14:17,798 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:17,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:17,798 INFO L85 PathProgramCache]: Analyzing trace with hash 317531342, now seen corresponding path program 1 times [2023-11-12 02:14:17,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:17,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786719232] [2023-11-12 02:14:17,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:17,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:18,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:18,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786719232] [2023-11-12 02:14:18,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786719232] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:18,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251529514] [2023-11-12 02:14:18,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:18,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:18,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:18,067 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:18,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:14:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:18,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 02:14:18,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:18,251 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:14:18,315 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:14:18,318 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:18,318 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2023-11-12 02:14:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:18,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:18,405 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-11-12 02:14:18,411 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-12 02:14:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:18,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251529514] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:18,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:18,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-11-12 02:14:18,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171504327] [2023-11-12 02:14:18,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:18,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:14:18,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:18,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:14:18,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:14:18,642 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:18,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:18,953 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2023-11-12 02:14:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:14:18,954 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-12 02:14:18,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:18,955 INFO L225 Difference]: With dead ends: 55 [2023-11-12 02:14:18,955 INFO L226 Difference]: Without dead ends: 55 [2023-11-12 02:14:18,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2023-11-12 02:14:18,956 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 67 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:18,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 148 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:14:18,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-12 02:14:18,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2023-11-12 02:14:18,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 39 states have (on average 1.205128205128205) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:18,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2023-11-12 02:14:18,959 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 18 [2023-11-12 02:14:18,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:18,959 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2023-11-12 02:14:18,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:18,960 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2023-11-12 02:14:18,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-12 02:14:18,960 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:18,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:18,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:19,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:19,161 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:19,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:19,162 INFO L85 PathProgramCache]: Analyzing trace with hash -432069207, now seen corresponding path program 1 times [2023-11-12 02:14:19,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:19,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453003467] [2023-11-12 02:14:19,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:19,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:14:19,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:19,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453003467] [2023-11-12 02:14:19,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453003467] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:19,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:19,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:14:19,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080439958] [2023-11-12 02:14:19,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:19,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:14:19,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:19,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:14:19,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:14:19,368 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:19,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:19,387 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2023-11-12 02:14:19,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:14:19,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-12 02:14:19,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:19,389 INFO L225 Difference]: With dead ends: 41 [2023-11-12 02:14:19,390 INFO L226 Difference]: Without dead ends: 25 [2023-11-12 02:14:19,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:14:19,391 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:19,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:14:19,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-12 02:14:19,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-12 02:14:19,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:19,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-11-12 02:14:19,398 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2023-11-12 02:14:19,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:19,399 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-11-12 02:14:19,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:19,399 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-11-12 02:14:19,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-12 02:14:19,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:19,402 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:19,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-12 02:14:19,402 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:19,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:19,403 INFO L85 PathProgramCache]: Analyzing trace with hash 329925547, now seen corresponding path program 2 times [2023-11-12 02:14:19,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:19,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685866986] [2023-11-12 02:14:19,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:19,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:19,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:19,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:19,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685866986] [2023-11-12 02:14:19,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685866986] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:19,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062658926] [2023-11-12 02:14:19,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:14:19,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:19,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:19,711 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:19,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:14:19,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:14:19,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:14:19,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-12 02:14:19,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:19,822 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:14:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:19,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:20,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062658926] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:20,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:20,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2023-11-12 02:14:20,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970135179] [2023-11-12 02:14:20,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:20,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 02:14:20,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:20,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 02:14:20,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:14:20,178 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:20,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:20,505 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2023-11-12 02:14:20,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:14:20,506 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 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 22 [2023-11-12 02:14:20,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:20,506 INFO L225 Difference]: With dead ends: 33 [2023-11-12 02:14:20,506 INFO L226 Difference]: Without dead ends: 33 [2023-11-12 02:14:20,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2023-11-12 02:14:20,507 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 62 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:20,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 84 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:14:20,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-12 02:14:20,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2023-11-12 02:14:20,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:20,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2023-11-12 02:14:20,509 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 22 [2023-11-12 02:14:20,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:20,509 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2023-11-12 02:14:20,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:20,510 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2023-11-12 02:14:20,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-12 02:14:20,510 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:20,510 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:20,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:20,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:20,716 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:20,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:20,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1637757353, now seen corresponding path program 1 times [2023-11-12 02:14:20,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:20,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661578587] [2023-11-12 02:14:20,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:20,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:21,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:21,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661578587] [2023-11-12 02:14:21,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661578587] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:21,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784340339] [2023-11-12 02:14:21,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:21,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:21,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:21,114 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:21,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:14:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:21,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-12 02:14:21,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:21,274 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 02:14:21,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:14:21,281 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-12 02:14:21,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:21,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:21,794 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:14:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:21,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784340339] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:21,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:21,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-12 02:14:21,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949621904] [2023-11-12 02:14:21,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:21,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-12 02:14:21,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:21,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-12 02:14:21,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2023-11-12 02:14:21,873 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 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) [2023-11-12 02:14:22,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:22,252 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2023-11-12 02:14:22,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:14:22,253 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 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 23 [2023-11-12 02:14:22,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:22,253 INFO L225 Difference]: With dead ends: 31 [2023-11-12 02:14:22,253 INFO L226 Difference]: Without dead ends: 31 [2023-11-12 02:14:22,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2023-11-12 02:14:22,254 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 111 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:22,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 76 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:14:22,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-12 02:14:22,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-11-12 02:14:22,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:22,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-11-12 02:14:22,256 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 23 [2023-11-12 02:14:22,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:22,256 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-11-12 02:14:22,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 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) [2023-11-12 02:14:22,257 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-11-12 02:14:22,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-12 02:14:22,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:22,257 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:22,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:22,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:22,464 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:22,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:22,464 INFO L85 PathProgramCache]: Analyzing trace with hash -399184250, now seen corresponding path program 3 times [2023-11-12 02:14:22,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:22,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818764818] [2023-11-12 02:14:22,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:22,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:23,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:23,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818764818] [2023-11-12 02:14:23,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818764818] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:23,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121437621] [2023-11-12 02:14:23,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:14:23,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:23,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:23,014 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:23,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:14:23,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:14:23,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:14:23,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-12 02:14:23,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:23,169 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-12 02:14:23,347 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-12 02:14:23,508 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2023-11-12 02:14:23,660 INFO L322 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-11-12 02:14:23,664 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2023-11-12 02:14:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:23,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:24,014 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:24,015 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2023-11-12 02:14:24,020 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2023-11-12 02:14:24,026 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2023-11-12 02:14:24,331 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-12 02:14:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:24,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121437621] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:24,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:24,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 33 [2023-11-12 02:14:24,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944666973] [2023-11-12 02:14:24,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:24,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-12 02:14:24,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:24,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-12 02:14:24,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=910, Unknown=10, NotChecked=0, Total=1056 [2023-11-12 02:14:24,352 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:25,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:25,103 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2023-11-12 02:14:25,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:14:25,104 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-12 02:14:25,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:25,104 INFO L225 Difference]: With dead ends: 46 [2023-11-12 02:14:25,105 INFO L226 Difference]: Without dead ends: 36 [2023-11-12 02:14:25,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=362, Invalid=1698, Unknown=10, NotChecked=0, Total=2070 [2023-11-12 02:14:25,106 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 60 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:25,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 136 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:14:25,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-12 02:14:25,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2023-11-12 02:14:25,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:25,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-11-12 02:14:25,108 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 26 [2023-11-12 02:14:25,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:25,108 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-11-12 02:14:25,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:25,109 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-11-12 02:14:25,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-12 02:14:25,109 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:25,109 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:25,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:25,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:25,317 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:25,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:25,318 INFO L85 PathProgramCache]: Analyzing trace with hash -536354717, now seen corresponding path program 4 times [2023-11-12 02:14:25,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:25,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904262727] [2023-11-12 02:14:25,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:25,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:25,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:25,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904262727] [2023-11-12 02:14:25,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904262727] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:25,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782849026] [2023-11-12 02:14:25,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:14:25,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:25,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:25,691 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:25,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:14:25,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:14:25,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:14:25,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-12 02:14:25,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:25,904 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-12 02:14:26,146 INFO L322 Elim1Store]: treesize reduction 47, result has 47.2 percent of original size [2023-11-12 02:14:26,146 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 55 [2023-11-12 02:14:26,921 INFO L322 Elim1Store]: treesize reduction 4, result has 96.5 percent of original size [2023-11-12 02:14:26,922 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 103 treesize of output 176 [2023-11-12 02:14:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 02:14:29,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:32,400 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 219 treesize of output 205 [2023-11-12 02:14:32,412 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2023-11-12 02:14:32,831 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-12 02:14:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 02:14:32,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782849026] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:32,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:32,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 15] total 34 [2023-11-12 02:14:32,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012591459] [2023-11-12 02:14:32,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:32,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-12 02:14:32,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:32,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-12 02:14:32,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1047, Unknown=1, NotChecked=0, Total=1190 [2023-11-12 02:14:32,868 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 35 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) [2023-11-12 02:14:35,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:35,456 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2023-11-12 02:14:35,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-12 02:14:35,456 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 35 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 30 [2023-11-12 02:14:35,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:35,457 INFO L225 Difference]: With dead ends: 46 [2023-11-12 02:14:35,457 INFO L226 Difference]: Without dead ends: 46 [2023-11-12 02:14:35,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=547, Invalid=2874, Unknown=1, NotChecked=0, Total=3422 [2023-11-12 02:14:35,459 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 127 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:35,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 130 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 02:14:35,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-12 02:14:35,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2023-11-12 02:14:35,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:35,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2023-11-12 02:14:35,462 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 30 [2023-11-12 02:14:35,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:35,462 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2023-11-12 02:14:35,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 35 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) [2023-11-12 02:14:35,462 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2023-11-12 02:14:35,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-12 02:14:35,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:35,463 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:35,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:35,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:35,663 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:35,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:35,664 INFO L85 PathProgramCache]: Analyzing trace with hash 552872945, now seen corresponding path program 2 times [2023-11-12 02:14:35,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:35,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616499236] [2023-11-12 02:14:35,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:35,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:36,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:36,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616499236] [2023-11-12 02:14:36,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616499236] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:36,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810400989] [2023-11-12 02:14:36,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:14:36,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:36,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:36,170 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:36,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:14:36,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:14:36,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:14:36,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-12 02:14:36,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:36,428 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 02:14:36,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:14:36,434 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-12 02:14:36,835 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:36,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:37,293 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:14:37,359 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:37,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810400989] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:37,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:37,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-11-12 02:14:37,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566751141] [2023-11-12 02:14:37,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:37,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-12 02:14:37,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:37,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-12 02:14:37,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2023-11-12 02:14:37,362 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 29 states, 28 states have (on average 3.25) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:37,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:37,850 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2023-11-12 02:14:37,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:14:37,851 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.25) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 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 31 [2023-11-12 02:14:37,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:37,852 INFO L225 Difference]: With dead ends: 40 [2023-11-12 02:14:37,852 INFO L226 Difference]: Without dead ends: 40 [2023-11-12 02:14:37,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2023-11-12 02:14:37,855 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 184 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:37,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 96 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:14:37,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-12 02:14:37,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-12 02:14:37,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:37,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2023-11-12 02:14:37,859 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 31 [2023-11-12 02:14:37,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:37,859 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2023-11-12 02:14:37,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.25) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:37,859 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2023-11-12 02:14:37,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-12 02:14:37,860 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:37,861 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:37,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:38,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:38,067 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:38,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:38,067 INFO L85 PathProgramCache]: Analyzing trace with hash -232228746, now seen corresponding path