./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-barrier-loop.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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_d6030325-fe21-448f-a76e-a955d6cf7184/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6030325-fe21-448f-a76e-a955d6cf7184/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_d6030325-fe21-448f-a76e-a955d6cf7184/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6030325-fe21-448f-a76e-a955d6cf7184/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-barrier-loop.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6030325-fe21-448f-a76e-a955d6cf7184/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6030325-fe21-448f-a76e-a955d6cf7184/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a690a19e2d41bbc14b3960c21812e80405a4291ef4154c7125f66fa1ebbf9c8f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:23:42,073 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:23:42,167 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6030325-fe21-448f-a76e-a955d6cf7184/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 05:23:42,171 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:23:42,172 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:23:42,195 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:23:42,196 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:23:42,197 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:23:42,197 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:23:42,198 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:23:42,198 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:23:42,199 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:23:42,199 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:23:42,200 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:23:42,200 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:23:42,201 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:23:42,201 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:23:42,202 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:23:42,202 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:23:42,203 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:23:42,203 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 05:23:42,204 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 05:23:42,204 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 05:23:42,204 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:23:42,205 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 05:23:42,205 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 05:23:42,205 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:23:42,206 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:23:42,206 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:23:42,206 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:23:42,207 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:23:42,207 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:23:42,207 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:23:42,208 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:23:42,208 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:23:42,208 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:23:42,208 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:23:42,208 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:23:42,209 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:23:42,209 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:23:42,209 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:23:42,209 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_d6030325-fe21-448f-a76e-a955d6cf7184/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6030325-fe21-448f-a76e-a955d6cf7184/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a690a19e2d41bbc14b3960c21812e80405a4291ef4154c7125f66fa1ebbf9c8f [2023-11-29 05:23:42,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:23:42,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:23:42,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:23:42,462 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:23:42,463 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:23:42,464 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6030325-fe21-448f-a76e-a955d6cf7184/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/parallel-barrier-loop.wvr.c [2023-11-29 05:23:45,221 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:23:45,388 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:23:45,389 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6030325-fe21-448f-a76e-a955d6cf7184/sv-benchmarks/c/weaver/parallel-barrier-loop.wvr.c [2023-11-29 05:23:45,397 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6030325-fe21-448f-a76e-a955d6cf7184/bin/uautomizer-verify-BQ2R08f2Ya/data/530d014bb/16e4f8238f194616a08da1d68d07bb48/FLAGe790369aa [2023-11-29 05:23:45,412 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6030325-fe21-448f-a76e-a955d6cf7184/bin/uautomizer-verify-BQ2R08f2Ya/data/530d014bb/16e4f8238f194616a08da1d68d07bb48 [2023-11-29 05:23:45,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:23:45,416 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:23:45,418 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:23:45,418 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:23:45,423 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:23:45,424 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:23:45" (1/1) ... [2023-11-29 05:23:45,425 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bd03307 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:23:45, skipping insertion in model container [2023-11-29 05:23:45,425 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:23:45" (1/1) ... [2023-11-29 05:23:45,457 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:23:45,634 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:23:45,645 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:23:45,679 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:23:45,689 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 05:23:45,689 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 05:23:45,695 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:23:45,696 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:23:45 WrapperNode [2023-11-29 05:23:45,696 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:23:45,697 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:23:45,697 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:23:45,697 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:23:45,702 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:23:45" (1/1) ... [2023-11-29 05:23:45,712 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:23:45" (1/1) ... [2023-11-29 05:23:45,739 INFO L138 Inliner]: procedures = 25, calls = 121, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 273 [2023-11-29 05:23:45,740 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:23:45,740 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:23:45,740 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:23:45,741 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:23:45,753 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:23:45" (1/1) ... [2023-11-29 05:23:45,753 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:23:45" (1/1) ... [2023-11-29 05:23:45,758 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:23:45" (1/1) ... [2023-11-29 05:23:45,779 INFO L175 MemorySlicer]: Split 14 memory accesses to 7 slices as follows [2, 2, 2, 2, 2, 2, 2]. 14 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 1, 1, 1, 1, 1]. [2023-11-29 05:23:45,779 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:23:45" (1/1) ... [2023-11-29 05:23:45,779 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:23:45" (1/1) ... [2023-11-29 05:23:45,792 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:23:45" (1/1) ... [2023-11-29 05:23:45,797 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:23:45" (1/1) ... [2023-11-29 05:23:45,800 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:23:45" (1/1) ... [2023-11-29 05:23:45,802 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:23:45" (1/1) ... [2023-11-29 05:23:45,808 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:23:45,809 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:23:45,809 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:23:45,809 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:23:45,810 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:23:45" (1/1) ... [2023-11-29 05:23:45,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:23:45,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6030325-fe21-448f-a76e-a955d6cf7184/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:23:45,840 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6030325-fe21-448f-a76e-a955d6cf7184/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:23:45,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6030325-fe21-448f-a76e-a955d6cf7184/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:23:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:23:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:23:45,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:23:45,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:23:45,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 05:23:45,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 05:23:45,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 05:23:45,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-29 05:23:45,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-29 05:23:45,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:23:45,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:23:45,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 05:23:45,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 05:23:45,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 05:23:45,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-29 05:23:45,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-29 05:23:45,872 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 05:23:45,872 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 05:23:45,872 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 05:23:45,872 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 05:23:45,872 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 05:23:45,873 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 05:23:45,873 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-29 05:23:45,873 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-29 05:23:45,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:23:45,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:23:45,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 05:23:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 05:23:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 05:23:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 05:23:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-29 05:23:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-11-29 05:23:45,874 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-11-29 05:23:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-11-29 05:23:45,875 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-11-29 05:23:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 05:23:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 05:23:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:23:45,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:23:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:23:45,877 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 05:23:46,061 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:23:46,064 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:23:46,420 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:23:46,639 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:23:46,640 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 05:23:46,640 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:23:46 BoogieIcfgContainer [2023-11-29 05:23:46,640 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:23:46,643 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:23:46,644 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:23:46,647 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:23:46,647 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:23:45" (1/3) ... [2023-11-29 05:23:46,648 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4beaf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:23:46, skipping insertion in model container [2023-11-29 05:23:46,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:23:45" (2/3) ... [2023-11-29 05:23:46,648 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4beaf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:23:46, skipping insertion in model container [2023-11-29 05:23:46,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:23:46" (3/3) ... [2023-11-29 05:23:46,650 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-barrier-loop.wvr.c [2023-11-29 05:23:46,669 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:23:46,669 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-29 05:23:46,670 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 05:23:46,781 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-11-29 05:23:46,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 151 transitions, 368 flow [2023-11-29 05:23:46,875 INFO L124 PetriNetUnfolderBase]: 12/131 cut-off events. [2023-11-29 05:23:46,875 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-29 05:23:46,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 131 events. 12/131 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 432 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 133. Up to 3 conditions per place. [2023-11-29 05:23:46,881 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 151 transitions, 368 flow [2023-11-29 05:23:46,888 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 130 transitions, 308 flow [2023-11-29 05:23:46,897 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:23:46,904 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@26427ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:23:46,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-29 05:23:46,907 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:23:46,907 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 05:23:46,907 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 05:23:46,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:23:46,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 05:23:46,909 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:23:46,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:23:46,914 INFO L85 PathProgramCache]: Analyzing trace with hash 21554, now seen corresponding path program 1 times [2023-11-29 05:23:46,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:23:46,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417139320] [2023-11-29 05:23:46,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:23:46,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:23:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:23:47,199 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 05:23:47,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:23:47,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417139320] [2023-11-29 05:23:47,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417139320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:23:47,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:23:47,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:23:47,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743531963] [2023-11-29 05:23:47,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:23:47,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:23:47,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:23:47,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:23:47,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:23:47,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 155 [2023-11-29 05:23:47,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 130 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 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 05:23:47,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:23:47,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 155 [2023-11-29 05:23:47,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:24:04,663 INFO L124 PetriNetUnfolderBase]: 134107/208209 cut-off events. [2023-11-29 05:24:04,663 INFO L125 PetriNetUnfolderBase]: For 16982/17840 co-relation queries the response was YES. [2023-11-29 05:24:05,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386358 conditions, 208209 events. 134107/208209 cut-off events. For 16982/17840 co-relation queries the response was YES. Maximal size of possible extension queue 7178. Compared 1949662 event pairs, 98288 based on Foata normal form. 29182/169475 useless extension candidates. Maximal degree in co-relation 384498. Up to 158298 conditions per place. [2023-11-29 05:24:06,590 INFO L140 encePairwiseOnDemand]: 144/155 looper letters, 102 selfloop transitions, 4 changer transitions 0/174 dead transitions. [2023-11-29 05:24:06,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 174 transitions, 653 flow [2023-11-29 05:24:06,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:24:06,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:24:06,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2023-11-29 05:24:06,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.789247311827957 [2023-11-29 05:24:06,606 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2023-11-29 05:24:06,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2023-11-29 05:24:06,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:24:06,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2023-11-29 05:24:06,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 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 05:24:06,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 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 05:24:06,618 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 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 05:24:06,619 INFO L175 Difference]: Start difference. First operand has 137 places, 130 transitions, 308 flow. Second operand 3 states and 367 transitions. [2023-11-29 05:24:06,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 174 transitions, 653 flow [2023-11-29 05:24:08,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 174 transitions, 591 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-11-29 05:24:08,382 INFO L231 Difference]: Finished difference. Result has 126 places, 126 transitions, 292 flow [2023-11-29 05:24:08,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=292, PETRI_PLACES=126, PETRI_TRANSITIONS=126} [2023-11-29 05:24:08,386 INFO L281 CegarLoopForPetriNet]: 137 programPoint places, -11 predicate places. [2023-11-29 05:24:08,386 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 126 transitions, 292 flow [2023-11-29 05:24:08,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 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 05:24:08,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:24:08,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 05:24:08,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:24:08,387 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:24:08,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:24:08,388 INFO L85 PathProgramCache]: Analyzing trace with hash 21555, now seen corresponding path program 1 times [2023-11-29 05:24:08,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:24:08,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263824699] [2023-11-29 05:24:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:24:08,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:24:08,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:24:08,525 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 05:24:08,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:24:08,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263824699] [2023-11-29 05:24:08,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263824699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:24:08,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:24:08,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:24:08,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665390136] [2023-11-29 05:24:08,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:24:08,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:24:08,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:24:08,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:24:08,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:24:08,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 155 [2023-11-29 05:24:08,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 126 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 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 05:24:08,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:24:08,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 155 [2023-11-29 05:24:08,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:24:33,449 INFO L124 PetriNetUnfolderBase]: 221389/330507 cut-off events. [2023-11-29 05:24:33,449 INFO L125 PetriNetUnfolderBase]: For 16534/17948 co-relation queries the response was YES. [2023-11-29 05:24:34,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615752 conditions, 330507 events. 221389/330507 cut-off events. For 16534/17948 co-relation queries the response was YES. Maximal size of possible extension queue 11213. Compared 3071925 event pairs, 117443 based on Foata normal form. 142/225982 useless extension candidates. Maximal degree in co-relation 598169. Up to 208150 conditions per place. [2023-11-29 05:24:35,746 INFO L140 encePairwiseOnDemand]: 149/155 looper letters, 106 selfloop transitions, 5 changer transitions 0/178 dead transitions. [2023-11-29 05:24:35,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 178 transitions, 647 flow [2023-11-29 05:24:35,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:24:35,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:24:35,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2023-11-29 05:24:35,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7677419354838709 [2023-11-29 05:24:35,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 357 transitions. [2023-11-29 05:24:35,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 357 transitions. [2023-11-29 05:24:35,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:24:35,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 357 transitions. [2023-11-29 05:24:35,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 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 05:24:35,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 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 05:24:35,752 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 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 05:24:35,753 INFO L175 Difference]: Start difference. First operand has 126 places, 126 transitions, 292 flow. Second operand 3 states and 357 transitions. [2023-11-29 05:24:35,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 178 transitions, 647 flow [2023-11-29 05:24:37,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 178 transitions, 635 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:24:37,181 INFO L231 Difference]: Finished difference. Result has 127 places, 128 transitions, 318 flow [2023-11-29 05:24:37,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=127, PETRI_TRANSITIONS=128} [2023-11-29 05:24:37,182 INFO L281 CegarLoopForPetriNet]: 137 programPoint places, -10 predicate places. [2023-11-29 05:24:37,182 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 128 transitions, 318 flow [2023-11-29 05:24:37,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 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 05:24:37,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:24:37,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 05:24:37,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:24:37,183 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:24:37,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:24:37,184 INFO L85 PathProgramCache]: Analyzing trace with hash 642921082, now seen corresponding path program 1 times [2023-11-29 05:24:37,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:24:37,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473837141] [2023-11-29 05:24:37,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:24:37,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:24:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:24:37,234 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 05:24:37,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:24:37,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473837141] [2023-11-29 05:24:37,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473837141] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:24:37,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:24:37,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:24:37,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436865057] [2023-11-29 05:24:37,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:24:37,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:24:37,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:24:37,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:24:37,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:24:37,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 155 [2023-11-29 05:24:37,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 128 transitions, 318 flow. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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 05:24:37,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:24:37,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 155 [2023-11-29 05:24:37,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:24:55,817 INFO L124 PetriNetUnfolderBase]: 167075/268256 cut-off events. [2023-11-29 05:24:55,817 INFO L125 PetriNetUnfolderBase]: For 7711/9053 co-relation queries the response was YES. [2023-11-29 05:24:56,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481521 conditions, 268256 events. 167075/268256 cut-off events. For 7711/9053 co-relation queries the response was YES. Maximal size of possible extension queue 9753. Compared 2734571 event pairs, 116813 based on Foata normal form. 0/176459 useless extension candidates. Maximal degree in co-relation 346860. Up to 197906 conditions per place. [2023-11-29 05:24:57,663 INFO L140 encePairwiseOnDemand]: 148/155 looper letters, 109 selfloop transitions, 6 changer transitions 0/183 dead transitions. [2023-11-29 05:24:57,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 183 transitions, 691 flow [2023-11-29 05:24:57,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:24:57,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:24:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-11-29 05:24:57,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7720430107526882 [2023-11-29 05:24:57,665 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-11-29 05:24:57,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-11-29 05:24:57,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:24:57,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-11-29 05:24:57,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 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 05:24:57,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 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 05:24:57,669 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 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 05:24:57,670 INFO L175 Difference]: Start difference. First operand has 127 places, 128 transitions, 318 flow. Second operand 3 states and 359 transitions. [2023-11-29 05:24:57,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 183 transitions, 691 flow [2023-11-29 05:24:57,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 183 transitions, 677 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:24:57,680 INFO L231 Difference]: Finished difference. Result has 129 places, 133 transitions, 362 flow [2023-11-29 05:24:57,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=362, PETRI_PLACES=129, PETRI_TRANSITIONS=133} [2023-11-29 05:24:57,681 INFO L281 CegarLoopForPetriNet]: 137 programPoint places, -8 predicate places. [2023-11-29 05:24:57,681 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 133 transitions, 362 flow [2023-11-29 05:24:57,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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 05:24:57,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:24:57,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 05:24:57,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 05:24:57,682 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:24:57,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:24:57,682 INFO L85 PathProgramCache]: Analyzing trace with hash 642921083, now seen corresponding path program 1 times [2023-11-29 05:24:57,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:24:57,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464086243] [2023-11-29 05:24:57,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:24:57,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:24:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:24:57,748 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 05:24:57,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:24:57,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464086243] [2023-11-29 05:24:57,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464086243] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:24:57,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:24:57,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:24:57,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537774030] [2023-11-29 05:24:57,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:24:57,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:24:57,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:24:57,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:24:57,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:24:57,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 155 [2023-11-29 05:24:57,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 133 transitions, 362 flow. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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 05:24:57,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:24:57,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 155 [2023-11-29 05:24:57,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:25:16,115 INFO L124 PetriNetUnfolderBase]: 164783/264945 cut-off events. [2023-11-29 05:25:16,115 INFO L125 PetriNetUnfolderBase]: For 10276/11615 co-relation queries the response was YES. [2023-11-29 05:25:16,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477674 conditions, 264945 events. 164783/264945 cut-off events. For 10276/11615 co-relation queries the response was YES. Maximal size of possible extension queue 9716. Compared 2703717 event pairs, 118504 based on Foata normal form. 654/175030 useless extension candidates. Maximal degree in co-relation 456012. Up to 201621 conditions per place. [2023-11-29 05:25:18,066 INFO L140 encePairwiseOnDemand]: 152/155 looper letters, 58 selfloop transitions, 1 changer transitions 0/131 dead transitions. [2023-11-29 05:25:18,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 131 transitions, 476 flow [2023-11-29 05:25:18,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:25:18,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:25:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 309 transitions. [2023-11-29 05:25:18,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6645161290322581 [2023-11-29 05:25:18,068 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 309 transitions. [2023-11-29 05:25:18,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 309 transitions. [2023-11-29 05:25:18,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:25:18,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 309 transitions. [2023-11-29 05:25:18,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 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 05:25:18,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 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 05:25:18,071 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 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 05:25:18,071 INFO L175 Difference]: Start difference. First operand has 129 places, 133 transitions, 362 flow. Second operand 3 states and 309 transitions. [2023-11-29 05:25:18,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 131 transitions, 476 flow [2023-11-29 05:25:18,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 131 transitions, 464 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:25:18,092 INFO L231 Difference]: Finished difference. Result has 127 places, 131 transitions, 348 flow [2023-11-29 05:25:18,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=348, PETRI_PLACES=127, PETRI_TRANSITIONS=131} [2023-11-29 05:25:18,093 INFO L281 CegarLoopForPetriNet]: 137 programPoint places, -10 predicate places. [2023-11-29 05:25:18,093 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 131 transitions, 348 flow [2023-11-29 05:25:18,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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 05:25:18,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:25:18,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:25:18,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 05:25:18,094 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:25:18,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:18,094 INFO L85 PathProgramCache]: Analyzing trace with hash -625241342, now seen corresponding path program 1 times [2023-11-29 05:25:18,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:25:18,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19424342] [2023-11-29 05:25:18,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:18,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:25:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:18,152 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 05:25:18,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:25:18,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19424342] [2023-11-29 05:25:18,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19424342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:25:18,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:25:18,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:25:18,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448875891] [2023-11-29 05:25:18,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:25:18,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:25:18,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:25:18,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:25:18,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:25:18,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 155 [2023-11-29 05:25:18,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 131 transitions, 348 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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 05:25:18,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:25:18,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 155 [2023-11-29 05:25:18,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand