./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.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_a72d52b2-a904-4d65-89af-06ee82b342d5/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72d52b2-a904-4d65-89af-06ee82b342d5/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72d52b2-a904-4d65-89af-06ee82b342d5/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72d52b2-a904-4d65-89af-06ee82b342d5/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72d52b2-a904-4d65-89af-06ee82b342d5/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72d52b2-a904-4d65-89af-06ee82b342d5/bin/uautomizer-verify-BQ2R08f2Ya --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 7f7f7b6ea5abe354543dc816b244a5041021350ff4076c6fd52a8208b97eac31 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:03:38,471 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:03:38,535 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72d52b2-a904-4d65-89af-06ee82b342d5/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:03:38,539 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:03:38,540 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:03:38,565 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:03:38,565 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:03:38,566 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:03:38,566 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:03:38,567 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:03:38,568 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:03:38,568 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:03:38,569 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:03:38,569 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:03:38,570 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:03:38,570 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:03:38,571 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:03:38,571 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:03:38,572 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:03:38,572 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:03:38,573 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:03:38,578 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:03:38,579 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:03:38,579 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:03:38,579 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:03:38,580 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:03:38,580 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:03:38,580 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:03:38,581 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:03:38,581 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:03:38,581 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:03:38,582 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:03:38,582 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:03:38,582 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:03:38,582 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:03:38,583 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:03:38,583 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:03:38,583 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:03:38,583 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:03:38,583 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:03:38,584 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:03:38,584 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:03:38,584 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_a72d52b2-a904-4d65-89af-06ee82b342d5/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72d52b2-a904-4d65-89af-06ee82b342d5/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f7f7b6ea5abe354543dc816b244a5041021350ff4076c6fd52a8208b97eac31 [2023-11-29 02:03:38,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:03:38,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:03:38,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:03:38,833 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:03:38,833 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:03:38,834 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72d52b2-a904-4d65-89af-06ee82b342d5/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i [2023-11-29 02:03:41,535 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:03:41,781 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:03:41,782 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72d52b2-a904-4d65-89af-06ee82b342d5/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i [2023-11-29 02:03:41,797 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72d52b2-a904-4d65-89af-06ee82b342d5/bin/uautomizer-verify-BQ2R08f2Ya/data/d8c62ebb6/29ab1bdd316f463287874b08afeec34b/FLAGd9aca8d17 [2023-11-29 02:03:41,811 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72d52b2-a904-4d65-89af-06ee82b342d5/bin/uautomizer-verify-BQ2R08f2Ya/data/d8c62ebb6/29ab1bdd316f463287874b08afeec34b [2023-11-29 02:03:41,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:03:41,815 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:03:41,816 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:03:41,816 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:03:41,821 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:03:41,822 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:03:41" (1/1) ... [2023-11-29 02:03:41,823 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@538439d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:41, skipping insertion in model container [2023-11-29 02:03:41,823 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:03:41" (1/1) ... [2023-11-29 02:03:41,871 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:03:42,182 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_a72d52b2-a904-4d65-89af-06ee82b342d5/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i[31306,31319] [2023-11-29 02:03:42,193 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:03:42,203 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:03:42,243 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_a72d52b2-a904-4d65-89af-06ee82b342d5/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i[31306,31319] [2023-11-29 02:03:42,246 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:03:42,279 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:03:42,279 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:03:42,287 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:03:42,287 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:42 WrapperNode [2023-11-29 02:03:42,287 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:03:42,288 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:03:42,289 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:03:42,289 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:03:42,296 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:42" (1/1) ... [2023-11-29 02:03:42,311 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:42" (1/1) ... [2023-11-29 02:03:42,337 INFO L138 Inliner]: procedures = 179, calls = 49, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 189 [2023-11-29 02:03:42,337 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:03:42,338 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:03:42,338 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:03:42,338 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:03:42,349 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:42" (1/1) ... [2023-11-29 02:03:42,349 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:42" (1/1) ... [2023-11-29 02:03:42,353 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:42" (1/1) ... [2023-11-29 02:03:42,370 INFO L175 MemorySlicer]: Split 25 memory accesses to 5 slices as follows [2, 12, 4, 6, 1]. 48 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [2, 2, 1, 1, 0]. The 10 writes are split as follows [0, 5, 2, 2, 1]. [2023-11-29 02:03:42,370 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:42" (1/1) ... [2023-11-29 02:03:42,371 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:42" (1/1) ... [2023-11-29 02:03:42,379 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:42" (1/1) ... [2023-11-29 02:03:42,383 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:42" (1/1) ... [2023-11-29 02:03:42,385 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:42" (1/1) ... [2023-11-29 02:03:42,387 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:42" (1/1) ... [2023-11-29 02:03:42,391 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:03:42,392 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:03:42,392 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:03:42,392 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:03:42,393 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:42" (1/1) ... [2023-11-29 02:03:42,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:03:42,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72d52b2-a904-4d65-89af-06ee82b342d5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:03:42,424 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72d52b2-a904-4d65-89af-06ee82b342d5/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:03:42,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72d52b2-a904-4d65-89af-06ee82b342d5/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:03:42,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:03:42,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 02:03:42,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 02:03:42,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 02:03:42,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 02:03:42,468 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-29 02:03:42,468 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-29 02:03:42,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:03:42,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:03:42,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 02:03:42,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 02:03:42,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 02:03:42,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 02:03:42,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:03:42,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:03:42,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:03:42,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:03:42,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 02:03:42,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 02:03:42,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 02:03:42,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 02:03:42,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 02:03:42,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:03:42,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:03:42,473 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 02:03:42,621 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:03:42,623 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:03:42,885 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:03:43,129 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:03:43,129 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 02:03:43,130 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:03:43 BoogieIcfgContainer [2023-11-29 02:03:43,130 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:03:43,133 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:03:43,133 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:03:43,136 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:03:43,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:03:41" (1/3) ... [2023-11-29 02:03:43,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d9ae7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:03:43, skipping insertion in model container [2023-11-29 02:03:43,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:42" (2/3) ... [2023-11-29 02:03:43,138 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d9ae7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:03:43, skipping insertion in model container [2023-11-29 02:03:43,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:03:43" (3/3) ... [2023-11-29 02:03:43,139 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-2.i [2023-11-29 02:03:43,148 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 02:03:43,159 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:03:43,159 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:03:43,159 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 02:03:43,217 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 02:03:43,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 36 transitions, 76 flow [2023-11-29 02:03:43,281 INFO L124 PetriNetUnfolderBase]: 6/38 cut-off events. [2023-11-29 02:03:43,281 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:03:43,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 38 events. 6/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 29 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2023-11-29 02:03:43,284 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 36 transitions, 76 flow [2023-11-29 02:03:43,288 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 36 transitions, 76 flow [2023-11-29 02:03:43,298 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:03:43,304 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;@7c04109f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:03:43,305 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 02:03:43,309 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:03:43,310 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-11-29 02:03:43,310 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:03:43,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:03:43,311 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-29 02:03:43,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:03:43,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:03:43,316 INFO L85 PathProgramCache]: Analyzing trace with hash 182114604, now seen corresponding path program 1 times [2023-11-29 02:03:43,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:03:43,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771231867] [2023-11-29 02:03:43,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:43,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:03:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:03:43,443 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 02:03:43,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:03:43,487 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 02:03:43,489 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 02:03:43,490 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-29 02:03:43,492 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-29 02:03:43,492 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-29 02:03:43,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:03:43,493 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-29 02:03:43,496 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 02:03:43,497 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-29 02:03:43,556 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 02:03:43,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 67 transitions, 144 flow [2023-11-29 02:03:43,581 INFO L124 PetriNetUnfolderBase]: 12/72 cut-off events. [2023-11-29 02:03:43,581 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 02:03:43,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 72 events. 12/72 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 128 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 63. Up to 3 conditions per place. [2023-11-29 02:03:43,583 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 67 transitions, 144 flow [2023-11-29 02:03:43,585 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 67 transitions, 144 flow [2023-11-29 02:03:43,586 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:03:43,587 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;@7c04109f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:03:43,587 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-29 02:03:43,602 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:03:43,603 INFO L124 PetriNetUnfolderBase]: 1/23 cut-off events. [2023-11-29 02:03:43,603 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 02:03:43,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:03:43,603 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-29 02:03:43,603 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-29 02:03:43,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:03:43,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1326593866, now seen corresponding path program 1 times [2023-11-29 02:03:43,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:03:43,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403782616] [2023-11-29 02:03:43,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:43,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:03:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:03:43,634 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 02:03:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:03:43,663 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 02:03:43,663 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 02:03:43,663 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-29 02:03:43,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-29 02:03:43,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-29 02:03:43,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-29 02:03:43,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 02:03:43,665 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-29 02:03:43,665 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 02:03:43,665 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-29 02:03:43,741 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 02:03:43,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 98 transitions, 214 flow [2023-11-29 02:03:43,770 INFO L124 PetriNetUnfolderBase]: 18/106 cut-off events. [2023-11-29 02:03:43,770 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-29 02:03:43,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 106 events. 18/106 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 276 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-11-29 02:03:43,772 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 98 transitions, 214 flow [2023-11-29 02:03:43,774 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 98 transitions, 214 flow [2023-11-29 02:03:43,776 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:03:43,777 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;@7c04109f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:03:43,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-29 02:03:43,787 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:03:43,787 INFO L124 PetriNetUnfolderBase]: 1/36 cut-off events. [2023-11-29 02:03:43,787 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-29 02:03:43,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:03:43,788 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-29 02:03:43,788 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-29 02:03:43,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:03:43,789 INFO L85 PathProgramCache]: Analyzing trace with hash 601860523, now seen corresponding path program 1 times [2023-11-29 02:03:43,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:03:43,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728354616] [2023-11-29 02:03:43,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:43,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:03:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:03:43,818 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 02:03:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:03:43,844 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 02:03:43,844 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 02:03:43,845 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-29 02:03:43,845 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-29 02:03:43,845 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-29 02:03:43,845 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-29 02:03:43,846 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-29 02:03:43,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 02:03:43,846 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-29 02:03:43,847 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 02:03:43,847 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-29 02:03:43,938 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 02:03:43,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 129 transitions, 286 flow [2023-11-29 02:03:43,974 INFO L124 PetriNetUnfolderBase]: 24/140 cut-off events. [2023-11-29 02:03:43,974 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-29 02:03:43,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 140 events. 24/140 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 433 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 123. Up to 5 conditions per place. [2023-11-29 02:03:43,977 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 129 transitions, 286 flow [2023-11-29 02:03:43,980 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 129 transitions, 286 flow [2023-11-29 02:03:43,981 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:03:43,983 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;@7c04109f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:03:43,983 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-29 02:03:43,995 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:03:43,995 INFO L124 PetriNetUnfolderBase]: 4/61 cut-off events. [2023-11-29 02:03:43,995 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-29 02:03:43,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:03:43,996 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-11-29 02:03:43,996 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-29 02:03:43,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:03:43,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1400460916, now seen corresponding path program 1 times [2023-11-29 02:03:43,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:03:43,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187873381] [2023-11-29 02:03:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:43,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:03:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:03:44,023 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 02:03:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:03:44,048 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 02:03:44,049 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 02:03:44,049 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-29 02:03:44,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-29 02:03:44,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-29 02:03:44,050 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-29 02:03:44,050 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-29 02:03:44,050 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-29 02:03:44,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 02:03:44,050 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-29 02:03:44,051 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 02:03:44,051 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-29 02:03:44,177 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 02:03:44,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 160 transitions, 360 flow [2023-11-29 02:03:44,218 INFO L124 PetriNetUnfolderBase]: 30/174 cut-off events. [2023-11-29 02:03:44,218 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-29 02:03:44,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 174 events. 30/174 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 581 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 158. Up to 6 conditions per place. [2023-11-29 02:03:44,222 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 160 transitions, 360 flow [2023-11-29 02:03:44,225 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 160 transitions, 360 flow [2023-11-29 02:03:44,227 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:03:44,228 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;@7c04109f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:03:44,228 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-29 02:03:44,242 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:03:44,242 INFO L124 PetriNetUnfolderBase]: 7/77 cut-off events. [2023-11-29 02:03:44,242 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-29 02:03:44,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:03:44,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:03:44,243 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-29 02:03:44,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:03:44,243 INFO L85 PathProgramCache]: Analyzing trace with hash 664856193, now seen corresponding path program 1 times [2023-11-29 02:03:44,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:03:44,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631108077] [2023-11-29 02:03:44,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:44,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:03:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:03:44,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:03:44,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631108077] [2023-11-29 02:03:44,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631108077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:03:44,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:03:44,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:03:44,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315785749] [2023-11-29 02:03:44,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:03:44,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:03:44,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:03:44,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:03:44,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:03:44,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 160 [2023-11-29 02:03:44,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 160 transitions, 360 flow. Second operand has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 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) [2023-11-29 02:03:44,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:03:44,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 160 [2023-11-29 02:03:44,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand