./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.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_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/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_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/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_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/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 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:17:26,266 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:17:26,379 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:17:26,386 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:17:26,387 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:17:26,418 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:17:26,419 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:17:26,419 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:17:26,420 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:17:26,421 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:17:26,422 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:17:26,423 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:17:26,423 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:17:26,424 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:17:26,425 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:17:26,425 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:17:26,426 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:17:26,426 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:17:26,427 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:17:26,431 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:17:26,432 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:17:26,432 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:17:26,433 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:17:26,433 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:17:26,434 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:17:26,434 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:17:26,436 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:17:26,436 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:17:26,437 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:17:26,437 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:17:26,439 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:17:26,439 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:17:26,439 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:17:26,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:17:26,440 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:17:26,440 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:17:26,441 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:17:26,441 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:17:26,441 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_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 [2023-11-06 22:17:26,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:17:26,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:17:26,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:17:26,837 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:17:26,839 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:17:26,840 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2023-11-06 22:17:30,208 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:17:30,436 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:17:30,437 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2023-11-06 22:17:30,447 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/data/ddbd16946/4a2f3d2bd9db459f9ff220804b1ddcd5/FLAGc4e458bfd [2023-11-06 22:17:30,465 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/data/ddbd16946/4a2f3d2bd9db459f9ff220804b1ddcd5 [2023-11-06 22:17:30,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:17:30,471 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:17:30,473 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:17:30,473 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:17:30,482 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:17:30,487 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:17:30" (1/1) ... [2023-11-06 22:17:30,490 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ef935aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:30, skipping insertion in model container [2023-11-06 22:17:30,491 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:17:30" (1/1) ... [2023-11-06 22:17:30,523 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:17:30,710 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:17:30,722 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:17:30,744 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:17:30,763 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:17:30,763 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:30 WrapperNode [2023-11-06 22:17:30,764 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:17:30,765 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:17:30,765 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:17:30,766 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:17:30,774 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:30" (1/1) ... [2023-11-06 22:17:30,781 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:30" (1/1) ... [2023-11-06 22:17:30,806 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 67 [2023-11-06 22:17:30,807 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:17:30,808 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:17:30,808 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:17:30,808 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:17:30,819 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:30" (1/1) ... [2023-11-06 22:17:30,819 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:30" (1/1) ... [2023-11-06 22:17:30,822 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:30" (1/1) ... [2023-11-06 22:17:30,822 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:30" (1/1) ... [2023-11-06 22:17:30,830 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:30" (1/1) ... [2023-11-06 22:17:30,834 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:30" (1/1) ... [2023-11-06 22:17:30,836 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:30" (1/1) ... [2023-11-06 22:17:30,837 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:30" (1/1) ... [2023-11-06 22:17:30,840 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:17:30,841 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:17:30,841 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:17:30,841 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:17:30,842 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:30" (1/1) ... [2023-11-06 22:17:30,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:17:30,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:30,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:17:30,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:17:30,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:17:30,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:17:30,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:17:30,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:17:30,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:17:30,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:17:30,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:17:30,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:17:31,014 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:17:31,016 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:17:31,259 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:17:31,266 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:17:31,267 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:17:31,270 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:17:31 BoogieIcfgContainer [2023-11-06 22:17:31,271 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:17:31,276 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:17:31,277 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:17:31,281 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:17:31,281 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:17:30" (1/3) ... [2023-11-06 22:17:31,298 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54951b43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:17:31, skipping insertion in model container [2023-11-06 22:17:31,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:30" (2/3) ... [2023-11-06 22:17:31,302 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54951b43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:17:31, skipping insertion in model container [2023-11-06 22:17:31,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:17:31" (3/3) ... [2023-11-06 22:17:31,304 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-1.i [2023-11-06 22:17:31,323 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:17:31,323 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-06 22:17:31,392 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:17:31,406 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;@290d7cea, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:17:31,407 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-11-06 22:17:31,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:31,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 22:17:31,420 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:31,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 22:17:31,424 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-06 22:17:31,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:31,432 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2023-11-06 22:17:31,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:31,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894108973] [2023-11-06 22:17:31,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:31,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:31,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:31,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894108973] [2023-11-06 22:17:31,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894108973] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:31,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:17:31,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:17:31,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470796616] [2023-11-06 22:17:31,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:31,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:17:31,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:31,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:17:31,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:31,838 INFO L87 Difference]: Start difference. First operand has 44 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:31,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:31,909 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2023-11-06 22:17:31,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:17:31,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-06 22:17:31,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:31,930 INFO L225 Difference]: With dead ends: 38 [2023-11-06 22:17:31,930 INFO L226 Difference]: Without dead ends: 36 [2023-11-06 22:17:31,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:31,941 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 33 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:31,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:17:31,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-06 22:17:31,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-06 22:17:31,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.52) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2023-11-06 22:17:31,988 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 4 [2023-11-06 22:17:31,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:31,990 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2023-11-06 22:17:31,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:31,990 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2023-11-06 22:17:31,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 22:17:31,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:31,991 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 22:17:31,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:17:31,993 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-06 22:17:31,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:31,994 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2023-11-06 22:17:31,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:31,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643349987] [2023-11-06 22:17:31,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:31,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:32,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:32,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643349987] [2023-11-06 22:17:32,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643349987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:32,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:17:32,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:17:32,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427223987] [2023-11-06 22:17:32,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:32,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:17:32,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:32,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:17:32,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:32,364 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:32,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:32,426 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2023-11-06 22:17:32,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:17:32,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-06 22:17:32,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:32,428 INFO L225 Difference]: With dead ends: 40 [2023-11-06 22:17:32,428 INFO L226 Difference]: Without dead ends: 40 [2023-11-06 22:17:32,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:32,430 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:32,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 49 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:17:32,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-06 22:17:32,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2023-11-06 22:17:32,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:32,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2023-11-06 22:17:32,439 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 4 [2023-11-06 22:17:32,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:32,439 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2023-11-06 22:17:32,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:32,440 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2023-11-06 22:17:32,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 22:17:32,440 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:32,441 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:32,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:17:32,441 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-06 22:17:32,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:32,442 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2023-11-06 22:17:32,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:32,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490545354] [2023-11-06 22:17:32,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:32,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:32,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:32,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:32,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490545354] [2023-11-06 22:17:32,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490545354] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:32,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660818155] [2023-11-06 22:17:32,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:32,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:32,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:32,727 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:32,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:17:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:32,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:17:32,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:32,994 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:17:32,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:17:33,004 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-06 22:17:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:33,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:33,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660818155] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:33,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:17:33,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:17:33,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078523006] [2023-11-06 22:17:33,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:33,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:17:33,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:33,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:17:33,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:17:33,264 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:33,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:33,451 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2023-11-06 22:17:33,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:17:33,453 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-06 22:17:33,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:33,460 INFO L225 Difference]: With dead ends: 50 [2023-11-06 22:17:33,461 INFO L226 Difference]: Without dead ends: 50 [2023-11-06 22:17:33,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:17:33,468 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:33,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 54 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:17:33,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-06 22:17:33,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2023-11-06 22:17:33,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 47 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 22:17:33,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2023-11-06 22:17:33,483 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 8 [2023-11-06 22:17:33,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:33,483 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2023-11-06 22:17:33,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:33,485 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2023-11-06 22:17:33,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-06 22:17:33,486 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:33,486 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-06 22:17:33,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:33,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:33,695 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-06 22:17:33,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:33,696 INFO L85 PathProgramCache]: Analyzing trace with hash -4646106, now seen corresponding path program 1 times [2023-11-06 22:17:33,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:33,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860980125] [2023-11-06 22:17:33,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:33,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:17:33,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:33,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860980125] [2023-11-06 22:17:33,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860980125] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:33,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298561067] [2023-11-06 22:17:33,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:33,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:33,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:33,911 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:33,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:17:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:33,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:17:33,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:34,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:34,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298561067] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:34,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:17:34,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2023-11-06 22:17:34,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913500527] [2023-11-06 22:17:34,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:34,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:17:34,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:34,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:17:34,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:17:34,126 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:34,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:34,539 INFO L93 Difference]: Finished difference Result 210 states and 218 transitions. [2023-11-06 22:17:34,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:17:34,540 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-06 22:17:34,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:34,547 INFO L225 Difference]: With dead ends: 210 [2023-11-06 22:17:34,547 INFO L226 Difference]: Without dead ends: 210 [2023-11-06 22:17:34,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:17:34,551 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 412 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:34,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 107 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:17:34,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-11-06 22:17:34,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 57. [2023-11-06 22:17:34,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.25) internal successors, (60), 56 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:34,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2023-11-06 22:17:34,563 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 13 [2023-11-06 22:17:34,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:34,563 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2023-11-06 22:17:34,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:34,564 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2023-11-06 22:17:34,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 22:17:34,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:34,565 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2023-11-06 22:17:34,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:34,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:34,772 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-06 22:17:34,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:34,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2023-11-06 22:17:34,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:34,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97129181] [2023-11-06 22:17:34,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:34,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:34,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:35,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:35,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97129181] [2023-11-06 22:17:35,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97129181] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:35,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22735475] [2023-11-06 22:17:35,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:17:35,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:35,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:35,074 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:35,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:17:35,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:17:35,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:17:35,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:17:35,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:35,231 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:17:35,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:17:35,241 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-06 22:17:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:35,510 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:17:35,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22735475] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:35,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:17:35,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2023-11-06 22:17:35,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582208777] [2023-11-06 22:17:35,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:35,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:17:35,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:35,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:17:35,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:17:35,512 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:35,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:35,781 INFO L93 Difference]: Finished difference Result 142 states and 158 transitions. [2023-11-06 22:17:35,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:17:35,782 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-06 22:17:35,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:35,783 INFO L225 Difference]: With dead ends: 142 [2023-11-06 22:17:35,783 INFO L226 Difference]: Without dead ends: 142 [2023-11-06 22:17:35,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:17:35,785 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 104 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:35,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 179 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:17:35,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-06 22:17:35,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 56. [2023-11-06 22:17:35,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 55 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:35,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2023-11-06 22:17:35,793 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 20 [2023-11-06 22:17:35,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:35,793 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2023-11-06 22:17:35,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:35,794 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2023-11-06 22:17:35,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 22:17:35,795 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:35,795 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:35,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:36,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:36,002 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-06 22:17:36,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:36,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1934674516, now seen corresponding path program 1 times [2023-11-06 22:17:36,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:36,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993674193] [2023-11-06 22:17:36,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:36,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-06 22:17:36,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:36,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993674193] [2023-11-06 22:17:36,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993674193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:36,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:17:36,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:17:36,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893584365] [2023-11-06 22:17:36,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:36,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:17:36,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:36,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:17:36,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:36,128 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:36,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:36,148 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2023-11-06 22:17:36,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:17:36,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-06 22:17:36,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:36,150 INFO L225 Difference]: With dead ends: 54 [2023-11-06 22:17:36,150 INFO L226 Difference]: Without dead ends: 54 [2023-11-06 22:17:36,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:36,152 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:36,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:17:36,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-06 22:17:36,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-06 22:17:36,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:36,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2023-11-06 22:17:36,166 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 32 [2023-11-06 22:17:36,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:36,166 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2023-11-06 22:17:36,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:36,167 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2023-11-06 22:17:36,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 22:17:36,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:36,168 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:36,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:17:36,168 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-06 22:17:36,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:36,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1934674515, now seen corresponding path program 1 times [2023-11-06 22:17:36,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:36,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902369513] [2023-11-06 22:17:36,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:36,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-06 22:17:36,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:36,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902369513] [2023-11-06 22:17:36,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902369513] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:36,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:17:36,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:17:36,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800888926] [2023-11-06 22:17:36,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:36,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:17:36,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:36,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:17:36,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:17:36,367 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:36,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:36,424 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2023-11-06 22:17:36,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:17:36,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-06 22:17:36,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:36,428 INFO L225 Difference]: With dead ends: 70 [2023-11-06 22:17:36,428 INFO L226 Difference]: Without dead ends: 70 [2023-11-06 22:17:36,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:17:36,430 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:36,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 30 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:17:36,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-06 22:17:36,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2023-11-06 22:17:36,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 58 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:36,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2023-11-06 22:17:36,443 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 32 [2023-11-06 22:17:36,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:36,443 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2023-11-06 22:17:36,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:36,444 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2023-11-06 22:17:36,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-06 22:17:36,445 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:36,446 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:36,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:17:36,446 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-06 22:17:36,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:36,447 INFO L85 PathProgramCache]: Analyzing trace with hash 498629567, now seen corresponding path program 1 times [2023-11-06 22:17:36,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:36,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849541803] [2023-11-06 22:17:36,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:36,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:17:36,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:36,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849541803] [2023-11-06 22:17:36,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849541803] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:36,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133764831] [2023-11-06 22:17:36,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:36,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:36,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:36,707 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:36,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:17:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:36,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:17:36,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:17:36,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:17:37,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133764831] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:37,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:17:37,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-11-06 22:17:37,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735556729] [2023-11-06 22:17:37,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:37,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:17:37,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:37,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:17:37,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:17:37,033 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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 22:17:37,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:37,549 INFO L93 Difference]: Finished difference Result 416 states and 432 transitions. [2023-11-06 22:17:37,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:17:37,550 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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 34 [2023-11-06 22:17:37,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:37,553 INFO L225 Difference]: With dead ends: 416 [2023-11-06 22:17:37,553 INFO L226 Difference]: Without dead ends: 416 [2023-11-06 22:17:37,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:17:37,554 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 786 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:37,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [786 Valid, 202 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:17:37,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2023-11-06 22:17:37,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 91. [2023-11-06 22:17:37,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 90 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:37,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2023-11-06 22:17:37,564 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 34 [2023-11-06 22:17:37,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:37,564 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2023-11-06 22:17:37,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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 22:17:37,565 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2023-11-06 22:17:37,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-06 22:17:37,568 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:37,568 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:37,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-06 22:17:37,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:37,775 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-06 22:17:37,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:37,775 INFO L85 PathProgramCache]: Analyzing trace with hash -618447913, now seen corresponding path program 2 times [2023-11-06 22:17:37,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:37,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961419419] [2023-11-06 22:17:37,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:37,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:17:38,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:38,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961419419] [2023-11-06 22:17:38,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961419419] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:38,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884631387] [2023-11-06 22:17:38,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:17:38,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:38,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:38,246 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:38,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:17:38,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:17:38,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:17:38,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:17:38,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:17:38,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:17:39,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884631387] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:39,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:17:39,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-11-06 22:17:39,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338743957] [2023-11-06 22:17:39,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:39,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 22:17:39,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:39,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 22:17:39,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 22:17:39,027 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:40,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:40,348 INFO L93 Difference]: Finished difference Result 864 states and 896 transitions. [2023-11-06 22:17:40,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 22:17:40,349 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 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 66 [2023-11-06 22:17:40,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:40,357 INFO L225 Difference]: With dead ends: 864 [2023-11-06 22:17:40,357 INFO L226 Difference]: Without dead ends: 864 [2023-11-06 22:17:40,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 22:17:40,361 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1758 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1758 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:40,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1758 Valid, 424 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:17:40,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2023-11-06 22:17:40,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 155. [2023-11-06 22:17:40,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 149 states have (on average 1.0671140939597314) internal successors, (159), 154 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:40,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 159 transitions. [2023-11-06 22:17:40,383 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 159 transitions. Word has length 66 [2023-11-06 22:17:40,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:40,386 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 159 transitions. [2023-11-06 22:17:40,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:40,386 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 159 transitions. [2023-11-06 22:17:40,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-06 22:17:40,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:40,396 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:40,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:40,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:40,602 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-06 22:17:40,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:40,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1529191431, now seen corresponding path program 3 times [2023-11-06 22:17:40,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:40,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471627584] [2023-11-06 22:17:40,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:40,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:42,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:17:42,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:42,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471627584] [2023-11-06 22:17:42,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471627584] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:42,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975586026] [2023-11-06 22:17:42,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:17:42,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:42,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:42,336 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:42,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:17:42,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:17:42,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:17:42,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:17:42,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:42,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 88 proven. 1 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2023-11-06 22:17:42,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:43,234 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-06 22:17:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2023-11-06 22:17:43,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975586026] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:43,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:17:43,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 7, 7] total 45 [2023-11-06 22:17:43,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775774695] [2023-11-06 22:17:43,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:43,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-06 22:17:43,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:43,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-06 22:17:43,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=714, Invalid=1266, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 22:17:43,489 INFO L87 Difference]: Start difference. First operand 155 states and 159 transitions. Second operand has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 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 22:17:47,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:47,030 INFO L93 Difference]: Finished difference Result 865 states and 902 transitions. [2023-11-06 22:17:47,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-06 22:17:47,031 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 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 130 [2023-11-06 22:17:47,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:47,037 INFO L225 Difference]: With dead ends: 865 [2023-11-06 22:17:47,037 INFO L226 Difference]: Without dead ends: 865 [2023-11-06 22:17:47,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2133, Invalid=3873, Unknown=0, NotChecked=0, Total=6006 [2023-11-06 22:17:47,041 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6545 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 704 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6545 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 704 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:47,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6545 Valid, 445 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [704 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 22:17:47,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2023-11-06 22:17:47,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 538. [2023-11-06 22:17:47,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 532 states have (on average 1.3120300751879699) internal successors, (698), 537 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:47,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 698 transitions. [2023-11-06 22:17:47,071 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 698 transitions. Word has length 130 [2023-11-06 22:17:47,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:47,071 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 698 transitions. [2023-11-06 22:17:47,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 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 22:17:47,072 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 698 transitions. [2023-11-06 22:17:47,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-06 22:17:47,074 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:47,074 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:47,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:47,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:17:47,278 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-06 22:17:47,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:47,279 INFO L85 PathProgramCache]: Analyzing trace with hash 730106369, now seen corresponding path program 1 times [2023-11-06 22:17:47,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:47,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817916334] [2023-11-06 22:17:47,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:47,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:48,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:48,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:48,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817916334] [2023-11-06 22:17:48,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817916334] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:48,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440867414] [2023-11-06 22:17:48,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:48,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:48,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:48,707 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:48,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:17:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:48,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 22:17:48,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:49,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:50,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440867414] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:50,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:17:50,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 67 [2023-11-06 22:17:50,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142518153] [2023-11-06 22:17:50,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:50,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-11-06 22:17:50,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:50,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-11-06 22:17:50,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2023-11-06 22:17:50,979 INFO L87 Difference]: Start difference. First operand 538 states and 698 transitions. Second operand has 67 states, 67 states have (on average 3.970149253731343) internal successors, (266), 67 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:56,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:56,021 INFO L93 Difference]: Finished difference Result 1752 states and 1818 transitions. [2023-11-06 22:17:56,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-06 22:17:56,022 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.970149253731343) internal successors, (266), 67 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2023-11-06 22:17:56,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:56,031 INFO L225 Difference]: With dead ends: 1752 [2023-11-06 22:17:56,032 INFO L226 Difference]: Without dead ends: 1752 [2023-11-06 22:17:56,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2023-11-06 22:17:56,035 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 4472 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 946 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4472 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 1866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 946 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:56,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4472 Valid, 856 Invalid, 1866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [946 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-06 22:17:56,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2023-11-06 22:17:56,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 670. [2023-11-06 22:17:56,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 664 states have (on average 1.25) internal successors, (830), 669 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:56,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 830 transitions. [2023-11-06 22:17:56,062 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 830 transitions. Word has length 135 [2023-11-06 22:17:56,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:56,063 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 830 transitions. [2023-11-06 22:17:56,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.970149253731343) internal successors, (266), 67 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:56,063 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 830 transitions. [2023-11-06 22:17:56,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-11-06 22:17:56,067 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:56,067 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:56,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-06 22:17:56,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:17:56,274 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-06 22:17:56,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:56,275 INFO L85 PathProgramCache]: Analyzing trace with hash -156263874, now seen corresponding path program 2 times [2023-11-06 22:17:56,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:56,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850141276] [2023-11-06 22:17:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:56,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:01,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:01,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:01,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850141276] [2023-11-06 22:18:01,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850141276] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:01,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810427970] [2023-11-06 22:18:01,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:18:01,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:01,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:01,310 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:01,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:18:01,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:18:01,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:01,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:18:01,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-11-06 22:18:08,297 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:18:08,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810427970] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:08,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:18:08,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [67] total 69 [2023-11-06 22:18:08,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301568439] [2023-11-06 22:18:08,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:08,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:18:08,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:08,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:18:08,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2023-11-06 22:18:08,302 INFO L87 Difference]: Start difference. First operand 670 states and 830 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:08,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:08,426 INFO L93 Difference]: Finished difference Result 669 states and 829 transitions. [2023-11-06 22:18:08,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:18:08,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 267 [2023-11-06 22:18:08,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:08,431 INFO L225 Difference]: With dead ends: 669 [2023-11-06 22:18:08,431 INFO L226 Difference]: Without dead ends: 667 [2023-11-06 22:18:08,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2023-11-06 22:18:08,434 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:08,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 38 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 1 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:18:08,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2023-11-06 22:18:08,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 667. [2023-11-06 22:18:08,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 662 states have (on average 1.200906344410876) internal successors, (795), 666 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:08,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 795 transitions. [2023-11-06 22:18:08,450 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 795 transitions. Word has length 267 [2023-11-06 22:18:08,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:08,451 INFO L495 AbstractCegarLoop]: Abstraction has 667 states and 795 transitions. [2023-11-06 22:18:08,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:08,451 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 795 transitions. [2023-11-06 22:18:08,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-11-06 22:18:08,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:08,456 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:08,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:08,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:18:08,679 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-06 22:18:08,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:08,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1298464006, now seen corresponding path program 1 times [2023-11-06 22:18:08,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:08,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990716745] [2023-11-06 22:18:08,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:08,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:18:13,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:13,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990716745] [2023-11-06 22:18:13,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990716745] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:13,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080791445] [2023-11-06 22:18:13,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:13,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:13,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:13,353 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:13,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:18:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:13,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-06 22:18:13,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:18:14,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:20,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:18:20,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080791445] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:20,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:20,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 133 [2023-11-06 22:18:20,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663498708] [2023-11-06 22:18:20,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:20,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2023-11-06 22:18:20,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:20,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2023-11-06 22:18:20,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2023-11-06 22:18:20,149 INFO L87 Difference]: Start difference. First operand 667 states and 795 transitions. Second operand has 133 states, 133 states have (on average 3.9774436090225564) internal successors, (529), 133 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:53,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:53,211 INFO L93 Difference]: Finished difference Result 3207 states and 3339 transitions. [2023-11-06 22:18:53,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-11-06 22:18:53,212 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 3.9774436090225564) internal successors, (529), 133 states have internal predecessors, (529), 0 states have call successors, (0), 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 269 [2023-11-06 22:18:53,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:53,226 INFO L225 Difference]: With dead ends: 3207 [2023-11-06 22:18:53,226 INFO L226 Difference]: Without dead ends: 3207 [2023-11-06 22:18:53,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2023-11-06 22:18:53,232 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 11573 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 2186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11573 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 4109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2186 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:53,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11573 Valid, 1331 Invalid, 4109 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2186 Valid, 1923 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-06 22:18:53,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2023-11-06 22:18:53,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 931. [2023-11-06 22:18:53,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 926 states have (on average 1.1436285097192225) internal successors, (1059), 930 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1059 transitions. [2023-11-06 22:18:53,264 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1059 transitions. Word has length 269 [2023-11-06 22:18:53,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:53,264 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 1059 transitions. [2023-11-06 22:18:53,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 3.9774436090225564) internal successors, (529), 133 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:53,265 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1059 transitions. [2023-11-06 22:18:53,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2023-11-06 22:18:53,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:53,276 INFO L195 NwaCegarLoop]: trace histogram [130, 130, 130, 130, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:53,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:53,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:18:53,484 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-06 22:18:53,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:53,484 INFO L85 PathProgramCache]: Analyzing trace with hash 470641012, now seen corresponding path program 2 times [2023-11-06 22:18:53,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:53,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549431424] [2023-11-06 22:18:53,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:53,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 33674 backedges. 0 proven. 33670 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:19:08,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:08,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549431424] [2023-11-06 22:19:08,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549431424] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:08,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585434156] [2023-11-06 22:19:08,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:19:08,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:08,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:08,559 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:08,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:19:08,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:19:08,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:08,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:19:08,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:08,811 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 22:19:08,822 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:19:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 33674 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33671 trivial. 0 not checked. [2023-11-06 22:19:15,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 33674 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33671 trivial. 0 not checked. [2023-11-06 22:19:26,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585434156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:26,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:26,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 3, 3] total 137 [2023-11-06 22:19:26,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794935897] [2023-11-06 22:19:26,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:26,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2023-11-06 22:19:26,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:26,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2023-11-06 22:19:26,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8788, Invalid=9844, Unknown=0, NotChecked=0, Total=18632 [2023-11-06 22:19:26,678 INFO L87 Difference]: Start difference. First operand 931 states and 1059 transitions. Second operand has 137 states, 137 states have (on average 4.102189781021898) internal successors, (562), 137 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:36,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:20:36,754 INFO L93 Difference]: Finished difference Result 2980 states and 3114 transitions. [2023-11-06 22:20:36,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 267 states. [2023-11-06 22:20:36,755 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 4.102189781021898) internal successors, (562), 137 states have internal predecessors, (562), 0 states have call successors, (0), 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 533 [2023-11-06 22:20:36,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:20:36,770 INFO L225 Difference]: With dead ends: 2980 [2023-11-06 22:20:36,770 INFO L226 Difference]: Without dead ends: 2980 [2023-11-06 22:20:36,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1461 GetRequests, 1062 SyntacticMatches, 0 SemanticMatches, 399 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43620 ImplicationChecksByTransitivity, 46.1s TimeCoverageRelationStatistics Valid=53602, Invalid=106798, Unknown=0, NotChecked=0, Total=160400 [2023-11-06 22:20:36,784 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 14767 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 1680 mSolverCounterSat, 2820 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14767 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 4500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2820 IncrementalHoareTripleChecker+Valid, 1680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:20:36,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14767 Valid, 1329 Invalid, 4500 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2820 Valid, 1680 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-11-06 22:20:36,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2980 states. [2023-11-06 22:20:36,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2980 to 933. [2023-11-06 22:20:36,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 930 states have (on average 1.0741935483870968) internal successors, (999), 932 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:36,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 999 transitions. [2023-11-06 22:20:36,815 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 999 transitions. Word has length 533 [2023-11-06 22:20:36,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:20:36,816 INFO L495 AbstractCegarLoop]: Abstraction has 933 states and 999 transitions. [2023-11-06 22:20:36,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 4.102189781021898) internal successors, (562), 137 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:36,817 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 999 transitions. [2023-11-06 22:20:36,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2023-11-06 22:20:36,831 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:20:36,831 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:36,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-06 22:20:37,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:20:37,038 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-06 22:20:37,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:37,039 INFO L85 PathProgramCache]: Analyzing trace with hash 311127177, now seen corresponding path program 1 times [2023-11-06 22:20:37,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:37,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446896370] [2023-11-06 22:20:37,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:37,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:52,434 INFO L134 CoverageAnalysis]: Checked inductivity of 34191 backedges. 0 proven. 34191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:52,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:52,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446896370] [2023-11-06 22:20:52,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446896370] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:20:52,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051193837] [2023-11-06 22:20:52,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:52,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:52,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:52,442 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:52,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d3b5f19-d7ea-4127-9d0f-8fd20db7ec4a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:20:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:52,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 1917 conjuncts, 133 conjunts are in the unsatisfiable core [2023-11-06 22:20:52,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 34191 backedges. 0 proven. 34191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:53,680 INFO L327 TraceCheckSpWp]: Computing backward predicates...