./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/dll_of_dll-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/heap-manipulation/dll_of_dll-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0e14b8baad7c8f50637b16b3adcb891ef363d7563e7c4e0e74695e7b8e3d1787 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:01:40,873 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:01:41,002 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 12:01:41,016 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:01:41,017 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:01:41,059 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:01:41,060 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:01:41,061 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:01:41,062 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:01:41,067 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:01:41,068 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:01:41,069 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:01:41,070 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:01:41,072 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:01:41,072 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:01:41,073 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:01:41,073 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:01:41,074 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:01:41,074 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:01:41,075 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:01:41,077 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:01:41,077 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:01:41,078 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:01:41,078 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:01:41,079 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:01:41,079 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:01:41,080 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:01:41,081 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:01:41,081 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:01:41,082 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:01:41,083 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:01:41,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:01:41,084 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:01:41,084 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:01:41,084 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:01:41,084 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:01:41,085 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:01:41,085 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:01:41,085 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:01:41,085 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:01:41,086 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:01:41,086 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:01:41,086 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_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e14b8baad7c8f50637b16b3adcb891ef363d7563e7c4e0e74695e7b8e3d1787 [2023-11-26 12:01:41,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:01:41,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:01:41,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:01:41,490 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:01:41,490 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:01:41,491 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/heap-manipulation/dll_of_dll-1.i [2023-11-26 12:01:44,606 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:01:44,890 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:01:44,890 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/sv-benchmarks/c/heap-manipulation/dll_of_dll-1.i [2023-11-26 12:01:44,906 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/data/ec67a9588/fde7139186ab4506890a1d77611c7647/FLAG526368cb4 [2023-11-26 12:01:44,922 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/data/ec67a9588/fde7139186ab4506890a1d77611c7647 [2023-11-26 12:01:44,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:01:44,926 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:01:44,928 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:01:44,928 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:01:44,934 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:01:44,935 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:01:44" (1/1) ... [2023-11-26 12:01:44,936 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eaa171a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:44, skipping insertion in model container [2023-11-26 12:01:44,937 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:01:44" (1/1) ... [2023-11-26 12:01:44,990 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:01:45,303 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/sv-benchmarks/c/heap-manipulation/dll_of_dll-1.i[22634,22647] [2023-11-26 12:01:45,403 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:01:45,415 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:01:45,450 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/sv-benchmarks/c/heap-manipulation/dll_of_dll-1.i[22634,22647] [2023-11-26 12:01:45,470 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:01:45,519 WARN L675 CHandler]: The function insert_fnc is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:01:45,528 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:01:45,528 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:45 WrapperNode [2023-11-26 12:01:45,528 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:01:45,530 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:01:45,531 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:01:45,531 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:01:45,539 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:45" (1/1) ... [2023-11-26 12:01:45,578 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:45" (1/1) ... [2023-11-26 12:01:45,611 INFO L138 Inliner]: procedures = 140, calls = 94, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 230 [2023-11-26 12:01:45,612 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:01:45,613 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:01:45,613 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:01:45,613 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:01:45,626 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:45" (1/1) ... [2023-11-26 12:01:45,627 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:45" (1/1) ... [2023-11-26 12:01:45,633 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:45" (1/1) ... [2023-11-26 12:01:45,698 INFO L175 MemorySlicer]: Split 48 memory accesses to 3 slices as follows [2, 40, 6]. 83 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 13 writes are split as follows [0, 11, 2]. [2023-11-26 12:01:45,699 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:45" (1/1) ... [2023-11-26 12:01:45,699 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:45" (1/1) ... [2023-11-26 12:01:45,719 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:45" (1/1) ... [2023-11-26 12:01:45,727 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:45" (1/1) ... [2023-11-26 12:01:45,730 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:45" (1/1) ... [2023-11-26 12:01:45,733 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:45" (1/1) ... [2023-11-26 12:01:45,739 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:01:45,744 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:01:45,744 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:01:45,745 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:01:45,745 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:45" (1/1) ... [2023-11-26 12:01:45,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:01:45,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:45,790 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:01:45,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:01:45,849 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-11-26 12:01:45,849 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-11-26 12:01:45,849 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_base [2023-11-26 12:01:45,849 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_base [2023-11-26 12:01:45,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 12:01:45,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:01:45,850 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_master [2023-11-26 12:01:45,850 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_master [2023-11-26 12:01:45,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 12:01:45,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 12:01:45,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-26 12:01:45,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-26 12:01:45,851 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-26 12:01:45,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-26 12:01:45,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 12:01:45,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-26 12:01:45,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-26 12:01:45,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 12:01:45,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-26 12:01:45,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-26 12:01:45,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-26 12:01:45,852 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_generic [2023-11-26 12:01:45,852 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_generic [2023-11-26 12:01:45,852 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_slave [2023-11-26 12:01:45,853 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_slave [2023-11-26 12:01:45,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:01:45,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 12:01:45,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 12:01:45,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:01:45,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:01:46,038 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:01:46,040 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:01:46,634 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:01:46,671 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:01:46,672 INFO L309 CfgBuilder]: Removed 38 assume(true) statements. [2023-11-26 12:01:46,672 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:01:46 BoogieIcfgContainer [2023-11-26 12:01:46,673 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:01:46,675 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:01:46,675 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:01:46,679 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:01:46,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:01:44" (1/3) ... [2023-11-26 12:01:46,680 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@352bf653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:01:46, skipping insertion in model container [2023-11-26 12:01:46,680 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:45" (2/3) ... [2023-11-26 12:01:46,681 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@352bf653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:01:46, skipping insertion in model container [2023-11-26 12:01:46,681 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:01:46" (3/3) ... [2023-11-26 12:01:46,682 INFO L112 eAbstractionObserver]: Analyzing ICFG dll_of_dll-1.i [2023-11-26 12:01:46,703 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:01:46,703 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 12:01:46,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:01:46,768 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@56ff7691, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:01:46,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 12:01:46,773 INFO L276 IsEmpty]: Start isEmpty. Operand has 117 states, 85 states have (on average 1.8) internal successors, (153), 105 states have internal predecessors, (153), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-26 12:01:46,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-26 12:01:46,784 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:46,785 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:46,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:46,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:46,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1364741834, now seen corresponding path program 1 times [2023-11-26 12:01:46,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:46,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867191926] [2023-11-26 12:01:46,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:46,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:47,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:01:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:47,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:01:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:47,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:01:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:47,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 12:01:47,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:47,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867191926] [2023-11-26 12:01:47,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867191926] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:01:47,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:01:47,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:01:47,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792576090] [2023-11-26 12:01:47,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:01:47,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:01:47,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:47,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:01:47,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:01:47,411 INFO L87 Difference]: Start difference. First operand has 117 states, 85 states have (on average 1.8) internal successors, (153), 105 states have internal predecessors, (153), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 12:01:47,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:47,681 INFO L93 Difference]: Finished difference Result 231 states and 409 transitions. [2023-11-26 12:01:47,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:01:47,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-11-26 12:01:47,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:47,695 INFO L225 Difference]: With dead ends: 231 [2023-11-26 12:01:47,695 INFO L226 Difference]: Without dead ends: 112 [2023-11-26 12:01:47,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:01:47,705 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 38 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:47,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 149 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:01:47,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-26 12:01:47,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2023-11-26 12:01:47,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 82 states have (on average 1.3048780487804879) internal successors, (107), 100 states have internal predecessors, (107), 24 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-26 12:01:47,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 141 transitions. [2023-11-26 12:01:47,761 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 141 transitions. Word has length 30 [2023-11-26 12:01:47,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:47,761 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 141 transitions. [2023-11-26 12:01:47,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 12:01:47,762 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 141 transitions. [2023-11-26 12:01:47,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-26 12:01:47,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:47,765 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:47,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 12:01:47,765 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:47,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:47,766 INFO L85 PathProgramCache]: Analyzing trace with hash 208543916, now seen corresponding path program 1 times [2023-11-26 12:01:47,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:47,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323121093] [2023-11-26 12:01:47,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:47,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:48,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:01:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:48,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:01:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:48,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:01:48,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 12:01:48,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:48,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323121093] [2023-11-26 12:01:48,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323121093] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:01:48,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904223369] [2023-11-26 12:01:48,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:48,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:48,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:48,905 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:48,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:01:49,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:49,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 12:01:49,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 12:01:49,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:01:49,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 12:01:49,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904223369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:01:49,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:01:49,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2023-11-26 12:01:49,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208341484] [2023-11-26 12:01:49,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:01:49,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:01:49,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:49,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:01:49,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:01:49,588 INFO L87 Difference]: Start difference. First operand 112 states and 141 transitions. Second operand has 7 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-26 12:01:50,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:50,103 INFO L93 Difference]: Finished difference Result 234 states and 308 transitions. [2023-11-26 12:01:50,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 12:01:50,106 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2023-11-26 12:01:50,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:50,112 INFO L225 Difference]: With dead ends: 234 [2023-11-26 12:01:50,112 INFO L226 Difference]: Without dead ends: 124 [2023-11-26 12:01:50,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-26 12:01:50,120 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 55 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:50,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 294 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 12:01:50,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-26 12:01:50,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-11-26 12:01:50,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 89 states have (on average 1.2921348314606742) internal successors, (115), 107 states have internal predecessors, (115), 27 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-26 12:01:50,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 155 transitions. [2023-11-26 12:01:50,158 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 155 transitions. Word has length 31 [2023-11-26 12:01:50,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:50,158 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 155 transitions. [2023-11-26 12:01:50,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-26 12:01:50,160 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 155 transitions. [2023-11-26 12:01:50,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-26 12:01:50,165 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:50,165 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:50,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:50,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:50,372 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:50,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:50,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1337816308, now seen corresponding path program 1 times [2023-11-26 12:01:50,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:50,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690402749] [2023-11-26 12:01:50,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:50,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:51,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:01:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:52,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:01:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:52,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:53,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-26 12:01:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:53,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-26 12:01:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:54,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:01:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:54,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:01:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:54,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-26 12:01:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:54,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:54,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-26 12:01:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:54,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-26 12:01:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:54,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:01:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:54,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:01:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 12 proven. 56 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-26 12:01:54,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:54,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690402749] [2023-11-26 12:01:54,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690402749] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:01:54,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241009012] [2023-11-26 12:01:54,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:54,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:54,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:54,595 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:54,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:01:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:55,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-26 12:01:55,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:55,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 12:01:55,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-26 12:01:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-26 12:01:55,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:01:56,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2023-11-26 12:01:56,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2023-11-26 12:01:56,207 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-11-26 12:01:56,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241009012] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:01:56,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:01:56,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 23 [2023-11-26 12:01:56,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143485375] [2023-11-26 12:01:56,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:01:56,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 12:01:56,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:56,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 12:01:56,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2023-11-26 12:01:56,213 INFO L87 Difference]: Start difference. First operand 124 states and 155 transitions. Second operand has 23 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 8 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2023-11-26 12:01:58,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:58,027 INFO L93 Difference]: Finished difference Result 317 states and 407 transitions. [2023-11-26 12:01:58,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-26 12:01:58,028 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 8 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 91 [2023-11-26 12:01:58,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:58,031 INFO L225 Difference]: With dead ends: 317 [2023-11-26 12:01:58,031 INFO L226 Difference]: Without dead ends: 197 [2023-11-26 12:01:58,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=141, Invalid=1265, Unknown=0, NotChecked=0, Total=1406 [2023-11-26 12:01:58,034 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 165 mSDsluCounter, 1348 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 1434 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:58,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 1434 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1404 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-26 12:01:58,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-11-26 12:01:58,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 158. [2023-11-26 12:01:58,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 121 states have (on average 1.2727272727272727) internal successors, (154), 137 states have internal predecessors, (154), 27 states have call successors, (27), 11 states have call predecessors, (27), 9 states have return successors, (14), 11 states have call predecessors, (14), 13 states have call successors, (14) [2023-11-26 12:01:58,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 195 transitions. [2023-11-26 12:01:58,074 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 195 transitions. Word has length 91 [2023-11-26 12:01:58,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:58,074 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 195 transitions. [2023-11-26 12:01:58,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 8 