program 3 times [2023-11-12 02:14:38,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:38,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413398105] [2023-11-12 02:14:38,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:38,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:38,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:38,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413398105] [2023-11-12 02:14:38,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413398105] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:38,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963763209] [2023-11-12 02:14:38,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:14:38,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:38,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:38,617 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:38,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:14:38,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-12 02:14:38,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:14:38,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-12 02:14:38,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:38,890 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-12 02:14:39,147 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-12 02:14:39,229 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-12 02:14:39,284 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-12 02:14:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:39,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:39,416 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_391 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_391) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2023-11-12 02:14:39,519 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_391 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_391) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2023-11-12 02:14:39,528 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:39,529 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-11-12 02:14:39,538 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:39,538 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2023-11-12 02:14:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-11-12 02:14:39,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963763209] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:39,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:39,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 30 [2023-11-12 02:14:39,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563984591] [2023-11-12 02:14:39,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:39,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-12 02:14:39,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:39,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-12 02:14:39,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=679, Unknown=12, NotChecked=106, Total=870 [2023-11-12 02:14:39,712 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 30 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:40,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:40,646 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2023-11-12 02:14:40,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 02:14:40,646 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 30 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-12 02:14:40,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:40,647 INFO L225 Difference]: With dead ends: 61 [2023-11-12 02:14:40,647 INFO L226 Difference]: Without dead ends: 47 [2023-11-12 02:14:40,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=213, Invalid=1588, Unknown=13, NotChecked=166, Total=1980 [2023-11-12 02:14:40,648 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:40,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 206 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 415 Invalid, 0 Unknown, 76 Unchecked, 0.3s Time] [2023-11-12 02:14:40,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-12 02:14:40,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2023-11-12 02:14:40,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:40,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2023-11-12 02:14:40,651 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 35 [2023-11-12 02:14:40,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:40,652 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2023-11-12 02:14:40,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 30 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:40,652 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2023-11-12 02:14:40,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-12 02:14:40,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:40,653 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:40,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-12 02:14:40,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-12 02:14:40,859 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:40,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:40,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1384427719, now seen corresponding path program 4 times [2023-11-12 02:14:40,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:40,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150691950] [2023-11-12 02:14:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:40,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:41,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:41,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150691950] [2023-11-12 02:14:41,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150691950] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:41,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378682097] [2023-11-12 02:14:41,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:14:41,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:41,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:41,513 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:41,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-12 02:14:41,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:14:41,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:14:41,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-12 02:14:41,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:41,714 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 02:14:41,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:14:41,720 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-12 02:14:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:43,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:44,138 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:14:44,222 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:44,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378682097] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:44,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:44,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 13] total 34 [2023-11-12 02:14:44,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303454368] [2023-11-12 02:14:44,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:44,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-12 02:14:44,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:44,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-12 02:14:44,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2023-11-12 02:14:44,225 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 35 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 35 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:46,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:46,007 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2023-11-12 02:14:46,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:14:46,007 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 35 states have internal predecessors, (115), 0 states have call successors, (0), 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 39 [2023-11-12 02:14:46,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:46,008 INFO L225 Difference]: With dead ends: 47 [2023-11-12 02:14:46,008 INFO L226 Difference]: Without dead ends: 47 [2023-11-12 02:14:46,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=352, Invalid=1810, Unknown=0, NotChecked=0, Total=2162 [2023-11-12 02:14:46,010 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:46,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 115 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:14:46,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-12 02:14:46,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2023-11-12 02:14:46,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:46,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2023-11-12 02:14:46,013 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 39 [2023-11-12 02:14:46,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:46,014 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2023-11-12 02:14:46,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 35 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:46,014 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2023-11-12 02:14:46,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-12 02:14:46,015 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:46,015 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:46,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:46,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:46,222 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:46,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:46,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1084761846, now seen corresponding path program 5 times [2023-11-12 02:14:46,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:46,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547102313] [2023-11-12 02:14:46,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:46,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:47,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:47,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547102313] [2023-11-12 02:14:47,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547102313] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:47,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175053301] [2023-11-12 02:14:47,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:14:47,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:47,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:47,087 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:47,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-12 02:14:47,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-12 02:14:47,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:14:47,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-12 02:14:47,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:47,301 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-12 02:14:47,551 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:14:47,583 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:14:47,651 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:14:47,719 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:14:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:47,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:47,831 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_484 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_484) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2023-11-12 02:14:47,842 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_484 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_484) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2023-11-12 02:14:47,928 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_484 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_484) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2023-11-12 02:14:47,936 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:47,937 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-11-12 02:14:47,945 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:47,945 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2023-11-12 02:14:47,949 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-12 02:14:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 15 not checked. [2023-11-12 02:14:48,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175053301] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:48,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:48,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 34 [2023-11-12 02:14:48,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987629767] [2023-11-12 02:14:48,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:48,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-12 02:14:48,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:48,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-12 02:14:48,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=832, Unknown=9, NotChecked=180, Total=1122 [2023-11-12 02:14:48,293 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 34 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:49,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:49,124 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2023-11-12 02:14:49,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-12 02:14:49,125 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 34 states have internal predecessors, (91), 0 states have call successors, (0), 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 [2023-11-12 02:14:49,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:49,126 INFO L225 Difference]: With dead ends: 70 [2023-11-12 02:14:49,126 INFO L226 Difference]: Without dead ends: 52 [2023-11-12 02:14:49,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=204, Invalid=1521, Unknown=9, NotChecked=246, Total=1980 [2023-11-12 02:14:49,127 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:49,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 291 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 549 Invalid, 0 Unknown, 136 Unchecked, 0.4s Time] [2023-11-12 02:14:49,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-12 02:14:49,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2023-11-12 02:14:49,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:49,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2023-11-12 02:14:49,129 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 42 [2023-11-12 02:14:49,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:49,130 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2023-11-12 02:14:49,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 34 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:49,130 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2023-11-12 02:14:49,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-12 02:14:49,130 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:49,131 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:49,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:49,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-12 02:14:49,337 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:49,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:49,338 INFO L85 PathProgramCache]: Analyzing trace with hash -518144301, now seen corresponding path program 6 times [2023-11-12 02:14:49,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:49,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031771182] [2023-11-12 02:14:49,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:49,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:49,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:49,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031771182] [2023-11-12 02:14:49,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031771182] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:49,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352225449] [2023-11-12 02:14:49,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:14:49,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:49,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:49,844 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:49,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-12 02:14:50,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-12 02:14:50,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:14:50,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-12 02:14:50,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:50,033 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 02:14:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 32 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:50,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 32 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:51,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352225449] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:51,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:51,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 36 [2023-11-12 02:14:51,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897017652] [2023-11-12 02:14:51,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:51,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-12 02:14:51,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:51,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-12 02:14:51,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2023-11-12 02:14:51,031 INFO L87 Difference]: Start difference. First operand 49 states and 50 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) [2023-11-12 02:14:51,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:51,626 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2023-11-12 02:14:51,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:14:51,627 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 46 [2023-11-12 02:14:51,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:51,627 INFO L225 Difference]: With dead ends: 57 [2023-11-12 02:14:51,627 INFO L226 Difference]: Without dead ends: 57 [2023-11-12 02:14:51,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=308, Invalid=1584, Unknown=0, NotChecked=0, Total=1892 [2023-11-12 02:14:51,629 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 79 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:51,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 174 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:14:51,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-12 02:14:51,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2023-11-12 02:14:51,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:51,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2023-11-12 02:14:51,631 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 46 [2023-11-12 02:14:51,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:51,631 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2023-11-12 02:14:51,632 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) [2023-11-12 02:14:51,632 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2023-11-12 02:14:51,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-12 02:14:51,632 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:51,632 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:51,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:51,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c325dd88-51d9-4a09-b5ea-9f0307d67b5a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-12 02:14:51,833 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:14:51,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:51,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1117395841, now seen corresponding path program 5 times [2023-11-12 02:14:51,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:51,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675544853] [2023-11-12 02:14:51,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:51,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat