./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/lockfree-3.0.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.0.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ce7b97696e85da66033a1f3711f1d24681434c76600ae3cd891d7ea07b7fcbea --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:09:27,564 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:09:27,682 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 23:09:27,689 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:09:27,690 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:09:27,726 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:09:27,727 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:09:27,728 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:09:27,729 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:09:27,734 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:09:27,735 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:09:27,736 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:09:27,736 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:09:27,738 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:09:27,739 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:09:27,739 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:09:27,740 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:09:27,740 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:09:27,741 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 23:09:27,741 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 23:09:27,742 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 23:09:27,742 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:09:27,743 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 23:09:27,743 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 23:09:27,744 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:09:27,744 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:09:27,745 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:09:27,746 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:09:27,746 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:09:27,747 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:09:27,748 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:09:27,748 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:09:27,749 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:09:27,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:09:27,749 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:09:27,750 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:09:27,750 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:09:27,750 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:09:27,750 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_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce7b97696e85da66033a1f3711f1d24681434c76600ae3cd891d7ea07b7fcbea [2023-11-06 23:09:28,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:09:28,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:09:28,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:09:28,102 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:09:28,103 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:09:28,105 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/memsafety/lockfree-3.0.i [2023-11-06 23:09:31,201 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:09:31,565 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:09:31,566 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/sv-benchmarks/c/memsafety/lockfree-3.0.i [2023-11-06 23:09:31,581 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/data/7af4522d3/2dc9f14fd6b7424cafcf423963989247/FLAG50726a229 [2023-11-06 23:09:31,600 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/data/7af4522d3/2dc9f14fd6b7424cafcf423963989247 [2023-11-06 23:09:31,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:09:31,613 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:09:31,617 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:09:31,617 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:09:31,623 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:09:31,623 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:09:31" (1/1) ... [2023-11-06 23:09:31,625 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a9c580c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:31, skipping insertion in model container [2023-11-06 23:09:31,625 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:09:31" (1/1) ... [2023-11-06 23:09:31,695 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:09:32,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:09:32,133 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:09:32,204 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:09:32,247 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:09:32,247 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:32 WrapperNode [2023-11-06 23:09:32,248 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:09:32,249 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:09:32,249 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:09:32,249 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:09:32,257 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:32" (1/1) ... [2023-11-06 23:09:32,283 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:32" (1/1) ... [2023-11-06 23:09:32,317 INFO L138 Inliner]: procedures = 125, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 122 [2023-11-06 23:09:32,318 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:09:32,319 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:09:32,319 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:09:32,319 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:09:32,329 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:32" (1/1) ... [2023-11-06 23:09:32,329 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:32" (1/1) ... [2023-11-06 23:09:32,333 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:32" (1/1) ... [2023-11-06 23:09:32,333 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:32" (1/1) ... [2023-11-06 23:09:32,340 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:32" (1/1) ... [2023-11-06 23:09:32,344 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:32" (1/1) ... [2023-11-06 23:09:32,346 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:32" (1/1) ... [2023-11-06 23:09:32,347 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:32" (1/1) ... [2023-11-06 23:09:32,350 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:09:32,351 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:09:32,352 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:09:32,352 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:09:32,353 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:32" (1/1) ... [2023-11-06 23:09:32,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:09:32,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:32,406 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:09:32,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:09:32,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:09:32,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:09:32,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 23:09:32,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:09:32,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 23:09:32,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 23:09:32,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:09:32,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:09:32,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:09:32,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:09:32,568 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:09:32,570 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:09:32,896 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:09:32,902 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:09:32,903 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 23:09:32,905 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:09:32 BoogieIcfgContainer [2023-11-06 23:09:32,905 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:09:32,908 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:09:32,908 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:09:32,911 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:09:32,912 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:09:31" (1/3) ... [2023-11-06 23:09:32,912 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348f65bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:09:32, skipping insertion in model container [2023-11-06 23:09:32,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:32" (2/3) ... [2023-11-06 23:09:32,915 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348f65bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:09:32, skipping insertion in model container [2023-11-06 23:09:32,916 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:09:32" (3/3) ... [2023-11-06 23:09:32,917 INFO L112 eAbstractionObserver]: Analyzing ICFG lockfree-3.0.i [2023-11-06 23:09:32,937 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:09:32,938 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-11-06 23:09:32,983 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:09:32,990 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;@576395b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:09:32,990 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-06 23:09:32,995 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 43 states have (on average 1.930232558139535) internal successors, (83), 63 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:33,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 23:09:33,001 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:33,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:09:33,002 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:33,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:33,008 INFO L85 PathProgramCache]: Analyzing trace with hash 28819106, now seen corresponding path program 1 times [2023-11-06 23:09:33,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:33,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538466070] [2023-11-06 23:09:33,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:33,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:33,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:33,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:33,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538466070] [2023-11-06 23:09:33,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538466070] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:33,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:33,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:09:33,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693763742] [2023-11-06 23:09:33,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:33,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:09:33,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:33,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:09:33,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:09:33,225 INFO L87 Difference]: Start difference. First operand has 64 states, 43 states have (on average 1.930232558139535) internal successors, (83), 63 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:33,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:33,243 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2023-11-06 23:09:33,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:09:33,246 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2023-11-06 23:09:33,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:33,255 INFO L225 Difference]: With dead ends: 64 [2023-11-06 23:09:33,255 INFO L226 Difference]: Without dead ends: 62 [2023-11-06 23:09:33,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:09:33,261 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:33,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:09:33,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-06 23:09:33,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-06 23:09:33,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.880952380952381) internal successors, (79), 61 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:33,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2023-11-06 23:09:33,300 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 5 [2023-11-06 23:09:33,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:33,301 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2023-11-06 23:09:33,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:33,301 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2023-11-06 23:09:33,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 23:09:33,302 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:33,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:33,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:09:33,303 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:33,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:33,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1806851052, now seen corresponding path program 1 times [2023-11-06 23:09:33,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:33,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883714283] [2023-11-06 23:09:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:33,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:33,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:33,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:33,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883714283] [2023-11-06 23:09:33,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883714283] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:33,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:33,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:33,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666909698] [2023-11-06 23:09:33,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:33,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:33,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:33,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:33,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:33,361 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:33,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:33,380 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2023-11-06 23:09:33,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:33,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-06 23:09:33,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:33,382 INFO L225 Difference]: With dead ends: 63 [2023-11-06 23:09:33,382 INFO L226 Difference]: Without dead ends: 63 [2023-11-06 23:09:33,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:33,384 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 0 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:33,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 151 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:09:33,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-06 23:09:33,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-11-06 23:09:33,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.8604651162790697) internal successors, (80), 62 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:33,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2023-11-06 23:09:33,394 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 7 [2023-11-06 23:09:33,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:33,394 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2023-11-06 23:09:33,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:33,395 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2023-11-06 23:09:33,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 23:09:33,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:33,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:33,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:09:33,396 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:33,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:33,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1806910634, now seen corresponding path program 1 times [2023-11-06 23:09:33,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:33,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180723278] [2023-11-06 23:09:33,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:33,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:33,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:33,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180723278] [2023-11-06 23:09:33,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180723278] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:33,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:33,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:09:33,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385634920] [2023-11-06 23:09:33,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:33,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:33,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:33,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:33,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:33,470 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:33,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:33,506 INFO L93 Difference]: Finished difference Result 111 states and 145 transitions. [2023-11-06 23:09:33,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:33,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-06 23:09:33,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:33,509 INFO L225 Difference]: With dead ends: 111 [2023-11-06 23:09:33,509 INFO L226 Difference]: Without dead ends: 111 [2023-11-06 23:09:33,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:33,511 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 62 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:33,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 138 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:09:33,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-06 23:09:33,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 93. [2023-11-06 23:09:33,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 73 states have (on average 1.8767123287671232) internal successors, (137), 92 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:33,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 137 transitions. [2023-11-06 23:09:33,539 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 137 transitions. Word has length 7 [2023-11-06 23:09:33,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:33,540 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 137 transitions. [2023-11-06 23:09:33,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:33,541 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 137 transitions. [2023-11-06 23:09:33,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 23:09:33,542 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:33,543 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:33,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:09:33,544 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:33,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:33,548 INFO L85 PathProgramCache]: Analyzing trace with hash 177749355, now seen corresponding path program 1 times [2023-11-06 23:09:33,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:33,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542706087] [2023-11-06 23:09:33,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:33,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:33,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:33,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542706087] [2023-11-06 23:09:33,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542706087] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:33,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:33,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:33,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273157668] [2023-11-06 23:09:33,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:33,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:09:33,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:33,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:09:33,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:09:33,696 INFO L87 Difference]: Start difference. First operand 93 states and 137 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:33,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:33,753 INFO L93 Difference]: Finished difference Result 101 states and 146 transitions. [2023-11-06 23:09:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:09:33,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-06 23:09:33,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:33,756 INFO L225 Difference]: With dead ends: 101 [2023-11-06 23:09:33,756 INFO L226 Difference]: Without dead ends: 101 [2023-11-06 23:09:33,756 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 [2023-11-06 23:09:33,758 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 7 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:33,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 211 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:09:33,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-06 23:09:33,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2023-11-06 23:09:33,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 75 states have (on average 1.8533333333333333) internal successors, (139), 94 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:33,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 139 transitions. [2023-11-06 23:09:33,769 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 139 transitions. Word has length 8 [2023-11-06 23:09:33,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:33,770 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 139 transitions. [2023-11-06 23:09:33,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:33,770 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 139 transitions. [2023-11-06 23:09:33,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 23:09:33,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:33,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:33,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 23:09:33,772 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:33,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:33,773 INFO L85 PathProgramCache]: Analyzing trace with hash 179653412, now seen corresponding path program 1 times [2023-11-06 23:09:33,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:33,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351687652] [2023-11-06 23:09:33,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:33,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:33,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:33,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351687652] [2023-11-06 23:09:33,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351687652] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:33,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:33,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:09:33,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918522696] [2023-11-06 23:09:33,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:33,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:33,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:33,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:33,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:33,866 INFO L87 Difference]: Start difference. First operand 95 states and 139 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:33,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:33,964 INFO L93 Difference]: Finished difference Result 177 states and 261 transitions. [2023-11-06 23:09:33,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:33,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-06 23:09:33,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:33,967 INFO L225 Difference]: With dead ends: 177 [2023-11-06 23:09:33,967 INFO L226 Difference]: Without dead ends: 174 [2023-11-06 23:09:33,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:33,969 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 63 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:33,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 121 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:09:33,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-06 23:09:33,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 153. [2023-11-06 23:09:33,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 133 states have (on average 1.849624060150376) internal successors, (246), 152 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:33,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 246 transitions. [2023-11-06 23:09:33,987 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 246 transitions. Word has length 8 [2023-11-06 23:09:33,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:33,988 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 246 transitions. [2023-11-06 23:09:33,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:33,988 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 246 transitions. [2023-11-06 23:09:33,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 23:09:33,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:33,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:33,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 23:09:33,990 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:33,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:33,991 INFO L85 PathProgramCache]: Analyzing trace with hash 179596397, now seen corresponding path program 1 times [2023-11-06 23:09:33,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:33,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491273918] [2023-11-06 23:09:33,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:33,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:34,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:34,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491273918] [2023-11-06 23:09:34,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491273918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:34,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:34,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:09:34,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933482552] [2023-11-06 23:09:34,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:34,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:34,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:34,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:34,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:34,089 INFO L87 Difference]: Start difference. First operand 153 states and 246 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:34,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:34,177 INFO L93 Difference]: Finished difference Result 231 states and 355 transitions. [2023-11-06 23:09:34,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:34,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-06 23:09:34,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:34,183 INFO L225 Difference]: With dead ends: 231 [2023-11-06 23:09:34,183 INFO L226 Difference]: Without dead ends: 231 [2023-11-06 23:09:34,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:34,193 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 69 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:34,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 172 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:09:34,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-11-06 23:09:34,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 208. [2023-11-06 23:09:34,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 190 states have (on average 1.7894736842105263) internal successors, (340), 207 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:34,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 340 transitions. [2023-11-06 23:09:34,222 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 340 transitions. Word has length 8 [2023-11-06 23:09:34,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:34,223 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 340 transitions. [2023-11-06 23:09:34,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:34,223 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 340 transitions. [2023-11-06 23:09:34,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 23:09:34,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:34,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:34,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 23:09:34,224 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:34,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:34,225 INFO L85 PathProgramCache]: Analyzing trace with hash 179596398, now seen corresponding path program 1 times [2023-11-06 23:09:34,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:34,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923455404] [2023-11-06 23:09:34,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:34,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:34,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:34,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923455404] [2023-11-06 23:09:34,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923455404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:34,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:34,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:09:34,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74527274] [2023-11-06 23:09:34,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:34,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:34,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:34,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:34,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:34,405 INFO L87 Difference]: Start difference. First operand 208 states and 340 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:34,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:34,468 INFO L93 Difference]: Finished difference Result 226 states and 346 transitions. [2023-11-06 23:09:34,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:34,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-06 23:09:34,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:34,470 INFO L225 Difference]: With dead ends: 226 [2023-11-06 23:09:34,471 INFO L226 Difference]: Without dead ends: 226 [2023-11-06 23:09:34,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:34,476 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 68 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:34,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 180 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:09:34,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-11-06 23:09:34,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 206. [2023-11-06 23:09:34,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 190 states have (on average 1.7473684210526317) internal successors, (332), 205 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:34,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 332 transitions. [2023-11-06 23:09:34,503 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 332 transitions. Word has length 8 [2023-11-06 23:09:34,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:34,503 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 332 transitions. [2023-11-06 23:09:34,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:34,504 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 332 transitions. [2023-11-06 23:09:34,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 23:09:34,504 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:34,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:34,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 23:09:34,505 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:34,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:34,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1272529015, now seen corresponding path program 1 times [2023-11-06 23:09:34,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:34,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558308006] [2023-11-06 23:09:34,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:34,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:34,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:34,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558308006] [2023-11-06 23:09:34,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558308006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:34,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:34,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:34,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097795256] [2023-11-06 23:09:34,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:34,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:09:34,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:34,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:09:34,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:09:34,556 INFO L87 Difference]: Start difference. First operand 206 states and 332 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:34,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:34,593 INFO L93 Difference]: Finished difference Result 188 states and 273 transitions. [2023-11-06 23:09:34,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:09:34,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-06 23:09:34,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:34,596 INFO L225 Difference]: With dead ends: 188 [2023-11-06 23:09:34,596 INFO L226 Difference]: Without dead ends: 188 [2023-11-06 23:09:34,596 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 [2023-11-06 23:09:34,597 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 53 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:34,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 190 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:09:34,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-06 23:09:34,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 163. [2023-11-06 23:09:34,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 151 states have (on average 1.6821192052980132) internal successors, (254), 162 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:34,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 254 transitions. [2023-11-06 23:09:34,604 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 254 transitions. Word has length 9 [2023-11-06 23:09:34,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:34,604 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 254 transitions. [2023-11-06 23:09:34,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:34,605 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 254 transitions. [2023-11-06 23:09:34,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 23:09:34,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:34,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:34,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 23:09:34,606 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:34,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:34,607 INFO L85 PathProgramCache]: Analyzing trace with hash 845049582, now seen corresponding path program 1 times [2023-11-06 23:09:34,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:34,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87900448] [2023-11-06 23:09:34,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:34,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:34,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:34,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87900448] [2023-11-06 23:09:34,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87900448] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:34,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:34,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:34,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875557654] [2023-11-06 23:09:34,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:34,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:09:34,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:34,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:09:34,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:09:34,671 INFO L87 Difference]: Start difference. First operand 163 states and 254 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:34,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:34,722 INFO L93 Difference]: Finished difference Result 256 states and 378 transitions. [2023-11-06 23:09:34,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:09:34,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 23:09:34,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:34,728 INFO L225 Difference]: With dead ends: 256 [2023-11-06 23:09:34,728 INFO L226 Difference]: Without dead ends: 256 [2023-11-06 23:09:34,728 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 [2023-11-06 23:09:34,731 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 55 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:34,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 175 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:09:34,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-11-06 23:09:34,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 234. [2023-11-06 23:09:34,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 222 states have (on average 1.6036036036036037) internal successors, (356), 233 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:34,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 356 transitions. [2023-11-06 23:09:34,746 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 356 transitions. Word has length 10 [2023-11-06 23:09:34,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:34,746 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 356 transitions. [2023-11-06 23:09:34,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:34,747 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 356 transitions. [2023-11-06 23:09:34,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 23:09:34,749 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:34,749 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:34,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 23:09:34,750 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:34,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:34,751 INFO L85 PathProgramCache]: Analyzing trace with hash 22246394, now seen corresponding path program 1 times [2023-11-06 23:09:34,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:34,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358315549] [2023-11-06 23:09:34,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:34,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:34,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:34,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:34,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358315549] [2023-11-06 23:09:34,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358315549] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:34,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657446223] [2023-11-06 23:09:34,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:34,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:34,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:34,920 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:34,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:09:35,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:35,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:09:35,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:35,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:35,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:35,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657446223] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:35,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:35,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-11-06 23:09:35,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032910680] [2023-11-06 23:09:35,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:35,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:09:35,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:35,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:09:35,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:09:35,168 INFO L87 Difference]: Start difference. First operand 234 states and 356 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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) [2023-11-06 23:09:35,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:35,220 INFO L93 Difference]: Finished difference Result 238 states and 346 transitions. [2023-11-06 23:09:35,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:09:35,220 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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 16 [2023-11-06 23:09:35,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:35,223 INFO L225 Difference]: With dead ends: 238 [2023-11-06 23:09:35,223 INFO L226 Difference]: Without dead ends: 238 [2023-11-06 23:09:35,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:09:35,224 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 93 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:35,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 338 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:09:35,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-11-06 23:09:35,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 230. [2023-11-06 23:09:35,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 218 states have (on average 1.5779816513761469) internal successors, (344), 229 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:35,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 344 transitions. [2023-11-06 23:09:35,233 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 344 transitions. Word has length 16 [2023-11-06 23:09:35,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:35,234 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 344 transitions. [2023-11-06 23:09:35,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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) [2023-11-06 23:09:35,234 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 344 transitions. [2023-11-06 23:09:35,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 23:09:35,235 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:35,235 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:35,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 23:09:35,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:09:35,442 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:35,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:35,443 INFO L85 PathProgramCache]: Analyzing trace with hash 617603772, now seen corresponding path program 1 times [2023-11-06 23:09:35,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:35,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615790740] [2023-11-06 23:09:35,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:35,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:35,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:35,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615790740] [2023-11-06 23:09:35,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615790740] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:35,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950719126] [2023-11-06 23:09:35,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:35,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:35,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:35,564 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:35,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:09:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:35,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:09:35,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:35,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:35,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:35,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950719126] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:35,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:35,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-11-06 23:09:35,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431846800] [2023-11-06 23:09:35,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:35,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:09:35,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:35,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:09:35,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:09:35,752 INFO L87 Difference]: Start difference. First operand 230 states and 344 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:35,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:35,832 INFO L93 Difference]: Finished difference Result 379 states and 538 transitions. [2023-11-06 23:09:35,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:09:35,833 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 16 [2023-11-06 23:09:35,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:35,835 INFO L225 Difference]: With dead ends: 379 [2023-11-06 23:09:35,835 INFO L226 Difference]: Without dead ends: 379 [2023-11-06 23:09:35,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:09:35,836 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 86 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:35,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 429 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:09:35,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-11-06 23:09:35,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 323. [2023-11-06 23:09:35,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 311 states have (on average 1.5305466237942122) internal successors, (476), 322 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:35,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 476 transitions. [2023-11-06 23:09:35,846 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 476 transitions. Word has length 16 [2023-11-06 23:09:35,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:35,847 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 476 transitions. [2023-11-06 23:09:35,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:35,847 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 476 transitions. [2023-11-06 23:09:35,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 23:09:35,848 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:35,848 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:35,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:36,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 23:09:36,055 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:36,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:36,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1134377974, now seen corresponding path program 2 times [2023-11-06 23:09:36,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:36,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183733436] [2023-11-06 23:09:36,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:36,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:09:36,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:36,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183733436] [2023-11-06 23:09:36,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183733436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:36,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177573294] [2023-11-06 23:09:36,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:09:36,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:36,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:36,157 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:36,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:09:36,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:09:36,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:36,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:09:36,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:36,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:36,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177573294] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:36,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:36,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 8 [2023-11-06 23:09:36,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595533890] [2023-11-06 23:09:36,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:36,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:09:36,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:36,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:09:36,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:09:36,326 INFO L87 Difference]: Start difference. First operand 323 states and 476 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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) [2023-11-06 23:09:36,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:36,465 INFO L93 Difference]: Finished difference Result 379 states and 526 transitions. [2023-11-06 23:09:36,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 23:09:36,465 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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) Word has length 22 [2023-11-06 23:09:36,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:36,468 INFO L225 Difference]: With dead ends: 379 [2023-11-06 23:09:36,468 INFO L226 Difference]: Without dead ends: 379 [2023-11-06 23:09:36,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-11-06 23:09:36,469 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 297 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:36,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 376 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:09:36,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-11-06 23:09:36,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 323. [2023-11-06 23:09:36,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 311 states have (on average 1.4919614147909968) internal successors, (464), 322 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:36,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 464 transitions. [2023-11-06 23:09:36,479 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 464 transitions. Word has length 22 [2023-11-06 23:09:36,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:36,479 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 464 transitions. [2023-11-06 23:09:36,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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) [2023-11-06 23:09:36,479 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 464 transitions. [2023-11-06 23:09:36,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 23:09:36,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:36,481 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:36,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:36,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 23:09:36,698 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:36,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:36,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1692627395, now seen corresponding path program 1 times [2023-11-06 23:09:36,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:36,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4227347] [2023-11-06 23:09:36,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:36,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:36,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:36,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4227347] [2023-11-06 23:09:36,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4227347] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:36,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114038003] [2023-11-06 23:09:36,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:36,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:36,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:36,771 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:36,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:09:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:36,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:09:36,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:36,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:36,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:37,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114038003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:37,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:37,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-11-06 23:09:37,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694178183] [2023-11-06 23:09:37,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:37,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:09:37,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:37,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:09:37,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:09:37,009 INFO L87 Difference]: Start difference. First operand 323 states and 464 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:37,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:37,109 INFO L93 Difference]: Finished difference Result 936 states and 1334 transitions. [2023-11-06 23:09:37,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:09:37,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 24 [2023-11-06 23:09:37,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:37,117 INFO L225 Difference]: With dead ends: 936 [2023-11-06 23:09:37,117 INFO L226 Difference]: Without dead ends: 936 [2023-11-06 23:09:37,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:09:37,119 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 180 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:37,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 167 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:09:37,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2023-11-06 23:09:37,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 811. [2023-11-06 23:09:37,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 799 states have (on average 1.4793491864831039) internal successors, (1182), 810 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:37,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1182 transitions. [2023-11-06 23:09:37,141 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1182 transitions. Word has length 24 [2023-11-06 23:09:37,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:37,142 INFO L495 AbstractCegarLoop]: Abstraction has 811 states and 1182 transitions. [2023-11-06 23:09:37,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:37,143 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1182 transitions. [2023-11-06 23:09:37,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 23:09:37,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:37,144 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:37,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-06 23:09:37,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 23:09:37,350 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:37,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:37,351 INFO L85 PathProgramCache]: Analyzing trace with hash -6965384, now seen corresponding path program 1 times [2023-11-06 23:09:37,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:37,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933059199] [2023-11-06 23:09:37,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:37,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:37,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:37,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933059199] [2023-11-06 23:09:37,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933059199] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:37,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923196543] [2023-11-06 23:09:37,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:37,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:37,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:37,497 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:37,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:09:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:37,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:09:37,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:37,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:37,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:37,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923196543] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:37,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:37,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-06 23:09:37,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832490545] [2023-11-06 23:09:37,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:37,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:09:37,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:37,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:09:37,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:09:37,710 INFO L87 Difference]: Start difference. First operand 811 states and 1182 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:37,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:37,866 INFO L93 Difference]: Finished difference Result 2063 states and 2850 transitions. [2023-11-06 23:09:37,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 23:09:37,866 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 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 27 [2023-11-06 23:09:37,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:37,877 INFO L225 Difference]: With dead ends: 2063 [2023-11-06 23:09:37,877 INFO L226 Difference]: Without dead ends: 2063 [2023-11-06 23:09:37,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-11-06 23:09:37,879 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 291 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:37,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 412 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:09:37,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2023-11-06 23:09:37,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1879. [2023-11-06 23:09:37,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1867 states have (on average 1.432244242099625) internal successors, (2674), 1878 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:37,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 2674 transitions. [2023-11-06 23:09:37,924 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 2674 transitions. Word has length 27 [2023-11-06 23:09:37,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:37,924 INFO L495 AbstractCegarLoop]: Abstraction has 1879 states and 2674 transitions. [2023-11-06 23:09:37,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:37,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 2674 transitions. [2023-11-06 23:09:37,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 23:09:37,926 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:37,926 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:37,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:38,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:09:38,132 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:38,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:38,132 INFO L85 PathProgramCache]: Analyzing trace with hash 554127938, now seen corresponding path program 1 times [2023-11-06 23:09:38,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:38,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91863302] [2023-11-06 23:09:38,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:38,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:09:38,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:38,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91863302] [2023-11-06 23:09:38,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91863302] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:38,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614486017] [2023-11-06 23:09:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:38,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:38,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:38,224 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:38,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:09:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:38,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:09:38,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:09:38,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:09:38,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614486017] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:38,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:38,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-11-06 23:09:38,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443964888] [2023-11-06 23:09:38,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:38,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:09:38,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:38,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:09:38,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:09:38,370 INFO L87 Difference]: Start difference. First operand 1879 states and 2674 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:38,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:38,449 INFO L93 Difference]: Finished difference Result 955 states and 1306 transitions. [2023-11-06 23:09:38,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:09:38,450 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-06 23:09:38,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:38,456 INFO L225 Difference]: With dead ends: 955 [2023-11-06 23:09:38,456 INFO L226 Difference]: Without dead ends: 955 [2023-11-06 23:09:38,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:09:38,458 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 100 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:38,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 411 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:09:38,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2023-11-06 23:09:38,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 885. [2023-11-06 23:09:38,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 873 states have (on average 1.404352806414662) internal successors, (1226), 884 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1226 transitions. [2023-11-06 23:09:38,483 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1226 transitions. Word has length 27 [2023-11-06 23:09:38,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:38,484 INFO L495 AbstractCegarLoop]: Abstraction has 885 states and 1226 transitions. [2023-11-06 23:09:38,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:38,484 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1226 transitions. [2023-11-06 23:09:38,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-06 23:09:38,487 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:38,488 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:38,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:38,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 23:09:38,693 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:38,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:38,694 INFO L85 PathProgramCache]: Analyzing trace with hash 2001409998, now seen corresponding path program 1 times [2023-11-06 23:09:38,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:38,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480262043] [2023-11-06 23:09:38,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:38,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-06 23:09:38,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:38,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480262043] [2023-11-06 23:09:38,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480262043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:38,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465075860] [2023-11-06 23:09:38,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:38,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:38,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:38,973 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:38,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:09:39,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:39,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:09:39,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:39,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:39,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465075860] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:39,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:39,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 13 [2023-11-06 23:09:39,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193149666] [2023-11-06 23:09:39,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:39,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 23:09:39,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:39,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 23:09:39,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:09:39,342 INFO L87 Difference]: Start difference. First operand 885 states and 1226 transitions. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:39,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:39,691 INFO L93 Difference]: Finished difference Result 1671 states and 2233 transitions. [2023-11-06 23:09:39,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 23:09:39,691 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-11-06 23:09:39,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:39,700 INFO L225 Difference]: With dead ends: 1671 [2023-11-06 23:09:39,700 INFO L226 Difference]: Without dead ends: 1671 [2023-11-06 23:09:39,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2023-11-06 23:09:39,702 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 345 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:39,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 818 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:09:39,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2023-11-06 23:09:39,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 984. [2023-11-06 23:09:39,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 972 states have (on average 1.4207818930041152) internal successors, (1381), 983 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:39,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1381 transitions. [2023-11-06 23:09:39,732 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1381 transitions. Word has length 51 [2023-11-06 23:09:39,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:39,733 INFO L495 AbstractCegarLoop]: Abstraction has 984 states and 1381 transitions. [2023-11-06 23:09:39,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:39,733 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1381 transitions. [2023-11-06 23:09:39,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-06 23:09:39,735 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:39,735 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:39,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:39,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 23:09:39,941 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:39,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:39,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1426339750, now seen corresponding path program 1 times [2023-11-06 23:09:39,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:39,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497730658] [2023-11-06 23:09:39,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:39,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 65 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-06 23:09:40,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:40,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497730658] [2023-11-06 23:09:40,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497730658] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:40,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904522187] [2023-11-06 23:09:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:40,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:40,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:40,169 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:40,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:09:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:40,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:09:40,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 23:09:40,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:40,432 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 23:09:40,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904522187] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:40,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:09:40,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2023-11-06 23:09:40,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300747216] [2023-11-06 23:09:40,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:40,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:09:40,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:40,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:09:40,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:09:40,435 INFO L87 Difference]: Start difference. First operand 984 states and 1381 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:40,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:40,548 INFO L93 Difference]: Finished difference Result 1701 states and 2325 transitions. [2023-11-06 23:09:40,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:09:40,549 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-06 23:09:40,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:40,558 INFO L225 Difference]: With dead ends: 1701 [2023-11-06 23:09:40,558 INFO L226 Difference]: Without dead ends: 1701 [2023-11-06 23:09:40,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-11-06 23:09:40,559 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 106 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:40,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 256 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:09:40,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2023-11-06 23:09:40,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1632. [2023-11-06 23:09:40,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1620 states have (on average 1.3962962962962964) internal successors, (2262), 1631 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:40,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 2262 transitions. [2023-11-06 23:09:40,599 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 2262 transitions. Word has length 59 [2023-11-06 23:09:40,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:40,600 INFO L495 AbstractCegarLoop]: Abstraction has 1632 states and 2262 transitions. [2023-11-06 23:09:40,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:40,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 2262 transitions. [2023-11-06 23:09:40,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-06 23:09:40,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:40,602 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:40,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:40,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 23:09:40,808 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:40,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:40,809 INFO L85 PathProgramCache]: Analyzing trace with hash -443713253, now seen corresponding path program 1 times [2023-11-06 23:09:40,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:40,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239206667] [2023-11-06 23:09:40,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:40,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:40,948 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-06 23:09:40,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:40,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239206667] [2023-11-06 23:09:40,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239206667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:40,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232050649] [2023-11-06 23:09:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:40,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:40,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:40,950 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:40,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:09:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:41,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:09:41,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-06 23:09:41,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:41,236 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-06 23:09:41,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232050649] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:41,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:41,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 12 [2023-11-06 23:09:41,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864233254] [2023-11-06 23:09:41,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:41,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:09:41,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:41,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:09:41,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:09:41,239 INFO L87 Difference]: Start difference. First operand 1632 states and 2262 transitions. Second operand has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:42,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:42,525 INFO L93 Difference]: Finished difference Result 6762 states and 9215 transitions. [2023-11-06 23:09:42,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-06 23:09:42,525 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-06 23:09:42,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:42,562 INFO L225 Difference]: With dead ends: 6762 [2023-11-06 23:09:42,562 INFO L226 Difference]: Without dead ends: 6762 [2023-11-06 23:09:42,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=631, Invalid=2021, Unknown=0, NotChecked=0, Total=2652 [2023-11-06 23:09:42,564 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 468 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:42,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 632 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 23:09:42,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6762 states. [2023-11-06 23:09:42,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6762 to 4625. [2023-11-06 23:09:42,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4625 states, 4614 states have (on average 1.4195925444299957) internal successors, (6550), 4624 states have internal predecessors, (6550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:42,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4625 states to 4625 states and 6550 transitions. [2023-11-06 23:09:42,715 INFO L78 Accepts]: Start accepts. Automaton has 4625 states and 6550 transitions. Word has length 59 [2023-11-06 23:09:42,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:42,716 INFO L495 AbstractCegarLoop]: Abstraction has 4625 states and 6550 transitions. [2023-11-06 23:09:42,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:42,716 INFO L276 IsEmpty]: Start isEmpty. Operand 4625 states and 6550 transitions. [2023-11-06 23:09:42,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-06 23:09:42,718 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:42,718 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:42,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:42,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 23:09:42,925 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:42,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:42,926 INFO L85 PathProgramCache]: Analyzing trace with hash -791217300, now seen corresponding path program 1 times [2023-11-06 23:09:42,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:42,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731366261] [2023-11-06 23:09:42,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:42,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:43,106 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 68 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-06 23:09:43,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:43,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731366261] [2023-11-06 23:09:43,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731366261] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:43,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975384924] [2023-11-06 23:09:43,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:43,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:43,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:43,109 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:43,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:09:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:43,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:09:43,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 101 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 23:09:43,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:43,413 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 103 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 23:09:43,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975384924] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:43,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:43,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 14 [2023-11-06 23:09:43,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086010633] [2023-11-06 23:09:43,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:43,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:09:43,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:43,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:09:43,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:09:43,419 INFO L87 Difference]: Start difference. First operand 4625 states and 6550 transitions. Second operand has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:44,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:44,006 INFO L93 Difference]: Finished difference Result 7527 states and 10251 transitions. [2023-11-06 23:09:44,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 23:09:44,007 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-11-06 23:09:44,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:44,045 INFO L225 Difference]: With dead ends: 7527 [2023-11-06 23:09:44,045 INFO L226 Difference]: Without dead ends: 7527 [2023-11-06 23:09:44,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=426, Invalid=1380, Unknown=0, NotChecked=0, Total=1806 [2023-11-06 23:09:44,047 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 318 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:44,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 1081 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:09:44,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7527 states. [2023-11-06 23:09:44,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7527 to 4425. [2023-11-06 23:09:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4425 states, 4414 states have (on average 1.3948799275033983) internal successors, (6157), 4424 states have internal predecessors, (6157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:44,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4425 states to 4425 states and 6157 transitions. [2023-11-06 23:09:44,192 INFO L78 Accepts]: Start accepts. Automaton has 4425 states and 6157 transitions. Word has length 63 [2023-11-06 23:09:44,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:44,193 INFO L495 AbstractCegarLoop]: Abstraction has 4425 states and 6157 transitions. [2023-11-06 23:09:44,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:44,193 INFO L276 IsEmpty]: Start isEmpty. Operand 4425 states and 6157 transitions. [2023-11-06 23:09:44,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-06 23:09:44,195 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:44,195 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:44,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:44,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:44,401 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:44,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:44,402 INFO L85 PathProgramCache]: Analyzing trace with hash 767429099, now seen corresponding path program 1 times [2023-11-06 23:09:44,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:44,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828285079] [2023-11-06 23:09:44,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:44,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:44,614 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 72 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 23:09:44,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:44,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828285079] [2023-11-06 23:09:44,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828285079] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:44,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134512230] [2023-11-06 23:09:44,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:44,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:44,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:44,616 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:44,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:09:44,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:44,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 23:09:44,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:44,863 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 52 proven. 38 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-06 23:09:44,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 52 proven. 38 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-06 23:09:44,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134512230] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:44,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:44,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-11-06 23:09:44,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469488217] [2023-11-06 23:09:44,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:44,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:09:44,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:44,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:09:44,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:09:44,921 INFO L87 Difference]: Start difference. First operand 4425 states and 6157 transitions. Second operand has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:45,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:45,205 INFO L93 Difference]: Finished difference Result 2980 states and 3844 transitions. [2023-11-06 23:09:45,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 23:09:45,205 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 0 states have call successors, (0), 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 63 [2023-11-06 23:09:45,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:45,229 INFO L225 Difference]: With dead ends: 2980 [2023-11-06 23:09:45,236 INFO L226 Difference]: Without dead ends: 2980 [2023-11-06 23:09:45,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2023-11-06 23:09:45,237 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 469 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 1381 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:45,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 1381 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:09:45,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2980 states. [2023-11-06 23:09:45,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2980 to 2865. [2023-11-06 23:09:45,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2854 states have (on average 1.3135949544498948) internal successors, (3749), 2864 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:45,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 3749 transitions. [2023-11-06 23:09:45,301 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 3749 transitions. Word has length 63 [2023-11-06 23:09:45,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:45,302 INFO L495 AbstractCegarLoop]: Abstraction has 2865 states and 3749 transitions. [2023-11-06 23:09:45,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:45,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 3749 transitions. [2023-11-06 23:09:45,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-06 23:09:45,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:45,303 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:45,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:45,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:45,517 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:45,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:45,517 INFO L85 PathProgramCache]: Analyzing trace with hash 965172541, now seen corresponding path program 1 times [2023-11-06 23:09:45,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:45,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261312475] [2023-11-06 23:09:45,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:45,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-06 23:09:45,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:45,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261312475] [2023-11-06 23:09:45,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261312475] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:45,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624177966] [2023-11-06 23:09:45,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:45,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:45,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:45,680 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:45,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:09:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:45,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:09:45,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-06 23:09:45,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:45,964 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-06 23:09:45,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624177966] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:45,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:45,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-11-06 23:09:45,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616577500] [2023-11-06 23:09:45,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:45,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:09:45,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:45,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:09:45,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:09:45,966 INFO L87 Difference]: Start difference. First operand 2865 states and 3749 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 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) [2023-11-06 23:09:46,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:46,052 INFO L93 Difference]: Finished difference Result 2863 states and 3720 transitions. [2023-11-06 23:09:46,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:09:46,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 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) Word has length 64 [2023-11-06 23:09:46,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:46,059 INFO L225 Difference]: With dead ends: 2863 [2023-11-06 23:09:46,060 INFO L226 Difference]: Without dead ends: 2863 [2023-11-06 23:09:46,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:09:46,061 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 110 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:46,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 256 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:09:46,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2023-11-06 23:09:46,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 2854. [2023-11-06 23:09:46,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2854 states, 2843 states have (on average 1.307069996482589) internal successors, (3716), 2853 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:46,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2854 states to 2854 states and 3716 transitions. [2023-11-06 23:09:46,123 INFO L78 Accepts]: Start accepts. Automaton has 2854 states and 3716 transitions. Word has length 64 [2023-11-06 23:09:46,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:46,123 INFO L495 AbstractCegarLoop]: Abstraction has 2854 states and 3716 transitions. [2023-11-06 23:09:46,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 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) [2023-11-06 23:09:46,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2854 states and 3716 transitions. [2023-11-06 23:09:46,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-06 23:09:46,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:46,125 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:46,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:46,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:46,331 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:46,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:46,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1737502264, now seen corresponding path program 1 times [2023-11-06 23:09:46,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:46,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381181726] [2023-11-06 23:09:46,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:46,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 89 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-06 23:09:46,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:46,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381181726] [2023-11-06 23:09:46,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381181726] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:46,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84763631] [2023-11-06 23:09:46,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:46,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:46,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:46,500 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:46,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:09:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:46,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:09:46,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 95 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-06 23:09:46,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:46,778 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 97 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-06 23:09:46,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84763631] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:46,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:46,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 11 [2023-11-06 23:09:46,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569214406] [2023-11-06 23:09:46,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:46,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 23:09:46,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:46,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 23:09:46,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:09:46,781 INFO L87 Difference]: Start difference. First operand 2854 states and 3716 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 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) [2023-11-06 23:09:47,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:47,000 INFO L93 Difference]: Finished difference Result 2897 states and 3714 transitions. [2023-11-06 23:09:47,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:09:47,001 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 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 65 [2023-11-06 23:09:47,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:47,008 INFO L225 Difference]: With dead ends: 2897 [2023-11-06 23:09:47,009 INFO L226 Difference]: Without dead ends: 2897 [2023-11-06 23:09:47,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2023-11-06 23:09:47,010 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 116 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:47,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 740 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:09:47,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2023-11-06 23:09:47,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2136. [2023-11-06 23:09:47,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2125 states have (on average 1.3035294117647058) internal successors, (2770), 2135 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:47,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 2770 transitions. [2023-11-06 23:09:47,054 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 2770 transitions. Word has length 65 [2023-11-06 23:09:47,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:47,054 INFO L495 AbstractCegarLoop]: Abstraction has 2136 states and 2770 transitions. [2023-11-06 23:09:47,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 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) [2023-11-06 23:09:47,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 2770 transitions. [2023-11-06 23:09:47,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-06 23:09:47,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:47,056 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:47,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:47,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:47,262 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:47,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:47,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1937207539, now seen corresponding path program 1 times [2023-11-06 23:09:47,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:47,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764458055] [2023-11-06 23:09:47,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:47,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-06 23:09:47,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:47,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764458055] [2023-11-06 23:09:47,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764458055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:47,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643635359] [2023-11-06 23:09:47,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:47,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:47,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:47,495 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:47,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 23:09:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:47,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:09:47,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:47,668 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:09:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-06 23:09:47,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-06 23:09:48,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643635359] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:48,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:48,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-06 23:09:48,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236423224] [2023-11-06 23:09:48,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:48,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 23:09:48,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:48,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 23:09:48,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:09:48,221 INFO L87 Difference]: Start difference. First operand 2136 states and 2770 transitions. Second operand has 11 states, 10 states have (on average 11.4) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:48,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:48,658 INFO L93 Difference]: Finished difference Result 4146 states and 5271 transitions. [2023-11-06 23:09:48,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:09:48,659 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 11.4) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 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 69 [2023-11-06 23:09:48,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:48,668 INFO L225 Difference]: With dead ends: 4146 [2023-11-06 23:09:48,669 INFO L226 Difference]: Without dead ends: 4146 [2023-11-06 23:09:48,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:09:48,670 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 590 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:48,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 555 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:09:48,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4146 states. [2023-11-06 23:09:48,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4146 to 3102. [2023-11-06 23:09:48,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3102 states, 3091 states have (on average 1.3154318990617924) internal successors, (4066), 3101 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:48,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 4066 transitions. [2023-11-06 23:09:48,741 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 4066 transitions. Word has length 69 [2023-11-06 23:09:48,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:48,741 INFO L495 AbstractCegarLoop]: Abstraction has 3102 states and 4066 transitions. [2023-11-06 23:09:48,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 11.4) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:48,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 4066 transitions. [2023-11-06 23:09:48,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-06 23:09:48,744 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:48,744 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 8, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:48,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:48,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:48,950 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:48,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:48,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1779624174, now seen corresponding path program 1 times [2023-11-06 23:09:48,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:48,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369677895] [2023-11-06 23:09:48,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:48,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-11-06 23:09:49,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:49,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369677895] [2023-11-06 23:09:49,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369677895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:49,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:49,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:09:49,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269771355] [2023-11-06 23:09:49,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:49,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:09:49,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:49,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:09:49,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:09:49,141 INFO L87 Difference]: Start difference. First operand 3102 states and 4066 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:49,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:49,240 INFO L93 Difference]: Finished difference Result 4906 states and 6478 transitions. [2023-11-06 23:09:49,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:09:49,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 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 88 [2023-11-06 23:09:49,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:49,251 INFO L225 Difference]: With dead ends: 4906 [2023-11-06 23:09:49,251 INFO L226 Difference]: Without dead ends: 4906 [2023-11-06 23:09:49,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:09:49,252 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 104 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:49,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 294 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:09:49,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4906 states. [2023-11-06 23:09:49,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4906 to 3244. [2023-11-06 23:09:49,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3244 states, 3233 states have (on average 1.3201360965047944) internal successors, (4268), 3243 states have internal predecessors, (4268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:49,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3244 states to 3244 states and 4268 transitions. [2023-11-06 23:09:49,327 INFO L78 Accepts]: Start accepts. Automaton has 3244 states and 4268 transitions. Word has length 88 [2023-11-06 23:09:49,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:49,327 INFO L495 AbstractCegarLoop]: Abstraction has 3244 states and 4268 transitions. [2023-11-06 23:09:49,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:49,328 INFO L276 IsEmpty]: Start isEmpty. Operand 3244 states and 4268 transitions. [2023-11-06 23:09:49,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-06 23:09:49,330 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:49,330 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 9, 6, 6, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:49,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-06 23:09:49,331 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:49,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:49,331 INFO L85 PathProgramCache]: Analyzing trace with hash -93068261, now seen corresponding path program 1 times [2023-11-06 23:09:49,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:49,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987410579] [2023-11-06 23:09:49,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:49,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:49,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 61 proven. 147 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-06 23:09:49,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:49,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987410579] [2023-11-06 23:09:49,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987410579] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:49,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839804394] [2023-11-06 23:09:49,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:49,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:49,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:49,561 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:49,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 23:09:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:49,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:09:49,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:49,804 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2023-11-06 23:09:49,804 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:09:49,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839804394] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:49,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:09:49,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2023-11-06 23:09:49,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322052763] [2023-11-06 23:09:49,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:49,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:49,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:49,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:49,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:09:49,806 INFO L87 Difference]: Start difference. First operand 3244 states and 4268 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:49,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:49,861 INFO L93 Difference]: Finished difference Result 3609 states and 4617 transitions. [2023-11-06 23:09:49,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:49,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2023-11-06 23:09:49,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:49,869 INFO L225 Difference]: With dead ends: 3609 [2023-11-06 23:09:49,869 INFO L226 Difference]: Without dead ends: 3609 [2023-11-06 23:09:49,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:09:49,870 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 54 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:49,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 134 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:09:49,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2023-11-06 23:09:49,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 3280. [2023-11-06 23:09:49,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 3269 states have (on average 1.2970327317222392) internal successors, (4240), 3279 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:49,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 4240 transitions. [2023-11-06 23:09:49,924 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 4240 transitions. Word has length 96 [2023-11-06 23:09:49,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:49,925 INFO L495 AbstractCegarLoop]: Abstraction has 3280 states and 4240 transitions. [2023-11-06 23:09:49,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:49,925 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 4240 transitions. [2023-11-06 23:09:49,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-06 23:09:49,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:49,928 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 9, 6, 6, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:49,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:50,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:50,134 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:50,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:50,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1826247984, now seen corresponding path program 1 times [2023-11-06 23:09:50,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:50,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812490203] [2023-11-06 23:09:50,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:50,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:50,333 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 79 proven. 3 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-11-06 23:09:50,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:50,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812490203] [2023-11-06 23:09:50,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812490203] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:50,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400505251] [2023-11-06 23:09:50,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:50,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:50,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:50,335 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:50,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 23:09:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:50,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 23:09:50,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:50,641 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 73 proven. 65 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-11-06 23:09:50,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 73 proven. 65 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-11-06 23:09:50,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400505251] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:50,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:50,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2023-11-06 23:09:50,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694268317] [2023-11-06 23:09:50,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:50,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:09:50,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:50,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:09:50,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:09:50,754 INFO L87 Difference]: Start difference. First operand 3280 states and 4240 transitions. Second operand has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:51,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:51,100 INFO L93 Difference]: Finished difference Result 3081 states and 3700 transitions. [2023-11-06 23:09:51,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 23:09:51,101 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2023-11-06 23:09:51,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:51,108 INFO L225 Difference]: With dead ends: 3081 [2023-11-06 23:09:51,108 INFO L226 Difference]: Without dead ends: 3081 [2023-11-06 23:09:51,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2023-11-06 23:09:51,109 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 187 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:51,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 1447 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:09:51,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3081 states. [2023-11-06 23:09:51,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3081 to 2219. [2023-11-06 23:09:51,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2219 states, 2209 states have (on average 1.2204617473970123) internal successors, (2696), 2218 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:51,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 2696 transitions. [2023-11-06 23:09:51,163 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 2696 transitions. Word has length 98 [2023-11-06 23:09:51,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:51,164 INFO L495 AbstractCegarLoop]: Abstraction has 2219 states and 2696 transitions. [2023-11-06 23:09:51,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:51,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 2696 transitions. [2023-11-06 23:09:51,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-06 23:09:51,171 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:51,171 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:51,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:51,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 23:09:51,378 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:51,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:51,378 INFO L85 PathProgramCache]: Analyzing trace with hash -932844676, now seen corresponding path program 1 times [2023-11-06 23:09:51,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:51,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521686079] [2023-11-06 23:09:51,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:51,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-06 23:09:51,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:51,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521686079] [2023-11-06 23:09:51,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521686079] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:51,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154441725] [2023-11-06 23:09:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:51,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:51,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:51,618 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:51,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 23:09:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:51,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:09:51,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:51,798 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 6 treesize of output 5 [2023-11-06 23:09:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-06 23:09:51,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-06 23:09:52,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154441725] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:52,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:52,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-11-06 23:09:52,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225915115] [2023-11-06 23:09:52,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:52,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:09:52,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:52,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:09:52,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:09:52,076 INFO L87 Difference]: Start difference. First operand 2219 states and 2696 transitions. Second operand has 6 states, 5 states have (on average 13.4) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:52,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:52,392 INFO L93 Difference]: Finished difference Result 3137 states and 3757 transitions. [2023-11-06 23:09:52,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 23:09:52,393 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2023-11-06 23:09:52,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:52,399 INFO L225 Difference]: With dead ends: 3137 [2023-11-06 23:09:52,399 INFO L226 Difference]: Without dead ends: 3137 [2023-11-06 23:09:52,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:09:52,400 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 327 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:52,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 409 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:09:52,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3137 states. [2023-11-06 23:09:52,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3137 to 2220. [2023-11-06 23:09:52,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2220 states, 2211 states have (on average 1.2207146087743104) internal successors, (2699), 2219 states have internal predecessors, (2699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:52,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 2699 transitions. [2023-11-06 23:09:52,455 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 2699 transitions. Word has length 111 [2023-11-06 23:09:52,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:52,456 INFO L495 AbstractCegarLoop]: Abstraction has 2220 states and 2699 transitions. [2023-11-06 23:09:52,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:52,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 2699 transitions. [2023-11-06 23:09:52,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-06 23:09:52,459 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:52,459 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:52,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:52,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:52,665 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:52,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:52,666 INFO L85 PathProgramCache]: Analyzing trace with hash -932844675, now seen corresponding path program 1 times [2023-11-06 23:09:52,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:52,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561787193] [2023-11-06 23:09:52,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:52,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-06 23:09:53,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:53,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561787193] [2023-11-06 23:09:53,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561787193] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:53,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061103240] [2023-11-06 23:09:53,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:53,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:53,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:53,048 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:53,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 23:09:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:53,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 23:09:53,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:53,655 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-06 23:09:53,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-06 23:09:54,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061103240] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:54,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:54,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 16 [2023-11-06 23:09:54,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469673519] [2023-11-06 23:09:54,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:54,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 23:09:54,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:54,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 23:09:54,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-11-06 23:09:54,164 INFO L87 Difference]: Start difference. First operand 2220 states and 2699 transitions. Second operand has 17 states, 16 states have (on average 11.4375) internal successors, (183), 17 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:55,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:55,235 INFO L93 Difference]: Finished difference Result 6437 states and 7750 transitions. [2023-11-06 23:09:55,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 23:09:55,236 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 11.4375) internal successors, (183), 17 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2023-11-06 23:09:55,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:55,247 INFO L225 Difference]: With dead ends: 6437 [2023-11-06 23:09:55,247 INFO L226 Difference]: Without dead ends: 6437 [2023-11-06 23:09:55,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=374, Invalid=958, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 23:09:55,249 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 1262 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1262 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:55,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1262 Valid, 932 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 23:09:55,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6437 states. [2023-11-06 23:09:55,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6437 to 2346. [2023-11-06 23:09:55,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2337 states have (on average 1.2259306803594352) internal successors, (2865), 2345 states have internal predecessors, (2865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:55,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 2865 transitions. [2023-11-06 23:09:55,307 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 2865 transitions. Word has length 111 [2023-11-06 23:09:55,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:55,307 INFO L495 AbstractCegarLoop]: Abstraction has 2346 states and 2865 transitions. [2023-11-06 23:09:55,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 11.4375) internal successors, (183), 17 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:55,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 2865 transitions. [2023-11-06 23:09:55,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-06 23:09:55,310 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:55,310 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:55,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:55,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 23:09:55,517 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:55,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:55,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1146584722, now seen corresponding path program 1 times [2023-11-06 23:09:55,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:55,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693211539] [2023-11-06 23:09:55,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:55,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 28 proven. 213 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-06 23:09:55,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:55,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693211539] [2023-11-06 23:09:55,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693211539] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:55,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060976076] [2023-11-06 23:09:55,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:55,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:55,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:55,801 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:55,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 23:09:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:55,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:09:55,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:56,128 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-06 23:09:56,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:56,251 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-06 23:09:56,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060976076] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:56,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:56,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 11 [2023-11-06 23:09:56,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27157791] [2023-11-06 23:09:56,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:56,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 23:09:56,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:56,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 23:09:56,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:09:56,254 INFO L87 Difference]: Start difference. First operand 2346 states and 2865 transitions. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:57,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:57,331 INFO L93 Difference]: Finished difference Result 5252 states and 6314 transitions. [2023-11-06 23:09:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 23:09:57,332 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 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 112 [2023-11-06 23:09:57,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:57,347 INFO L225 Difference]: With dead ends: 5252 [2023-11-06 23:09:57,347 INFO L226 Difference]: Without dead ends: 5252 [2023-11-06 23:09:57,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=512, Invalid=1468, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 23:09:57,351 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 668 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:57,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 1073 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 23:09:57,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5252 states. [2023-11-06 23:09:57,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5252 to 2346. [2023-11-06 23:09:57,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2337 states have (on average 1.2229353872486093) internal successors, (2858), 2345 states have internal predecessors, (2858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:57,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 2858 transitions. [2023-11-06 23:09:57,401 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 2858 transitions. Word has length 112 [2023-11-06 23:09:57,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:57,402 INFO L495 AbstractCegarLoop]: Abstraction has 2346 states and 2858 transitions. [2023-11-06 23:09:57,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:57,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 2858 transitions. [2023-11-06 23:09:57,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-06 23:09:57,405 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:57,405 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:57,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:57,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 23:09:57,612 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:57,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:57,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1937224330, now seen corresponding path program 1 times [2023-11-06 23:09:57,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:57,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414073667] [2023-11-06 23:09:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:57,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-06 23:09:57,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:57,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414073667] [2023-11-06 23:09:57,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414073667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:57,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029995861] [2023-11-06 23:09:57,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:57,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:57,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:57,944 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:57,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 23:09:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:58,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:09:58,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-06 23:09:58,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-06 23:09:58,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029995861] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:58,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:58,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-11-06 23:09:58,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206546878] [2023-11-06 23:09:58,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:58,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:09:58,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:58,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:09:58,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:09:58,477 INFO L87 Difference]: Start difference. First operand 2346 states and 2858 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:58,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:58,769 INFO L93 Difference]: Finished difference Result 4551 states and 5504 transitions. [2023-11-06 23:09:58,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:09:58,770 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 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 114 [2023-11-06 23:09:58,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:58,778 INFO L225 Difference]: With dead ends: 4551 [2023-11-06 23:09:58,778 INFO L226 Difference]: Without dead ends: 4551 [2023-11-06 23:09:58,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 229 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:09:58,779 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 537 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:58,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 266 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:09:58,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4551 states. [2023-11-06 23:09:58,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4551 to 2347. [2023-11-06 23:09:58,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2338 states have (on average 1.2228400342172798) internal successors, (2859), 2346 states have internal predecessors, (2859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:58,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 2859 transitions. [2023-11-06 23:09:58,843 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 2859 transitions. Word has length 114 [2023-11-06 23:09:58,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:58,844 INFO L495 AbstractCegarLoop]: Abstraction has 2347 states and 2859 transitions. [2023-11-06 23:09:58,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:58,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 2859 transitions. [2023-11-06 23:09:58,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-06 23:09:58,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:58,855 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:58,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:59,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:59,061 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:09:59,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:59,062 INFO L85 PathProgramCache]: Analyzing trace with hash -374280255, now seen corresponding path program 1 times [2023-11-06 23:09:59,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:59,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465271035] [2023-11-06 23:09:59,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:59,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 41 proven. 275 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-06 23:10:00,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:00,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465271035] [2023-11-06 23:10:00,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465271035] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:00,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110230721] [2023-11-06 23:10:00,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:00,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:00,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:00,989 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:01,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 23:10:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:01,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 23:10:01,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:01,757 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 [2023-11-06 23:10:01,761 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 [2023-11-06 23:10:01,843 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:01,843 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 17 treesize of output 15 [2023-11-06 23:10:01,857 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:01,857 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 17 treesize of output 15 [2023-11-06 23:10:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 46 proven. 192 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-06 23:10:01,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:02,041 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 12 treesize of output 10 [2023-11-06 23:10:02,045 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 18 treesize of output 16 [2023-11-06 23:10:02,550 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 46 proven. 192 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-06 23:10:02,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110230721] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:02,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:02,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 24 [2023-11-06 23:10:02,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496664011] [2023-11-06 23:10:02,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:02,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:10:02,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:02,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:10:02,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:10:02,553 INFO L87 Difference]: Start difference. First operand 2347 states and 2859 transitions. Second operand has 25 states, 25 states have (on average 6.32) internal successors, (158), 24 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:05,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:05,366 INFO L93 Difference]: Finished difference Result 7258 states and 8625 transitions. [2023-11-06 23:10:05,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-06 23:10:05,366 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.32) internal successors, (158), 24 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2023-11-06 23:10:05,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:05,380 INFO L225 Difference]: With dead ends: 7258 [2023-11-06 23:10:05,380 INFO L226 Difference]: Without dead ends: 7258 [2023-11-06 23:10:05,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=777, Invalid=3645, Unknown=0, NotChecked=0, Total=4422 [2023-11-06 23:10:05,383 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 1671 mSDsluCounter, 1980 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1671 SdHoareTripleChecker+Valid, 2118 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:05,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1671 Valid, 2118 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 23:10:05,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7258 states. [2023-11-06 23:10:05,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7258 to 2899. [2023-11-06 23:10:05,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2899 states, 2890 states have (on average 1.221107266435986) internal successors, (3529), 2898 states have internal predecessors, (3529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:05,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 3529 transitions. [2023-11-06 23:10:05,441 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 3529 transitions. Word has length 117 [2023-11-06 23:10:05,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:05,442 INFO L495 AbstractCegarLoop]: Abstraction has 2899 states and 3529 transitions. [2023-11-06 23:10:05,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.32) internal successors, (158), 24 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:05,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 3529 transitions. [2023-11-06 23:10:05,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-06 23:10:05,445 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:05,446 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 8, 7, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:05,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:05,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:05,652 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:10:05,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:05,653 INFO L85 PathProgramCache]: Analyzing trace with hash 779532359, now seen corresponding path program 1 times [2023-11-06 23:10:05,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:05,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124013577] [2023-11-06 23:10:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:05,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 84 proven. 313 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 23:10:06,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:06,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124013577] [2023-11-06 23:10:06,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124013577] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:06,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268730444] [2023-11-06 23:10:06,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:06,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:06,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:06,477 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:06,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 23:10:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:06,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-06 23:10:06,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:06,878 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 [2023-11-06 23:10:06,884 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 [2023-11-06 23:10:07,149 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:07,149 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 17 treesize of output 15 [2023-11-06 23:10:07,162 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:07,162 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 17 treesize of output 15 [2023-11-06 23:10:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 80 proven. 317 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 23:10:07,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:08,242 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 14 treesize of output 12 [2023-11-06 23:10:08,247 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-06 23:10:08,264 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 14 treesize of output 12 [2023-11-06 23:10:08,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:10:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 76 proven. 321 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 23:10:08,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268730444] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:08,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:08,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2023-11-06 23:10:08,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635947505] [2023-11-06 23:10:08,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:08,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:10:08,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:08,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:10:08,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:10:08,677 INFO L87 Difference]: Start difference. First operand 2899 states and 3529 transitions. Second operand has 25 states, 25 states have (on average 8.76) internal successors, (219), 24 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:12,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:12,158 INFO L93 Difference]: Finished difference Result 15149 states and 17842 transitions. [2023-11-06 23:10:12,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-06 23:10:12,159 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 8.76) internal successors, (219), 24 states have internal predecessors, (219), 0 states have call successors, (0), 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 117 [2023-11-06 23:10:12,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:12,179 INFO L225 Difference]: With dead ends: 15149 [2023-11-06 23:10:12,179 INFO L226 Difference]: Without dead ends: 15149 [2023-11-06 23:10:12,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2054 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1155, Invalid=6155, Unknown=0, NotChecked=0, Total=7310 [2023-11-06 23:10:12,183 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 1749 mSDsluCounter, 2989 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1749 SdHoareTripleChecker+Valid, 3167 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:12,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1749 Valid, 3167 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1336 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 23:10:12,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15149 states. [2023-11-06 23:10:12,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15149 to 8359. [2023-11-06 23:10:12,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8359 states, 8350 states have (on average 1.2140119760479042) internal successors, (10137), 8358 states have internal predecessors, (10137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:12,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8359 states to 8359 states and 10137 transitions. [2023-11-06 23:10:12,329 INFO L78 Accepts]: Start accepts. Automaton has 8359 states and 10137 transitions. Word has length 117 [2023-11-06 23:10:12,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:12,329 INFO L495 AbstractCegarLoop]: Abstraction has 8359 states and 10137 transitions. [2023-11-06 23:10:12,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.76) internal successors, (219), 24 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:12,330 INFO L276 IsEmpty]: Start isEmpty. Operand 8359 states and 10137 transitions. [2023-11-06 23:10:12,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-06 23:10:12,334 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:12,335 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:12,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:12,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-06 23:10:12,541 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:10:12,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:12,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1282212589, now seen corresponding path program 1 times [2023-11-06 23:10:12,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:12,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909421449] [2023-11-06 23:10:12,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:12,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-06 23:10:12,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:12,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909421449] [2023-11-06 23:10:12,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909421449] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:12,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973990883] [2023-11-06 23:10:12,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:12,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:12,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:12,934 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:12,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 23:10:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:13,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 23:10:13,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:13,349 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 13 treesize of output 9 [2023-11-06 23:10:13,376 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-06 23:10:13,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:13,561 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_~x1~0.base_28 Int)) (or (not (= (select |c_#valid| v_~x1~0.base_28) 0)) (= (store |c_#valid| v_~x1~0.base_28 0) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2023-11-06 23:10:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 97 trivial. 48 not checked. [2023-11-06 23:10:13,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973990883] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:13,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:13,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 8 [2023-11-06 23:10:13,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074602514] [2023-11-06 23:10:13,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:13,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:10:13,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:13,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:10:13,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=43, Unknown=1, NotChecked=12, Total=72 [2023-11-06 23:10:13,589 INFO L87 Difference]: Start difference. First operand 8359 states and 10137 transitions. Second operand has 9 states, 8 states have (on average 10.25) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:14,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:14,055 INFO L93 Difference]: Finished difference Result 19145 states and 23137 transitions. [2023-11-06 23:10:14,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:10:14,056 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2023-11-06 23:10:14,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:14,110 INFO L225 Difference]: With dead ends: 19145 [2023-11-06 23:10:14,110 INFO L226 Difference]: Without dead ends: 19127 [2023-11-06 23:10:14,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 233 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=201, Unknown=1, NotChecked=30, Total=306 [2023-11-06 23:10:14,111 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 412 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 414 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:14,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 680 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 283 Invalid, 0 Unknown, 414 Unchecked, 0.3s Time] [2023-11-06 23:10:14,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19127 states. [2023-11-06 23:10:14,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19127 to 14153. [2023-11-06 23:10:14,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14153 states, 14144 states have (on average 1.2128817873303168) internal successors, (17155), 14152 states have internal predecessors, (17155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:14,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14153 states to 14153 states and 17155 transitions. [2023-11-06 23:10:14,319 INFO L78 Accepts]: Start accepts. Automaton has 14153 states and 17155 transitions. Word has length 118 [2023-11-06 23:10:14,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:14,320 INFO L495 AbstractCegarLoop]: Abstraction has 14153 states and 17155 transitions. [2023-11-06 23:10:14,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:14,320 INFO L276 IsEmpty]: Start isEmpty. Operand 14153 states and 17155 transitions. [2023-11-06 23:10:14,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-06 23:10:14,332 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:14,332 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 8, 8, 8, 7, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:14,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:14,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-06 23:10:14,539 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:10:14,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:14,539 INFO L85 PathProgramCache]: Analyzing trace with hash -224880734, now seen corresponding path program 1 times [2023-11-06 23:10:14,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:14,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722853457] [2023-11-06 23:10:14,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:14,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 335 proven. 4 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-11-06 23:10:14,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:14,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722853457] [2023-11-06 23:10:14,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722853457] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:14,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217963344] [2023-11-06 23:10:14,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:14,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:14,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:14,854 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:14,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 23:10:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:15,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:10:15,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 335 proven. 4 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-11-06 23:10:15,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:15,172 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-11-06 23:10:15,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217963344] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:15,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:10:15,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 9 [2023-11-06 23:10:15,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449594443] [2023-11-06 23:10:15,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:15,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:10:15,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:15,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:10:15,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:10:15,175 INFO L87 Difference]: Start difference. First operand 14153 states and 17155 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:15,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:15,290 INFO L93 Difference]: Finished difference Result 8949 states and 10740 transitions. [2023-11-06 23:10:15,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:10:15,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 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 146 [2023-11-06 23:10:15,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:15,300 INFO L225 Difference]: With dead ends: 8949 [2023-11-06 23:10:15,300 INFO L226 Difference]: Without dead ends: 8949 [2023-11-06 23:10:15,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:10:15,301 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 49 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:15,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 327 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:10:15,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8949 states. [2023-11-06 23:10:15,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8949 to 8745. [2023-11-06 23:10:15,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8745 states, 8736 states have (on average 1.2042124542124542) internal successors, (10520), 8744 states have internal predecessors, (10520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:15,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8745 states to 8745 states and 10520 transitions. [2023-11-06 23:10:15,400 INFO L78 Accepts]: Start accepts. Automaton has 8745 states and 10520 transitions. Word has length 146 [2023-11-06 23:10:15,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:15,401 INFO L495 AbstractCegarLoop]: Abstraction has 8745 states and 10520 transitions. [2023-11-06 23:10:15,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:15,401 INFO L276 IsEmpty]: Start isEmpty. Operand 8745 states and 10520 transitions. [2023-11-06 23:10:15,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-06 23:10:15,409 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:15,409 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 14, 9, 9, 7, 6, 6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:15,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:15,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-06 23:10:15,616 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:10:15,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:15,616 INFO L85 PathProgramCache]: Analyzing trace with hash 368256012, now seen corresponding path program 2 times [2023-11-06 23:10:15,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:15,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765648406] [2023-11-06 23:10:15,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:15,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:15,865 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 336 proven. 3 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2023-11-06 23:10:15,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:15,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765648406] [2023-11-06 23:10:15,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765648406] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:15,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204863562] [2023-11-06 23:10:15,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:10:15,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:15,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:15,868 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:15,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 23:10:16,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:10:16,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:16,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 23:10:16,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 291 proven. 109 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-11-06 23:10:16,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 291 proven. 109 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-11-06 23:10:16,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204863562] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:16,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:16,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-06 23:10:16,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031730583] [2023-11-06 23:10:16,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:16,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 23:10:16,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:16,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 23:10:16,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:10:16,425 INFO L87 Difference]: Start difference. First operand 8745 states and 10520 transitions. Second operand has 13 states, 13 states have (on average 10.0) internal successors, (130), 13 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:16,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:16,755 INFO L93 Difference]: Finished difference Result 8245 states and 9459 transitions. [2023-11-06 23:10:16,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 23:10:16,755 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.0) internal successors, (130), 13 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 155 [2023-11-06 23:10:16,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:16,762 INFO L225 Difference]: With dead ends: 8245 [2023-11-06 23:10:16,762 INFO L226 Difference]: Without dead ends: 8245 [2023-11-06 23:10:16,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2023-11-06 23:10:16,763 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 294 mSDsluCounter, 1212 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 1391 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:16,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 1391 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:10:16,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8245 states. [2023-11-06 23:10:16,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8245 to 7447. [2023-11-06 23:10:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7447 states, 7438 states have (on average 1.1560903468674375) internal successors, (8599), 7446 states have internal predecessors, (8599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:16,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7447 states to 7447 states and 8599 transitions. [2023-11-06 23:10:16,844 INFO L78 Accepts]: Start accepts. Automaton has 7447 states and 8599 transitions. Word has length 155 [2023-11-06 23:10:16,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:16,844 INFO L495 AbstractCegarLoop]: Abstraction has 7447 states and 8599 transitions. [2023-11-06 23:10:16,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.0) internal successors, (130), 13 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:16,845 INFO L276 IsEmpty]: Start isEmpty. Operand 7447 states and 8599 transitions. [2023-11-06 23:10:16,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-11-06 23:10:16,851 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:16,852 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 10, 10, 8, 8, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:16,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:17,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-06 23:10:17,058 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:10:17,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:17,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1761139834, now seen corresponding path program 1 times [2023-11-06 23:10:17,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:17,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505198400] [2023-11-06 23:10:17,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:17,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:18,642 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 104 proven. 679 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-06 23:10:18,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:18,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505198400] [2023-11-06 23:10:18,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505198400] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:18,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257194574] [2023-11-06 23:10:18,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:18,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:18,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:18,645 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:18,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 23:10:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:18,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-06 23:10:18,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:18,933 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 6 treesize of output 5 [2023-11-06 23:10:19,154 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 [2023-11-06 23:10:19,163 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 [2023-11-06 23:10:19,441 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:10:19,441 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 23:10:19,483 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 [2023-11-06 23:10:19,488 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 [2023-11-06 23:10:19,508 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 16 treesize of output 11 [2023-11-06 23:10:19,517 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 [2023-11-06 23:10:19,589 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 [2023-11-06 23:10:19,595 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 [2023-11-06 23:10:19,758 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 [2023-11-06 23:10:19,767 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 [2023-11-06 23:10:20,016 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:20,017 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 17 treesize of output 15 [2023-11-06 23:10:20,029 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:20,030 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 17 treesize of output 15 [2023-11-06 23:10:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 100 proven. 683 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-06 23:10:20,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:22,068 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:22,069 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 22 treesize of output 23 [2023-11-06 23:10:22,079 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:22,080 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 36 treesize of output 32 [2023-11-06 23:10:22,086 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 11 treesize of output 7 [2023-11-06 23:10:22,133 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:22,133 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 22 treesize of output 23 [2023-11-06 23:10:22,136 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:10:22,145 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:22,146 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 20 treesize of output 16 [2023-11-06 23:10:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 96 proven. 687 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-06 23:10:23,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257194574] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:23,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:23,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2023-11-06 23:10:23,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454989438] [2023-11-06 23:10:23,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:23,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 23:10:23,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:23,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 23:10:23,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=889, Unknown=1, NotChecked=0, Total=992 [2023-11-06 23:10:23,074 INFO L87 Difference]: Start difference. First operand 7447 states and 8599 transitions. Second operand has 32 states, 32 states have (on average 9.4375) internal successors, (302), 31 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:29,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:29,497 INFO L93 Difference]: Finished difference Result 32183 states and 36637 transitions. [2023-11-06 23:10:29,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-06 23:10:29,497 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 9.4375) internal successors, (302), 31 states have internal predecessors, (302), 0 states have call successors, (0), 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 162 [2023-11-06 23:10:29,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:29,525 INFO L225 Difference]: With dead ends: 32183 [2023-11-06 23:10:29,525 INFO L226 Difference]: Without dead ends: 32183 [2023-11-06 23:10:29,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4278 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2120, Invalid=12159, Unknown=1, NotChecked=0, Total=14280 [2023-11-06 23:10:29,529 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 3333 mSDsluCounter, 4070 mSDsCounter, 0 mSdLazyCounter, 2007 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3333 SdHoareTripleChecker+Valid, 4355 SdHoareTripleChecker+Invalid, 2191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 2007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:29,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3333 Valid, 4355 Invalid, 2191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 2007 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-06 23:10:29,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32183 states. [2023-11-06 23:10:29,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32183 to 13356. [2023-11-06 23:10:29,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13356 states, 13347 states have (on average 1.1522439499513) internal successors, (15379), 13355 states have internal predecessors, (15379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13356 states to 13356 states and 15379 transitions. [2023-11-06 23:10:29,740 INFO L78 Accepts]: Start accepts. Automaton has 13356 states and 15379 transitions. Word has length 162 [2023-11-06 23:10:29,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:29,740 INFO L495 AbstractCegarLoop]: Abstraction has 13356 states and 15379 transitions. [2023-11-06 23:10:29,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 9.4375) internal successors, (302), 31 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:29,741 INFO L276 IsEmpty]: Start isEmpty. Operand 13356 states and 15379 transitions. [2023-11-06 23:10:29,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-11-06 23:10:29,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:29,751 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 10, 10, 8, 8, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:29,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:29,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-06 23:10:29,957 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:10:29,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:29,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1850586310, now seen corresponding path program 2 times [2023-11-06 23:10:29,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:29,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497151959] [2023-11-06 23:10:29,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:29,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 104 proven. 685 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-06 23:10:31,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:31,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497151959] [2023-11-06 23:10:31,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497151959] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:31,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918051532] [2023-11-06 23:10:31,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:10:31,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:31,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:31,325 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:31,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 23:10:31,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:10:31,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:31,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-06 23:10:31,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:31,626 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 6 treesize of output 5 [2023-11-06 23:10:31,835 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 [2023-11-06 23:10:31,842 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 [2023-11-06 23:10:32,073 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:10:32,073 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 23:10:32,083 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 [2023-11-06 23:10:32,091 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 [2023-11-06 23:10:32,100 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 [2023-11-06 23:10:32,108 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 [2023-11-06 23:10:32,171 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 [2023-11-06 23:10:32,181 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 [2023-11-06 23:10:32,366 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 [2023-11-06 23:10:32,369 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 [2023-11-06 23:10:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 100 proven. 679 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-06 23:10:32,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:32,910 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~t4~0.offset 4))) (and (forall ((v_ArrVal_1467 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1467) c_~t4~0.base) .cse0) 0)) (forall ((v_ArrVal_1468 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1468) c_~t4~0.base) .cse0) 0)))) is different from false [2023-11-06 23:10:32,982 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~S~0.offset 4))) (and (forall ((v_ArrVal_1468 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1468) c_~S~0.base) .cse0) 0)) (forall ((v_ArrVal_1467 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1467) c_~S~0.base) .cse0) 0)))) is different from false [2023-11-06 23:10:33,553 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:33,553 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 22 treesize of output 23 [2023-11-06 23:10:33,557 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 36 treesize of output 24 [2023-11-06 23:10:33,561 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 11 treesize of output 7 [2023-11-06 23:10:33,571 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:33,572 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 22 treesize of output 23 [2023-11-06 23:10:33,574 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:10:33,576 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 20 treesize of output 8 [2023-11-06 23:10:33,937 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 90 proven. 381 refuted. 0 times theorem prover too weak. 50 trivial. 308 not checked. [2023-11-06 23:10:33,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918051532] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:33,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:33,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 23 [2023-11-06 23:10:33,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15608864] [2023-11-06 23:10:33,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:33,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 23:10:33,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:33,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 23:10:33,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=409, Unknown=3, NotChecked=82, Total=552 [2023-11-06 23:10:33,940 INFO L87 Difference]: Start difference. First operand 13356 states and 15379 transitions. Second operand has 24 states, 24 states have (on average 9.958333333333334) internal successors, (239), 23 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:52,267 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~S~0.offset 4))) (and (= 1 (select |c_#valid| c_~x1~0.base)) (forall ((v_~x1~0.base_32 Int)) (or (forall ((v_ArrVal_1468 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| v_~x1~0.base_32 v_ArrVal_1468) c_~S~0.base) .cse0) 0)) (not (= (select |c_#valid| v_~x1~0.base_32) 0)))) (forall ((v_ArrVal_1468 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1468) c_~S~0.base) .cse0) 0)) (forall ((v_ArrVal_1467 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1467) c_~S~0.base) .cse0) 0)) (= c_~t1~0.offset 0) (= c_~x4~0.offset 0) (= c_~t4~0.offset 0) (= c_~x4~0.base 0) (= c_~x1~0.offset 0) (forall ((v_~x1~0.base_32 Int)) (or (not (= (select |c_#valid| v_~x1~0.base_32) 0)) (forall ((v_ArrVal_1467 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| v_~x1~0.base_32 v_ArrVal_1467) c_~S~0.base) .cse0) 0)))) (= c_~t1~0.base 0))) is different from false [2023-11-06 23:10:52,356 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~S~0.offset 4))) (and (= 1 (select |c_#valid| c_~x1~0.base)) (forall ((v_~x1~0.base_32 Int)) (or (forall ((v_ArrVal_1468 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| v_~x1~0.base_32 v_ArrVal_1468) c_~S~0.base) .cse0) 0)) (not (= (select |c_#valid| v_~x1~0.base_32) 0)))) (forall ((v_ArrVal_1468 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1468) c_~S~0.base) .cse0) 0)) (forall ((v_ArrVal_1467 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1467) c_~S~0.base) .cse0) 0)) (= c_~t1~0.offset 0) (= c_~x4~0.offset 0) (= c_~t4~0.offset 0) (= c_~x4~0.base 0) (= c_~x1~0.offset 0) (= (select (select |c_#memory_$Pointer$.base| c_~t4~0.base) 4) 0) (forall ((v_~x1~0.base_32 Int)) (or (not (= (select |c_#valid| v_~x1~0.base_32) 0)) (forall ((v_ArrVal_1467 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| v_~x1~0.base_32 v_ArrVal_1467) c_~S~0.base) .cse0) 0)))) (= c_~t1~0.base 0) (= (select (select |c_#memory_$Pointer$.offset| c_~t4~0.base) 4) 0))) is different from false [2023-11-06 23:10:52,363 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~S~0.offset 4)) (.cse1 (+ 4 c_~x1~0.offset))) (and (forall ((v_ArrVal_1468 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1468) c_~S~0.base) .cse0) 0)) (forall ((v_ArrVal_1467 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1467) c_~S~0.base) .cse0) 0)) (forall ((v_~x1~0.base_32 Int)) (or (not (= (select |c_#valid| v_~x1~0.base_32) 0)) (forall ((v_ArrVal_1467 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| v_~x1~0.base_32 v_ArrVal_1467) c_~x1~0.base) .cse1) 0)))) (forall ((v_~x1~0.base_32 Int)) (or (not (= (select |c_#valid| v_~x1~0.base_32) 0)) (forall ((v_ArrVal_1468 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| v_~x1~0.base_32 v_ArrVal_1468) c_~x1~0.base) .cse1) 0)))))) is different from false [2023-11-06 23:10:56,268 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~S~0.offset 4))) (and (= 1 (select |c_#valid| c_~x1~0.base)) (forall ((v_~x1~0.base_32 Int)) (or (forall ((v_ArrVal_1468 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| v_~x1~0.base_32 v_ArrVal_1468) c_~S~0.base) .cse0) 0)) (not (= (select |c_#valid| v_~x1~0.base_32) 0)))) (forall ((v_ArrVal_1468 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1468) c_~S~0.base) .cse0) 0)) (forall ((v_ArrVal_1467 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1467) c_~S~0.base) .cse0) 0)) (= c_~t1~0.offset 0) (= c_~x4~0.offset 0) (= c_~x4~0.base 0) (= c_~x1~0.offset 0) (forall ((v_~x1~0.base_32 Int)) (or (not (= (select |c_#valid| v_~x1~0.base_32) 0)) (forall ((v_ArrVal_1467 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| v_~x1~0.base_32 v_ArrVal_1467) c_~S~0.base) .cse0) 0)))) (= c_~t1~0.base 0))) is different from false [2023-11-06 23:10:56,296 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~S~0.offset 4))) (and (= 1 (select |c_#valid| c_~x1~0.base)) (forall ((v_~x1~0.base_32 Int)) (or (forall ((v_ArrVal_1468 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| v_~x1~0.base_32 v_ArrVal_1468) c_~S~0.base) .cse0) 0)) (not (= (select |c_#valid| v_~x1~0.base_32) 0)))) (forall ((v_ArrVal_1468 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1468) c_~S~0.base) .cse0) 0)) (forall ((v_ArrVal_1467 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1467) c_~S~0.base) .cse0) 0)) (= c_~t1~0.offset 0) (= c_~t4~0.base 0) (= c_~x4~0.offset 0) (= c_~t4~0.offset 0) (= c_~x4~0.base 0) (= c_~x1~0.offset 0) (forall ((v_~x1~0.base_32 Int)) (or (not (= (select |c_#valid| v_~x1~0.base_32) 0)) (forall ((v_ArrVal_1467 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| v_~x1~0.base_32 v_ArrVal_1467) c_~S~0.base) .cse0) 0)))) (= c_~t1~0.base 0))) is different from false [2023-11-06 23:10:56,838 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~S~0.offset 4))) (and (= 1 (select |c_#valid| c_~x1~0.base)) (forall ((v_ArrVal_1468 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1468) c_~S~0.base) .cse0) 0)) (forall ((v_ArrVal_1467 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1467) c_~S~0.base) .cse0) 0)) (= c_~t1~0.offset 0) (= c_~x1~0.offset 0) (= c_~t1~0.base 0))) is different from false [2023-11-06 23:10:58,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:58,474 INFO L93 Difference]: Finished difference Result 52008 states and 59005 transitions. [2023-11-06 23:10:58,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2023-11-06 23:10:58,475 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 9.958333333333334) internal successors, (239), 23 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2023-11-06 23:10:58,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:58,514 INFO L225 Difference]: With dead ends: 52008 [2023-11-06 23:10:58,514 INFO L226 Difference]: Without dead ends: 52008 [2023-11-06 23:10:58,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 332 SyntacticMatches, 8 SemanticMatches, 190 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 14709 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=3764, Invalid=29904, Unknown=36, NotChecked=2968, Total=36672 [2023-11-06 23:10:58,521 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 3278 mSDsluCounter, 6234 mSDsCounter, 0 mSdLazyCounter, 2679 mSolverCounterSat, 210 mSolverCounterUnsat, 26 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3278 SdHoareTripleChecker+Valid, 6621 SdHoareTripleChecker+Invalid, 11951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 2679 IncrementalHoareTripleChecker+Invalid, 26 IncrementalHoareTripleChecker+Unknown, 9036 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:58,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3278 Valid, 6621 Invalid, 11951 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [210 Valid, 2679 Invalid, 26 Unknown, 9036 Unchecked, 3.4s Time] [2023-11-06 23:10:58,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52008 states. [2023-11-06 23:10:58,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52008 to 21949. [2023-11-06 23:10:58,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21949 states, 21940 states have (on average 1.1503646308113036) internal successors, (25239), 21948 states have internal predecessors, (25239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:58,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21949 states to 21949 states and 25239 transitions. [2023-11-06 23:10:58,883 INFO L78 Accepts]: Start accepts. Automaton has 21949 states and 25239 transitions. Word has length 162 [2023-11-06 23:10:58,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:58,883 INFO L495 AbstractCegarLoop]: Abstraction has 21949 states and 25239 transitions. [2023-11-06 23:10:58,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.958333333333334) internal successors, (239), 23 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:58,884 INFO L276 IsEmpty]: Start isEmpty. Operand 21949 states and 25239 transitions. [2023-11-06 23:10:58,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-11-06 23:10:58,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:58,894 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 10, 10, 8, 8, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:58,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:59,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-06 23:10:59,101 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:10:59,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:59,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1229648570, now seen corresponding path program 3 times [2023-11-06 23:10:59,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:59,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385605423] [2023-11-06 23:10:59,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:59,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 104 proven. 681 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-06 23:11:00,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:00,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385605423] [2023-11-06 23:11:00,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385605423] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:00,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812378894] [2023-11-06 23:11:00,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:11:00,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:00,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:00,421 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:00,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 23:11:00,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-06 23:11:00,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:00,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-06 23:11:00,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:00,916 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 6 treesize of output 5 [2023-11-06 23:11:01,121 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 [2023-11-06 23:11:01,135 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 [2023-11-06 23:11:01,529 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:11:01,530 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 23:11:01,571 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 [2023-11-06 23:11:01,584 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 [2023-11-06 23:11:01,594 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 [2023-11-06 23:11:01,599 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 [2023-11-06 23:11:01,672 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 [2023-11-06 23:11:01,680 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 [2023-11-06 23:11:01,829 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 [2023-11-06 23:11:01,835 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 [2023-11-06 23:11:01,952 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:11:01,952 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 17 treesize of output 19 [2023-11-06 23:11:01,978 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:11:01,978 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 17 treesize of output 19 [2023-11-06 23:11:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 138 proven. 623 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-06 23:11:02,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:03,896 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:11:03,897 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 22 treesize of output 23 [2023-11-06 23:11:03,902 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 36 treesize of output 24 [2023-11-06 23:11:03,906 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 11 treesize of output 7 [2023-11-06 23:11:03,917 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:11:03,918 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 22 treesize of output 23 [2023-11-06 23:11:03,920 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:11:03,922 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 20 treesize of output 8 [2023-11-06 23:11:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 96 proven. 665 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-06 23:11:04,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812378894] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:04,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:04,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2023-11-06 23:11:04,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929357925] [2023-11-06 23:11:04,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:04,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 23:11:04,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:04,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 23:11:04,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=672, Unknown=2, NotChecked=0, Total=756 [2023-11-06 23:11:04,379 INFO L87 Difference]: Start difference. First operand 21949 states and 25239 transitions. Second operand has 28 states, 28 states have (on average 10.178571428571429) internal successors, (285), 27 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:30,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:30,707 INFO L93 Difference]: Finished difference Result 103565 states and 117610 transitions. [2023-11-06 23:11:30,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 310 states. [2023-11-06 23:11:30,707 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 10.178571428571429) internal successors, (285), 27 states have internal predecessors, (285), 0 states have call successors, (0), 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 162 [2023-11-06 23:11:30,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:30,799 INFO L225 Difference]: With dead ends: 103565 [2023-11-06 23:11:30,799 INFO L226 Difference]: Without dead ends: 103565 [2023-11-06 23:11:30,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47942 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=12056, Invalid=95124, Unknown=76, NotChecked=0, Total=107256 [2023-11-06 23:11:30,809 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 4808 mSDsluCounter, 6421 mSDsCounter, 0 mSdLazyCounter, 3106 mSolverCounterSat, 433 mSolverCounterUnsat, 45 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4808 SdHoareTripleChecker+Valid, 6798 SdHoareTripleChecker+Invalid, 3584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 3106 IncrementalHoareTripleChecker+Invalid, 45 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:30,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4808 Valid, 6798 Invalid, 3584 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [433 Valid, 3106 Invalid, 45 Unknown, 0 Unchecked, 4.0s Time] [2023-11-06 23:11:30,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103565 states. [2023-11-06 23:11:31,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103565 to 27471. [2023-11-06 23:11:31,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27471 states, 27462 states have (on average 1.1470395455538562) internal successors, (31500), 27470 states have internal predecessors, (31500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:31,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27471 states to 27471 states and 31500 transitions. [2023-11-06 23:11:31,468 INFO L78 Accepts]: Start accepts. Automaton has 27471 states and 31500 transitions. Word has length 162 [2023-11-06 23:11:31,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:31,469 INFO L495 AbstractCegarLoop]: Abstraction has 27471 states and 31500 transitions. [2023-11-06 23:11:31,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.178571428571429) internal successors, (285), 27 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:31,469 INFO L276 IsEmpty]: Start isEmpty. Operand 27471 states and 31500 transitions. [2023-11-06 23:11:31,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-06 23:11:31,477 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:31,478 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 11, 11, 9, 8, 7, 7, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:31,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:31,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-06 23:11:31,685 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:11:31,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:31,686 INFO L85 PathProgramCache]: Analyzing trace with hash -115562864, now seen corresponding path program 4 times [2023-11-06 23:11:31,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:31,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800468534] [2023-11-06 23:11:31,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:31,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 117 proven. 744 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-06 23:11:32,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:32,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800468534] [2023-11-06 23:11:32,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800468534] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:32,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88594936] [2023-11-06 23:11:32,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:11:32,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:32,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:32,830 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:32,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 23:11:33,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:11:33,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:33,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 23:11:33,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:33,103 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 6 treesize of output 5 [2023-11-06 23:11:33,212 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 23:11:33,212 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 14 treesize of output 13 [2023-11-06 23:11:33,411 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 15 treesize of output 1 [2023-11-06 23:11:33,672 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:11:33,672 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 27 treesize of output 21 [2023-11-06 23:11:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 82 proven. 779 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-06 23:11:34,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:34,970 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 16 treesize of output 14 [2023-11-06 23:11:34,974 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 24 treesize of output 20 [2023-11-06 23:11:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 88 proven. 773 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-06 23:11:35,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88594936] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:35,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:35,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2023-11-06 23:11:35,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134301626] [2023-11-06 23:11:35,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:35,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 23:11:35,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:35,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 23:11:35,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2023-11-06 23:11:35,507 INFO L87 Difference]: Start difference. First operand 27471 states and 31500 transitions. Second operand has 30 states, 29 states have (on average 10.10344827586207) internal successors, (293), 30 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:39,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:39,157 INFO L93 Difference]: Finished difference Result 103687 states and 118037 transitions. [2023-11-06 23:11:39,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-06 23:11:39,158 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 10.10344827586207) internal successors, (293), 30 states have internal predecessors, (293), 0 states have call successors, (0), 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 173 [2023-11-06 23:11:39,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:39,253 INFO L225 Difference]: With dead ends: 103687 [2023-11-06 23:11:39,253 INFO L226 Difference]: Without dead ends: 103687 [2023-11-06 23:11:39,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 362 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1546, Invalid=5260, Unknown=0, NotChecked=0, Total=6806 [2023-11-06 23:11:39,254 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 1591 mSDsluCounter, 3761 mSDsCounter, 0 mSdLazyCounter, 2273 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1591 SdHoareTripleChecker+Valid, 4036 SdHoareTripleChecker+Invalid, 2354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:39,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1591 Valid, 4036 Invalid, 2354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2273 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-06 23:11:39,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103687 states. [2023-11-06 23:11:40,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103687 to 55495. [2023-11-06 23:11:40,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55495 states, 55486 states have (on average 1.1503982986699348) internal successors, (63831), 55494 states have internal predecessors, (63831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:40,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55495 states to 55495 states and 63831 transitions. [2023-11-06 23:11:40,422 INFO L78 Accepts]: Start accepts. Automaton has 55495 states and 63831 transitions. Word has length 173 [2023-11-06 23:11:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:40,422 INFO L495 AbstractCegarLoop]: Abstraction has 55495 states and 63831 transitions. [2023-11-06 23:11:40,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 10.10344827586207) internal successors, (293), 30 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:40,423 INFO L276 IsEmpty]: Start isEmpty. Operand 55495 states and 63831 transitions. [2023-11-06 23:11:40,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-06 23:11:40,433 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:40,433 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 11, 11, 9, 8, 7, 7, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:40,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:40,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-06 23:11:40,640 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:11:40,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:40,641 INFO L85 PathProgramCache]: Analyzing trace with hash -115562863, now seen corresponding path program 1 times [2023-11-06 23:11:40,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:40,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649780796] [2023-11-06 23:11:40,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:40,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 117 proven. 744 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-06 23:11:42,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:42,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649780796] [2023-11-06 23:11:42,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649780796] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:42,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677507555] [2023-11-06 23:11:42,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:42,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:42,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:42,565 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:42,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 23:11:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:42,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-06 23:11:42,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:42,850 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:11:42,857 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 6 treesize of output 5 [2023-11-06 23:11:43,207 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 23:11:43,207 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 14 treesize of output 13 [2023-11-06 23:11:43,226 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:11:43,226 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 23:11:43,480 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 [2023-11-06 23:11:43,488 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 15 treesize of output 1 [2023-11-06 23:11:43,883 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 25 treesize of output 13 [2023-11-06 23:11:43,887 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2023-11-06 23:11:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 82 proven. 781 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-11-06 23:11:44,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 82 proven. 765 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-06 23:11:45,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677507555] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:45,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:45,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 33 [2023-11-06 23:11:45,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322370204] [2023-11-06 23:11:45,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:45,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 23:11:45,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:45,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 23:11:45,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 23:11:45,576 INFO L87 Difference]: Start difference. First operand 55495 states and 63831 transitions. Second operand has 34 states, 33 states have (on average 10.878787878787879) internal successors, (359), 34 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:09,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:09,897 INFO L93 Difference]: Finished difference Result 284248 states and 322986 transitions. [2023-11-06 23:12:09,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2023-11-06 23:12:09,898 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 10.878787878787879) internal successors, (359), 34 states have internal predecessors, (359), 0 states have call successors, (0), 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 173 [2023-11-06 23:12:09,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:10,448 INFO L225 Difference]: With dead ends: 284248 [2023-11-06 23:12:10,448 INFO L226 Difference]: Without dead ends: 284248 [2023-11-06 23:12:10,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36048 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=17862, Invalid=67694, Unknown=0, NotChecked=0, Total=85556 [2023-11-06 23:12:10,451 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 5398 mSDsluCounter, 7464 mSDsCounter, 0 mSdLazyCounter, 4179 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5398 SdHoareTripleChecker+Valid, 7914 SdHoareTripleChecker+Invalid, 4430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 4179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:10,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5398 Valid, 7914 Invalid, 4430 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [251 Valid, 4179 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-06 23:12:10,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284248 states. [2023-11-06 23:12:12,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284248 to 104123. [2023-11-06 23:12:13,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104123 states, 104114 states have (on average 1.1487408033501738) internal successors, (119600), 104122 states have internal predecessors, (119600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:13,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104123 states to 104123 states and 119600 transitions. [2023-11-06 23:12:13,250 INFO L78 Accepts]: Start accepts. Automaton has 104123 states and 119600 transitions. Word has length 173 [2023-11-06 23:12:13,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:13,251 INFO L495 AbstractCegarLoop]: Abstraction has 104123 states and 119600 transitions. [2023-11-06 23:12:13,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 10.878787878787879) internal successors, (359), 34 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:13,251 INFO L276 IsEmpty]: Start isEmpty. Operand 104123 states and 119600 transitions. [2023-11-06 23:12:13,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-06 23:12:13,262 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:13,262 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 12, 12, 10, 8, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:13,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:13,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-06 23:12:13,464 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:12:13,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:13,464 INFO L85 PathProgramCache]: Analyzing trace with hash -695935548, now seen corresponding path program 2 times [2023-11-06 23:12:13,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:13,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435149415] [2023-11-06 23:12:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:13,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 56 proven. 736 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-06 23:12:14,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:14,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435149415] [2023-11-06 23:12:14,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435149415] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:14,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266110754] [2023-11-06 23:12:14,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:12:14,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:14,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:14,778 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:14,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-06 23:12:15,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:12:15,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:12:15,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 23:12:15,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:15,264 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 15 treesize of output 1 [2023-11-06 23:12:15,455 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 16 treesize of output 8 [2023-11-06 23:12:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 121 proven. 653 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-06 23:12:15,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 94 proven. 643 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-11-06 23:12:15,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266110754] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:15,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:12:15,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 11] total 24 [2023-11-06 23:12:15,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557798087] [2023-11-06 23:12:15,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:15,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 23:12:15,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:15,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 23:12:15,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2023-11-06 23:12:15,809 INFO L87 Difference]: Start difference. First operand 104123 states and 119600 transitions. Second operand has 24 states, 24 states have (on average 10.166666666666666) internal successors, (244), 24 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:21,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:21,375 INFO L93 Difference]: Finished difference Result 169662 states and 193255 transitions. [2023-11-06 23:12:21,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2023-11-06 23:12:21,376 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 10.166666666666666) internal successors, (244), 24 states have internal predecessors, (244), 0 states have call successors, (0), 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 174 [2023-11-06 23:12:21,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:21,546 INFO L225 Difference]: With dead ends: 169662 [2023-11-06 23:12:21,546 INFO L226 Difference]: Without dead ends: 169662 [2023-11-06 23:12:21,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8380 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4703, Invalid=19789, Unknown=0, NotChecked=0, Total=24492 [2023-11-06 23:12:21,548 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 1290 mSDsluCounter, 3517 mSDsCounter, 0 mSdLazyCounter, 2474 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1290 SdHoareTripleChecker+Valid, 3813 SdHoareTripleChecker+Invalid, 2532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:21,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1290 Valid, 3813 Invalid, 2532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2474 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 23:12:21,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169662 states. [2023-11-06 23:12:23,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169662 to 103780. [2023-11-06 23:12:23,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103780 states, 103771 states have (on average 1.1482398743386881) internal successors, (119154), 103779 states have internal predecessors, (119154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:23,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103780 states to 103780 states and 119154 transitions. [2023-11-06 23:12:23,365 INFO L78 Accepts]: Start accepts. Automaton has 103780 states and 119154 transitions. Word has length 174 [2023-11-06 23:12:23,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:23,366 INFO L495 AbstractCegarLoop]: Abstraction has 103780 states and 119154 transitions. [2023-11-06 23:12:23,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 10.166666666666666) internal successors, (244), 24 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:23,366 INFO L276 IsEmpty]: Start isEmpty. Operand 103780 states and 119154 transitions. [2023-11-06 23:12:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-06 23:12:23,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:23,377 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 12, 12, 10, 8, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:23,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:23,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:23,578 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:12:23,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:23,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1469366084, now seen corresponding path program 3 times [2023-11-06 23:12:23,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:23,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132131008] [2023-11-06 23:12:23,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:23,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 200 proven. 531 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-11-06 23:12:23,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:23,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132131008] [2023-11-06 23:12:23,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132131008] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:23,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967193043] [2023-11-06 23:12:23,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:12:23,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:23,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:23,797 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:23,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-06 23:12:24,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-06 23:12:24,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:12:24,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 23:12:24,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:24,492 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 6 treesize of output 5 [2023-11-06 23:12:24,575 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:12:24,575 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 23:12:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 199 proven. 532 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-11-06 23:12:24,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 199 proven. 532 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-11-06 23:12:24,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967193043] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:24,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:12:24,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2023-11-06 23:12:24,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109760660] [2023-11-06 23:12:24,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:24,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:12:24,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:24,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:12:24,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:12:24,891 INFO L87 Difference]: Start difference. First operand 103780 states and 119154 transitions. Second operand has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:25,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:25,433 INFO L93 Difference]: Finished difference Result 144401 states and 164870 transitions. [2023-11-06 23:12:25,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:12:25,437 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2023-11-06 23:12:25,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:25,897 INFO L225 Difference]: With dead ends: 144401 [2023-11-06 23:12:25,897 INFO L226 Difference]: Without dead ends: 144401 [2023-11-06 23:12:25,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2023-11-06 23:12:25,898 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 342 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:25,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 665 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:12:25,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144401 states. [2023-11-06 23:12:27,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144401 to 122036. [2023-11-06 23:12:27,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122036 states, 122027 states have (on average 1.1437796553221828) internal successors, (139572), 122035 states have internal predecessors, (139572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:27,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122036 states to 122036 states and 139572 transitions. [2023-11-06 23:12:27,892 INFO L78 Accepts]: Start accepts. Automaton has 122036 states and 139572 transitions. Word has length 174 [2023-11-06 23:12:27,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:27,892 INFO L495 AbstractCegarLoop]: Abstraction has 122036 states and 139572 transitions. [2023-11-06 23:12:27,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:27,892 INFO L276 IsEmpty]: Start isEmpty. Operand 122036 states and 139572 transitions. [2023-11-06 23:12:27,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-06 23:12:27,899 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:27,900 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 12, 12, 10, 8, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:27,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:28,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:28,100 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:12:28,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:28,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2129791236, now seen corresponding path program 4 times [2023-11-06 23:12:28,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:28,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88696820] [2023-11-06 23:12:28,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:28,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 200 proven. 523 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-06 23:12:28,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:28,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88696820] [2023-11-06 23:12:28,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88696820] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:28,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435865378] [2023-11-06 23:12:28,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:12:28,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:28,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:28,319 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:28,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-06 23:12:28,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:12:28,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:12:28,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:12:28,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:28,598 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 6 treesize of output 5 [2023-11-06 23:12:28,677 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:12:28,677 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 23:12:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 199 proven. 524 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-06 23:12:28,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 199 proven. 524 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-06 23:12:28,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435865378] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:28,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:12:28,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2023-11-06 23:12:28,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143783088] [2023-11-06 23:12:28,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:28,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:12:28,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:28,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:12:28,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:12:28,986 INFO L87 Difference]: Start difference. First operand 122036 states and 139572 transitions. Second operand has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:29,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:29,973 INFO L93 Difference]: Finished difference Result 162721 states and 185479 transitions. [2023-11-06 23:12:29,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 23:12:29,974 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 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 174 [2023-11-06 23:12:29,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:30,136 INFO L225 Difference]: With dead ends: 162721 [2023-11-06 23:12:30,136 INFO L226 Difference]: Without dead ends: 162721 [2023-11-06 23:12:30,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:12:30,136 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 410 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:30,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 659 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:12:30,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162721 states. [2023-11-06 23:12:31,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162721 to 96289. [2023-11-06 23:12:31,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96289 states, 96280 states have (on average 1.1469983381803075) internal successors, (110433), 96288 states have internal predecessors, (110433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:32,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96289 states to 96289 states and 110433 transitions. [2023-11-06 23:12:32,088 INFO L78 Accepts]: Start accepts. Automaton has 96289 states and 110433 transitions. Word has length 174 [2023-11-06 23:12:32,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:32,089 INFO L495 AbstractCegarLoop]: Abstraction has 96289 states and 110433 transitions. [2023-11-06 23:12:32,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:32,090 INFO L276 IsEmpty]: Start isEmpty. Operand 96289 states and 110433 transitions. [2023-11-06 23:12:32,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-06 23:12:32,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:32,096 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 12, 12, 10, 8, 7, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:32,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:32,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:32,297 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:12:32,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:32,297 INFO L85 PathProgramCache]: Analyzing trace with hash -668697579, now seen corresponding path program 1 times [2023-11-06 23:12:32,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:32,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571816310] [2023-11-06 23:12:32,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:32,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 372 proven. 311 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-11-06 23:12:32,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:32,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571816310] [2023-11-06 23:12:32,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571816310] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:32,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621622080] [2023-11-06 23:12:32,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:32,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:32,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:32,563 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:32,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-06 23:12:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:32,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 23:12:32,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 554 proven. 19 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2023-11-06 23:12:32,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:32,972 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 554 proven. 19 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2023-11-06 23:12:32,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621622080] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:32,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:12:32,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-11-06 23:12:32,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680611427] [2023-11-06 23:12:32,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:32,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:12:32,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:32,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:12:32,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:12:32,974 INFO L87 Difference]: Start difference. First operand 96289 states and 110433 transitions. Second operand has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 14 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:33,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:33,778 INFO L93 Difference]: Finished difference Result 31452 states and 35824 transitions. [2023-11-06 23:12:33,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 23:12:33,778 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 14 states have internal predecessors, (162), 0 states have call successors, (0), 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 178 [2023-11-06 23:12:33,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:33,802 INFO L225 Difference]: With dead ends: 31452 [2023-11-06 23:12:33,803 INFO L226 Difference]: Without dead ends: 31452 [2023-11-06 23:12:33,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=318, Invalid=1844, Unknown=0, NotChecked=0, Total=2162 [2023-11-06 23:12:33,803 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 254 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 1692 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:33,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 1692 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:12:33,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31452 states. [2023-11-06 23:12:34,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31452 to 11805. [2023-11-06 23:12:34,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11805 states, 11796 states have (on average 1.1378433367243133) internal successors, (13422), 11804 states have internal predecessors, (13422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:34,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11805 states to 11805 states and 13422 transitions. [2023-11-06 23:12:34,278 INFO L78 Accepts]: Start accepts. Automaton has 11805 states and 13422 transitions. Word has length 178 [2023-11-06 23:12:34,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:34,279 INFO L495 AbstractCegarLoop]: Abstraction has 11805 states and 13422 transitions. [2023-11-06 23:12:34,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 14 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:34,279 INFO L276 IsEmpty]: Start isEmpty. Operand 11805 states and 13422 transitions. [2023-11-06 23:12:34,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-11-06 23:12:34,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:34,282 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 13, 13, 10, 8, 8, 7, 6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:34,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:34,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:34,483 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:12:34,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:34,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1498211354, now seen corresponding path program 5 times [2023-11-06 23:12:34,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:34,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409191410] [2023-11-06 23:12:34,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:34,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 286 proven. 800 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-11-06 23:12:35,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:35,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409191410] [2023-11-06 23:12:35,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409191410] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:35,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672800197] [2023-11-06 23:12:35,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:12:35,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:35,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:35,853 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:35,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-06 23:12:37,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-11-06 23:12:37,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:12:37,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 23:12:37,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:37,680 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:12:37,820 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 23:12:37,820 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 14 treesize of output 13 [2023-11-06 23:12:37,982 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 15 treesize of output 1 [2023-11-06 23:12:38,160 INFO L322 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2023-11-06 23:12:38,161 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 36 [2023-11-06 23:12:38,203 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 [2023-11-06 23:12:38,219 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 [2023-11-06 23:12:38,365 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 17 treesize of output 9 [2023-11-06 23:12:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 283 proven. 807 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-11-06 23:12:38,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:41,179 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:12:41,180 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 27 treesize of output 28 [2023-11-06 23:12:41,186 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 46 treesize of output 34 [2023-11-06 23:12:41,191 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 16 treesize of output 12 [2023-11-06 23:12:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 231 proven. 823 refuted. 57 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-06 23:12:43,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672800197] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:43,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:12:43,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 15] total 34 [2023-11-06 23:12:43,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7555282] [2023-11-06 23:12:43,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:43,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 23:12:43,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:43,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 23:12:43,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1054, Unknown=3, NotChecked=0, Total=1190 [2023-11-06 23:12:43,943 INFO L87 Difference]: Start difference. First operand 11805 states and 13422 transitions. Second operand has 35 states, 34 states have (on average 9.205882352941176) internal successors, (313), 35 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:49,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:49,557 INFO L93 Difference]: Finished difference Result 27794 states and 31282 transitions. [2023-11-06 23:12:49,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-11-06 23:12:49,557 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 9.205882352941176) internal successors, (313), 35 states have internal predecessors, (313), 0 states have call successors, (0), 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 192 [2023-11-06 23:12:49,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:49,579 INFO L225 Difference]: With dead ends: 27794 [2023-11-06 23:12:49,579 INFO L226 Difference]: Without dead ends: 27794 [2023-11-06 23:12:49,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 416 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2633 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2348, Invalid=7749, Unknown=3, NotChecked=0, Total=10100 [2023-11-06 23:12:49,580 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 2001 mSDsluCounter, 5355 mSDsCounter, 0 mSdLazyCounter, 3022 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2001 SdHoareTripleChecker+Valid, 5750 SdHoareTripleChecker+Invalid, 3108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:49,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2001 Valid, 5750 Invalid, 3108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3022 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-06 23:12:49,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27794 states. [2023-11-06 23:12:49,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27794 to 11461. [2023-11-06 23:12:49,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11461 states, 11452 states have (on average 1.135784142507859) internal successors, (13007), 11460 states have internal predecessors, (13007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:49,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11461 states to 11461 states and 13007 transitions. [2023-11-06 23:12:49,796 INFO L78 Accepts]: Start accepts. Automaton has 11461 states and 13007 transitions. Word has length 192 [2023-11-06 23:12:49,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:49,796 INFO L495 AbstractCegarLoop]: Abstraction has 11461 states and 13007 transitions. [2023-11-06 23:12:49,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 9.205882352941176) internal successors, (313), 35 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:49,796 INFO L276 IsEmpty]: Start isEmpty. Operand 11461 states and 13007 transitions. [2023-11-06 23:12:49,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-11-06 23:12:49,799 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:49,799 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 13, 13, 10, 8, 8, 7, 6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:49,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-06 23:12:50,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-06 23:12:50,000 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 23:12:50,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:50,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1867130138, now seen corresponding path program 6 times [2023-11-06 23:12:50,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:50,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408770590] [2023-11-06 23:12:50,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:50,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:51,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 285 proven. 803 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-06 23:12:51,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:51,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408770590] [2023-11-06 23:12:51,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408770590] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:51,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811555790] [2023-11-06 23:12:51,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:12:51,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:51,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:51,283 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:51,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5eca84-0a78-41de-8234-1be9f2522325/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-06 23:12:51,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-11-06 23:12:51,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:12:51,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 23:12:51,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:51,959 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:12:52,048 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 23:12:52,048 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 14 treesize of output 13 [2023-11-06 23:12:52,244 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 19 treesize of output 1 [2023-11-06 23:12:52,478 INFO L322 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2023-11-06 23:12:52,478 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 45 [2023-11-06 23:12:52,544 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 30 treesize of output 23 [2023-11-06 23:12:52,562 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 30 treesize of output 23 [2023-11-06 23:12:52,866 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:12:52,867 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 31 treesize of output 25 [2023-11-06 23:12:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 448 proven. 662 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-06 23:12:54,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:54,948 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:12:54,948 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 27 treesize of output 28 [2023-11-06 23:12:54,954 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 46 treesize of output 34 [2023-11-06 23:12:54,963 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 16 treesize of output 12 [2023-11-06 23:12:56,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 225 proven. 885 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-06 23:12:56,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811555790] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:56,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:12:56,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 42 [2023-11-06 23:12:56,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534830495] [2023-11-06 23:12:56,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:56,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-06 23:12:56,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:56,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-06 23:12:56,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1592, Unknown=1, NotChecked=0, Total=1806 [2023-11-06 23:12:56,839 INFO L87 Difference]: Start difference. First operand 11461 states and 13007 transitions. Second operand has 43 states, 42 states have (on average 9.404761904761905) internal successors, (395), 43 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)