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2023-11-26 12:01:58,075 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 195 transitions. [2023-11-26 12:01:58,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-26 12:01:58,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:58,084 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:58,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:58,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:58,293 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:58,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:58,293 INFO L85 PathProgramCache]: Analyzing trace with hash 960775938, now seen corresponding path program 1 times [2023-11-26 12:01:58,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:58,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318618586] [2023-11-26 12:01:58,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:58,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:59,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:01:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:00,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:02:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:00,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:02:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:00,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-26 12:02:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:00,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-26 12:02:00,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:00,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:02:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:00,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:02:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:00,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-26 12:02:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:01,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:02:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:01,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-26 12:02:01,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:01,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-26 12:02:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:01,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:02:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:01,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:02:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:01,526 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 25 proven. 19 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-26 12:02:01,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:01,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318618586] [2023-11-26 12:02:01,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318618586] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:02:01,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003259936] [2023-11-26 12:02:01,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:01,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:01,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:01,529 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:01,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:02:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:02,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-26 12:02:02,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:02,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 12:02:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 29 proven. 23 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-26 12:02:02,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:02:03,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2023-11-26 12:02:03,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2023-11-26 12:02:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-26 12:02:03,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003259936] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:02:03,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:02:03,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 25 [2023-11-26 12:02:03,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256325443] [2023-11-26 12:02:03,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:02:03,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 12:02:03,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:03,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 12:02:03,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2023-11-26 12:02:03,200 INFO L87 Difference]: Start difference. First operand 158 states and 195 transitions. Second operand has 25 states, 20 states have (on average 2.8) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (15), 9 states have call predecessors, (15), 11 states have call successors, (15) [2023-11-26 12:02:04,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:02:04,765 INFO L93 Difference]: Finished difference Result 324 states and 402 transitions. [2023-11-26 12:02:04,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 12:02:04,766 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 2.8) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (15), 9 states have call predecessors, (15), 11 states have call successors, (15) Word has length 94 [2023-11-26 12:02:04,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:02:04,769 INFO L225 Difference]: With dead ends: 324 [2023-11-26 12:02:04,769 INFO L226 Difference]: Without dead ends: 169 [2023-11-26 12:02:04,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=256, Invalid=1466, Unknown=0, NotChecked=0, Total=1722 [2023-11-26 12:02:04,772 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 87 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:02:04,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 1299 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1262 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-26 12:02:04,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-26 12:02:04,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2023-11-26 12:02:04,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 127 states have (on average 1.2519685039370079) internal successors, (159), 144 states have internal predecessors, (159), 29 states have call successors, (29), 12 states have call predecessors, (29), 11 states have return successors, (18), 13 states have call predecessors, (18), 15 states have call successors, (18) [2023-11-26 12:02:04,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 206 transitions. [2023-11-26 12:02:04,795 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 206 transitions. Word has length 94 [2023-11-26 12:02:04,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:02:04,795 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 206 transitions. [2023-11-26 12:02:04,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 2.8) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (15), 9 states have call predecessors, (15), 11 states have call successors, (15) [2023-11-26 12:02:04,796 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 206 transitions. [2023-11-26 12:02:04,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-26 12:02:04,797 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:02:04,798 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:04,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 12:02:05,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231aadef-9d20-43db-811d-6f4dc005a702/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:05,014 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:02:05,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:05,015 INFO L85 PathProgramCache]: Analyzing trace with hash 67289600, now seen corresponding path program 1 times [2023-11-26 12:02:05,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:05,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986441762] [2023-11-26 12:02:05,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:05,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:10,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:02:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:13,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:02:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:14,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:02:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:14,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-26 12:02:15,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:15,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-26 12:02:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:25,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:02:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:25,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:02:25,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:25,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-26 12:02:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat