./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/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_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/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_46e2696f-6216-40ad-8558-91aa367931fe/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 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:44:40,156 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:44:40,234 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:44:40,239 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:44:40,240 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:44:40,266 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:44:40,266 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:44:40,267 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:44:40,268 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:44:40,269 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:44:40,269 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:44:40,270 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:44:40,271 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:44:40,271 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:44:40,272 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:44:40,272 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:44:40,273 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:44:40,274 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:44:40,274 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:44:40,275 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:44:40,275 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:44:40,276 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:44:40,277 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:44:40,277 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:44:40,278 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:44:40,279 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:44:40,279 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:44:40,280 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:44:40,280 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:44:40,281 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:44:40,281 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:44:40,282 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:44:40,282 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:44:40,283 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:44:40,283 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:44:40,284 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:44:40,284 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:44:40,285 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:44:40,285 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:44:40,285 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:44:40,286 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:44:40,286 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:44:40,286 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_46e2696f-6216-40ad-8558-91aa367931fe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 [2023-11-26 10:44:40,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:44:40,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:44:40,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:44:40,543 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:44:40,544 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:44:40,545 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2023-11-26 10:44:43,591 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:44:43,811 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:44:43,812 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2023-11-26 10:44:43,821 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/data/662049044/d5c5ac485e694390862097c36bdc350d/FLAG0ddf93278 [2023-11-26 10:44:43,837 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/data/662049044/d5c5ac485e694390862097c36bdc350d [2023-11-26 10:44:43,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:44:43,842 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:44:43,844 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:44:43,844 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:44:43,850 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:44:43,851 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:44:43" (1/1) ... [2023-11-26 10:44:43,852 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6556db9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:43, skipping insertion in model container [2023-11-26 10:44:43,852 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:44:43" (1/1) ... [2023-11-26 10:44:43,895 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:44:44,103 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_46e2696f-6216-40ad-8558-91aa367931fe/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4827,4840] [2023-11-26 10:44:44,117 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:44:44,128 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:44:44,174 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_46e2696f-6216-40ad-8558-91aa367931fe/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4827,4840] [2023-11-26 10:44:44,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:44:44,228 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:44:44,229 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:44 WrapperNode [2023-11-26 10:44:44,229 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:44:44,231 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:44:44,231 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:44:44,232 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:44:44,240 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:44" (1/1) ... [2023-11-26 10:44:44,268 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:44" (1/1) ... [2023-11-26 10:44:44,333 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 319 [2023-11-26 10:44:44,335 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:44:44,336 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:44:44,337 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:44:44,337 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:44:44,350 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:44" (1/1) ... [2023-11-26 10:44:44,351 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:44" (1/1) ... [2023-11-26 10:44:44,368 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:44" (1/1) ... [2023-11-26 10:44:44,402 INFO L175 MemorySlicer]: Split 12 memory accesses to 5 slices as follows [2, 2, 2, 2, 4]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-26 10:44:44,403 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:44" (1/1) ... [2023-11-26 10:44:44,403 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:44" (1/1) ... [2023-11-26 10:44:44,423 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:44" (1/1) ... [2023-11-26 10:44:44,447 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:44" (1/1) ... [2023-11-26 10:44:44,450 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:44" (1/1) ... [2023-11-26 10:44:44,452 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:44" (1/1) ... [2023-11-26 10:44:44,462 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:44:44,463 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:44:44,468 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:44:44,468 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:44:44,469 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:44" (1/1) ... [2023-11-26 10:44:44,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:44:44,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:44,508 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:44:44,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:44:44,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:44:44,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:44:44,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:44:44,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:44:44,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:44:44,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 10:44:44,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 10:44:44,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:44:44,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:44:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:44:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 10:44:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 10:44:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 10:44:44,568 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 10:44:44,568 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 10:44:44,568 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 10:44:44,568 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-26 10:44:44,569 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-26 10:44:44,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:44:44,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:44:44,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:44:44,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:44:44,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 10:44:44,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 10:44:44,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:44:44,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:44:44,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:44:44,574 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 10:44:44,782 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:44:44,785 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:44:45,337 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:44:46,025 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:44:46,025 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-26 10:44:46,026 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:44:46 BoogieIcfgContainer [2023-11-26 10:44:46,026 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:44:46,031 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:44:46,031 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:44:46,035 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:44:46,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:44:43" (1/3) ... [2023-11-26 10:44:46,036 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27a35a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:44:46, skipping insertion in model container [2023-11-26 10:44:46,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:44" (2/3) ... [2023-11-26 10:44:46,038 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27a35a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:44:46, skipping insertion in model container [2023-11-26 10:44:46,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:44:46" (3/3) ... [2023-11-26 10:44:46,040 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2023-11-26 10:44:46,058 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 10:44:46,069 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:44:46,070 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:44:46,070 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:44:46,189 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-26 10:44:46,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 38 transitions, 97 flow [2023-11-26 10:44:46,268 INFO L124 PetriNetUnfolderBase]: 7/35 cut-off events. [2023-11-26 10:44:46,268 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 10:44:46,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 35 events. 7/35 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 30 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2023-11-26 10:44:46,272 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 38 transitions, 97 flow [2023-11-26 10:44:46,276 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 34 transitions, 86 flow [2023-11-26 10:44:46,287 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:44:46,294 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;@2b5159cf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:44:46,295 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-26 10:44:46,316 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:44:46,316 INFO L124 PetriNetUnfolderBase]: 7/33 cut-off events. [2023-11-26 10:44:46,316 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 10:44:46,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:46,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:46,318 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:44:46,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:46,324 INFO L85 PathProgramCache]: Analyzing trace with hash 566723653, now seen corresponding path program 1 times [2023-11-26 10:44:46,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:46,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084116761] [2023-11-26 10:44:46,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:46,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:46,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:46,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084116761] [2023-11-26 10:44:46,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084116761] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:46,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:46,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:44:46,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187077196] [2023-11-26 10:44:46,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:46,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:44:46,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:46,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:44:46,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:44:46,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2023-11-26 10:44:46,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 86 flow. Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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 10:44:46,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:46,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2023-11-26 10:44:46,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:47,077 INFO L124 PetriNetUnfolderBase]: 466/696 cut-off events. [2023-11-26 10:44:47,077 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-11-26 10:44:47,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1442 conditions, 696 events. 466/696 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2428 event pairs, 333 based on Foata normal form. 132/675 useless extension candidates. Maximal degree in co-relation 1177. Up to 679 conditions per place. [2023-11-26 10:44:47,087 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 27 selfloop transitions, 0 changer transitions 0/31 dead transitions. [2023-11-26 10:44:47,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 31 transitions, 134 flow [2023-11-26 10:44:47,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:44:47,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-26 10:44:47,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 44 transitions. [2023-11-26 10:44:47,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2023-11-26 10:44:47,103 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 44 transitions. [2023-11-26 10:44:47,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 44 transitions. [2023-11-26 10:44:47,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:47,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 44 transitions. [2023-11-26 10:44:47,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 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 10:44:47,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 10:44:47,116 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 10:44:47,118 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 86 flow. Second operand 2 states and 44 transitions. [2023-11-26 10:44:47,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 31 transitions, 134 flow [2023-11-26 10:44:47,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 31 transitions, 122 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-26 10:44:47,128 INFO L231 Difference]: Finished difference. Result has 32 places, 31 transitions, 68 flow [2023-11-26 10:44:47,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=68, PETRI_PLACES=32, PETRI_TRANSITIONS=31} [2023-11-26 10:44:47,135 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -5 predicate places. [2023-11-26 10:44:47,135 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 31 transitions, 68 flow [2023-11-26 10:44:47,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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 10:44:47,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:47,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:47,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:44:47,137 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:44:47,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:47,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1846188191, now seen corresponding path program 1 times [2023-11-26 10:44:47,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:47,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64305939] [2023-11-26 10:44:47,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:47,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:47,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:47,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64305939] [2023-11-26 10:44:47,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64305939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:47,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:47,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:44:47,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585700693] [2023-11-26 10:44:47,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:47,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:47,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:47,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:47,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:47,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2023-11-26 10:44:47,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 10:44:47,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:47,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2023-11-26 10:44:47,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:47,792 INFO L124 PetriNetUnfolderBase]: 466/697 cut-off events. [2023-11-26 10:44:47,793 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-26 10:44:47,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1400 conditions, 697 events. 466/697 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2434 event pairs, 333 based on Foata normal form. 0/544 useless extension candidates. Maximal degree in co-relation 1397. Up to 679 conditions per place. [2023-11-26 10:44:47,803 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 26 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-11-26 10:44:47,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 126 flow [2023-11-26 10:44:47,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:44:47,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:44:47,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2023-11-26 10:44:47,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43859649122807015 [2023-11-26 10:44:47,810 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 50 transitions. [2023-11-26 10:44:47,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 50 transitions. [2023-11-26 10:44:47,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:47,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 50 transitions. [2023-11-26 10:44:47,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 10:44:47,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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 10:44:47,815 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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 10:44:47,815 INFO L175 Difference]: Start difference. First operand has 32 places, 31 transitions, 68 flow. Second operand 3 states and 50 transitions. [2023-11-26 10:44:47,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 126 flow [2023-11-26 10:44:47,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 126 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 10:44:47,825 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 80 flow [2023-11-26 10:44:47,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-11-26 10:44:47,826 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -2 predicate places. [2023-11-26 10:44:47,827 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 80 flow [2023-11-26 10:44:47,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 10:44:47,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:47,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:47,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:44:47,828 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:44:47,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:47,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1978685021, now seen corresponding path program 1 times [2023-11-26 10:44:47,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:47,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967353162] [2023-11-26 10:44:47,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:47,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:48,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:48,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:48,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967353162] [2023-11-26 10:44:48,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967353162] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:48,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74452364] [2023-11-26 10:44:48,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:48,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:48,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:48,039 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:48,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:44:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:48,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:44:48,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:48,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:48,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:48,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74452364] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:48,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:44:48,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-26 10:44:48,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346753760] [2023-11-26 10:44:48,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:48,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:44:48,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:48,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:44:48,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:44:48,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2023-11-26 10:44:48,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 80 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 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 10:44:48,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:48,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2023-11-26 10:44:48,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:48,536 INFO L124 PetriNetUnfolderBase]: 466/699 cut-off events. [2023-11-26 10:44:48,536 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-26 10:44:48,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1413 conditions, 699 events. 466/699 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2418 event pairs, 333 based on Foata normal form. 0/546 useless extension candidates. Maximal degree in co-relation 1408. Up to 679 conditions per place. [2023-11-26 10:44:48,543 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 26 selfloop transitions, 4 changer transitions 0/34 dead transitions. [2023-11-26 10:44:48,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 34 transitions, 148 flow [2023-11-26 10:44:48,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:44:48,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:44:48,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2023-11-26 10:44:48,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3526315789473684 [2023-11-26 10:44:48,546 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 67 transitions. [2023-11-26 10:44:48,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 67 transitions. [2023-11-26 10:44:48,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:48,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 67 transitions. [2023-11-26 10:44:48,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 10:44:48,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 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 10:44:48,549 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 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 10:44:48,549 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 80 flow. Second operand 5 states and 67 