./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:41:15,745 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:41:15,852 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:41:15,858 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:41:15,858 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:41:15,905 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:41:15,906 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:41:15,906 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:41:15,907 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:41:15,912 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:41:15,913 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:41:15,914 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:41:15,914 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:41:15,916 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:41:15,916 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:41:15,917 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:41:15,917 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:41:15,918 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:41:15,918 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:41:15,920 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:41:15,920 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:41:15,921 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:41:15,921 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:41:15,921 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:41:15,922 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:41:15,922 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:41:15,922 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:41:15,923 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:41:15,924 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:41:15,924 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:41:15,925 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:41:15,925 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:41:15,926 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:41:15,926 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:41:15,926 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:41:15,926 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:41:15,926 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:41:15,927 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:41:15,927 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:41:15,928 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:41:15,928 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:41:15,928 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:41:15,928 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_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af [2023-11-26 10:41:16,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:41:16,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:41:16,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:41:16,289 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:41:16,289 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:41:16,291 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2023-11-26 10:41:19,453 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:41:19,786 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:41:19,787 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2023-11-26 10:41:19,822 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/data/ed107272e/f7bc4214e6d94755855f688abff01ed3/FLAGa13c19668 [2023-11-26 10:41:19,840 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/data/ed107272e/f7bc4214e6d94755855f688abff01ed3 [2023-11-26 10:41:19,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:41:19,848 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:41:19,852 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:41:19,853 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:41:19,858 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:41:19,859 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:41:19" (1/1) ... [2023-11-26 10:41:19,860 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fb056a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:19, skipping insertion in model container [2023-11-26 10:41:19,861 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:41:19" (1/1) ... [2023-11-26 10:41:19,948 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:41:20,560 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_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i[47038,47051] [2023-11-26 10:41:20,580 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-26 10:41:20,581 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-26 10:41:20,581 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-26 10:41:20,583 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-26 10:41:20,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:41:20,683 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:41:20,745 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_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i[47038,47051] [2023-11-26 10:41:20,749 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-26 10:41:20,749 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-26 10:41:20,750 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-26 10:41:20,751 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-26 10:41:20,788 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:41:20,903 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:41:20,904 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:20 WrapperNode [2023-11-26 10:41:20,904 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:41:20,905 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:41:20,905 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:41:20,906 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:41:20,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:20" (1/1) ... [2023-11-26 10:41:20,934 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:20" (1/1) ... [2023-11-26 10:41:20,975 INFO L138 Inliner]: procedures = 279, calls = 72, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 333 [2023-11-26 10:41:20,976 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:41:20,976 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:41:20,976 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:41:20,977 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:41:20,988 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:20" (1/1) ... [2023-11-26 10:41:20,989 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:20" (1/1) ... [2023-11-26 10:41:20,994 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:20" (1/1) ... [2023-11-26 10:41:21,019 INFO L175 MemorySlicer]: Split 37 memory accesses to 5 slices as follows [2, 2, 5, 26, 2]. 70 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0, 0]. The 17 writes are split as follows [0, 1, 0, 15, 1]. [2023-11-26 10:41:21,020 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:20" (1/1) ... [2023-11-26 10:41:21,020 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:20" (1/1) ... [2023-11-26 10:41:21,049 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:20" (1/1) ... [2023-11-26 10:41:21,062 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:20" (1/1) ... [2023-11-26 10:41:21,075 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:20" (1/1) ... [2023-11-26 10:41:21,078 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:20" (1/1) ... [2023-11-26 10:41:21,084 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:41:21,089 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:41:21,089 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:41:21,090 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:41:21,091 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:20" (1/1) ... [2023-11-26 10:41:21,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:41:21,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:21,131 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:41:21,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:41:21,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:41:21,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 10:41:21,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-26 10:41:21,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-26 10:41:21,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-26 10:41:21,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-26 10:41:21,175 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-11-26 10:41:21,175 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-11-26 10:41:21,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:41:21,175 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-26 10:41:21,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:41:21,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:41:21,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:41:21,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 10:41:21,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 10:41:21,178 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-11-26 10:41:21,178 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-11-26 10:41:21,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:41:21,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:41:21,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:41:21,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 10:41:21,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 10:41:21,182 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-26 10:41:21,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 10:41:21,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:41:21,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 10:41:21,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-26 10:41:21,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-26 10:41:21,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-26 10:41:21,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-26 10:41:21,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:41:21,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:41:21,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:41:21,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:41:21,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 10:41:21,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:41:21,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:41:21,193 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 10:41:21,401 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:41:21,405 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:41:21,996 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:41:22,436 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:41:22,436 INFO L309 CfgBuilder]: Removed 30 assume(true) statements. [2023-11-26 10:41:22,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:41:22 BoogieIcfgContainer [2023-11-26 10:41:22,438 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:41:22,441 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:41:22,441 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:41:22,445 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:41:22,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:41:19" (1/3) ... [2023-11-26 10:41:22,446 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a142e71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:41:22, skipping insertion in model container [2023-11-26 10:41:22,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:20" (2/3) ... [2023-11-26 10:41:22,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a142e71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:41:22, skipping insertion in model container [2023-11-26 10:41:22,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:41:22" (3/3) ... [2023-11-26 10:41:22,452 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_90-arrayloop2_racing.i [2023-11-26 10:41:22,462 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 10:41:22,474 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:41:22,474 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-26 10:41:22,474 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:41:22,567 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-26 10:41:22,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 117 transitions, 254 flow [2023-11-26 10:41:22,729 INFO L124 PetriNetUnfolderBase]: 52/194 cut-off events. [2023-11-26 10:41:22,729 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-26 10:41:22,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 194 events. 52/194 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 811 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 118. Up to 8 conditions per place. [2023-11-26 10:41:22,737 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 117 transitions, 254 flow [2023-11-26 10:41:22,750 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 117 transitions, 254 flow [2023-11-26 10:41:22,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:41:22,775 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;@1cfb52e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:41:22,776 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-26 10:41:22,785 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:41:22,785 INFO L124 PetriNetUnfolderBase]: 2/24 cut-off events. [2023-11-26 10:41:22,785 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:41:22,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:22,786 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-26 10:41:22,787 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-26 10:41:22,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:22,797 INFO L85 PathProgramCache]: Analyzing trace with hash -22250490, now seen corresponding path program 1 times [2023-11-26 10:41:22,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:22,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868959578] [2023-11-26 10:41:22,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:22,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:41:23,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:23,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868959578] [2023-11-26 10:41:23,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868959578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:23,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:23,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:41:23,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662088895] [2023-11-26 10:41:23,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:23,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:41:23,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:23,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:41:23,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:41:23,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 117 [2023-11-26 10:41:23,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 117 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:23,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:23,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 117 [2023-11-26 10:41:23,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:25,642 INFO L124 PetriNetUnfolderBase]: 7193/14004 cut-off events. [2023-11-26 10:41:25,642 INFO L125 PetriNetUnfolderBase]: For 239/239 co-relation queries the response was YES. [2023-11-26 10:41:25,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24698 conditions, 14004 events. 7193/14004 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 112136 event pairs, 6080 based on Foata normal form. 2354/14305 useless extension candidates. Maximal degree in co-relation 23602. Up to 10560 conditions per place. [2023-11-26 10:41:25,761 INFO L140 encePairwiseOnDemand]: 92/117 looper letters, 66 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-11-26 10:41:25,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 98 transitions, 352 flow [2023-11-26 10:41:25,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:41:25,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:41:25,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 181 transitions. [2023-11-26 10:41:25,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5156695156695157 [2023-11-26 10:41:25,778 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 181 transitions. [2023-11-26 10:41:25,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 181 transitions. [2023-11-26 10:41:25,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:25,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 181 transitions. [2023-11-26 10:41:25,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:25,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:25,796 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:25,798 INFO L175 Difference]: Start difference. First operand has 88 places, 117 transitions, 254 flow. Second operand 3 states and 181 transitions. [2023-11-26 10:41:25,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 98 transitions, 352 flow [2023-11-26 10:41:25,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 98 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 10:41:25,811 INFO L231 Difference]: Finished difference. Result has 91 places, 96 transitions, 222 flow [2023-11-26 10:41:25,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=91, PETRI_TRANSITIONS=96} [2023-11-26 10:41:25,817 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2023-11-26 10:41:25,818 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 96 transitions, 222 flow [2023-11-26 10:41:25,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:25,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:25,819 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:25,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:41:25,822 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-26 10:41:25,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:25,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1961604380, now seen corresponding path program 1 times [2023-11-26 10:41:25,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:25,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257203348] [2023-11-26 10:41:25,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:25,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:41:26,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:26,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257203348] [2023-11-26 10:41:26,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257203348] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:26,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:26,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:41:26,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694713192] [2023-11-26 10:41:26,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:26,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:41:26,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:26,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:41:26,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:41:26,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 117 [2023-11-26 10:41:26,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 96 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:26,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:26,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 117 [2023-11-26 10:41:26,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:28,053 INFO L124 PetriNetUnfolderBase]: 7193/14006 cut-off events. [2023-11-26 10:41:28,053 INFO L125 PetriNetUnfolderBase]: For 239/239 co-relation queries the response was YES. [2023-11-26 10:41:28,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24709 conditions, 14006 events. 7193/14006 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 112163 event pairs, 6080 based on Foata normal form. 2/11958 useless extension candidates. Maximal degree in co-relation 24690. Up to 10563 conditions per place. [2023-11-26 10:41:28,150 INFO L140 encePairwiseOnDemand]: 114/117 looper letters, 65 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2023-11-26 10:41:28,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 97 transitions, 358 flow [2023-11-26 10:41:28,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:41:28,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:41:28,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2023-11-26 10:41:28,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4472934472934473 [2023-11-26 10:41:28,153 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 157 transitions. [2023-11-26 10:41:28,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 157 transitions. [2023-11-26 10:41:28,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:28,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 157 transitions. [2023-11-26 10:41:28,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:28,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:28,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:28,158 INFO L175 Difference]: Start difference. First operand has 91 places, 96 transitions, 222 flow. Second operand 3 states and 157 transitions. [2023-11-26 10:41:28,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 97 transitions, 358 flow [2023-11-26 10:41:28,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 97 transitions, 356 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:41:28,163 INFO L231 Difference]: Finished difference. Result has 93 places, 97 transitions, 234 flow [2023-11-26 10:41:28,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=93, PETRI_TRANSITIONS=97} [2023-11-26 10:41:28,165 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 5 predicate places. [2023-11-26 10:41:28,165 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 97 transitions, 234 flow [2023-11-26 10:41:28,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:28,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:28,166 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:28,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:41:28,167 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-26 10:41:28,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:28,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1133511027, now seen corresponding path program 1 times [2023-11-26 10:41:28,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:28,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046136264] [2023-11-26 10:41:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:28,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:28,215 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:41:28,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085305398] [2023-11-26 10:41:28,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:28,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:28,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:28,220 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:28,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:41:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:28,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:41:28,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:28,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:41:28,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:28,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:41:28,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:28,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046136264] [2023-11-26 10:41:28,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:41:28,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085305398] [2023-11-26 10:41:28,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085305398] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:41:28,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:41:28,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-26 10:41:28,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548015337] [2023-11-26 10:41:28,553 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:28,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:41:28,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:28,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:41:28,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:41:28,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 117 [2023-11-26 10:41:28,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 97 transitions, 234 flow. Second operand has 6 states, 6 states have (on average 31.833333333333332) internal successors, (191), 6 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:28,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:28,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 117 [2023-11-26 10:41:28,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:31,105 INFO L124 PetriNetUnfolderBase]: 7193/14012 cut-off events. [2023-11-26 10:41:31,106 INFO L125 PetriNetUnfolderBase]: For 240/240 co-relation queries the response was YES. [2023-11-26 10:41:31,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24737 conditions, 14012 events. 7193/14012 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 112225 event pairs, 6080 based on Foata normal form. 6/11968 useless extension candidates. Maximal degree in co-relation 24697. Up to 10563 conditions per place. [2023-11-26 10:41:31,181 INFO L140 encePairwiseOnDemand]: 114/117 looper letters, 65 selfloop transitions, 5 changer transitions 0/100 dead transitions. [2023-11-26 10:41:31,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 100 transitions, 386 flow [2023-11-26 10:41:31,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:41:31,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:41:31,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 252 transitions. [2023-11-26 10:41:31,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358974358974359 [2023-11-26 10:41:31,188 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 252 transitions. [2023-11-26 10:41:31,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 252 transitions. [2023-11-26 10:41:31,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:31,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 252 transitions. [2023-11-26 10:41:31,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:31,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 117.0) internal successors, (819), 7 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:31,195 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 117.0) internal successors, (819), 7 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:31,196 INFO L175 Difference]: Start difference. First operand has 93 places, 97 transitions, 234 flow. Second operand 6 states and 252 transitions. [2023-11-26 10:41:31,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 100 transitions, 386 flow [2023-11-26 10:41:31,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 100 transitions, 382 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 10:41:31,205 INFO L231 Difference]: Finished difference. Result has 100 places, 100 transitions, 272 flow [2023-11-26 10:41:31,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=272, PETRI_PLACES=100, PETRI_TRANSITIONS=100} [2023-11-26 10:41:31,207 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 12 predicate places. [2023-11-26 10:41:31,207 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 100 transitions, 272 flow [2023-11-26 10:41:31,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.833333333333332) internal successors, (191), 6 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:31,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:31,208 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:31,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:31,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:31,414 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-26 10:41:31,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:31,502 INFO L85 PathProgramCache]: Analyzing trace with hash 566727388, now seen corresponding path program 2 times [2023-11-26 10:41:31,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:31,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47393833] [2023-11-26 10:41:31,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:31,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:31,596 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:41:31,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154773504] [2023-11-26 10:41:31,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:41:31,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:31,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:31,598 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:31,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:41:31,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:41:31,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:41:31,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:41:31,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:41:31,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:41:32,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:32,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47393833] [2023-11-26 10:41:32,050 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:41:32,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154773504] [2023-11-26 10:41:32,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154773504] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:41:32,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:41:32,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-26 10:41:32,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797025005] [2023-11-26 10:41:32,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:32,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 10:41:32,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:32,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 10:41:32,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:41:32,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 117 [2023-11-26 10:41:32,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 100 transitions, 272 flow. Second operand has 12 states, 12 states have (on average 31.416666666666668) internal successors, (377), 12 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:32,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:32,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 117 [2023-11-26 10:41:32,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:34,610 INFO L124 PetriNetUnfolderBase]: 7193/14024 cut-off events. [2023-11-26 10:41:34,610 INFO L125 PetriNetUnfolderBase]: For 320/320 co-relation queries the response was YES. [2023-11-26 10:41:34,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24808 conditions, 14024 events. 7193/14024 cut-off events. For 320/320 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 112305 event pairs, 6080 based on Foata normal form. 12/11986 useless extension candidates. Maximal degree in co-relation 24693. Up to 10563 conditions per place. [2023-11-26 10:41:34,724 INFO L140 encePairwiseOnDemand]: 114/117 looper letters, 65 selfloop transitions, 11 changer transitions 0/106 dead transitions. [2023-11-26 10:41:34,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 106 transitions, 460 flow [2023-11-26 10:41:34,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:41:34,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 10:41:34,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 441 transitions. [2023-11-26 10:41:34,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3141025641025641 [2023-11-26 10:41:34,728 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 441 transitions. [2023-11-26 10:41:34,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 441 transitions. [2023-11-26 10:41:34,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:34,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 441 transitions. [2023-11-26 10:41:34,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 36.75) internal successors, (441), 12 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:34,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 117.0) internal successors, (1521), 13 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:34,834 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 117.0) internal successors, (1521), 13 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:34,834 INFO L175 Difference]: Start difference. First operand has 100 places, 100 transitions, 272 flow. Second operand 12 states and 441 transitions. [2023-11-26 10:41:34,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 106 transitions, 460 flow [2023-11-26 10:41:34,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 106 transitions, 446 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-26 10:41:34,840 INFO L231 Difference]: Finished difference. Result has 116 places, 106 transitions, 354 flow [2023-11-26 10:41:34,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=354, PETRI_PLACES=116, PETRI_TRANSITIONS=106} [2023-11-26 10:41:34,841 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 28 predicate places. [2023-11-26 10:41:34,841 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 106 transitions, 354 flow [2023-11-26 10:41:34,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 31.416666666666668) internal successors, (377), 12 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:34,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:34,842 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:34,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:35,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:35,043 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-26 10:41:35,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:35,043 INFO L85 PathProgramCache]: Analyzing trace with hash -113296516, now seen corresponding path program 3 times [2023-11-26 10:41:35,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:35,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289981315] [2023-11-26 10:41:35,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:35,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:35,244 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:41:35,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [838445311] [2023-11-26 10:41:35,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:41:35,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:35,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:35,251 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:35,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:41:35,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 10:41:35,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:41:35,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:41:35,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-26 10:41:35,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:35,787 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-26 10:41:35,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:35,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289981315] [2023-11-26 10:41:35,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:41:35,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838445311] [2023-11-26 10:41:35,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838445311] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:41:35,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:41:35,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-26 10:41:35,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139283934] [2023-11-26 10:41:35,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:35,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:41:35,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:35,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:41:35,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:41:35,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 117 [2023-11-26 10:41:35,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 106 transitions, 354 flow. Second operand has 6 states, 6 states have (on average 32.166666666666664) internal successors, (193), 6 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:35,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:35,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 117 [2023-11-26 10:41:35,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:38,426 INFO L124 PetriNetUnfolderBase]: 7195/14088 cut-off events. [2023-11-26 10:41:38,426 INFO L125 PetriNetUnfolderBase]: For 398/398 co-relation queries the response was YES. [2023-11-26 10:41:38,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25022 conditions, 14088 events. 7195/14088 cut-off events. For 398/398 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 112870 event pairs, 6080 based on Foata normal form. 3/12020 useless extension candidates. Maximal degree in co-relation 24715. Up to 10541 conditions per place. [2023-11-26 10:41:38,524 INFO L140 encePairwiseOnDemand]: 113/117 looper letters, 109 selfloop transitions, 6 changer transitions 0/145 dead transitions. [2023-11-26 10:41:38,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 145 transitions, 933 flow [2023-11-26 10:41:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:41:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:41:38,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 258 transitions. [2023-11-26 10:41:38,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36752136752136755 [2023-11-26 10:41:38,527 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 258 transitions. [2023-11-26 10:41:38,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 258 transitions. [2023-11-26 10:41:38,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:38,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 258 transitions. [2023-11-26 10:41:38,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 43.0) internal successors, (258), 6 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:38,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 117.0) internal successors, (819), 7 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:38,531 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 117.0) internal successors, (819), 7 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:38,531 INFO L175 Difference]: Start difference. First operand has 116 places, 106 transitions, 354 flow. Second operand 6 states and 258 transitions. [2023-11-26 10:41:38,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 145 transitions, 933 flow [2023-11-26 10:41:38,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 145 transitions, 739 flow, removed 76 selfloop flow, removed 5 redundant places. [2023-11-26 10:41:38,636 INFO L231 Difference]: Finished difference. Result has 120 places, 109 transitions, 389 flow [2023-11-26 10:41:38,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=389, PETRI_PLACES=120, PETRI_TRANSITIONS=109} [2023-11-26 10:41:38,638 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 32 predicate places. [2023-11-26 10:41:38,638 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 109 transitions, 389 flow [2023-11-26 10:41:38,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.166666666666664) internal successors, (193), 6 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:38,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:38,638 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 4, 4, 2, 1, 1, 1, 1, 1] [2023-11-26 10:41:38,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-26 10:41:38,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:38,839 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-26 10:41:38,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:38,839 INFO L85 PathProgramCache]: Analyzing trace with hash 387216350, now seen corresponding path program 4 times [2023-11-26 10:41:38,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:38,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876128175] [2023-11-26 10:41:38,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:38,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:39,644 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:41:39,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986224920] [2023-11-26 10:41:39,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:41:39,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:39,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:39,647 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:39,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:41:41,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:41:41,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:41:41,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 3629 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 10:41:41,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2023-11-26 10:41:41,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2023-11-26 10:41:42,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:42,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876128175] [2023-11-26 10:41:42,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:41:42,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986224920] [2023-11-26 10:41:42,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986224920] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:41:42,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:41:42,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-11-26 10:41:42,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97489425] [2023-11-26 10:41:42,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:42,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 10:41:42,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:42,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 10:41:42,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-11-26 10:41:42,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 117 [2023-11-26 10:41:42,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 109 transitions, 389 flow. Second operand has 24 states, 24 states have (on average 31.333333333333332) internal successors, (752), 24 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:42,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:42,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 117 [2023-11-26 10:41:42,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:46,020 INFO L124 PetriNetUnfolderBase]: 7195/14136 cut-off events. [2023-11-26 10:41:46,020 INFO L125 PetriNetUnfolderBase]: For 3724/3724 co-relation queries the response was YES. [2023-11-26 10:41:46,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25138 conditions, 14136 events. 7195/14136 cut-off events. For 3724/3724 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 112852 event pairs, 6080 based on Foata normal form. 48/12113 useless extension candidates. Maximal degree in co-relation 24720. Up to 10553 conditions per place. [2023-11-26 10:41:46,125 INFO L140 encePairwiseOnDemand]: 114/117 looper letters, 67 selfloop transitions, 24 changer transitions 0/121 dead transitions. [2023-11-26 10:41:46,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 121 transitions, 643 flow [2023-11-26 10:41:46,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 10:41:46,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-26 10:41:46,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 819 transitions. [2023-11-26 10:41:46,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2916666666666667 [2023-11-26 10:41:46,133 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 819 transitions. [2023-11-26 10:41:46,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 819 transitions. [2023-11-26 10:41:46,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:46,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 819 transitions. [2023-11-26 10:41:46,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 34.125) internal successors, (819), 24 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:46,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 117.0) internal successors, (2925), 25 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:46,150 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 117.0) internal successors, (2925), 25 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:46,150 INFO L175 Difference]: Start difference. First operand has 120 places, 109 transitions, 389 flow. Second operand 24 states and 819 transitions. [2023-11-26 10:41:46,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 121 transitions, 643 flow [2023-11-26 10:41:46,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 121 transitions, 635 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-26 10:41:46,160 INFO L231 Difference]: Finished difference. Result has 154 places, 121 transitions, 623 flow [2023-11-26 10:41:46,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=623, PETRI_PLACES=154, PETRI_TRANSITIONS=121} [2023-11-26 10:41:46,164 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 66 predicate places. [2023-11-26 10:41:46,164 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 121 transitions, 623 flow [2023-11-26 10:41:46,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 31.333333333333332) internal successors, (752), 24 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:46,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:46,169 INFO L208 CegarLoopForPetriNet]: trace histogram [88, 4, 4, 2, 1, 1, 1, 1, 1] [2023-11-26 10:41:46,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:46,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:46,385 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-26 10:41:46,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:46,386 INFO L85 PathProgramCache]: Analyzing trace with hash 943821534, now seen corresponding path program 5 times [2023-11-26 10:41:46,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:46,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272492073] [2023-11-26 10:41:46,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:46,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:47,990 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:41:47,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238173561] [2023-11-26 10:41:47,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 10:41:47,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:47,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:47,992 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:48,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52199f5c-a1b3-4a0c-84ff-0bc31c0ab6f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process