./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0235-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0235-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:10:12,291 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:10:12,371 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 23:10:12,376 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:10:12,377 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:10:12,402 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:10:12,411 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:10:12,412 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:10:12,413 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:10:12,413 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:10:12,414 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:10:12,415 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:10:12,415 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:10:12,417 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:10:12,418 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:10:12,418 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:10:12,420 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:10:12,423 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:10:12,423 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 23:10:12,424 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 23:10:12,424 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 23:10:12,429 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:10:12,429 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 23:10:12,430 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 23:10:12,430 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:10:12,430 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:10:12,431 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:10:12,431 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:10:12,432 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:10:12,432 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:10:12,433 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:10:12,433 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:10:12,434 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:10:12,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:10:12,436 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:10:12,436 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:10:12,436 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:10:12,436 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:10:12,436 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_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 [2023-11-06 23:10:12,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:10:12,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:10:12,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:10:12,753 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:10:12,754 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:10:12,755 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/memsafety/test-0235-2.i [2023-11-06 23:10:15,982 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:10:16,256 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:10:16,257 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/sv-benchmarks/c/memsafety/test-0235-2.i [2023-11-06 23:10:16,275 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/data/a6fedceb5/6640e6e4b72648f69f62436f5beb5bc5/FLAG5ac0067c3 [2023-11-06 23:10:16,291 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/data/a6fedceb5/6640e6e4b72648f69f62436f5beb5bc5 [2023-11-06 23:10:16,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:10:16,295 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:10:16,297 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:10:16,297 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:10:16,303 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:10:16,304 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:10:16" (1/1) ... [2023-11-06 23:10:16,305 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37990807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:16, skipping insertion in model container [2023-11-06 23:10:16,305 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:10:16" (1/1) ... [2023-11-06 23:10:16,386 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:10:16,824 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:10:16,842 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:10:16,899 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:10:16,947 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:10:16,948 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:16 WrapperNode [2023-11-06 23:10:16,948 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:10:16,949 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:10:16,949 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:10:16,950 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:10:16,957 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:16" (1/1) ... [2023-11-06 23:10:16,981 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:16" (1/1) ... [2023-11-06 23:10:17,034 INFO L138 Inliner]: procedures = 188, calls = 71, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 246 [2023-11-06 23:10:17,035 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:10:17,036 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:10:17,036 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:10:17,036 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:10:17,046 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:16" (1/1) ... [2023-11-06 23:10:17,047 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:16" (1/1) ... [2023-11-06 23:10:17,053 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:16" (1/1) ... [2023-11-06 23:10:17,053 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:16" (1/1) ... [2023-11-06 23:10:17,068 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:16" (1/1) ... [2023-11-06 23:10:17,073 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:16" (1/1) ... [2023-11-06 23:10:17,076 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:16" (1/1) ... [2023-11-06 23:10:17,079 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:16" (1/1) ... [2023-11-06 23:10:17,084 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:10:17,085 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:10:17,085 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:10:17,086 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:10:17,086 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:16" (1/1) ... [2023-11-06 23:10:17,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:10:17,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:17,119 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:10:17,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:10:17,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 23:10:17,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:10:17,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 23:10:17,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 23:10:17,167 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2023-11-06 23:10:17,167 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2023-11-06 23:10:17,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:10:17,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-06 23:10:17,168 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2023-11-06 23:10:17,168 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2023-11-06 23:10:17,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:10:17,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:10:17,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:10:17,321 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:10:17,323 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:10:17,957 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:10:17,967 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:10:17,967 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-06 23:10:17,970 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:10:17 BoogieIcfgContainer [2023-11-06 23:10:17,970 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:10:17,977 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:10:17,977 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:10:17,981 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:10:17,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:10:16" (1/3) ... [2023-11-06 23:10:17,982 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3641bcfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:10:17, skipping insertion in model container [2023-11-06 23:10:17,982 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:16" (2/3) ... [2023-11-06 23:10:17,984 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3641bcfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:10:17, skipping insertion in model container [2023-11-06 23:10:17,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:10:17" (3/3) ... [2023-11-06 23:10:17,986 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0235-2.i [2023-11-06 23:10:18,010 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:10:18,012 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 87 error locations. [2023-11-06 23:10:18,102 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:10:18,110 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;@417bd39d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:10:18,112 INFO L358 AbstractCegarLoop]: Starting to check reachability of 87 error locations. [2023-11-06 23:10:18,119 INFO L276 IsEmpty]: Start isEmpty. Operand has 238 states, 136 states have (on average 1.875) internal successors, (255), 223 states have internal predecessors, (255), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 23:10:18,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 23:10:18,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:18,129 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 23:10:18,130 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 23:10:18,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:18,137 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2023-11-06 23:10:18,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:18,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893760156] [2023-11-06 23:10:18,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:18,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:18,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:18,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:18,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893760156] [2023-11-06 23:10:18,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893760156] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:18,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:18,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:10:18,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129542152] [2023-11-06 23:10:18,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:18,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:10:18,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:18,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:10:18,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:10:18,419 INFO L87 Difference]: Start difference. First operand has 238 states, 136 states have (on average 1.875) internal successors, (255), 223 states have internal predecessors, (255), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:18,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:18,488 INFO L93 Difference]: Finished difference Result 238 states and 268 transitions. [2023-11-06 23:10:18,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:10:18,490 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-06 23:10:18,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:18,505 INFO L225 Difference]: With dead ends: 238 [2023-11-06 23:10:18,506 INFO L226 Difference]: Without dead ends: 236 [2023-11-06 23:10:18,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:10:18,515 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:18,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:10:18,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-11-06 23:10:18,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2023-11-06 23:10:18,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 135 states have (on average 1.7925925925925925) internal successors, (242), 221 states have internal predecessors, (242), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 23:10:18,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 266 transitions. [2023-11-06 23:10:18,604 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 266 transitions. Word has length 4 [2023-11-06 23:10:18,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:18,604 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 266 transitions. [2023-11-06 23:10:18,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:18,605 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 266 transitions. [2023-11-06 23:10:18,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 23:10:18,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:18,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:10:18,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:10:18,607 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 23:10:18,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:18,608 INFO L85 PathProgramCache]: Analyzing trace with hash 889937946, now seen corresponding path program 1 times [2023-11-06 23:10:18,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:18,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739388760] [2023-11-06 23:10:18,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:18,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:18,667 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:10:18,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792729732] [2023-11-06 23:10:18,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:18,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:18,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:18,676 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:18,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:10:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:18,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:10:18,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:18,891 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 23:10:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:18,900 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:10:18,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:18,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739388760] [2023-11-06 23:10:18,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:10:18,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792729732] [2023-11-06 23:10:18,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792729732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:18,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:18,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:10:18,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997651390] [2023-11-06 23:10:18,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:18,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:10:18,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:18,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:10:18,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:10:18,910 INFO L87 Difference]: Start difference. First operand 236 states and 266 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2023-11-06 23:10:19,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:19,114 INFO L93 Difference]: Finished difference Result 235 states and 265 transitions. [2023-11-06 23:10:19,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:10:19,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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 [2023-11-06 23:10:19,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:19,117 INFO L225 Difference]: With dead ends: 235 [2023-11-06 23:10:19,117 INFO L226 Difference]: Without dead ends: 235 [2023-11-06 23:10:19,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:10:19,119 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 5 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:19,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 437 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:10:19,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-11-06 23:10:19,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2023-11-06 23:10:19,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 135 states have (on average 1.7851851851851852) internal successors, (241), 220 states have internal predecessors, (241), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 23:10:19,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 265 transitions. [2023-11-06 23:10:19,135 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 265 transitions. Word has length 6 [2023-11-06 23:10:19,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:19,136 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 265 transitions. [2023-11-06 23:10:19,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2023-11-06 23:10:19,136 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 265 transitions. [2023-11-06 23:10:19,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 23:10:19,136 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:19,137 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:19,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:19,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 23:10:19,342 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 23:10:19,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:19,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1818272976, now seen corresponding path program 1 times [2023-11-06 23:10:19,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:19,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790769900] [2023-11-06 23:10:19,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:19,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:19,357 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:10:19,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138107505] [2023-11-06 23:10:19,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:19,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:19,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:19,359 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:19,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:10:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:19,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 23:10:19,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:19,550 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 23:10:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:19,594 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:10:19,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:19,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790769900] [2023-11-06 23:10:19,596 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:10:19,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138107505] [2023-11-06 23:10:19,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138107505] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:19,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:19,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:10:19,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994201488] [2023-11-06 23:10:19,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:19,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:10:19,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:19,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:10:19,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:10:19,606 INFO L87 Difference]: Start difference. First operand 235 states and 265 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2023-11-06 23:10:19,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:19,814 INFO L93 Difference]: Finished difference Result 244 states and 274 transitions. [2023-11-06 23:10:19,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:10:19,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2023-11-06 23:10:19,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:19,817 INFO L225 Difference]: With dead ends: 244 [2023-11-06 23:10:19,817 INFO L226 Difference]: Without dead ends: 244 [2023-11-06 23:10:19,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:10:19,819 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 12 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:19,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 693 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:10:19,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-11-06 23:10:19,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2023-11-06 23:10:19,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 143 states have (on average 1.7482517482517483) internal successors, (250), 228 states have internal predecessors, (250), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 23:10:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 274 transitions. [2023-11-06 23:10:19,849 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 274 transitions. Word has length 7 [2023-11-06 23:10:19,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:19,852 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 274 transitions. [2023-11-06 23:10:19,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2023-11-06 23:10:19,853 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 274 transitions. [2023-11-06 23:10:19,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-06 23:10:19,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:19,857 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:19,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:20,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:20,064 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 23:10:20,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:20,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1632464615, now seen corresponding path program 1 times [2023-11-06 23:10:20,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:20,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514518097] [2023-11-06 23:10:20,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:20,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:20,103 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:10:20,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312715462] [2023-11-06 23:10:20,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:20,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:20,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:20,105 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:20,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:10:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:20,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 23:10:20,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:20,409 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-11-06 23:10:20,516 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-06 23:10:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-06 23:10:20,709 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:10:20,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:20,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514518097] [2023-11-06 23:10:20,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:10:20,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312715462] [2023-11-06 23:10:20,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312715462] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:20,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:20,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:10:20,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677069406] [2023-11-06 23:10:20,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:20,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:10:20,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:20,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:10:20,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:10:20,714 INFO L87 Difference]: Start difference. First operand 244 states and 274 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 23:10:22,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:10:24,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:10:26,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:10:27,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:27,277 INFO L93 Difference]: Finished difference Result 256 states and 286 transitions. [2023-11-06 23:10:27,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:10:27,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2023-11-06 23:10:27,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:27,280 INFO L225 Difference]: With dead ends: 256 [2023-11-06 23:10:27,281 INFO L226 Difference]: Without dead ends: 246 [2023-11-06 23:10:27,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:10:27,282 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 7 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 5 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:27,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 948 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 103 Invalid, 3 Unknown, 0 Unchecked, 6.4s Time] [2023-11-06 23:10:27,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-11-06 23:10:27,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2023-11-06 23:10:27,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 145 states have (on average 1.7379310344827585) internal successors, (252), 230 states have internal predecessors, (252), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 23:10:27,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 276 transitions. [2023-11-06 23:10:27,306 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 276 transitions. Word has length 66 [2023-11-06 23:10:27,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:27,307 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 276 transitions. [2023-11-06 23:10:27,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 23:10:27,307 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 276 transitions. [2023-11-06 23:10:27,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-06 23:10:27,312 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:27,312 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:27,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:27,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:27,521 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 23:10:27,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:27,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1536774091, now seen corresponding path program 1 times [2023-11-06 23:10:27,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:27,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556336456] [2023-11-06 23:10:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:27,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:27,562 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:10:27,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754594964] [2023-11-06 23:10:27,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:27,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:27,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:27,565 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:27,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:10:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:27,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 23:10:27,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:27,943 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:10:27,977 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-06 23:10:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 92 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-06 23:10:28,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 48 proven. 12 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-11-06 23:10:28,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:28,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556336456] [2023-11-06 23:10:28,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:10:28,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754594964] [2023-11-06 23:10:28,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754594964] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:28,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:10:28,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-11-06 23:10:28,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235790495] [2023-11-06 23:10:28,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:28,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 23:10:28,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:28,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 23:10:28,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:10:28,389 INFO L87 Difference]: Start difference. First operand 246 states and 276 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-06 23:10:28,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:28,862 INFO L93 Difference]: Finished difference Result 272 states and 304 transitions. [2023-11-06 23:10:28,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 23:10:28,863 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 71 [2023-11-06 23:10:28,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:28,864 INFO L225 Difference]: With dead ends: 272 [2023-11-06 23:10:28,865 INFO L226 Difference]: Without dead ends: 252 [2023-11-06 23:10:28,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2023-11-06 23:10:28,866 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 12 mSDsluCounter, 1637 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1896 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:28,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1896 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:10:28,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-11-06 23:10:28,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2023-11-06 23:10:28,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 151 states have (on average 1.7086092715231789) internal successors, (258), 236 states have internal predecessors, (258), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 23:10:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 282 transitions. [2023-11-06 23:10:28,876 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 282 transitions. Word has length 71 [2023-11-06 23:10:28,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:28,876 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 282 transitions. [2023-11-06 23:10:28,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-06 23:10:28,876 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 282 transitions. [2023-11-06 23:10:28,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-06 23:10:28,878 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:28,878 INFO L195 NwaCegarLoop]: trace histogram [20, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:28,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:29,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:29,090 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 23:10:29,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:29,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1330470809, now seen corresponding path program 2 times [2023-11-06 23:10:29,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:29,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071440691] [2023-11-06 23:10:29,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:29,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:29,141 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:10:29,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203201560] [2023-11-06 23:10:29,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:10:29,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:29,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:29,142 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:29,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:10:29,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:10:29,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:29,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 23:10:29,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:29,978 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:10:30,007 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-06 23:10:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 224 proven. 76 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-06 23:10:30,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 111 proven. 42 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-11-06 23:10:30,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:30,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071440691] [2023-11-06 23:10:30,605 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:10:30,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203201560] [2023-11-06 23:10:30,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203201560] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:30,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:10:30,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2023-11-06 23:10:30,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635090257] [2023-11-06 23:10:30,606 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:30,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 23:10:30,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:30,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 23:10:30,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:10:30,608 INFO L87 Difference]: Start difference. First operand 252 states and 282 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-06 23:10:31,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:31,331 INFO L93 Difference]: Finished difference Result 280 states and 314 transitions. [2023-11-06 23:10:31,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 23:10:31,332 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 86 [2023-11-06 23:10:31,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:31,334 INFO L225 Difference]: With dead ends: 280 [2023-11-06 23:10:31,334 INFO L226 Difference]: Without dead ends: 260 [2023-11-06 23:10:31,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2023-11-06 23:10:31,335 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 17 mSDsluCounter, 2675 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2934 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:31,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2934 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:10:31,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-06 23:10:31,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2023-11-06 23:10:31,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 159 states have (on average 1.6729559748427674) internal successors, (266), 244 states have internal predecessors, (266), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 23:10:31,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 290 transitions. [2023-11-06 23:10:31,346 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 290 transitions. Word has length 86 [2023-11-06 23:10:31,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:31,348 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 290 transitions. [2023-11-06 23:10:31,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-06 23:10:31,349 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 290 transitions. [2023-11-06 23:10:31,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-06 23:10:31,356 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:31,356 INFO L195 NwaCegarLoop]: trace histogram [40, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:31,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:31,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:31,568 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 23:10:31,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:31,569 INFO L85 PathProgramCache]: Analyzing trace with hash 239276519, now seen corresponding path program 3 times [2023-11-06 23:10:31,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:31,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026812574] [2023-11-06 23:10:31,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:31,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:31,629 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:10:31,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423508155] [2023-11-06 23:10:31,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:10:31,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:31,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:31,631 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:31,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:10:31,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:10:31,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:31,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 23:10:31,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:31,921 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 23:10:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1070 trivial. 0 not checked. [2023-11-06 23:10:31,943 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:10:31,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:31,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026812574] [2023-11-06 23:10:31,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:10:31,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423508155] [2023-11-06 23:10:31,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423508155] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:31,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:31,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:10:31,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164772949] [2023-11-06 23:10:31,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:31,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:10:31,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:31,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:10:31,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:10:31,947 INFO L87 Difference]: Start difference. First operand 260 states and 290 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-06 23:10:32,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:32,126 INFO L93 Difference]: Finished difference Result 259 states and 289 transitions. [2023-11-06 23:10:32,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:10:32,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 106 [2023-11-06 23:10:32,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:32,129 INFO L225 Difference]: With dead ends: 259 [2023-11-06 23:10:32,129 INFO L226 Difference]: Without dead ends: 259 [2023-11-06 23:10:32,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:10:32,130 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 12 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:32,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 680 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:10:32,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-11-06 23:10:32,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2023-11-06 23:10:32,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 159 states have (on average 1.6666666666666667) internal successors, (265), 243 states have internal predecessors, (265), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 23:10:32,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 289 transitions. [2023-11-06 23:10:32,140 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 289 transitions. Word has length 106 [2023-11-06 23:10:32,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:32,141 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 289 transitions. [2023-11-06 23:10:32,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-06 23:10:32,142 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 289 transitions. [2023-11-06 23:10:32,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-06 23:10:32,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:32,143 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:32,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:32,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 23:10:32,350 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 23:10:32,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:32,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1881445206, now seen corresponding path program 1 times [2023-11-06 23:10:32,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:32,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076460109] [2023-11-06 23:10:32,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:32,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:32,430 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:10:32,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982970199] [2023-11-06 23:10:32,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:32,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:32,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:32,434 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:32,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:10:32,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:32,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 1249 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 23:10:32,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:33,057 WARN L861 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2023-11-06 23:10:33,124 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-06 23:10:33,124 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-06 23:10:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 709 proven. 1 refuted. 0 times theorem prover too weak. 754 trivial. 87 not checked. [2023-11-06 23:10:33,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:33,494 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 23:10:33,494 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-11-06 23:10:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 709 proven. 88 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2023-11-06 23:10:33,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:33,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076460109] [2023-11-06 23:10:33,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:10:33,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982970199] [2023-11-06 23:10:33,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982970199] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:33,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:10:33,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2023-11-06 23:10:33,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194553854] [2023-11-06 23:10:33,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:33,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:10:33,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:33,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:10:33,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=129, Unknown=1, NotChecked=22, Total=182 [2023-11-06 23:10:33,525 INFO L87 Difference]: Start difference. First operand 259 states and 289 transitions. Second operand has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-06 23:10:34,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:34,420 INFO L93 Difference]: Finished difference Result 358 states and 408 transitions. [2023-11-06 23:10:34,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:10:34,422 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 121 [2023-11-06 23:10:34,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:34,426 INFO L225 Difference]: With dead ends: 358 [2023-11-06 23:10:34,427 INFO L226 Difference]: Without dead ends: 358 [2023-11-06 23:10:34,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 225 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=218, Unknown=1, NotChecked=30, Total=306 [2023-11-06 23:10:34,431 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 136 mSDsluCounter, 1455 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1668 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:34,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 1668 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 886 Invalid, 0 Unknown, 375 Unchecked, 0.7s Time] [2023-11-06 23:10:34,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2023-11-06 23:10:34,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 257. [2023-11-06 23:10:34,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 159 states have (on average 1.6540880503144655) internal successors, (263), 241 states have internal predecessors, (263), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 23:10:34,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 287 transitions. [2023-11-06 23:10:34,446 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 287 transitions. Word has length 121 [2023-11-06 23:10:34,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:34,447 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 287 transitions. [2023-11-06 23:10:34,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-06 23:10:34,448 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 287 transitions. [2023-11-06 23:10:34,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-06 23:10:34,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:34,473 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:34,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:34,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:34,674 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 23:10:34,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:34,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1881445205, now seen corresponding path program 1 times [2023-11-06 23:10:34,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:34,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967389527] [2023-11-06 23:10:34,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:34,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:34,760 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:10:34,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698224934] [2023-11-06 23:10:34,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:34,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:34,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:34,762 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:34,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:10:38,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:38,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 1249 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-06 23:10:38,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:38,216 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:10:45,341 WARN L861 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-06 23:10:45,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:10:45,466 INFO L351 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 18 treesize of output 13 [2023-11-06 23:10:45,481 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:10:45,481 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 23:10:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 590 proven. 316 refuted. 0 times theorem prover too weak. 494 trivial. 151 not checked. [2023-11-06 23:10:45,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:45,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:45,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967389527] [2023-11-06 23:10:45,738 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:10:45,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698224934] [2023-11-06 23:10:45,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698224934] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:45,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:10:45,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-11-06 23:10:45,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272259715] [2023-11-06 23:10:45,739 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:45,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 23:10:45,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:45,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 23:10:45,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=4, NotChecked=54, Total=870 [2023-11-06 23:10:45,741 INFO L87 Difference]: Start difference. First operand 257 states and 287 transitions. Second operand has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:10:47,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:10:49,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:10:52,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:10:54,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:10:56,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:10:58,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:11:00,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:11:02,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:11:06,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:11:09,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:11:15,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:15,238 INFO L93 Difference]: Finished difference Result 356 states and 406 transitions. [2023-11-06 23:11:15,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 23:11:15,239 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 121 [2023-11-06 23:11:15,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:15,242 INFO L225 Difference]: With dead ends: 356 [2023-11-06 23:11:15,242 INFO L226 Difference]: Without dead ends: 356 [2023-11-06 23:11:15,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=168, Invalid=1636, Unknown=6, NotChecked=82, Total=1892 [2023-11-06 23:11:15,243 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 151 mSDsluCounter, 1564 mSDsCounter, 0 mSdLazyCounter, 3854 mSolverCounterSat, 13 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1690 SdHoareTripleChecker+Invalid, 4249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 3854 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 24.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:15,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 1690 Invalid, 4249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 3854 Invalid, 10 Unknown, 372 Unchecked, 24.2s Time] [2023-11-06 23:11:15,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2023-11-06 23:11:15,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 255. [2023-11-06 23:11:15,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 159 states have (on average 1.6415094339622642) internal successors, (261), 239 states have internal predecessors, (261), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 23:11:15,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 285 transitions. [2023-11-06 23:11:15,255 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 285 transitions. Word has length 121 [2023-11-06 23:11:15,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:15,256 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 285 transitions. [2023-11-06 23:11:15,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:11:15,256 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 285 transitions. [2023-11-06 23:11:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-06 23:11:15,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:15,258 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:15,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:15,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 23:11:15,472 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 23:11:15,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:15,473 INFO L85 PathProgramCache]: Analyzing trace with hash 112388875, now seen corresponding path program 1 times [2023-11-06 23:11:15,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:15,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289101042] [2023-11-06 23:11:15,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:15,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:15,552 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:11:15,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338021516] [2023-11-06 23:11:15,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:15,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:15,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:15,556 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:15,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:11:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:16,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 23:11:16,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:16,184 WARN L861 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2023-11-06 23:11:16,274 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-06 23:11:16,274 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-06 23:11:16,360 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-06 23:11:16,360 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-06 23:11:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 800 proven. 2 refuted. 0 times theorem prover too weak. 575 trivial. 174 not checked. [2023-11-06 23:11:16,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:16,914 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 23:11:16,915 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-11-06 23:11:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 800 proven. 176 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2023-11-06 23:11:16,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:16,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289101042] [2023-11-06 23:11:16,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:11:16,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338021516] [2023-11-06 23:11:16,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338021516] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:16,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:11:16,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2023-11-06 23:11:16,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955769415] [2023-11-06 23:11:16,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:16,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 23:11:16,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:16,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 23:11:16,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=153, Unknown=1, NotChecked=24, Total=210 [2023-11-06 23:11:16,934 INFO L87 Difference]: Start difference. First operand 255 states and 285 transitions. Second operand has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-06 23:11:17,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:17,930 INFO L93 Difference]: Finished difference Result 353 states and 403 transitions. [2023-11-06 23:11:17,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:11:17,931 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 123 [2023-11-06 23:11:17,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:17,934 INFO L225 Difference]: With dead ends: 353 [2023-11-06 23:11:17,934 INFO L226 Difference]: Without dead ends: 353 [2023-11-06 23:11:17,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 224 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=282, Unknown=1, NotChecked=34, Total=380 [2023-11-06 23:11:17,935 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 373 mSDsluCounter, 1550 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1752 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 370 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:17,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 1752 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 981 Invalid, 0 Unknown, 370 Unchecked, 0.8s Time] [2023-11-06 23:11:17,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-11-06 23:11:17,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 252. [2023-11-06 23:11:17,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 159 states have (on average 1.6226415094339623) internal successors, (258), 236 states have internal predecessors, (258), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 23:11:17,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 282 transitions. [2023-11-06 23:11:17,959 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 282 transitions. Word has length 123 [2023-11-06 23:11:17,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:17,960 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 282 transitions. [2023-11-06 23:11:17,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-06 23:11:17,961 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 282 transitions. [2023-11-06 23:11:17,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-06 23:11:17,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:17,962 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:17,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:18,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:11:18,178 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 23:11:18,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:18,178 INFO L85 PathProgramCache]: Analyzing trace with hash 112388876, now seen corresponding path program 1 times [2023-11-06 23:11:18,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:18,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597817383] [2023-11-06 23:11:18,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:18,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:18,260 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:11:18,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810396286] [2023-11-06 23:11:18,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:18,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:18,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:18,265 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:18,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:11:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:18,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 85 conjunts are in the unsatisfiable core [2023-11-06 23:11:18,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:18,957 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:11:28,222 WARN L861 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-06 23:11:28,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:11:28,387 INFO L351 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 18 treesize of output 13 [2023-11-06 23:11:28,414 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 23:11:28,414 INFO L351 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 17 treesize of output 21 [2023-11-06 23:11:29,700 WARN L861 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-06 23:11:29,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:11:29,951 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 23:11:29,976 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-06 23:11:29,976 INFO L351 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 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-06 23:11:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 670 proven. 194 refuted. 0 times theorem prover too weak. 334 trivial. 353 not checked. [2023-11-06 23:11:30,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:31,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:31,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597817383] [2023-11-06 23:11:31,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:11:31,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810396286] [2023-11-06 23:11:31,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810396286] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:31,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:11:31,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-11-06 23:11:31,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167079958] [2023-11-06 23:11:31,410 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:31,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 23:11:31,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:31,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 23:11:31,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=682, Unknown=6, NotChecked=106, Total=870 [2023-11-06 23:11:31,412 INFO L87 Difference]: Start difference. First operand 252 states and 282 transitions. Second operand has 28 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 23:11:33,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:11:35,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:11:37,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:11:39,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:11:42,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:11:44,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:11:46,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:11:48,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:11:52,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:12:00,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:00,215 INFO L93 Difference]: Finished difference Result 351 states and 401 transitions. [2023-11-06 23:12:00,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 23:12:00,216 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 123 [2023-11-06 23:12:00,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:00,219 INFO L225 Difference]: With dead ends: 351 [2023-11-06 23:12:00,219 INFO L226 Difference]: Without dead ends: 351 [2023-11-06 23:12:00,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=177, Invalid=1547, Unknown=6, NotChecked=162, Total=1892 [2023-11-06 23:12:00,221 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 166 mSDsluCounter, 1214 mSDsCounter, 0 mSdLazyCounter, 3546 mSolverCounterSat, 16 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 4306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 3546 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 735 IncrementalHoareTripleChecker+Unchecked, 23.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:00,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 1329 Invalid, 4306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 3546 Invalid, 9 Unknown, 735 Unchecked, 23.3s Time] [2023-11-06 23:12:00,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2023-11-06 23:12:00,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 250. [2023-11-06 23:12:00,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 159 states have (on average 1.610062893081761) internal successors, (256), 234 states have internal predecessors, (256), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 23:12:00,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 280 transitions. [2023-11-06 23:12:00,237 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 280 transitions. Word has length 123 [2023-11-06 23:12:00,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:00,237 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 280 transitions. [2023-11-06 23:12:00,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 23:12:00,238 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 280 transitions. [2023-11-06 23:12:00,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-06 23:12:00,251 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:00,252 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:00,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:00,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:00,461 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 23:12:00,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:00,462 INFO L85 PathProgramCache]: Analyzing trace with hash -158311287, now seen corresponding path program 1 times [2023-11-06 23:12:00,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:00,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349197544] [2023-11-06 23:12:00,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:00,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:00,538 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:12:00,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178726388] [2023-11-06 23:12:00,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:00,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:00,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:00,541 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:00,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:12:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:01,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-06 23:12:01,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:01,267 WARN L861 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#valid| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|))) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-06 23:12:01,371 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-06 23:12:01,371 INFO L351 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 [2023-11-06 23:12:01,518 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-06 23:12:01,520 INFO L351 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 [2023-11-06 23:12:01,553 WARN L861 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2023-11-06 23:12:01,596 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-06 23:12:01,596 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-06 23:12:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 713 proven. 1 refuted. 0 times theorem prover too weak. 398 trivial. 439 not checked. [2023-11-06 23:12:01,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:01,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:01,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349197544] [2023-11-06 23:12:01,922 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:12:01,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178726388] [2023-11-06 23:12:01,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178726388] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:01,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:12:01,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-11-06 23:12:01,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113376273] [2023-11-06 23:12:01,923 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:01,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:12:01,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:01,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:12:01,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=179, Unknown=2, NotChecked=54, Total=272 [2023-11-06 23:12:01,925 INFO L87 Difference]: Start difference. First operand 250 states and 280 transitions. Second operand has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:12:02,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:02,635 INFO L93 Difference]: Finished difference Result 348 states and 398 transitions. [2023-11-06 23:12:02,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:12:02,635 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 130 [2023-11-06 23:12:02,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:02,638 INFO L225 Difference]: With dead ends: 348 [2023-11-06 23:12:02,638 INFO L226 Difference]: Without dead ends: 348 [2023-11-06 23:12:02,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 141 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=317, Unknown=2, NotChecked=74, Total=462 [2023-11-06 23:12:02,640 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 276 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 1553 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 729 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:02,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 1553 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 871 Invalid, 0 Unknown, 729 Unchecked, 0.6s Time] [2023-11-06 23:12:02,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-06 23:12:02,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 247. [2023-11-06 23:12:02,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 159 states have (on average 1.5911949685534592) internal successors, (253), 231 states have internal predecessors, (253), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 23:12:02,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 277 transitions. [2023-11-06 23:12:02,652 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 277 transitions. Word has length 130 [2023-11-06 23:12:02,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:02,653 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 277 transitions. [2023-11-06 23:12:02,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:12:02,653 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 277 transitions. [2023-11-06 23:12:02,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-06 23:12:02,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:02,655 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:02,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:02,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:02,862 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 23:12:02,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:02,863 INFO L85 PathProgramCache]: Analyzing trace with hash -158311286, now seen corresponding path program 1 times [2023-11-06 23:12:02,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:02,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408961553] [2023-11-06 23:12:02,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:02,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:02,951 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:12:02,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1784816587] [2023-11-06 23:12:02,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:02,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:02,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:02,954 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:02,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:12:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:05,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 103 conjunts are in the unsatisfiable core [2023-11-06 23:12:05,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:05,939 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:12:17,592 WARN L861 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#valid| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|))) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-06 23:12:17,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:12:17,845 INFO L351 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 18 treesize of output 13 [2023-11-06 23:12:17,875 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-06 23:12:17,876 INFO L351 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 [2023-11-06 23:12:18,274 WARN L861 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-06 23:12:18,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:12:18,547 INFO L351 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 18 treesize of output 13 [2023-11-06 23:12:18,563 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 23:12:18,564 INFO L351 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 17 treesize of output 21 [2023-11-06 23:12:19,724 WARN L861 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-06 23:12:19,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:12:19,813 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 23:12:19,849 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-06 23:12:19,849 INFO L351 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 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-06 23:12:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 468 proven. 191 refuted. 0 times theorem prover too weak. 176 trivial. 716 not checked. [2023-11-06 23:12:21,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:21,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:21,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408961553] [2023-11-06 23:12:21,824 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:12:21,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784816587] [2023-11-06 23:12:21,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784816587] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:21,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:12:21,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2023-11-06 23:12:21,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264244673] [2023-11-06 23:12:21,825 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:21,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 23:12:21,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:21,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 23:12:21,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=908, Unknown=6, NotChecked=186, Total=1190 [2023-11-06 23:12:21,827 INFO L87 Difference]: Start difference. First operand 247 states and 277 transitions. Second operand has 33 states, 32 states have (on average 2.5625) internal successors, (82), 31 states have internal predecessors, (82), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 23:12:23,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:12:25,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:12:28,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:12:30,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:12:34,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:12:36,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:12:38,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:12:43,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:12:45,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:12:47,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:12:51,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:13:02,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:13:02,619 INFO L93 Difference]: Finished difference Result 345 states and 395 transitions. [2023-11-06 23:13:02,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 23:13:02,619 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.5625) internal successors, (82), 31 states have internal predecessors, (82), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 130 [2023-11-06 23:13:02,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:13:02,622 INFO L225 Difference]: With dead ends: 345 [2023-11-06 23:13:02,622 INFO L226 Difference]: Without dead ends: 345 [2023-11-06 23:13:02,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=209, Invalid=2050, Unknown=9, NotChecked=282, Total=2550 [2023-11-06 23:13:02,624 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 192 mSDsluCounter, 1568 mSDsCounter, 0 mSdLazyCounter, 4821 mSolverCounterSat, 17 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 1673 SdHoareTripleChecker+Invalid, 5933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 4821 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 1084 IncrementalHoareTripleChecker+Unchecked, 28.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:13:02,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 1673 Invalid, 5933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 4821 Invalid, 11 Unknown, 1084 Unchecked, 28.4s Time] [2023-11-06 23:13:02,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2023-11-06 23:13:02,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 244. [2023-11-06 23:13:02,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 159 states have (on average 1.5723270440251573) internal successors, (250), 228 states have internal predecessors, (250), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 23:13:02,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 274 transitions. [2023-11-06 23:13:02,634 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 274 transitions. Word has length 130 [2023-11-06 23:13:02,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:13:02,634 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 274 transitions. [2023-11-06 23:13:02,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.5625) internal successors, (82), 31 states have internal predecessors, (82), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 23:13:02,635 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 274 transitions. [2023-11-06 23:13:02,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-06 23:13:02,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:13:02,636 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:13:02,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:13:02,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:13:02,844 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 23:13:02,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:13:02,845 INFO L85 PathProgramCache]: Analyzing trace with hash -612682567, now seen corresponding path program 1 times [2023-11-06 23:13:02,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:13:02,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225617592] [2023-11-06 23:13:02,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:02,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:13:02,906 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:13:02,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096800441] [2023-11-06 23:13:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:02,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:13:02,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:13:02,908 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:13:02,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:13:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:06,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 1320 conjuncts, 89 conjunts are in the unsatisfiable core [2023-11-06 23:13:06,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:13:07,013 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:13:15,127 WARN L861 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-06 23:13:15,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:13:15,354 INFO L351 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 18 treesize of output 13 [2023-11-06 23:13:15,465 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 23:13:15,466 INFO L351 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 17 treesize of output 21 [2023-11-06 23:13:16,361 WARN L861 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-06 23:13:16,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:13:16,510 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 23:13:16,529 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-06 23:13:16,529 INFO L351 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 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-06 23:13:18,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 618 proven. 254 refuted. 0 times theorem prover too weak. 290 trivial. 389 not checked. [2023-11-06 23:13:18,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:13:18,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:13:18,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225617592] [2023-11-06 23:13:18,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:13:18,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096800441] [2023-11-06 23:13:18,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096800441] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:13:18,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:13:18,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2023-11-06 23:13:18,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969907769] [2023-11-06 23:13:18,629 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 23:13:18,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 23:13:18,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:13:18,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 23:13:18,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=848, Unknown=4, NotChecked=118, Total=1056 [2023-11-06 23:13:18,632 INFO L87 Difference]: Start difference. First operand 244 states and 274 transitions. Second operand has 31 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 23:13:20,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:13:22,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:13:25,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:13:27,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:13:31,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:13:33,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:13:36,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:13:38,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:13:42,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:13:47,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 23:13:55,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:13:55,838 INFO L93 Difference]: Finished difference Result 346 states and 397 transitions. [2023-11-06 23:13:55,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 23:13:55,839 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 131 [2023-11-06 23:13:55,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:13:55,841 INFO L225 Difference]: With dead ends: 346 [2023-11-06 23:13:55,842 INFO L226 Difference]: Without dead ends: 346 [2023-11-06 23:13:55,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=8, NotChecked=174, Total=2162 [2023-11-06 23:13:55,843 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 177 mSDsluCounter, 1431 mSDsCounter, 0 mSdLazyCounter, 3815 mSolverCounterSat, 14 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 4566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3815 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 727 IncrementalHoareTripleChecker+Unchecked, 24.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:13:55,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 1545 Invalid, 4566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3815 Invalid, 10 Unknown, 727 Unchecked, 24.9s Time] [2023-11-06 23:13:55,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-11-06 23:13:55,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 243. [2023-11-06 23:13:55,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 159 states have (on average 1.5660377358490567) internal successors, (249), 227 states have internal predecessors, (249), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 23:13:55,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 273 transitions. [2023-11-06 23:13:55,854 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 273 transitions. Word has length 131 [2023-11-06 23:13:55,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:13:55,854 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 273 transitions. [2023-11-06 23:13:55,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 23:13:55,855 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 273 transitions. [2023-11-06 23:13:55,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-06 23:13:55,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:13:55,856 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:13:55,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 23:13:56,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:13:56,072 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 23:13:56,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:13:56,073 INFO L85 PathProgramCache]: Analyzing trace with hash 474607905, now seen corresponding path program 1 times [2023-11-06 23:13:56,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:13:56,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610801971] [2023-11-06 23:13:56,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:56,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:13:56,141 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:13:56,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488894335] [2023-11-06 23:13:56,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:56,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:13:56,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:13:56,144 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:13:56,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 23:13:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:56,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 1358 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-06 23:13:56,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:13:56,924 WARN L861 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-06 23:13:57,016 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 23:13:57,016 INFO L351 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 17 treesize of output 21 [2023-11-06 23:13:57,081 WARN L861 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#valid| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|))) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-06 23:13:57,182 INFO L322 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2023-11-06 23:13:57,182 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 28 [2023-11-06 23:13:57,374 INFO L322 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2023-11-06 23:13:57,374 INFO L351 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 2 case distinctions, treesize of input 19 treesize of output 25 [2023-11-06 23:13:57,502 WARN L861 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2023-11-06 23:13:57,568 INFO L322 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2023-11-06 23:13:57,568 INFO L351 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 3 case distinctions, treesize of input 31 treesize of output 52 [2023-11-06 23:13:57,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 448 proven. 93 refuted. 0 times theorem prover too weak. 223 trivial. 787 not checked. [2023-11-06 23:13:57,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:13:58,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:13:58,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610801971] [2023-11-06 23:13:58,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:13:58,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488894335] [2023-11-06 23:13:58,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488894335] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:13:58,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:13:58,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-11-06 23:13:58,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979045673] [2023-11-06 23:13:58,076 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 23:13:58,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 23:13:58,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:13:58,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 23:13:58,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=408, Unknown=3, NotChecked=126, Total=600 [2023-11-06 23:13:58,078 INFO L87 Difference]: Start difference. First operand 243 states and 273 transitions. Second operand has 23 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 20 states have internal predecessors, (83), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-06 23:13:59,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:13:59,314 INFO L93 Difference]: Finished difference Result 341 states and 391 transitions. [2023-11-06 23:13:59,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 23:13:59,315 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 20 states have internal predecessors, (83), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 137 [2023-11-06 23:13:59,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:13:59,317 INFO L225 Difference]: With dead ends: 341 [2023-11-06 23:13:59,317 INFO L226 Difference]: Without dead ends: 341 [2023-11-06 23:13:59,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=658, Unknown=3, NotChecked=162, Total=930 [2023-11-06 23:13:59,319 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 310 mSDsluCounter, 2242 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 2424 SdHoareTripleChecker+Invalid, 2591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1073 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:13:59,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 2424 Invalid, 2591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1484 Invalid, 0 Unknown, 1073 Unchecked, 1.0s Time] [2023-11-06 23:13:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2023-11-06 23:13:59,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 240. [2023-11-06 23:13:59,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 159 states have (on average 1.5471698113207548) internal successors, (246), 224 states have internal predecessors, (246), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 23:13:59,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 270 transitions. [2023-11-06 23:13:59,348 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 270 transitions. Word has length 137 [2023-11-06 23:13:59,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:13:59,348 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 270 transitions. [2023-11-06 23:13:59,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 20 states have internal predecessors, (83), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-06 23:13:59,349 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 270 transitions. [2023-11-06 23:13:59,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-06 23:13:59,350 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:13:59,350 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:13:59,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:13:59,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:13:59,560 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 23:13:59,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:13:59,561 INFO L85 PathProgramCache]: Analyzing trace with hash 474607906, now seen corresponding path program 1 times [2023-11-06 23:13:59,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:13:59,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337687940] [2023-11-06 23:13:59,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:59,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:13:59,625 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:13:59,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [356614900] [2023-11-06 23:13:59,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:59,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:13:59,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:13:59,627 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:13:59,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ae592b-01f9-47c5-af16-94500855e797/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 23:14:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:06,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 1358 conjuncts, 154 conjunts are in the unsatisfiable core [2023-11-06 23:14:06,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:14:06,137 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:14:18,389 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 23:14:18,390 INFO L351 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 17 treesize of output 21 [2023-11-06 23:14:18,482 INFO L351 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 18 treesize of output 13 [2023-11-06 23:14:21,552 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 23:14:21,553 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2023-11-06 23:14:21,829 INFO L322 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-11-06 23:14:21,829 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2023-11-06 23:14:23,986 WARN L861 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-06 23:14:24,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:24,123 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 23:14:24,271 INFO L322 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-11-06 23:14:24,271 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2023-11-06 23:14:25,392 WARN L861 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~size#1| Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (|zalloc_or_die_calloc_model_~nmemb#1| Int)) (let ((.cse1 (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) (.cse0 (* |zalloc_or_die_calloc_model_~nmemb#1| |zalloc_or_die_calloc_model_~size#1|))) (and (<= (mod .cse0 4294967296) .cse1) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| .cse1) |c_#length|) (= |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| .cse0)))) is different from true