./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc 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_4a4f14dc-11d1-4c9f-88cd-cee8bd1425f4/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f14dc-11d1-4c9f-88cd-cee8bd1425f4/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_4a4f14dc-11d1-4c9f-88cd-cee8bd1425f4/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f14dc-11d1-4c9f-88cd-cee8bd1425f4/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f14dc-11d1-4c9f-88cd-cee8bd1425f4/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f14dc-11d1-4c9f-88cd-cee8bd1425f4/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a42fdc99fbc54512a7829bd297e0f02fe251a511098f304812399f6e9de1d8b6 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:02:08,108 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:02:08,200 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f14dc-11d1-4c9f-88cd-cee8bd1425f4/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-26 12:02:08,205 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:02:08,206 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:02:08,237 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:02:08,238 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:02:08,239 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:02:08,240 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:02:08,241 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:02:08,242 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:02:08,242 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:02:08,243 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:02:08,244 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:02:08,245 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:02:08,246 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:02:08,246 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:02:08,247 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:02:08,248 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:02:08,249 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:02:08,249 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:02:08,251 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:02:08,251 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:02:08,252 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:02:08,253 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-26 12:02:08,254 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 12:02:08,254 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:02:08,255 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:02:08,256 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:02:08,256 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:02:08,257 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:02:08,258 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:02:08,258 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:02:08,259 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:02:08,259 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:02:08,260 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:02:08,260 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:02:08,261 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:02:08,261 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:02:08,262 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:02:08,262 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:02:08,263 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:02:08,263 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:02:08,263 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:02:08,264 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_4a4f14dc-11d1-4c9f-88cd-cee8bd1425f4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f14dc-11d1-4c9f-88cd-cee8bd1425f4/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a42fdc99fbc54512a7829bd297e0f02fe251a511098f304812399f6e9de1d8b6 [2023-11-26 12:02:08,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:02:08,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:02:08,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:02:08,580 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:02:08,582 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:02:08,584 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f14dc-11d1-4c9f-88cd-cee8bd1425f4/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c [2023-11-26 12:02:12,179 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:02:12,445 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:02:12,448 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f14dc-11d1-4c9f-88cd-cee8bd1425f4/sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c [2023-11-26 12:02:12,462 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f14dc-11d1-4c9f-88cd-cee8bd1425f4/bin/uautomizer-verify-VRDe98Ueme/data/86b2af904/a10620b7467b423a8501d9334a6717bd/FLAGe5f65f930 [2023-11-26 12:02:12,479 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f14dc-11d1-4c9f-88cd-cee8bd1425f4/bin/uautomizer-verify-VRDe98Ueme/data/86b2af904/a10620b7467b423a8501d9334a6717bd [2023-11-26 12:02:12,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:02:12,484 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:02:12,486 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:02:12,486 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:02:12,493 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:02:12,494 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:02:12" (1/1) ... [2023-11-26 12:02:12,495 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d6ef16d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:12, skipping insertion in model container [2023-11-26 12:02:12,495 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:02:12" (1/1) ... [2023-11-26 12:02:12,549 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:02:12,802 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:02:12,820 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:02:12,868 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:02:12,878 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:02:12,878 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:02:12,887 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:02:12,888 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:12 WrapperNode [2023-11-26 12:02:12,888 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:02:12,889 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:02:12,889 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:02:12,890 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:02:12,898 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:12" (1/1) ... [2023-11-26 12:02:12,923 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:12" (1/1) ... [2023-11-26 12:02:12,976 INFO L138 Inliner]: procedures = 23, calls = 177, calls flagged for inlining = 29, calls inlined = 29, statements flattened = 426 [2023-11-26 12:02:12,976 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:02:12,977 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:02:12,978 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:02:12,978 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:02:12,995 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:12" (1/1) ... [2023-11-26 12:02:12,995 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:12" (1/1) ... [2023-11-26 12:02:13,001 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:12" (1/1) ... [2023-11-26 12:02:13,048 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-26 12:02:13,049 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:12" (1/1) ... [2023-11-26 12:02:13,049 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:12" (1/1) ... [2023-11-26 12:02:13,067 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:12" (1/1) ... [2023-11-26 12:02:13,071 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:12" (1/1) ... [2023-11-26 12:02:13,074 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:12" (1/1) ... [2023-11-26 12:02:13,076 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:12" (1/1) ... [2023-11-26 12:02:13,082 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:02:13,083 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:02:13,083 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:02:13,083 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:02:13,084 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:12" (1/1) ... [2023-11-26 12:02:13,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:02:13,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f14dc-11d1-4c9f-88cd-cee8bd1425f4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:13,121 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f14dc-11d1-4c9f-88cd-cee8bd1425f4/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:02:13,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f14dc-11d1-4c9f-88cd-cee8bd1425f4/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:02:13,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:02:13,158 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 12:02:13,158 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 12:02:13,159 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 12:02:13,159 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 12:02:13,159 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-26 12:02:13,159 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-26 12:02:13,162 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-26 12:02:13,162 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-26 12:02:13,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:02:13,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 12:02:13,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 12:02:13,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 12:02:13,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 12:02:13,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 12:02:13,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 12:02:13,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 12:02:13,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 12:02:13,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 12:02:13,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 12:02:13,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 12:02:13,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 12:02:13,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:02:13,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:02:13,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 12:02:13,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 12:02:13,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 12:02:13,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 12:02:13,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 12:02:13,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 12:02:13,170 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 12:02:13,311 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:02:13,313 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:02:14,065 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:02:14,583 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:02:14,583 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-26 12:02:14,584 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:02:14 BoogieIcfgContainer [2023-11-26 12:02:14,584 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:02:14,589 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:02:14,589 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:02:14,592 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:02:14,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:02:12" (1/3) ... [2023-11-26 12:02:14,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7103e7ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:02:14, skipping insertion in model container [2023-11-26 12:02:14,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:12" (2/3) ... [2023-11-26 12:02:14,594 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7103e7ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:02:14, skipping insertion in model container [2023-11-26 12:02:14,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:02:14" (3/3) ... [2023-11-26 12:02:14,597 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-bakery-4.wvr.c [2023-11-26 12:02:14,608 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 12:02:14,620 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:02:14,621 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-26 12:02:14,621 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 12:02:14,715 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-26 12:02:14,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 105 transitions, 238 flow [2023-11-26 12:02:14,824 INFO L124 PetriNetUnfolderBase]: 0/101 cut-off events. [2023-11-26 12:02:14,824 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-26 12:02:14,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 101 events. 0/101 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 307 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-11-26 12:02:14,826 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 105 transitions, 238 flow [2023-11-26 12:02:14,832 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 99 transitions, 219 flow [2023-11-26 12:02:14,843 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:02:14,851 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;@2aaa00c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:02:14,852 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2023-11-26 12:02:14,860 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 12:02:14,861 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-11-26 12:02:14,861 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 12:02:14,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:02:14,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:14,862 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-26 12:02:14,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:14,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1698778480, now seen corresponding path program 1 times [2023-11-26 12:02:14,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:14,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47207283] [2023-11-26 12:02:14,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:14,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:02:15,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:15,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47207283] [2023-11-26 12:02:15,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47207283] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:02:15,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:02:15,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:02:15,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071907634] [2023-11-26 12:02:15,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:02:15,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:02:15,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:15,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:02:15,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:02:15,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 105 [2023-11-26 12:02:15,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 99 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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) [2023-11-26 12:02:15,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:02:15,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 105 [2023-11-26 12:02:15,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand