./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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_b2484839-44c1-490f-a229-5a7f5307a5d8/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2484839-44c1-490f-a229-5a7f5307a5d8/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_b2484839-44c1-490f-a229-5a7f5307a5d8/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2484839-44c1-490f-a229-5a7f5307a5d8/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_b2484839-44c1-490f-a229-5a7f5307a5d8/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_b2484839-44c1-490f-a229-5a7f5307a5d8/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 a42fdc99fbc54512a7829bd297e0f02fe251a511098f304812399f6e9de1d8b6 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:05:42,831 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:05:42,905 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2484839-44c1-490f-a229-5a7f5307a5d8/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 12:05:42,910 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:05:42,911 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:05:42,938 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:05:42,939 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:05:42,939 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:05:42,940 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:05:42,941 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:05:42,942 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:05:42,942 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:05:42,943 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:05:42,944 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:05:42,945 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:05:42,945 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:05:42,946 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:05:42,947 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:05:42,947 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:05:42,948 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:05:42,949 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:05:42,950 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:05:42,950 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:05:42,951 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:05:42,952 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:05:42,952 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:05:42,953 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:05:42,954 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:05:42,954 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:05:42,955 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:05:42,955 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:05:42,956 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:05:42,957 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:05:42,957 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:05:42,958 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:05:42,958 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:05:42,959 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:05:42,959 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:05:42,960 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:05:42,960 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:05:42,960 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:05:42,961 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:05:42,962 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_b2484839-44c1-490f-a229-5a7f5307a5d8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2484839-44c1-490f-a229-5a7f5307a5d8/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a42fdc99fbc54512a7829bd297e0f02fe251a511098f304812399f6e9de1d8b6 [2023-11-26 12:05:43,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:05:43,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:05:43,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:05:43,274 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:05:43,275 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:05:43,276 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2484839-44c1-490f-a229-5a7f5307a5d8/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c [2023-11-26 12:05:46,499 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:05:46,812 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:05:46,813 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2484839-44c1-490f-a229-5a7f5307a5d8/sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c [2023-11-26 12:05:46,823 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2484839-44c1-490f-a229-5a7f5307a5d8/bin/uautomizer-verify-VRDe98Ueme/data/b405cb2b1/d11a35ebe42840a1991bc1812d7f56ed/FLAGe57933ebb [2023-11-26 12:05:46,838 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2484839-44c1-490f-a229-5a7f5307a5d8/bin/uautomizer-verify-VRDe98Ueme/data/b405cb2b1/d11a35ebe42840a1991bc1812d7f56ed [2023-11-26 12:05:46,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:05:46,842 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:05:46,844 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:05:46,844 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:05:46,850 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:05:46,851 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:46" (1/1) ... [2023-11-26 12:05:46,852 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1617356d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:46, skipping insertion in model container [2023-11-26 12:05:46,853 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:46" (1/1) ... [2023-11-26 12:05:46,887 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:05:47,104 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_b2484839-44c1-490f-a229-5a7f5307a5d8/sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c[8030,8043] [2023-11-26 12:05:47,110 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:05:47,121 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:05:47,172 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_b2484839-44c1-490f-a229-5a7f5307a5d8/sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c[8030,8043] [2023-11-26 12:05:47,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:05:47,187 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:05:47,187 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:05:47,196 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:05:47,196 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:47 WrapperNode [2023-11-26 12:05:47,196 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:05:47,198 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:05:47,198 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:05:47,198 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:05:47,207 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:47" (1/1) ... [2023-11-26 12:05:47,218 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:47" (1/1) ... [2023-11-26 12:05:47,264 INFO L138 Inliner]: procedures = 23, calls = 176, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 408 [2023-11-26 12:05:47,264 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:05:47,265 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:05:47,266 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:05:47,266 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:05:47,278 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:47" (1/1) ... [2023-11-26 12:05:47,279 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:47" (1/1) ... [2023-11-26 12:05:47,285 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:47" (1/1) ... [2023-11-26 12:05:47,315 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 12:05:47,315 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:47" (1/1) ... [2023-11-26 12:05:47,315 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:47" (1/1) ... [2023-11-26 12:05:47,345 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:47" (1/1) ... [2023-11-26 12:05:47,348 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:47" (1/1) ... [2023-11-26 12:05:47,351 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:47" (1/1) ... [2023-11-26 12:05:47,364 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:47" (1/1) ... [2023-11-26 12:05:47,369 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:05:47,375 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:05:47,376 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:05:47,377 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:05:47,378 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:47" (1/1) ... [2023-11-26 12:05:47,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:05:47,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2484839-44c1-490f-a229-5a7f5307a5d8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:47,411 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2484839-44c1-490f-a229-5a7f5307a5d8/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:05:47,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2484839-44c1-490f-a229-5a7f5307a5d8/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:05:47,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:05:47,468 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 12:05:47,468 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 12:05:47,468 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 12:05:47,468 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 12:05:47,469 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-26 12:05:47,471 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-26 12:05:47,471 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-26 12:05:47,472 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-26 12:05:47,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:05:47,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 12:05:47,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 12:05:47,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 12:05:47,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 12:05:47,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 12:05:47,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 12:05:47,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 12:05:47,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 12:05:47,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 12:05:47,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 12:05:47,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 12:05:47,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 12:05:47,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:05:47,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:05:47,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 12:05:47,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 12:05:47,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 12:05:47,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 12:05:47,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 12:05:47,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 12:05:47,480 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 12:05:47,669 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:05:47,671 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:05:48,237 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:05:48,832 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:05:48,833 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-26 12:05:48,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:48 BoogieIcfgContainer [2023-11-26 12:05:48,834 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:05:48,840 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:05:48,840 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:05:48,844 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:05:48,844 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:05:46" (1/3) ... [2023-11-26 12:05:48,845 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e032d9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:05:48, skipping insertion in model container [2023-11-26 12:05:48,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:47" (2/3) ... [2023-11-26 12:05:48,848 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e032d9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:05:48, skipping insertion in model container [2023-11-26 12:05:48,848 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:48" (3/3) ... [2023-11-26 12:05:48,849 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-bakery-4.wvr.c [2023-11-26 12:05:48,859 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 12:05:48,870 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:05:48,871 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 12:05:48,871 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 12:05:48,963 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-26 12:05:49,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 91 transitions, 210 flow [2023-11-26 12:05:49,065 INFO L124 PetriNetUnfolderBase]: 0/87 cut-off events. [2023-11-26 12:05:49,066 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-26 12:05:49,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 87 events. 0/87 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 209 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-11-26 12:05:49,068 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 91 transitions, 210 flow [2023-11-26 12:05:49,073 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 86 transitions, 196 flow [2023-11-26 12:05:49,083 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:05:49,090 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;@2650829d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:05:49,091 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-26 12:05:49,124 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 12:05:49,124 INFO L124 PetriNetUnfolderBase]: 0/85 cut-off events. [2023-11-26 12:05:49,124 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-26 12:05:49,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:05:49,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:49,126 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-26 12:05:49,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:49,132 INFO L85 PathProgramCache]: Analyzing trace with hash 586426824, now seen corresponding path program 1 times [2023-11-26 12:05:49,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:49,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841865506] [2023-11-26 12:05:49,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:49,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:50,286 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 12:05:50,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:50,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841865506] [2023-11-26 12:05:50,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841865506] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:50,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:05:50,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 12:05:50,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670695970] [2023-11-26 12:05:50,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:50,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 12:05:50,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:50,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 12:05:50,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-11-26 12:05:50,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 91 [2023-11-26 12:05:50,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 86 transitions, 196 flow. Second operand has 11 states, 11 states have (on average 38.18181818181818) internal successors, (420), 11 states have internal predecessors, (420), 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 12:05:50,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:05:50,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 91 [2023-11-26 12:05:50,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:06:12,435 INFO L124 PetriNetUnfolderBase]: 133004/192623 cut-off events. [2023-11-26 12:06:12,436 INFO L125 PetriNetUnfolderBase]: For 6659/6659 co-relation queries the response was YES. [2023-11-26 12:06:12,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377630 conditions, 192623 events. 133004/192623 cut-off events. For 6659/6659 co-relation queries the response was YES. Maximal size of possible extension queue 5156. Compared 1557027 event pairs, 45563 based on Foata normal form. 1/192053 useless extension candidates. Maximal degree in co-relation 340428. Up to 68429 conditions per place. [2023-11-26 12:06:13,803 INFO L140 encePairwiseOnDemand]: 81/91 looper letters, 328 selfloop transitions, 25 changer transitions 33/415 dead transitions. [2023-11-26 12:06:13,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 415 transitions, 1755 flow [2023-11-26 12:06:13,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 12:06:13,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-26 12:06:13,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 849 transitions. [2023-11-26 12:06:13,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6664050235478807 [2023-11-26 12:06:13,826 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 849 transitions. [2023-11-26 12:06:13,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 849 transitions. [2023-11-26 12:06:13,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:06:13,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 849 transitions. [2023-11-26 12:06:13,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 60.642857142857146) internal successors, (849), 14 states have internal predecessors, (849), 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 12:06:13,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 91.0) internal successors, (1365), 15 states have internal predecessors, (1365), 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 12:06:13,854 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 91.0) internal successors, (1365), 15 states have internal predecessors, (1365), 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 12:06:13,856 INFO L175 Difference]: Start difference. First operand has 99 places, 86 transitions, 196 flow. Second operand 14 states and 849 transitions. [2023-11-26 12:06:13,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 415 transitions, 1755 flow [2023-11-26 12:06:14,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 415 transitions, 1653 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-26 12:06:14,130 INFO L231 Difference]: Finished difference. Result has 109 places, 115 transitions, 335 flow [2023-11-26 12:06:14,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=335, PETRI_PLACES=109, PETRI_TRANSITIONS=115} [2023-11-26 12:06:14,137 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 10 predicate places. [2023-11-26 12:06:14,137 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 115 transitions, 335 flow [2023-11-26 12:06:14,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 38.18181818181818) internal successors, (420), 11 states have internal predecessors, (420), 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 12:06:14,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:06:14,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:14,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 12:06:14,139 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-26 12:06:14,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:14,140 INFO L85 PathProgramCache]: Analyzing trace with hash 975593174, now seen corresponding path program 2 times [2023-11-26 12:06:14,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:14,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086875079] [2023-11-26 12:06:14,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:14,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:15,166 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 12:06:15,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:15,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086875079] [2023-11-26 12:06:15,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086875079] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:06:15,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:06:15,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 12:06:15,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722338639] [2023-11-26 12:06:15,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:06:15,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 12:06:15,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:15,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 12:06:15,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-26 12:06:15,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 91 [2023-11-26 12:06:15,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 115 transitions, 335 flow. Second operand has 9 states, 9 states have (on average 34.888888888888886) internal successors, (314), 9 states have internal predecessors, (314), 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 12:06:15,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:06:15,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 91 [2023-11-26 12:06:15,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand