./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:09:55,282 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:09:55,406 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 22:09:55,421 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:09:55,422 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:09:55,462 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:09:55,463 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:09:55,464 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:09:55,465 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:09:55,471 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:09:55,472 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:09:55,473 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:09:55,473 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:09:55,475 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:09:55,476 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:09:55,476 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:09:55,477 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:09:55,477 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:09:55,478 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:09:55,478 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:09:55,478 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:09:55,479 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:09:55,480 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:09:55,480 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:09:55,480 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:09:55,481 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:09:55,482 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:09:55,482 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:09:55,483 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:09:55,483 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:09:55,485 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:09:55,485 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:09:55,485 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:09:55,486 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:09:55,486 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:09:55,486 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:09:55,486 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:09:55,487 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:09:55,487 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:09:55,487 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_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c [2023-11-21 22:09:55,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:09:55,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:09:55,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:09:55,872 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:09:55,873 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:09:55,874 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2023-11-21 22:09:59,164 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:09:59,466 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:09:59,467 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2023-11-21 22:09:59,486 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/data/4c587c865/52f1f50ac85b452f9d6b6c304cfa973e/FLAG8aa1f2702 [2023-11-21 22:09:59,501 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/data/4c587c865/52f1f50ac85b452f9d6b6c304cfa973e [2023-11-21 22:09:59,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:09:59,505 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:09:59,506 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:09:59,507 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:09:59,512 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:09:59,513 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:09:59" (1/1) ... [2023-11-21 22:09:59,514 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14e4cd12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:09:59, skipping insertion in model container [2023-11-21 22:09:59,514 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:09:59" (1/1) ... [2023-11-21 22:09:59,559 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:09:59,986 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:10:00,001 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:10:00,046 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:10:00,090 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:10:00,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:00 WrapperNode [2023-11-21 22:10:00,091 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:10:00,092 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:10:00,093 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:10:00,093 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:10:00,101 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:00" (1/1) ... [2023-11-21 22:10:00,143 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:00" (1/1) ... [2023-11-21 22:10:00,177 INFO L138 Inliner]: procedures = 168, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 99 [2023-11-21 22:10:00,177 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:10:00,178 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:10:00,178 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:10:00,178 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:10:00,189 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:00" (1/1) ... [2023-11-21 22:10:00,189 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:00" (1/1) ... [2023-11-21 22:10:00,192 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:00" (1/1) ... [2023-11-21 22:10:00,193 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:00" (1/1) ... [2023-11-21 22:10:00,206 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:00" (1/1) ... [2023-11-21 22:10:00,211 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:00" (1/1) ... [2023-11-21 22:10:00,220 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:00" (1/1) ... [2023-11-21 22:10:00,224 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:00" (1/1) ... [2023-11-21 22:10:00,227 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:10:00,228 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:10:00,228 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:10:00,229 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:10:00,230 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:00" (1/1) ... [2023-11-21 22:10:00,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:10:00,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:00,274 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:10:00,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:10:00,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 22:10:00,320 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2023-11-21 22:10:00,320 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2023-11-21 22:10:00,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 22:10:00,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:10:00,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 22:10:00,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:10:00,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-21 22:10:00,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 22:10:00,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:10:00,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:10:00,482 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:10:00,485 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:10:00,920 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:10:00,969 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:10:00,969 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 22:10:00,971 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:10:00 BoogieIcfgContainer [2023-11-21 22:10:00,971 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:10:00,973 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:10:00,974 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:10:00,977 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:10:00,977 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:09:59" (1/3) ... [2023-11-21 22:10:00,978 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7b5065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:10:00, skipping insertion in model container [2023-11-21 22:10:00,979 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:00" (2/3) ... [2023-11-21 22:10:00,979 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7b5065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:10:00, skipping insertion in model container [2023-11-21 22:10:00,980 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:10:00" (3/3) ... [2023-11-21 22:10:00,981 INFO L112 eAbstractionObserver]: Analyzing ICFG bftpd_1.i [2023-11-21 22:10:01,003 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:10:01,003 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2023-11-21 22:10:01,054 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:10:01,060 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;@427859b4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:10:01,060 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-11-21 22:10:01,065 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 59 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:10:01,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-21 22:10:01,074 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:01,075 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:10:01,075 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:01,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:01,083 INFO L85 PathProgramCache]: Analyzing trace with hash 137098440, now seen corresponding path program 1 times [2023-11-21 22:10:01,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:01,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632065777] [2023-11-21 22:10:01,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:01,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:01,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:01,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632065777] [2023-11-21 22:10:01,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632065777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:10:01,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:10:01,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:10:01,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187603288] [2023-11-21 22:10:01,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:10:01,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:10:01,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:01,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:10:01,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:10:01,548 INFO L87 Difference]: Start difference. First operand has 64 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 59 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:01,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:01,794 INFO L93 Difference]: Finished difference Result 128 states and 149 transitions. [2023-11-21 22:10:01,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:10:01,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-21 22:10:01,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:01,806 INFO L225 Difference]: With dead ends: 128 [2023-11-21 22:10:01,806 INFO L226 Difference]: Without dead ends: 125 [2023-11-21 22:10:01,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:10:01,812 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 109 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:01,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 116 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:10:01,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-21 22:10:01,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 92. [2023-11-21 22:10:01,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 82 states have internal predecessors, (104), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-21 22:10:01,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 122 transitions. [2023-11-21 22:10:01,864 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 122 transitions. Word has length 5 [2023-11-21 22:10:01,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:01,864 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 122 transitions. [2023-11-21 22:10:01,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:01,865 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 122 transitions. [2023-11-21 22:10:01,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-21 22:10:01,866 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:01,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:10:01,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:10:01,867 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:01,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:01,867 INFO L85 PathProgramCache]: Analyzing trace with hash 137098441, now seen corresponding path program 1 times [2023-11-21 22:10:01,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:01,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352919640] [2023-11-21 22:10:01,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:01,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:02,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:02,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:02,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352919640] [2023-11-21 22:10:02,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352919640] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:10:02,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:10:02,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:10:02,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751692679] [2023-11-21 22:10:02,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:10:02,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:10:02,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:02,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:10:02,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:10:02,109 INFO L87 Difference]: Start difference. First operand 92 states and 122 transitions. Second operand has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:02,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:02,307 INFO L93 Difference]: Finished difference Result 215 states and 295 transitions. [2023-11-21 22:10:02,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:10:02,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-21 22:10:02,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:02,312 INFO L225 Difference]: With dead ends: 215 [2023-11-21 22:10:02,317 INFO L226 Difference]: Without dead ends: 215 [2023-11-21 22:10:02,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:10:02,319 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 222 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:02,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 148 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:10:02,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-11-21 22:10:02,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2023-11-21 22:10:02,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 126 states have (on average 1.6904761904761905) internal successors, (213), 146 states have internal predecessors, (213), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2023-11-21 22:10:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 258 transitions. [2023-11-21 22:10:02,390 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 258 transitions. Word has length 5 [2023-11-21 22:10:02,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:02,391 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 258 transitions. [2023-11-21 22:10:02,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:02,391 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 258 transitions. [2023-11-21 22:10:02,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-21 22:10:02,392 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:02,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 22:10:02,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:10:02,393 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:02,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:02,394 INFO L85 PathProgramCache]: Analyzing trace with hash -44915675, now seen corresponding path program 1 times [2023-11-21 22:10:02,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:02,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788280900] [2023-11-21 22:10:02,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:02,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:02,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:02,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788280900] [2023-11-21 22:10:02,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788280900] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:10:02,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:10:02,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:10:02,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947292736] [2023-11-21 22:10:02,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:10:02,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:10:02,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:02,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:10:02,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:10:02,781 INFO L87 Difference]: Start difference. First operand 164 states and 258 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:03,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:03,013 INFO L93 Difference]: Finished difference Result 253 states and 364 transitions. [2023-11-21 22:10:03,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:10:03,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-21 22:10:03,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:03,019 INFO L225 Difference]: With dead ends: 253 [2023-11-21 22:10:03,019 INFO L226 Difference]: Without dead ends: 253 [2023-11-21 22:10:03,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:10:03,024 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 144 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:03,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 169 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:10:03,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-11-21 22:10:03,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2023-11-21 22:10:03,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 129 states have (on average 1.6744186046511629) internal successors, (216), 149 states have internal predecessors, (216), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2023-11-21 22:10:03,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 261 transitions. [2023-11-21 22:10:03,074 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 261 transitions. Word has length 6 [2023-11-21 22:10:03,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:03,076 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 261 transitions. [2023-11-21 22:10:03,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:03,077 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 261 transitions. [2023-11-21 22:10:03,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 22:10:03,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:03,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:03,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:10:03,084 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:03,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:03,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1392385880, now seen corresponding path program 1 times [2023-11-21 22:10:03,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:03,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178463168] [2023-11-21 22:10:03,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:03,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:03,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:03,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178463168] [2023-11-21 22:10:03,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178463168] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:10:03,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:10:03,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:10:03,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653279831] [2023-11-21 22:10:03,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:10:03,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:10:03,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:03,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:10:03,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:10:03,405 INFO L87 Difference]: Start difference. First operand 167 states and 261 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:03,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:03,597 INFO L93 Difference]: Finished difference Result 217 states and 296 transitions. [2023-11-21 22:10:03,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:10:03,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-21 22:10:03,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:03,601 INFO L225 Difference]: With dead ends: 217 [2023-11-21 22:10:03,601 INFO L226 Difference]: Without dead ends: 217 [2023-11-21 22:10:03,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:10:03,603 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 135 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:03,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 195 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:10:03,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-11-21 22:10:03,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2023-11-21 22:10:03,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 129 states have (on average 1.6589147286821706) internal successors, (214), 149 states have internal predecessors, (214), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2023-11-21 22:10:03,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 259 transitions. [2023-11-21 22:10:03,625 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 259 transitions. Word has length 7 [2023-11-21 22:10:03,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:03,626 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 259 transitions. [2023-11-21 22:10:03,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:03,626 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 259 transitions. [2023-11-21 22:10:03,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 22:10:03,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:03,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:03,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:10:03,633 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:03,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:03,633 INFO L85 PathProgramCache]: Analyzing trace with hash -214289273, now seen corresponding path program 1 times [2023-11-21 22:10:03,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:03,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008953675] [2023-11-21 22:10:03,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:03,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:03,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:03,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008953675] [2023-11-21 22:10:03,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008953675] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:10:03,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:10:03,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:10:03,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555349678] [2023-11-21 22:10:03,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:10:03,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:10:03,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:03,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:10:03,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:10:03,719 INFO L87 Difference]: Start difference. First operand 167 states and 259 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:03,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:03,853 INFO L93 Difference]: Finished difference Result 260 states and 360 transitions. [2023-11-21 22:10:03,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:10:03,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-21 22:10:03,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:03,857 INFO L225 Difference]: With dead ends: 260 [2023-11-21 22:10:03,858 INFO L226 Difference]: Without dead ends: 260 [2023-11-21 22:10:03,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:10:03,859 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 143 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:03,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 184 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:10:03,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-21 22:10:03,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 199. [2023-11-21 22:10:03,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 159 states have (on average 1.628930817610063) internal successors, (259), 180 states have internal predecessors, (259), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2023-11-21 22:10:03,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 304 transitions. [2023-11-21 22:10:03,880 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 304 transitions. Word has length 8 [2023-11-21 22:10:03,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:03,880 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 304 transitions. [2023-11-21 22:10:03,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:03,881 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 304 transitions. [2023-11-21 22:10:03,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-21 22:10:03,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:03,881 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:03,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:10:03,882 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:03,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:03,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1946967178, now seen corresponding path program 1 times [2023-11-21 22:10:03,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:03,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444277548] [2023-11-21 22:10:03,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:03,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:03,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:03,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:03,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444277548] [2023-11-21 22:10:03,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444277548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:10:03,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:10:03,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:10:03,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532880915] [2023-11-21 22:10:03,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:10:03,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:10:03,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:03,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:10:03,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:10:03,979 INFO L87 Difference]: Start difference. First operand 199 states and 304 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:04,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:04,087 INFO L93 Difference]: Finished difference Result 247 states and 327 transitions. [2023-11-21 22:10:04,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:10:04,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-21 22:10:04,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:04,090 INFO L225 Difference]: With dead ends: 247 [2023-11-21 22:10:04,091 INFO L226 Difference]: Without dead ends: 247 [2023-11-21 22:10:04,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:10:04,092 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 179 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:04,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 203 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:10:04,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-11-21 22:10:04,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 213. [2023-11-21 22:10:04,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 172 states have (on average 1.627906976744186) internal successors, (280), 194 states have internal predecessors, (280), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2023-11-21 22:10:04,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 325 transitions. [2023-11-21 22:10:04,107 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 325 transitions. Word has length 9 [2023-11-21 22:10:04,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:04,108 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 325 transitions. [2023-11-21 22:10:04,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:04,108 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 325 transitions. [2023-11-21 22:10:04,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-21 22:10:04,109 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:04,109 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:04,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 22:10:04,110 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:04,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:04,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1504808304, now seen corresponding path program 1 times [2023-11-21 22:10:04,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:04,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236593210] [2023-11-21 22:10:04,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:04,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:04,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:04,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:04,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236593210] [2023-11-21 22:10:04,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236593210] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:04,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603361333] [2023-11-21 22:10:04,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:04,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:04,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:04,278 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:04,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:10:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:04,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:10:04,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:04,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:04,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603361333] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:10:04,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:10:04,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2023-11-21 22:10:04,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693660906] [2023-11-21 22:10:04,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:04,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 22:10:04,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:04,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 22:10:04,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:10:04,823 INFO L87 Difference]: Start difference. First operand 213 states and 325 transitions. Second operand has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:05,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:05,132 INFO L93 Difference]: Finished difference Result 282 states and 389 transitions. [2023-11-21 22:10:05,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:10:05,134 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-21 22:10:05,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:05,137 INFO L225 Difference]: With dead ends: 282 [2023-11-21 22:10:05,137 INFO L226 Difference]: Without dead ends: 282 [2023-11-21 22:10:05,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-11-21 22:10:05,141 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 351 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:05,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 561 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:10:05,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-11-21 22:10:05,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 219. [2023-11-21 22:10:05,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 177 states have (on average 1.5593220338983051) internal successors, (276), 200 states have internal predecessors, (276), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2023-11-21 22:10:05,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 326 transitions. [2023-11-21 22:10:05,163 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 326 transitions. Word has length 13 [2023-11-21 22:10:05,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:05,164 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 326 transitions. [2023-11-21 22:10:05,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:05,164 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 326 transitions. [2023-11-21 22:10:05,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-21 22:10:05,165 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:05,165 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:05,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:05,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-21 22:10:05,385 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:05,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:05,385 INFO L85 PathProgramCache]: Analyzing trace with hash 595582782, now seen corresponding path program 1 times [2023-11-21 22:10:05,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:05,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585505594] [2023-11-21 22:10:05,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:05,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:05,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:05,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585505594] [2023-11-21 22:10:05,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585505594] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:05,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614501475] [2023-11-21 22:10:05,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:05,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:05,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:05,561 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:05,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:10:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:05,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-21 22:10:05,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:05,865 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:05,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614501475] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:10:05,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:10:05,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2023-11-21 22:10:05,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043246976] [2023-11-21 22:10:05,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:05,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 22:10:05,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:05,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 22:10:05,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-21 22:10:05,980 INFO L87 Difference]: Start difference. First operand 219 states and 326 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:06,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:06,361 INFO L93 Difference]: Finished difference Result 323 states and 455 transitions. [2023-11-21 22:10:06,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:10:06,362 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-21 22:10:06,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:06,367 INFO L225 Difference]: With dead ends: 323 [2023-11-21 22:10:06,367 INFO L226 Difference]: Without dead ends: 323 [2023-11-21 22:10:06,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-21 22:10:06,370 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 194 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:06,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 441 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:10:06,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-11-21 22:10:06,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 229. [2023-11-21 22:10:06,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 186 states have (on average 1.5483870967741935) internal successors, (288), 210 states have internal predecessors, (288), 11 states have call successors, (11), 7 states have call predecessors, (11), 11 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2023-11-21 22:10:06,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 340 transitions. [2023-11-21 22:10:06,391 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 340 transitions. Word has length 14 [2023-11-21 22:10:06,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:06,391 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 340 transitions. [2023-11-21 22:10:06,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:06,392 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 340 transitions. [2023-11-21 22:10:06,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 22:10:06,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:06,395 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:06,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:06,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:06,616 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:06,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:06,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1283197103, now seen corresponding path program 1 times [2023-11-21 22:10:06,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:06,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891347517] [2023-11-21 22:10:06,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:06,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:06,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:06,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:06,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891347517] [2023-11-21 22:10:06,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891347517] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:06,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548265239] [2023-11-21 22:10:06,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:06,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:06,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:06,857 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:06,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:10:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:06,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-21 22:10:06,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:07,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:07,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:07,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548265239] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:10:07,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:10:07,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-11-21 22:10:07,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735273668] [2023-11-21 22:10:07,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:07,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 22:10:07,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:07,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 22:10:07,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-21 22:10:07,387 INFO L87 Difference]: Start difference. First operand 229 states and 340 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:08,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:08,064 INFO L93 Difference]: Finished difference Result 527 states and 713 transitions. [2023-11-21 22:10:08,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 22:10:08,064 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-21 22:10:08,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:08,069 INFO L225 Difference]: With dead ends: 527 [2023-11-21 22:10:08,069 INFO L226 Difference]: Without dead ends: 527 [2023-11-21 22:10:08,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2023-11-21 22:10:08,072 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 637 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:08,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 723 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:10:08,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2023-11-21 22:10:08,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 331. [2023-11-21 22:10:08,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 278 states have (on average 1.5755395683453237) internal successors, (438), 306 states have internal predecessors, (438), 14 states have call successors, (14), 10 states have call predecessors, (14), 18 states have return successors, (56), 14 states have call predecessors, (56), 14 states have call successors, (56) [2023-11-21 22:10:08,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 508 transitions. [2023-11-21 22:10:08,098 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 508 transitions. Word has length 15 [2023-11-21 22:10:08,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:08,098 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 508 transitions. [2023-11-21 22:10:08,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:08,099 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 508 transitions. [2023-11-21 22:10:08,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 22:10:08,100 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:08,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:08,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:08,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:08,321 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:08,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:08,321 INFO L85 PathProgramCache]: Analyzing trace with hash 782141219, now seen corresponding path program 1 times [2023-11-21 22:10:08,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:08,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310642511] [2023-11-21 22:10:08,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:08,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:08,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:08,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310642511] [2023-11-21 22:10:08,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310642511] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:10:08,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:10:08,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:10:08,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824260321] [2023-11-21 22:10:08,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:10:08,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:10:08,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:08,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:10:08,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:10:08,372 INFO L87 Difference]: Start difference. First operand 331 states and 508 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:08,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:08,407 INFO L93 Difference]: Finished difference Result 476 states and 732 transitions. [2023-11-21 22:10:08,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:10:08,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-21 22:10:08,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:08,412 INFO L225 Difference]: With dead ends: 476 [2023-11-21 22:10:08,412 INFO L226 Difference]: Without dead ends: 476 [2023-11-21 22:10:08,412 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 [2023-11-21 22:10:08,413 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 52 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:08,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 104 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:10:08,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2023-11-21 22:10:08,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 460. [2023-11-21 22:10:08,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 394 states have (on average 1.5786802030456852) internal successors, (622), 426 states have internal predecessors, (622), 19 states have call successors, (19), 14 states have call predecessors, (19), 26 states have return successors, (86), 19 states have call predecessors, (86), 19 states have call successors, (86) [2023-11-21 22:10:08,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 727 transitions. [2023-11-21 22:10:08,438 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 727 transitions. Word has length 16 [2023-11-21 22:10:08,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:08,439 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 727 transitions. [2023-11-21 22:10:08,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:08,439 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 727 transitions. [2023-11-21 22:10:08,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 22:10:08,440 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:08,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:08,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 22:10:08,441 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:08,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:08,442 INFO L85 PathProgramCache]: Analyzing trace with hash 782141475, now seen corresponding path program 1 times [2023-11-21 22:10:08,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:08,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033254066] [2023-11-21 22:10:08,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:08,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:08,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:08,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:08,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033254066] [2023-11-21 22:10:08,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033254066] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:10:08,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:10:08,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:10:08,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679668793] [2023-11-21 22:10:08,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:10:08,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:10:08,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:08,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:10:08,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:10:08,476 INFO L87 Difference]: Start difference. First operand 460 states and 727 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:08,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:08,498 INFO L93 Difference]: Finished difference Result 422 states and 661 transitions. [2023-11-21 22:10:08,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:10:08,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-21 22:10:08,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:08,502 INFO L225 Difference]: With dead ends: 422 [2023-11-21 22:10:08,502 INFO L226 Difference]: Without dead ends: 422 [2023-11-21 22:10:08,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:10:08,503 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 7 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:08,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 96 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:10:08,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2023-11-21 22:10:08,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 422. [2023-11-21 22:10:08,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 362 states have (on average 1.5359116022099448) internal successors, (556), 388 states have internal predecessors, (556), 19 states have call successors, (19), 14 states have call predecessors, (19), 26 states have return successors, (86), 19 states have call predecessors, (86), 19 states have call successors, (86) [2023-11-21 22:10:08,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 661 transitions. [2023-11-21 22:10:08,529 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 661 transitions. Word has length 16 [2023-11-21 22:10:08,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:08,529 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 661 transitions. [2023-11-21 22:10:08,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:08,530 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 661 transitions. [2023-11-21 22:10:08,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-21 22:10:08,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:08,531 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:08,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 22:10:08,531 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:08,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:08,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1523425915, now seen corresponding path program 1 times [2023-11-21 22:10:08,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:08,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614714957] [2023-11-21 22:10:08,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:08,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:08,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:08,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614714957] [2023-11-21 22:10:08,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614714957] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:10:08,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:10:08,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:10:08,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709460241] [2023-11-21 22:10:08,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:10:08,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:10:08,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:08,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:10:08,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:10:08,619 INFO L87 Difference]: Start difference. First operand 422 states and 661 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:08,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:08,677 INFO L93 Difference]: Finished difference Result 489 states and 740 transitions. [2023-11-21 22:10:08,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:10:08,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-21 22:10:08,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:08,681 INFO L225 Difference]: With dead ends: 489 [2023-11-21 22:10:08,681 INFO L226 Difference]: Without dead ends: 489 [2023-11-21 22:10:08,682 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 [2023-11-21 22:10:08,682 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 33 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:08,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 85 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:10:08,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2023-11-21 22:10:08,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 471. [2023-11-21 22:10:08,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 408 states have (on average 1.5245098039215685) internal successors, (622), 435 states have internal predecessors, (622), 20 states have call successors, (20), 15 states have call predecessors, (20), 28 states have return successors, (89), 20 states have call predecessors, (89), 20 states have call successors, (89) [2023-11-21 22:10:08,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 731 transitions. [2023-11-21 22:10:08,707 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 731 transitions. Word has length 17 [2023-11-21 22:10:08,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:08,707 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 731 transitions. [2023-11-21 22:10:08,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:08,708 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 731 transitions. [2023-11-21 22:10:08,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-21 22:10:08,709 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:08,709 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:08,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 22:10:08,710 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:08,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:08,710 INFO L85 PathProgramCache]: Analyzing trace with hash -930123830, now seen corresponding path program 1 times [2023-11-21 22:10:08,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:08,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346660222] [2023-11-21 22:10:08,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:08,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:08,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:10:08,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:08,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:08,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346660222] [2023-11-21 22:10:08,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346660222] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:10:08,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:10:08,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:10:08,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710596478] [2023-11-21 22:10:08,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:10:08,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:10:08,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:08,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:10:08,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:10:08,770 INFO L87 Difference]: Start difference. First operand 471 states and 731 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:10:08,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:08,852 INFO L93 Difference]: Finished difference Result 340 states and 510 transitions. [2023-11-21 22:10:08,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:10:08,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-11-21 22:10:08,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:08,856 INFO L225 Difference]: With dead ends: 340 [2023-11-21 22:10:08,856 INFO L226 Difference]: Without dead ends: 340 [2023-11-21 22:10:08,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:10:08,857 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 41 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:08,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 53 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:10:08,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-11-21 22:10:08,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2023-11-21 22:10:08,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 289 states have (on average 1.494809688581315) internal successors, (432), 313 states have internal predecessors, (432), 15 states have call successors, (15), 11 states have call predecessors, (15), 21 states have return successors, (63), 15 states have call predecessors, (63), 15 states have call successors, (63) [2023-11-21 22:10:08,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 510 transitions. [2023-11-21 22:10:08,876 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 510 transitions. Word has length 23 [2023-11-21 22:10:08,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:08,876 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 510 transitions. [2023-11-21 22:10:08,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:10:08,877 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 510 transitions. [2023-11-21 22:10:08,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-21 22:10:08,878 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:08,878 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:08,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-21 22:10:08,879 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:08,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:08,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1021137934, now seen corresponding path program 1 times [2023-11-21 22:10:08,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:08,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384851682] [2023-11-21 22:10:08,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:08,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:09,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:10:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:09,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:09,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384851682] [2023-11-21 22:10:09,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384851682] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:09,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815255488] [2023-11-21 22:10:09,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:09,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:09,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:09,204 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:09,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:10:09,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:09,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-21 22:10:09,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:09,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:10:09,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:10:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:09,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:09,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815255488] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:09,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:10:09,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2023-11-21 22:10:09,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922460449] [2023-11-21 22:10:09,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:09,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 22:10:09,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:09,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 22:10:09,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-11-21 22:10:09,915 INFO L87 Difference]: Start difference. First operand 340 states and 510 transitions. Second operand has 15 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:10:10,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:10,854 INFO L93 Difference]: Finished difference Result 463 states and 670 transitions. [2023-11-21 22:10:10,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-21 22:10:10,855 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-11-21 22:10:10,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:10,859 INFO L225 Difference]: With dead ends: 463 [2023-11-21 22:10:10,859 INFO L226 Difference]: Without dead ends: 463 [2023-11-21 22:10:10,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2023-11-21 22:10:10,861 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 592 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:10,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 99 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:10:10,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-11-21 22:10:10,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 350. [2023-11-21 22:10:10,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 301 states have (on average 1.4485049833887043) internal successors, (436), 323 states have internal predecessors, (436), 15 states have call successors, (15), 11 states have call predecessors, (15), 19 states have return successors, (60), 15 states have call predecessors, (60), 15 states have call successors, (60) [2023-11-21 22:10:10,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 511 transitions. [2023-11-21 22:10:10,881 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 511 transitions. Word has length 25 [2023-11-21 22:10:10,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:10,882 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 511 transitions. [2023-11-21 22:10:10,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:10:10,882 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 511 transitions. [2023-11-21 22:10:10,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-21 22:10:10,884 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:10,884 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:10,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:11,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-21 22:10:11,101 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:11,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:11,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1395484383, now seen corresponding path program 1 times [2023-11-21 22:10:11,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:11,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873644548] [2023-11-21 22:10:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:11,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:11,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:10:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:11,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:11,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873644548] [2023-11-21 22:10:11,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873644548] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:11,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776533557] [2023-11-21 22:10:11,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:11,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:11,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:11,350 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:11,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:10:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:11,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:10:11,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:11,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:11,587 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:10:11,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776533557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:10:11,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:10:11,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-21 22:10:11,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491651956] [2023-11-21 22:10:11,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:10:11,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:10:11,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:11,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:10:11,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:10:11,590 INFO L87 Difference]: Start difference. First operand 350 states and 511 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:10:11,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:11,683 INFO L93 Difference]: Finished difference Result 423 states and 609 transitions. [2023-11-21 22:10:11,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:10:11,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-11-21 22:10:11,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:11,688 INFO L225 Difference]: With dead ends: 423 [2023-11-21 22:10:11,688 INFO L226 Difference]: Without dead ends: 423 [2023-11-21 22:10:11,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:10:11,691 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 86 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:11,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 117 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:10:11,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2023-11-21 22:10:11,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 357. [2023-11-21 22:10:11,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 308 states have (on average 1.4383116883116882) internal successors, (443), 330 states have internal predecessors, (443), 15 states have call successors, (15), 11 states have call predecessors, (15), 19 states have return successors, (60), 15 states have call predecessors, (60), 15 states have call successors, (60) [2023-11-21 22:10:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 518 transitions. [2023-11-21 22:10:11,718 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 518 transitions. Word has length 26 [2023-11-21 22:10:11,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:11,718 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 518 transitions. [2023-11-21 22:10:11,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:10:11,719 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 518 transitions. [2023-11-21 22:10:11,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-21 22:10:11,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:11,720 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:11,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:11,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:11,940 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:11,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:11,941 INFO L85 PathProgramCache]: Analyzing trace with hash 2061009581, now seen corresponding path program 1 times [2023-11-21 22:10:11,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:11,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945968386] [2023-11-21 22:10:11,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:11,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:11,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:12,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:10:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:12,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:12,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945968386] [2023-11-21 22:10:12,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945968386] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:12,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650616729] [2023-11-21 22:10:12,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:12,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:12,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:12,689 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:12,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:10:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:12,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-21 22:10:12,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:13,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:10:13,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:10:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:13,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:13,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650616729] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:13,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:10:13,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2023-11-21 22:10:13,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861417342] [2023-11-21 22:10:13,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:13,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-21 22:10:13,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:13,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-21 22:10:13,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-11-21 22:10:13,582 INFO L87 Difference]: Start difference. First operand 357 states and 518 transitions. Second operand has 19 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:10:14,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:14,556 INFO L93 Difference]: Finished difference Result 424 states and 605 transitions. [2023-11-21 22:10:14,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 22:10:14,557 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-11-21 22:10:14,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:14,561 INFO L225 Difference]: With dead ends: 424 [2023-11-21 22:10:14,561 INFO L226 Difference]: Without dead ends: 424 [2023-11-21 22:10:14,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2023-11-21 22:10:14,563 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 314 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:14,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 151 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:10:14,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-11-21 22:10:14,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 360. [2023-11-21 22:10:14,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 311 states have (on average 1.4180064308681672) internal successors, (441), 333 states have internal predecessors, (441), 15 states have call successors, (15), 11 states have call predecessors, (15), 19 states have return successors, (60), 15 states have call predecessors, (60), 15 states have call successors, (60) [2023-11-21 22:10:14,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 516 transitions. [2023-11-21 22:10:14,593 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 516 transitions. Word has length 27 [2023-11-21 22:10:14,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:14,595 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 516 transitions. [2023-11-21 22:10:14,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:10:14,596 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 516 transitions. [2023-11-21 22:10:14,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-21 22:10:14,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:14,603 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:14,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:14,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-21 22:10:14,824 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:14,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:14,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1714166539, now seen corresponding path program 1 times [2023-11-21 22:10:14,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:14,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786107909] [2023-11-21 22:10:14,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:14,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:14,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:10:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:14,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:14,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786107909] [2023-11-21 22:10:14,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786107909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:10:14,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:10:14,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:10:14,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135892995] [2023-11-21 22:10:14,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:10:14,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:10:14,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:14,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:10:14,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:10:14,954 INFO L87 Difference]: Start difference. First operand 360 states and 516 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:10:15,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:15,181 INFO L93 Difference]: Finished difference Result 349 states and 480 transitions. [2023-11-21 22:10:15,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 22:10:15,182 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-11-21 22:10:15,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:15,184 INFO L225 Difference]: With dead ends: 349 [2023-11-21 22:10:15,184 INFO L226 Difference]: Without dead ends: 348 [2023-11-21 22:10:15,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-21 22:10:15,185 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 113 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:15,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 118 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:10:15,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-21 22:10:15,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 341. [2023-11-21 22:10:15,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 296 states have (on average 1.4222972972972974) internal successors, (421), 319 states have internal predecessors, (421), 12 states have call successors, (12), 9 states have call predecessors, (12), 18 states have return successors, (42), 12 states have call predecessors, (42), 12 states have call successors, (42) [2023-11-21 22:10:15,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 475 transitions. [2023-11-21 22:10:15,198 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 475 transitions. Word has length 28 [2023-11-21 22:10:15,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:15,198 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 475 transitions. [2023-11-21 22:10:15,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:10:15,199 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 475 transitions. [2023-11-21 22:10:15,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-21 22:10:15,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:15,200 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:15,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-21 22:10:15,200 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:15,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:15,201 INFO L85 PathProgramCache]: Analyzing trace with hash -533212382, now seen corresponding path program 1 times [2023-11-21 22:10:15,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:15,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366925199] [2023-11-21 22:10:15,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:15,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:15,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:10:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:15,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:15,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366925199] [2023-11-21 22:10:15,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366925199] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:15,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406763038] [2023-11-21 22:10:15,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:15,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:15,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:15,454 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:15,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 22:10:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:15,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-21 22:10:15,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:15,638 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-21 22:10:15,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-21 22:10:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:15,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:15,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406763038] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:15,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:10:15,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2023-11-21 22:10:15,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89637194] [2023-11-21 22:10:15,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:15,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 22:10:15,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:15,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 22:10:15,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:10:15,747 INFO L87 Difference]: Start difference. First operand 341 states and 475 transitions. Second operand has 12 states, 10 states have (on average 3.9) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 22:10:16,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:16,317 INFO L93 Difference]: Finished difference Result 467 states and 602 transitions. [2023-11-21 22:10:16,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 22:10:16,319 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.9) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-11-21 22:10:16,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:16,321 INFO L225 Difference]: With dead ends: 467 [2023-11-21 22:10:16,321 INFO L226 Difference]: Without dead ends: 467 [2023-11-21 22:10:16,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2023-11-21 22:10:16,323 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 464 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:16,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 157 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:10:16,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2023-11-21 22:10:16,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 412. [2023-11-21 22:10:16,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 364 states have (on average 1.3846153846153846) internal successors, (504), 388 states have internal predecessors, (504), 12 states have call successors, (12), 11 states have call predecessors, (12), 21 states have return successors, (41), 12 states have call predecessors, (41), 12 states have call successors, (41) [2023-11-21 22:10:16,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 557 transitions. [2023-11-21 22:10:16,339 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 557 transitions. Word has length 28 [2023-11-21 22:10:16,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:16,340 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 557 transitions. [2023-11-21 22:10:16,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.9) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 22:10:16,340 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 557 transitions. [2023-11-21 22:10:16,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-21 22:10:16,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:16,341 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:16,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:16,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-21 22:10:16,556 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:16,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:16,557 INFO L85 PathProgramCache]: Analyzing trace with hash 650285391, now seen corresponding path program 1 times [2023-11-21 22:10:16,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:16,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833122659] [2023-11-21 22:10:16,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:16,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:16,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:10:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:16,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:16,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833122659] [2023-11-21 22:10:16,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833122659] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:16,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929823215] [2023-11-21 22:10:16,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:16,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:16,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:16,831 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:16,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 22:10:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:16,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-21 22:10:16,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:17,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:10:17,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:10:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:17,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:17,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929823215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:17,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:10:17,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2023-11-21 22:10:17,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856975606] [2023-11-21 22:10:17,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:17,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 22:10:17,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:17,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 22:10:17,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-11-21 22:10:17,304 INFO L87 Difference]: Start difference. First operand 412 states and 557 transitions. Second operand has 16 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:10:18,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:18,286 INFO L93 Difference]: Finished difference Result 564 states and 702 transitions. [2023-11-21 22:10:18,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-21 22:10:18,287 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-11-21 22:10:18,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:18,290 INFO L225 Difference]: With dead ends: 564 [2023-11-21 22:10:18,290 INFO L226 Difference]: Without dead ends: 564 [2023-11-21 22:10:18,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2023-11-21 22:10:18,292 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 421 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:18,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 232 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:10:18,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2023-11-21 22:10:18,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 508. [2023-11-21 22:10:18,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 455 states have (on average 1.3648351648351649) internal successors, (621), 483 states have internal predecessors, (621), 12 states have call successors, (12), 12 states have call predecessors, (12), 26 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2023-11-21 22:10:18,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 669 transitions. [2023-11-21 22:10:18,311 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 669 transitions. Word has length 29 [2023-11-21 22:10:18,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:18,313 INFO L495 AbstractCegarLoop]: Abstraction has 508 states and 669 transitions. [2023-11-21 22:10:18,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:10:18,313 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 669 transitions. [2023-11-21 22:10:18,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-21 22:10:18,314 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:18,314 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:18,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:18,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:18,528 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:18,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:18,529 INFO L85 PathProgramCache]: Analyzing trace with hash -173884203, now seen corresponding path program 1 times [2023-11-21 22:10:18,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:18,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371210390] [2023-11-21 22:10:18,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:18,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:18,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:10:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:18,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:18,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371210390] [2023-11-21 22:10:18,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371210390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:18,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381253386] [2023-11-21 22:10:18,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:18,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:18,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:18,868 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:18,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 22:10:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:18,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-21 22:10:18,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:19,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:10:19,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:10:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:19,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:19,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381253386] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:19,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:10:19,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2023-11-21 22:10:19,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068248452] [2023-11-21 22:10:19,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:19,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-21 22:10:19,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:19,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-21 22:10:19,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-11-21 22:10:19,664 INFO L87 Difference]: Start difference. First operand 508 states and 669 transitions. Second operand has 18 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:10:20,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:20,662 INFO L93 Difference]: Finished difference Result 625 states and 779 transitions. [2023-11-21 22:10:20,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-21 22:10:20,662 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2023-11-21 22:10:20,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:20,666 INFO L225 Difference]: With dead ends: 625 [2023-11-21 22:10:20,666 INFO L226 Difference]: Without dead ends: 625 [2023-11-21 22:10:20,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=326, Invalid=1080, Unknown=0, NotChecked=0, Total=1406 [2023-11-21 22:10:20,668 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 668 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:20,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 173 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:10:20,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2023-11-21 22:10:20,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 507. [2023-11-21 22:10:20,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 457 states have (on average 1.3107221006564551) internal successors, (599), 482 states have internal predecessors, (599), 12 states have call successors, (12), 12 states have call predecessors, (12), 26 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2023-11-21 22:10:20,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 647 transitions. [2023-11-21 22:10:20,687 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 647 transitions. Word has length 33 [2023-11-21 22:10:20,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:20,688 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 647 transitions. [2023-11-21 22:10:20,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:10:20,688 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 647 transitions. [2023-11-21 22:10:20,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-21 22:10:20,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:20,689 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:20,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:20,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:20,901 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:20,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:20,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1979993530, now seen corresponding path program 1 times [2023-11-21 22:10:20,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:20,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930153841] [2023-11-21 22:10:20,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:20,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:20,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:21,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:10:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 22:10:21,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:21,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930153841] [2023-11-21 22:10:21,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930153841] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:21,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280155263] [2023-11-21 22:10:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:21,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:21,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:21,158 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:21,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-21 22:10:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:21,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 22:10:21,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:21,483 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-21 22:10:21,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-21 22:10:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:10:21,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:21,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-21 22:10:21,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-21 22:10:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:10:21,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280155263] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:10:21,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:10:21,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2023-11-21 22:10:21,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837457847] [2023-11-21 22:10:21,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:21,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-21 22:10:21,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:21,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-21 22:10:21,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-11-21 22:10:21,843 INFO L87 Difference]: Start difference. First operand 507 states and 647 transitions. Second operand has 17 states, 12 states have (on average 6.333333333333333) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:10:22,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:22,369 INFO L93 Difference]: Finished difference Result 556 states and 682 transitions. [2023-11-21 22:10:22,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-21 22:10:22,370 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 12 states have (on average 6.333333333333333) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2023-11-21 22:10:22,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:22,373 INFO L225 Difference]: With dead ends: 556 [2023-11-21 22:10:22,373 INFO L226 Difference]: Without dead ends: 556 [2023-11-21 22:10:22,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2023-11-21 22:10:22,375 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 326 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:22,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 142 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:10:22,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2023-11-21 22:10:22,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 515. [2023-11-21 22:10:22,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 466 states have (on average 1.3111587982832618) internal successors, (611), 490 states have internal predecessors, (611), 12 states have call successors, (12), 12 states have call predecessors, (12), 25 states have return successors, (33), 12 states have call predecessors, (33), 12 states have call successors, (33) [2023-11-21 22:10:22,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 656 transitions. [2023-11-21 22:10:22,400 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 656 transitions. Word has length 34 [2023-11-21 22:10:22,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:22,401 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 656 transitions. [2023-11-21 22:10:22,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 12 states have (on average 6.333333333333333) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:10:22,401 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 656 transitions. [2023-11-21 22:10:22,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-21 22:10:22,402 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:22,402 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:22,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:22,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-21 22:10:22,623 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:22,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:22,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1250257267, now seen corresponding path program 1 times [2023-11-21 22:10:22,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:22,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074640466] [2023-11-21 22:10:22,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:22,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:22,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:10:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:23,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:23,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074640466] [2023-11-21 22:10:23,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074640466] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:23,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577542191] [2023-11-21 22:10:23,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:23,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:23,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:23,265 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:23,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-21 22:10:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:23,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:10:23,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:23,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:24,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577542191] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:10:24,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:10:24,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 24 [2023-11-21 22:10:24,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252631156] [2023-11-21 22:10:24,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:24,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-21 22:10:24,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:24,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-21 22:10:24,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2023-11-21 22:10:24,062 INFO L87 Difference]: Start difference. First operand 515 states and 656 transitions. Second operand has 25 states, 22 states have (on average 4.181818181818182) internal successors, (92), 20 states have internal predecessors, (92), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:10:26,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:26,341 INFO L93 Difference]: Finished difference Result 856 states and 1036 transitions. [2023-11-21 22:10:26,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-21 22:10:26,341 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 4.181818181818182) internal successors, (92), 20 states have internal predecessors, (92), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2023-11-21 22:10:26,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:26,346 INFO L225 Difference]: With dead ends: 856 [2023-11-21 22:10:26,346 INFO L226 Difference]: Without dead ends: 856 [2023-11-21 22:10:26,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=591, Invalid=2831, Unknown=0, NotChecked=0, Total=3422 [2023-11-21 22:10:26,349 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 1137 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:26,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1137 Valid, 465 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-21 22:10:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2023-11-21 22:10:26,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 521. [2023-11-21 22:10:26,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 474 states have (on average 1.2995780590717299) internal successors, (616), 498 states have internal predecessors, (616), 11 states have call successors, (11), 11 states have call predecessors, (11), 24 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2023-11-21 22:10:26,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 658 transitions. [2023-11-21 22:10:26,370 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 658 transitions. Word has length 35 [2023-11-21 22:10:26,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:26,370 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 658 transitions. [2023-11-21 22:10:26,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 4.181818181818182) internal successors, (92), 20 states have internal predecessors, (92), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:10:26,370 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 658 transitions. [2023-11-21 22:10:26,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-21 22:10:26,371 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:26,371 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:26,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:26,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:26,592 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr19ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:26,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:26,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1093317612, now seen corresponding path program 1 times [2023-11-21 22:10:26,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:26,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507380069] [2023-11-21 22:10:26,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:26,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:26,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:10:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:26,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:26,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507380069] [2023-11-21 22:10:26,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507380069] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:26,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28801755] [2023-11-21 22:10:26,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:26,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:26,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:26,713 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:26,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-21 22:10:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:26,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 22:10:26,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:26,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:26,878 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:26,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28801755] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:10:26,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:10:26,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2023-11-21 22:10:26,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516456378] [2023-11-21 22:10:26,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:26,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:10:26,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:26,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:10:26,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:10:26,881 INFO L87 Difference]: Start difference. First operand 521 states and 658 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:10:26,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:26,979 INFO L93 Difference]: Finished difference Result 531 states and 663 transitions. [2023-11-21 22:10:26,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:10:26,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2023-11-21 22:10:26,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:26,983 INFO L225 Difference]: With dead ends: 531 [2023-11-21 22:10:26,983 INFO L226 Difference]: Without dead ends: 531 [2023-11-21 22:10:26,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:10:26,984 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 63 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:26,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 46 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:10:26,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2023-11-21 22:10:26,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 514. [2023-11-21 22:10:27,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 469 states have (on average 1.2857142857142858) internal successors, (603), 491 states have internal predecessors, (603), 11 states have call successors, (11), 11 states have call predecessors, (11), 24 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2023-11-21 22:10:27,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 645 transitions. [2023-11-21 22:10:27,003 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 645 transitions. Word has length 37 [2023-11-21 22:10:27,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:27,004 INFO L495 AbstractCegarLoop]: Abstraction has 514 states and 645 transitions. [2023-11-21 22:10:27,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:10:27,004 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 645 transitions. [2023-11-21 22:10:27,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-21 22:10:27,005 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:27,005 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:27,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:27,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-21 22:10:27,224 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr20ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:27,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:27,225 INFO L85 PathProgramCache]: Analyzing trace with hash -466892292, now seen corresponding path program 1 times [2023-11-21 22:10:27,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:27,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516688774] [2023-11-21 22:10:27,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:27,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:27,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:10:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:27,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:27,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516688774] [2023-11-21 22:10:27,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516688774] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:27,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101357182] [2023-11-21 22:10:27,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:27,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:27,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:27,351 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:27,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-21 22:10:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:27,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 22:10:27,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:27,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:27,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101357182] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:10:27,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:10:27,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2023-11-21 22:10:27,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122091957] [2023-11-21 22:10:27,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:27,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:10:27,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:27,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:10:27,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:10:27,570 INFO L87 Difference]: Start difference. First operand 514 states and 645 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:10:27,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:27,681 INFO L93 Difference]: Finished difference Result 524 states and 649 transitions. [2023-11-21 22:10:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:10:27,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2023-11-21 22:10:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:27,685 INFO L225 Difference]: With dead ends: 524 [2023-11-21 22:10:27,685 INFO L226 Difference]: Without dead ends: 524 [2023-11-21 22:10:27,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:10:27,686 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:27,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 37 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:10:27,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2023-11-21 22:10:27,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 512. [2023-11-21 22:10:27,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 469 states have (on average 1.2686567164179106) internal successors, (595), 489 states have internal predecessors, (595), 11 states have call successors, (11), 11 states have call predecessors, (11), 24 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2023-11-21 22:10:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 637 transitions. [2023-11-21 22:10:27,705 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 637 transitions. Word has length 38 [2023-11-21 22:10:27,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:27,706 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 637 transitions. [2023-11-21 22:10:27,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:10:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 637 transitions. [2023-11-21 22:10:27,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-21 22:10:27,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:27,707 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:27,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:27,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:27,928 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:27,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:27,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1588759058, now seen corresponding path program 1 times [2023-11-21 22:10:27,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:27,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915715601] [2023-11-21 22:10:27,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:27,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:28,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:10:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:28,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:28,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915715601] [2023-11-21 22:10:28,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915715601] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:28,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380172939] [2023-11-21 22:10:28,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:28,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:28,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:28,110 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:28,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-21 22:10:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:28,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-21 22:10:28,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:28,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 22:10:28,266 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-21 22:10:28,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-21 22:10:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:28,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:28,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380172939] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:10:28,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:10:28,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2023-11-21 22:10:28,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722384160] [2023-11-21 22:10:28,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:28,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:10:28,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:28,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:10:28,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:10:28,346 INFO L87 Difference]: Start difference. First operand 512 states and 637 transitions. Second operand has 5 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:10:28,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:28,503 INFO L93 Difference]: Finished difference Result 536 states and 652 transitions. [2023-11-21 22:10:28,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:10:28,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2023-11-21 22:10:28,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:28,507 INFO L225 Difference]: With dead ends: 536 [2023-11-21 22:10:28,508 INFO L226 Difference]: Without dead ends: 536 [2023-11-21 22:10:28,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:10:28,509 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 56 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:28,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 69 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:10:28,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2023-11-21 22:10:28,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 512. [2023-11-21 22:10:28,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 469 states have (on average 1.2579957356076759) internal successors, (590), 489 states have internal predecessors, (590), 11 states have call successors, (11), 11 states have call predecessors, (11), 24 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2023-11-21 22:10:28,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 632 transitions. [2023-11-21 22:10:28,527 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 632 transitions. Word has length 39 [2023-11-21 22:10:28,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:28,527 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 632 transitions. [2023-11-21 22:10:28,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:10:28,528 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 632 transitions. [2023-11-21 22:10:28,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-21 22:10:28,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:28,529 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:28,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:28,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-21 22:10:28,744 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:28,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:28,745 INFO L85 PathProgramCache]: Analyzing trace with hash 80818619, now seen corresponding path program 1 times [2023-11-21 22:10:28,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:28,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670177554] [2023-11-21 22:10:28,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:28,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:28,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:28,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:10:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:28,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:28,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670177554] [2023-11-21 22:10:28,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670177554] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:28,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096926253] [2023-11-21 22:10:28,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:28,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:28,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:28,822 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:28,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-21 22:10:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:28,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 22:10:28,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:10:28,948 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:10:28,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096926253] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:10:28,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:10:28,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-11-21 22:10:28,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042154393] [2023-11-21 22:10:28,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:10:28,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:10:28,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:28,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:10:28,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:10:28,951 INFO L87 Difference]: Start difference. First operand 512 states and 632 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:10:28,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:28,979 INFO L93 Difference]: Finished difference Result 377 states and 439 transitions. [2023-11-21 22:10:28,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:10:28,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-11-21 22:10:28,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:28,982 INFO L225 Difference]: With dead ends: 377 [2023-11-21 22:10:28,982 INFO L226 Difference]: Without dead ends: 377 [2023-11-21 22:10:28,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:10:28,983 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 56 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:28,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 164 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:10:28,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2023-11-21 22:10:28,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 319. [2023-11-21 22:10:28,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 288 states have (on average 1.21875) internal successors, (351), 302 states have internal predecessors, (351), 8 states have call successors, (8), 8 states have call predecessors, (8), 15 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2023-11-21 22:10:28,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 376 transitions. [2023-11-21 22:10:28,993 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 376 transitions. Word has length 43 [2023-11-21 22:10:28,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:28,994 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 376 transitions. [2023-11-21 22:10:28,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:10:28,994 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 376 transitions. [2023-11-21 22:10:28,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-21 22:10:28,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:28,995 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:29,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:29,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-21 22:10:29,216 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:29,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:29,217 INFO L85 PathProgramCache]: Analyzing trace with hash -85428762, now seen corresponding path program 1 times [2023-11-21 22:10:29,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:29,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521563905] [2023-11-21 22:10:29,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:29,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:29,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:10:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:29,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-21 22:10:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:10:29,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:29,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521563905] [2023-11-21 22:10:29,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521563905] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:29,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896403705] [2023-11-21 22:10:29,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:29,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:29,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:29,569 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:29,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-21 22:10:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:29,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-21 22:10:29,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:29,805 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 22:10:29,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-21 22:10:29,955 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-21 22:10:29,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-21 22:10:29,998 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-21 22:10:29,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-21 22:10:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:30,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:30,131 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-21 22:10:30,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 53 [2023-11-21 22:10:30,349 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-21 22:10:30,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 105 [2023-11-21 22:10:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:30,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896403705] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:10:30,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:10:30,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 25 [2023-11-21 22:10:30,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26595544] [2023-11-21 22:10:30,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:30,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-21 22:10:30,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:30,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-21 22:10:30,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2023-11-21 22:10:30,541 INFO L87 Difference]: Start difference. First operand 319 states and 376 transitions. Second operand has 26 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 24 states have internal predecessors, (123), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-21 22:10:30,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:30,840 INFO L93 Difference]: Finished difference Result 328 states and 384 transitions. [2023-11-21 22:10:30,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:10:30,841 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 24 states have internal predecessors, (123), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 48 [2023-11-21 22:10:30,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:30,843 INFO L225 Difference]: With dead ends: 328 [2023-11-21 22:10:30,843 INFO L226 Difference]: Without dead ends: 328 [2023-11-21 22:10:30,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2023-11-21 22:10:30,844 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 306 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:30,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 79 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:10:30,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2023-11-21 22:10:30,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 318. [2023-11-21 22:10:30,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 288 states have (on average 1.2118055555555556) internal successors, (349), 301 states have internal predecessors, (349), 8 states have call successors, (8), 8 states have call predecessors, (8), 15 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2023-11-21 22:10:30,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 374 transitions. [2023-11-21 22:10:30,855 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 374 transitions. Word has length 48 [2023-11-21 22:10:30,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:30,856 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 374 transitions. [2023-11-21 22:10:30,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 24 states have internal predecessors, (123), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-21 22:10:30,856 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 374 transitions. [2023-11-21 22:10:30,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-21 22:10:30,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:30,857 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:30,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:31,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-21 22:10:31,072 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:31,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:31,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1369053571, now seen corresponding path program 1 times [2023-11-21 22:10:31,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:31,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911562889] [2023-11-21 22:10:31,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:31,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:31,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:10:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:31,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-21 22:10:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:10:31,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:31,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911562889] [2023-11-21 22:10:31,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911562889] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:31,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384262589] [2023-11-21 22:10:31,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:31,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:31,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:31,364 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:31,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-21 22:10:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:31,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-21 22:10:31,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:31,537 WARN L876 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| Int)) (and (<= |parse_input_c1_~x~0#1.base| c_~global~0.base) (= |c_#valid| (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| (select |c_#valid| |parse_input_c1_~x~0#1.base|))))) is different from true [2023-11-21 22:10:31,584 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-21 22:10:31,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-21 22:10:31,769 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-21 22:10:31,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-21 22:10:31,832 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-11-21 22:10:31,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:31,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384262589] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:31,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:10:31,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2023-11-21 22:10:31,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537831575] [2023-11-21 22:10:31,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:31,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-21 22:10:31,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:31,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-21 22:10:31,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=363, Unknown=1, NotChecked=38, Total=462 [2023-11-21 22:10:31,950 INFO L87 Difference]: Start difference. First operand 318 states and 374 transitions. Second operand has 19 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 22:10:33,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:33,454 INFO L93 Difference]: Finished difference Result 312 states and 344 transitions. [2023-11-21 22:10:33,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-21 22:10:33,455 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 48 [2023-11-21 22:10:33,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:33,457 INFO L225 Difference]: With dead ends: 312 [2023-11-21 22:10:33,457 INFO L226 Difference]: Without dead ends: 312 [2023-11-21 22:10:33,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=530, Invalid=2229, Unknown=1, NotChecked=102, Total=2862 [2023-11-21 22:10:33,459 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 430 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:33,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 274 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 711 Invalid, 0 Unknown, 204 Unchecked, 0.6s Time] [2023-11-21 22:10:33,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2023-11-21 22:10:33,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 277. [2023-11-21 22:10:33,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 251 states have (on average 1.1872509960159363) internal successors, (298), 262 states have internal predecessors, (298), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2023-11-21 22:10:33,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 318 transitions. [2023-11-21 22:10:33,467 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 318 transitions. Word has length 48 [2023-11-21 22:10:33,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:33,467 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 318 transitions. [2023-11-21 22:10:33,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 22:10:33,468 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 318 transitions. [2023-11-21 22:10:33,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-21 22:10:33,468 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:33,469 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:33,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:33,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-21 22:10:33,682 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:33,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:33,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1646675655, now seen corresponding path program 1 times [2023-11-21 22:10:33,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:33,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357832837] [2023-11-21 22:10:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:33,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:34,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:10:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:34,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-21 22:10:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:34,329 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:10:34,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:34,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357832837] [2023-11-21 22:10:34,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357832837] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:34,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855357288] [2023-11-21 22:10:34,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:34,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:34,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:34,331 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:34,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-21 22:10:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:34,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-21 22:10:34,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:34,632 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 22:10:34,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-21 22:10:34,862 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-21 22:10:34,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-21 22:10:34,919 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-21 22:10:34,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-21 22:10:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:35,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:35,156 INFO L349 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2023-11-21 22:10:35,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 165 [2023-11-21 22:10:35,460 INFO L349 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2023-11-21 22:10:35,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 101 [2023-11-21 22:10:35,871 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:35,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855357288] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:10:35,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:10:35,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14] total 35 [2023-11-21 22:10:35,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966602139] [2023-11-21 22:10:35,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:35,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-21 22:10:35,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:35,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-21 22:10:35,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2023-11-21 22:10:35,875 INFO L87 Difference]: Start difference. First operand 277 states and 318 transitions. Second operand has 37 states, 32 states have (on average 4.0) internal successors, (128), 29 states have internal predecessors, (128), 6 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-21 22:10:36,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:36,646 INFO L93 Difference]: Finished difference Result 320 states and 359 transitions. [2023-11-21 22:10:36,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 22:10:36,646 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 4.0) internal successors, (128), 29 states have internal predecessors, (128), 6 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 49 [2023-11-21 22:10:36,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:36,648 INFO L225 Difference]: With dead ends: 320 [2023-11-21 22:10:36,648 INFO L226 Difference]: Without dead ends: 320 [2023-11-21 22:10:36,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=436, Invalid=1820, Unknown=0, NotChecked=0, Total=2256 [2023-11-21 22:10:36,650 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 314 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:36,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 159 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:10:36,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-11-21 22:10:36,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 277. [2023-11-21 22:10:36,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 251 states have (on average 1.1792828685258965) internal successors, (296), 262 states have internal predecessors, (296), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2023-11-21 22:10:36,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 316 transitions. [2023-11-21 22:10:36,658 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 316 transitions. Word has length 49 [2023-11-21 22:10:36,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:36,659 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 316 transitions. [2023-11-21 22:10:36,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 4.0) internal successors, (128), 29 states have internal predecessors, (128), 6 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-21 22:10:36,659 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 316 transitions. [2023-11-21 22:10:36,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-21 22:10:36,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:36,660 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:36,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:36,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-21 22:10:36,876 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:36,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:36,877 INFO L85 PathProgramCache]: Analyzing trace with hash 664362528, now seen corresponding path program 1 times [2023-11-21 22:10:36,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:36,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485007476] [2023-11-21 22:10:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:36,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:37,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:10:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:37,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-21 22:10:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 22:10:37,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:37,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485007476] [2023-11-21 22:10:37,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485007476] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:37,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595685423] [2023-11-21 22:10:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:37,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:37,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:37,266 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:37,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-21 22:10:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:37,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-21 22:10:37,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:37,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:10:37,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:10:37,650 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 22:10:37,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:37,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595685423] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:37,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:10:37,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2023-11-21 22:10:37,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614660177] [2023-11-21 22:10:37,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:37,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-21 22:10:37,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:37,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-21 22:10:37,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-11-21 22:10:37,894 INFO L87 Difference]: Start difference. First operand 277 states and 316 transitions. Second operand has 17 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 22:10:38,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:38,571 INFO L93 Difference]: Finished difference Result 290 states and 321 transitions. [2023-11-21 22:10:38,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-21 22:10:38,572 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 50 [2023-11-21 22:10:38,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:38,573 INFO L225 Difference]: With dead ends: 290 [2023-11-21 22:10:38,573 INFO L226 Difference]: Without dead ends: 290 [2023-11-21 22:10:38,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2023-11-21 22:10:38,575 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 298 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:38,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 201 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:10:38,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-11-21 22:10:38,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 276. [2023-11-21 22:10:38,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 251 states have (on average 1.1474103585657371) internal successors, (288), 261 states have internal predecessors, (288), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2023-11-21 22:10:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 308 transitions. [2023-11-21 22:10:38,583 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 308 transitions. Word has length 50 [2023-11-21 22:10:38,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:38,583 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 308 transitions. [2023-11-21 22:10:38,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 22:10:38,583 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 308 transitions. [2023-11-21 22:10:38,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-21 22:10:38,584 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:38,584 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:38,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:38,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:38,800 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:38,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:38,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1907340969, now seen corresponding path program 1 times [2023-11-21 22:10:38,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:38,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158237685] [2023-11-21 22:10:38,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:38,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:38,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:39,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:10:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:39,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-21 22:10:39,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:39,265 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:10:39,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:39,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158237685] [2023-11-21 22:10:39,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158237685] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:39,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159976230] [2023-11-21 22:10:39,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:39,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:39,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:39,268 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:39,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-21 22:10:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:39,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-21 22:10:39,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:39,485 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-21 22:10:39,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-21 22:10:39,748 INFO L349 Elim1Store]: treesize reduction 57, result has 30.5 percent of original size [2023-11-21 22:10:39,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 75 [2023-11-21 22:10:39,847 INFO L349 Elim1Store]: treesize reduction 69, result has 15.9 percent of original size [2023-11-21 22:10:39,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 64 [2023-11-21 22:10:39,888 INFO L349 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-11-21 22:10:39,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 11 [2023-11-21 22:10:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:39,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:40,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159976230] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:40,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:10:40,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2023-11-21 22:10:40,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497774359] [2023-11-21 22:10:40,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:40,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-21 22:10:40,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:40,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-21 22:10:40,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-11-21 22:10:40,031 INFO L87 Difference]: Start difference. First operand 276 states and 308 transitions. Second operand has 21 states, 18 states have (on average 4.5) internal successors, (81), 16 states have internal predecessors, (81), 2 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-21 22:10:41,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:10:41,068 INFO L93 Difference]: Finished difference Result 286 states and 317 transitions. [2023-11-21 22:10:41,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-21 22:10:41,069 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 4.5) internal successors, (81), 16 states have internal predecessors, (81), 2 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2023-11-21 22:10:41,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:10:41,070 INFO L225 Difference]: With dead ends: 286 [2023-11-21 22:10:41,070 INFO L226 Difference]: Without dead ends: 286 [2023-11-21 22:10:41,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=336, Invalid=1224, Unknown=0, NotChecked=0, Total=1560 [2023-11-21 22:10:41,072 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 307 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:10:41,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 155 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:10:41,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2023-11-21 22:10:41,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 275. [2023-11-21 22:10:41,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 251 states have (on average 1.1394422310756973) internal successors, (286), 260 states have internal predecessors, (286), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2023-11-21 22:10:41,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 306 transitions. [2023-11-21 22:10:41,079 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 306 transitions. Word has length 51 [2023-11-21 22:10:41,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:10:41,080 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 306 transitions. [2023-11-21 22:10:41,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 4.5) internal successors, (81), 16 states have internal predecessors, (81), 2 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-21 22:10:41,080 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 306 transitions. [2023-11-21 22:10:41,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-21 22:10:41,081 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:10:41,081 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:41,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:41,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:41,303 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:10:41,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:41,304 INFO L85 PathProgramCache]: Analyzing trace with hash 652197856, now seen corresponding path program 1 times [2023-11-21 22:10:41,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:41,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899561608] [2023-11-21 22:10:41,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:41,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:41,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:10:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:41,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-21 22:10:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:10:42,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:42,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899561608] [2023-11-21 22:10:42,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899561608] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:42,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173968131] [2023-11-21 22:10:42,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:42,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:42,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:42,164 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:42,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aabd62-8e11-43ef-b806-811eab97d8c0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-21 22:10:42,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:42,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-21 22:10:42,285 INFO L285 TraceCheckSpWp]: Computing forward predicates...