./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 cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0235-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:18:20,358 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:18:20,477 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:18:20,486 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:18:20,487 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:18:20,529 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:18:20,530 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:18:20,530 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:18:20,531 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:18:20,536 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:18:20,538 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:18:20,538 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:18:20,539 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:18:20,541 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:18:20,541 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:18:20,541 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:18:20,542 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:18:20,542 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:18:20,543 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:18:20,543 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:18:20,544 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:18:20,544 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:18:20,544 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:18:20,545 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:18:20,545 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:18:20,546 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:18:20,547 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:18:20,547 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:18:20,547 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:18:20,548 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:18:20,549 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:18:20,575 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:18:20,576 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:18:20,576 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:18:20,576 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:18:20,576 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:18:20,577 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:18:20,577 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:18:20,577 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_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 [2023-11-12 02:18:20,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:18:20,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:18:20,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:18:20,879 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:18:20,880 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:18:20,881 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/memsafety/test-0235-2.i [2023-11-12 02:18:23,940 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:18:24,237 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:18:24,237 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/sv-benchmarks/c/memsafety/test-0235-2.i [2023-11-12 02:18:24,269 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/data/4809184e9/948a9995c5ab47bdb5f457165c2291c5/FLAG98ee42304 [2023-11-12 02:18:24,284 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/data/4809184e9/948a9995c5ab47bdb5f457165c2291c5 [2023-11-12 02:18:24,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:18:24,289 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:18:24,290 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:18:24,290 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:18:24,296 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:18:24,297 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:18:24" (1/1) ... [2023-11-12 02:18:24,298 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@237208d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:24, skipping insertion in model container [2023-11-12 02:18:24,299 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:18:24" (1/1) ... [2023-11-12 02:18:24,379 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:18:24,843 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:18:24,860 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:18:24,940 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:18:24,991 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:18:24,991 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:24 WrapperNode [2023-11-12 02:18:24,991 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:18:24,992 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:18:24,993 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:18:24,993 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:18:25,001 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:24" (1/1) ... [2023-11-12 02:18:25,020 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:24" (1/1) ... [2023-11-12 02:18:25,068 INFO L138 Inliner]: procedures = 188, calls = 71, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 246 [2023-11-12 02:18:25,068 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:18:25,071 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:18:25,074 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:18:25,075 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:18:25,085 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:24" (1/1) ... [2023-11-12 02:18:25,085 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:24" (1/1) ... [2023-11-12 02:18:25,092 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:24" (1/1) ... [2023-11-12 02:18:25,092 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:24" (1/1) ... [2023-11-12 02:18:25,107 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:24" (1/1) ... [2023-11-12 02:18:25,113 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:24" (1/1) ... [2023-11-12 02:18:25,133 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:24" (1/1) ... [2023-11-12 02:18:25,136 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:24" (1/1) ... [2023-11-12 02:18:25,141 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:18:25,142 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:18:25,142 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:18:25,143 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:18:25,143 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:24" (1/1) ... [2023-11-12 02:18:25,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:18:25,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:25,182 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:18:25,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:18:25,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:18:25,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:18:25,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 02:18:25,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 02:18:25,228 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2023-11-12 02:18:25,229 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2023-11-12 02:18:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:18:25,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 02:18:25,230 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2023-11-12 02:18:25,231 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2023-11-12 02:18:25,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:18:25,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:18:25,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:18:25,422 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:18:25,424 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:18:26,224 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:18:26,242 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:18:26,245 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-12 02:18:26,248 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:18:26 BoogieIcfgContainer [2023-11-12 02:18:26,248 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:18:26,251 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:18:26,251 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:18:26,254 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:18:26,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:18:24" (1/3) ... [2023-11-12 02:18:26,255 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44fd1f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:18:26, skipping insertion in model container [2023-11-12 02:18:26,256 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:24" (2/3) ... [2023-11-12 02:18:26,256 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44fd1f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:18:26, skipping insertion in model container [2023-11-12 02:18:26,256 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:18:26" (3/3) ... [2023-11-12 02:18:26,258 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0235-2.i [2023-11-12 02:18:26,272 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:18:26,273 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 87 error locations. [2023-11-12 02:18:26,322 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:18:26,328 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;@690b3294, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:18:26,329 INFO L358 AbstractCegarLoop]: Starting to check reachability of 87 error locations. [2023-11-12 02:18:26,333 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) [2023-11-12 02:18:26,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 02:18:26,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:26,340 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 02:18:26,340 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)] === [2023-11-12 02:18:26,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:26,346 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2023-11-12 02:18:26,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:26,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483173439] [2023-11-12 02:18:26,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:26,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:26,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:26,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483173439] [2023-11-12 02:18:26,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483173439] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:26,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:26,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:18:26,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990388313] [2023-11-12 02:18:26,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:26,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:18:26,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:26,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:18:26,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:18:26,566 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) [2023-11-12 02:18:26,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:26,606 INFO L93 Difference]: Finished difference Result 238 states and 268 transitions. [2023-11-12 02:18:26,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:18:26,612 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 [2023-11-12 02:18:26,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:26,622 INFO L225 Difference]: With dead ends: 238 [2023-11-12 02:18:26,622 INFO L226 Difference]: Without dead ends: 236 [2023-11-12 02:18:26,624 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 [2023-11-12 02:18:26,628 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 [2023-11-12 02:18:26,629 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] [2023-11-12 02:18:26,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-11-12 02:18:26,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2023-11-12 02:18:26,684 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) [2023-11-12 02:18:26,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 266 transitions. [2023-11-12 02:18:26,691 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 266 transitions. Word has length 4 [2023-11-12 02:18:26,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:26,692 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 266 transitions. [2023-11-12 02:18:26,692 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) [2023-11-12 02:18:26,693 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 266 transitions. [2023-11-12 02:18:26,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 02:18:26,693 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:26,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 02:18:26,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:18:26,694 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)] === [2023-11-12 02:18:26,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:26,695 INFO L85 PathProgramCache]: Analyzing trace with hash 889937946, now seen corresponding path program 1 times [2023-11-12 02:18:26,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:26,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992046072] [2023-11-12 02:18:26,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:26,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:26,715 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:18:26,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472405845] [2023-11-12 02:18:26,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:26,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:26,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:26,720 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:26,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:18:26,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:26,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:18:26,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:26,936 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 [2023-11-12 02:18:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:26,946 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:18:26,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:26,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992046072] [2023-11-12 02:18:26,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:18:26,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472405845] [2023-11-12 02:18:26,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472405845] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:26,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:26,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:18:26,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144149832] [2023-11-12 02:18:26,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:26,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:18:26,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:26,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:18:26,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:18:26,951 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) [2023-11-12 02:18:27,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:27,108 INFO L93 Difference]: Finished difference Result 235 states and 265 transitions. [2023-11-12 02:18:27,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:18:27,108 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 [2023-11-12 02:18:27,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:27,111 INFO L225 Difference]: With dead ends: 235 [2023-11-12 02:18:27,112 INFO L226 Difference]: Without dead ends: 235 [2023-11-12 02:18:27,112 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 [2023-11-12 02:18:27,114 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, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:27,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 437 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:18:27,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-11-12 02:18:27,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2023-11-12 02:18:27,132 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) [2023-11-12 02:18:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 265 transitions. [2023-11-12 02:18:27,137 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 265 transitions. Word has length 6 [2023-11-12 02:18:27,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:27,137 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 265 transitions. [2023-11-12 02:18:27,138 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) [2023-11-12 02:18:27,138 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 265 transitions. [2023-11-12 02:18:27,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 02:18:27,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:27,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:27,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:27,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:27,351 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)] === [2023-11-12 02:18:27,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:27,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1818272976, now seen corresponding path program 1 times [2023-11-12 02:18:27,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:27,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80987274] [2023-11-12 02:18:27,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:27,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:27,372 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:18:27,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323943716] [2023-11-12 02:18:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:27,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:27,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:27,375 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:27,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:18:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:27,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 02:18:27,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:27,601 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-12 02:18:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:27,643 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:18:27,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:27,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80987274] [2023-11-12 02:18:27,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:18:27,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323943716] [2023-11-12 02:18:27,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323943716] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:27,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:27,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:18:27,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045470482] [2023-11-12 02:18:27,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:27,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:18:27,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:27,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:18:27,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:18:27,656 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) [2023-11-12 02:18:27,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:27,885 INFO L93 Difference]: Finished difference Result 244 states and 274 transitions. [2023-11-12 02:18:27,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:18:27,886 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 [2023-11-12 02:18:27,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:27,888 INFO L225 Difference]: With dead ends: 244 [2023-11-12 02:18:27,889 INFO L226 Difference]: Without dead ends: 244 [2023-11-12 02:18:27,889 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 [2023-11-12 02:18:27,892 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 [2023-11-12 02:18:27,896 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] [2023-11-12 02:18:27,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-11-12 02:18:27,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2023-11-12 02:18:27,916 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) [2023-11-12 02:18:27,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 274 transitions. [2023-11-12 02:18:27,920 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 274 transitions. Word has length 7 [2023-11-12 02:18:27,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:27,920 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 274 transitions. [2023-11-12 02:18:27,921 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) [2023-11-12 02:18:27,921 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 274 transitions. [2023-11-12 02:18:27,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-12 02:18:27,923 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:27,924 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] [2023-11-12 02:18:27,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:28,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:28,130 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)] === [2023-11-12 02:18:28,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:28,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1632464615, now seen corresponding path program 1 times [2023-11-12 02:18:28,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:28,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013197993] [2023-11-12 02:18:28,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:28,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:28,173 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:18:28,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364112718] [2023-11-12 02:18:28,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:28,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:28,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:28,175 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:28,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:18:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:28,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 02:18:28,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:28,512 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 [2023-11-12 02:18:28,670 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 [2023-11-12 02:18:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-12 02:18:28,932 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:18:28,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:28,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013197993] [2023-11-12 02:18:28,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:18:28,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364112718] [2023-11-12 02:18:28,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364112718] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:28,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:28,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:18:28,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241203215] [2023-11-12 02:18:28,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:28,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:18:28,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:28,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:18:28,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:18:28,938 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) [2023-11-12 02:18:30,961 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] [2023-11-12 02:18:32,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:32,048 INFO L93 Difference]: Finished difference Result 256 states and 286 transitions. [2023-11-12 02:18:32,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:18:32,049 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 [2023-11-12 02:18:32,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:32,051 INFO L225 Difference]: With dead ends: 256 [2023-11-12 02:18:32,052 INFO L226 Difference]: Without dead ends: 246 [2023-11-12 02:18:32,052 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 [2023-11-12 02:18:32,053 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 7 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:32,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 948 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 104 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2023-11-12 02:18:32,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-11-12 02:18:32,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2023-11-12 02:18:32,066 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) [2023-11-12 02:18:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 276 transitions. [2023-11-12 02:18:32,069 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 276 transitions. Word has length 66 [2023-11-12 02:18:32,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:32,070 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 276 transitions. [2023-11-12 02:18:32,070 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) [2023-11-12 02:18:32,070 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 276 transitions. [2023-11-12 02:18:32,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-12 02:18:32,073 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:32,073 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] [2023-11-12 02:18:32,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:32,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:32,280 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)] === [2023-11-12 02:18:32,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:32,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1536774091, now seen corresponding path program 1 times [2023-11-12 02:18:32,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:32,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355715532] [2023-11-12 02:18:32,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:32,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:32,341 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:18:32,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791015057] [2023-11-12 02:18:32,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:32,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:32,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:32,343 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:32,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:18:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:32,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-12 02:18:32,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:32,714 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:18:32,746 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 [2023-11-12 02:18:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 92 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-12 02:18:32,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 48 proven. 12 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-11-12 02:18:33,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:33,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355715532] [2023-11-12 02:18:33,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:18:33,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791015057] [2023-11-12 02:18:33,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791015057] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:33,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:18:33,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-11-12 02:18:33,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243999301] [2023-11-12 02:18:33,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:33,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:18:33,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:33,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:18:33,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:18:33,113 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) [2023-11-12 02:18:33,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:33,584 INFO L93 Difference]: Finished difference Result 272 states and 304 transitions. [2023-11-12 02:18:33,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:18:33,585 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 [2023-11-12 02:18:33,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:33,587 INFO L225 Difference]: With dead ends: 272 [2023-11-12 02:18:33,587 INFO L226 Difference]: Without dead ends: 252 [2023-11-12 02:18:33,587 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 [2023-11-12 02:18:33,588 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 [2023-11-12 02:18:33,589 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] [2023-11-12 02:18:33,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-11-12 02:18:33,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2023-11-12 02:18:33,598 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) [2023-11-12 02:18:33,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 282 transitions. [2023-11-12 02:18:33,602 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 282 transitions. Word has length 71 [2023-11-12 02:18:33,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:33,602 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 282 transitions. [2023-11-12 02:18:33,602 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) [2023-11-12 02:18:33,602 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 282 transitions. [2023-11-12 02:18:33,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-12 02:18:33,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:33,606 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] [2023-11-12 02:18:33,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:33,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:33,815 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)] === [2023-11-12 02:18:33,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:33,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1330470809, now seen corresponding path program 2 times [2023-11-12 02:18:33,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:33,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860286576] [2023-11-12 02:18:33,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:33,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:33,898 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:18:33,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291007203] [2023-11-12 02:18:33,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:18:33,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:33,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:33,900 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:33,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:18:34,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:18:34,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:18:34,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-12 02:18:34,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:34,948 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:18:34,978 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 [2023-11-12 02:18:35,140 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 224 proven. 76 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-12 02:18:35,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 111 proven. 42 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-11-12 02:18:35,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:35,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860286576] [2023-11-12 02:18:35,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:18:35,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291007203] [2023-11-12 02:18:35,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291007203] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:35,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:18:35,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2023-11-12 02:18:35,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407579730] [2023-11-12 02:18:35,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:35,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 02:18:35,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:35,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 02:18:35,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-11-12 02:18:35,562 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) [2023-11-12 02:18:36,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:36,257 INFO L93 Difference]: Finished difference Result 280 states and 314 transitions. [2023-11-12 02:18:36,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:18:36,258 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 [2023-11-12 02:18:36,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:36,260 INFO L225 Difference]: With dead ends: 280 [2023-11-12 02:18:36,260 INFO L226 Difference]: Without dead ends: 260 [2023-11-12 02:18:36,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2023-11-12 02:18:36,261 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, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:36,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2934 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:18:36,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-12 02:18:36,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2023-11-12 02:18:36,274 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) [2023-11-12 02:18:36,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 290 transitions. [2023-11-12 02:18:36,277 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 290 transitions. Word has length 86 [2023-11-12 02:18:36,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:36,277 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 290 transitions. [2023-11-12 02:18:36,278 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) [2023-11-12 02:18:36,278 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 290 transitions. [2023-11-12 02:18:36,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-12 02:18:36,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:36,280 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] [2023-11-12 02:18:36,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:36,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:18:36,492 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)] === [2023-11-12 02:18:36,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:36,493 INFO L85 PathProgramCache]: Analyzing trace with hash 239276519, now seen corresponding path program 3 times [2023-11-12 02:18:36,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:36,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30598243] [2023-11-12 02:18:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:36,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:36,568 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:18:36,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174998014] [2023-11-12 02:18:36,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:18:36,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:36,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:36,572 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:36,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:18:36,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:18:36,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:18:36,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 02:18:36,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:36,849 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-12 02:18:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1070 trivial. 0 not checked. [2023-11-12 02:18:36,874 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:18:36,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:36,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30598243] [2023-11-12 02:18:36,874 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:18:36,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174998014] [2023-11-12 02:18:36,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174998014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:36,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:36,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:18:36,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770129900] [2023-11-12 02:18:36,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:36,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:18:36,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:36,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:18:36,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:18:36,876 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) [2023-11-12 02:18:37,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:37,044 INFO L93 Difference]: Finished difference Result 259 states and 289 transitions. [2023-11-12 02:18:37,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:18:37,045 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 [2023-11-12 02:18:37,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:37,048 INFO L225 Difference]: With dead ends: 259 [2023-11-12 02:18:37,048 INFO L226 Difference]: Without dead ends: 259 [2023-11-12 02:18:37,048 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 [2023-11-12 02:18:37,049 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, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:37,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 680 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:18:37,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-11-12 02:18:37,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2023-11-12 02:18:37,056 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) [2023-11-12 02:18:37,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 289 transitions. [2023-11-12 02:18:37,059 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 289 transitions. Word has length 106 [2023-11-12 02:18:37,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:37,060 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 289 transitions. [2023-11-12 02:18:37,060 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) [2023-11-12 02:18:37,061 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 289 transitions. [2023-11-12 02:18:37,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-12 02:18:37,062 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:37,063 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] [2023-11-12 02:18:37,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:37,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:18:37,269 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)] === [2023-11-12 02:18:37,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:37,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1881445206, now seen corresponding path program 1 times [2023-11-12 02:18:37,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:37,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852116326] [2023-11-12 02:18:37,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:37,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:37,361 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:18:37,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499830987] [2023-11-12 02:18:37,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:37,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:37,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:37,365 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:37,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:18:37,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:37,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 1249 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 02:18:37,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:37,936 WARN L876 $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 [2023-11-12 02:18:37,988 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-12 02:18:37,989 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 [2023-11-12 02:18:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 709 proven. 1 refuted. 0 times theorem prover too weak. 754 trivial. 87 not checked. [2023-11-12 02:18:38,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:38,356 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 02:18:38,357 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 [2023-11-12 02:18:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 709 proven. 88 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2023-11-12 02:18:38,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:38,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852116326] [2023-11-12 02:18:38,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:18:38,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499830987] [2023-11-12 02:18:38,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499830987] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:38,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:18:38,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2023-11-12 02:18:38,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795103225] [2023-11-12 02:18:38,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:38,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 02:18:38,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:38,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 02:18:38,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=129, Unknown=1, NotChecked=22, Total=182 [2023-11-12 02:18:38,388 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) [2023-11-12 02:18:39,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:39,283 INFO L93 Difference]: Finished difference Result 358 states and 408 transitions. [2023-11-12 02:18:39,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:18:39,284 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 [2023-11-12 02:18:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:39,288 INFO L225 Difference]: With dead ends: 358 [2023-11-12 02:18:39,288 INFO L226 Difference]: Without dead ends: 358 [2023-11-12 02:18:39,288 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 [2023-11-12 02:18:39,289 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 [2023-11-12 02:18:39,289 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] [2023-11-12 02:18:39,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2023-11-12 02:18:39,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 257. [2023-11-12 02:18:39,299 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) [2023-11-12 02:18:39,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 287 transitions. [2023-11-12 02:18:39,302 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 287 transitions. Word has length 121 [2023-11-12 02:18:39,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:39,303 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 287 transitions. [2023-11-12 02:18:39,303 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) [2023-11-12 02:18:39,303 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 287 transitions. [2023-11-12 02:18:39,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-12 02:18:39,310 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:39,311 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] [2023-11-12 02:18:39,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:39,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 02:18:39,519 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)] === [2023-11-12 02:18:39,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:39,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1881445205, now seen corresponding path program 1 times [2023-11-12 02:18:39,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:39,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646714658] [2023-11-12 02:18:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:39,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:39,591 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:18:39,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367705260] [2023-11-12 02:18:39,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:39,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:39,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:39,593 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:39,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7d0234-eb80-485b-a86d-262d274e62b6/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:18:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:43,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 1249 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-12 02:18:43,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:43,380 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:18:54,665 WARN L876 $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 [2023-11-12 02:18:54,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:18:54,775 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 [2023-11-12 02:18:54,791 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:18:54,791 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 [2023-11-12 02:18:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 590 proven. 316 refuted. 0 times theorem prover too weak. 494 trivial. 151 not checked. [2023-11-12 02:18:54,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:55,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:55,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646714658] [2023-11-12 02:18:55,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:18:55,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367705260] [2023-11-12 02:18:55,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367705260] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:55,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:18:55,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-11-12 02:18:55,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049984017] [2023-11-12 02:18:55,062 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:55,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-12 02:18:55,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:55,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-12 02:18:55,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=734, Unknown=6, NotChecked=54, Total=870 [2023-11-12 02:18:55,064 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) [2023-11-12 02:18:57,122 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] [2023-11-12 02:18:59,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-12 02:19:01,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-12 02:19:05,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-12 02:19:09,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-12 02:19:13,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-12 02:19:15,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-12 02:19:19,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-12 02:19:21,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-12 02:19:24,035 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]