transitions. [2023-11-26 10:44:48,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 34 transitions, 148 flow [2023-11-26 10:44:48,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 34 transitions, 144 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 10:44:48,551 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 102 flow [2023-11-26 10:44:48,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=102, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-11-26 10:44:48,553 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-11-26 10:44:48,553 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 102 flow [2023-11-26 10:44:48,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 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 10:44:48,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:48,554 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:48,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:48,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:48,762 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:44:48,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:48,762 INFO L85 PathProgramCache]: Analyzing trace with hash 271554205, now seen corresponding path program 2 times [2023-11-26 10:44:48,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:48,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193306780] [2023-11-26 10:44:48,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:48,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:44:49,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:49,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193306780] [2023-11-26 10:44:49,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193306780] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:49,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:49,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:44:49,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346379143] [2023-11-26 10:44:49,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:49,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:44:49,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:49,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:44:49,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:44:49,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2023-11-26 10:44:49,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 10:44:49,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:49,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2023-11-26 10:44:49,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:49,666 INFO L124 PetriNetUnfolderBase]: 832/1271 cut-off events. [2023-11-26 10:44:49,667 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-26 10:44:49,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2542 conditions, 1271 events. 832/1271 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5423 event pairs, 333 based on Foata normal form. 1/1010 useless extension candidates. Maximal degree in co-relation 2535. Up to 682 conditions per place. [2023-11-26 10:44:49,675 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 42 selfloop transitions, 2 changer transitions 20/68 dead transitions. [2023-11-26 10:44:49,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 68 transitions, 305 flow [2023-11-26 10:44:49,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:44:49,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:44:49,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2023-11-26 10:44:49,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5921052631578947 [2023-11-26 10:44:49,677 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 90 transitions. [2023-11-26 10:44:49,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 90 transitions. [2023-11-26 10:44:49,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:49,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 90 transitions. [2023-11-26 10:44:49,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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 10:44:49,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:49,680 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:49,681 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 102 flow. Second operand 4 states and 90 transitions. [2023-11-26 10:44:49,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 68 transitions, 305 flow [2023-11-26 10:44:49,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 68 transitions, 295 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-26 10:44:49,684 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 106 flow [2023-11-26 10:44:49,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2023-11-26 10:44:49,685 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2023-11-26 10:44:49,685 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 106 flow [2023-11-26 10:44:49,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 10:44:49,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:49,685 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:49,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:44:49,686 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:44:49,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:49,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1285882536, now seen corresponding path program 1 times [2023-11-26 10:44:49,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:49,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125543115] [2023-11-26 10:44:49,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:49,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:50,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:44:50,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:50,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125543115] [2023-11-26 10:44:50,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125543115] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:50,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:50,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:44:50,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000721957] [2023-11-26 10:44:50,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:50,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:44:50,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:50,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:44:50,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:44:50,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2023-11-26 10:44:50,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 10:44:50,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:50,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2023-11-26 10:44:50,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:50,639 INFO L124 PetriNetUnfolderBase]: 1150/1730 cut-off events. [2023-11-26 10:44:50,639 INFO L125 PetriNetUnfolderBase]: For 452/452 co-relation queries the response was YES. [2023-11-26 10:44:50,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3821 conditions, 1730 events. 1150/1730 cut-off events. For 452/452 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8024 event pairs, 463 based on Foata normal form. 1/1466 useless extension candidates. Maximal degree in co-relation 3811. Up to 962 conditions per place. [2023-11-26 10:44:50,651 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 44 selfloop transitions, 2 changer transitions 19/69 dead transitions. [2023-11-26 10:44:50,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 69 transitions, 330 flow [2023-11-26 10:44:50,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:44:50,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:44:50,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2023-11-26 10:44:50,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2023-11-26 10:44:50,654 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 88 transitions. [2023-11-26 10:44:50,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 88 transitions. [2023-11-26 10:44:50,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:50,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 88 transitions. [2023-11-26 10:44:50,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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 10:44:50,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:50,659 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:50,659 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 106 flow. Second operand 4 states and 88 transitions. [2023-11-26 10:44:50,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 69 transitions, 330 flow [2023-11-26 10:44:50,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 69 transitions, 322 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-26 10:44:50,665 INFO L231 Difference]: Finished difference. Result has 46 places, 36 transitions, 116 flow [2023-11-26 10:44:50,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=46, PETRI_TRANSITIONS=36} [2023-11-26 10:44:50,668 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2023-11-26 10:44:50,668 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 36 transitions, 116 flow [2023-11-26 10:44:50,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 10:44:50,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:50,668 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:50,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:44:50,669 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:44:50,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:50,669 INFO L85 PathProgramCache]: Analyzing trace with hash -2102480459, now seen corresponding path program 1 times [2023-11-26 10:44:50,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:50,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564547098] [2023-11-26 10:44:50,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:50,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:44:51,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:51,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564547098] [2023-11-26 10:44:51,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564547098] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:51,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454217934] [2023-11-26 10:44:51,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:51,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:51,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:51,987 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:52,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:44:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:52,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-26 10:44:52,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:53,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 68 [2023-11-26 10:44:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:44:54,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:55,786 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:44:55,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 57 [2023-11-26 10:44:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:44:55,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454217934] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:55,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:44:55,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 26 [2023-11-26 10:44:55,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3826337] [2023-11-26 10:44:55,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:55,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-26 10:44:55,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:55,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-26 10:44:55,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-11-26 10:44:55,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2023-11-26 10:44:55,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 116 flow. Second operand has 26 states, 26 states have (on average 9.846153846153847) internal successors, (256), 26 states have internal predecessors, (256), 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 10:44:55,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:55,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2023-11-26 10:44:55,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:02,161 INFO L124 PetriNetUnfolderBase]: 3285/5100 cut-off events. [2023-11-26 10:45:02,161 INFO L125 PetriNetUnfolderBase]: For 1822/1822 co-relation queries the response was YES. [2023-11-26 10:45:02,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11858 conditions, 5100 events. 3285/5100 cut-off events. For 1822/1822 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30662 event pairs, 247 based on Foata normal form. 4/4725 useless extension candidates. Maximal degree in co-relation 11847. Up to 812 conditions per place. [2023-11-26 10:45:02,207 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 212 selfloop transitions, 86 changer transitions 63/365 dead transitions. [2023-11-26 10:45:02,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 365 transitions, 1720 flow [2023-11-26 10:45:02,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-26 10:45:02,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-26 10:45:02,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 600 transitions. [2023-11-26 10:45:02,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45112781954887216 [2023-11-26 10:45:02,212 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 600 transitions. [2023-11-26 10:45:02,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 600 transitions. [2023-11-26 10:45:02,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:02,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 600 transitions. [2023-11-26 10:45:02,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 17.142857142857142) internal successors, (600), 35 states have internal predecessors, (600), 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 10:45:02,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 38.0) internal successors, (1368), 36 states have internal predecessors, (1368), 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 10:45:02,222 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 38.0) internal successors, (1368), 36 states have internal predecessors, (1368), 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 10:45:02,222 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 116 flow. Second operand 35 states and 600 transitions. [2023-11-26 10:45:02,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 365 transitions, 1720 flow [2023-11-26 10:45:02,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 365 transitions, 1689 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-26 10:45:02,233 INFO L231 Difference]: Finished difference. Result has 88 places, 133 transitions, 714 flow [2023-11-26 10:45:02,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=714, PETRI_PLACES=88, PETRI_TRANSITIONS=133} [2023-11-26 10:45:02,234 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 51 predicate places. [2023-11-26 10:45:02,235 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 133 transitions, 714 flow [2023-11-26 10:45:02,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.846153846153847) internal successors, (256), 26 states have internal predecessors, (256), 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 10:45:02,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:02,236 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:02,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:02,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:02,443 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:45:02,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:02,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1492632307, now seen corresponding path program 2 times [2023-11-26 10:45:02,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:02,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948072913] [2023-11-26 10:45:02,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:02,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:45:03,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:03,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948072913] [2023-11-26 10:45:03,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948072913] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:03,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236637191] [2023-11-26 10:45:03,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:45:03,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:03,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:03,796 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:03,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:45:03,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:45:03,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:45:03,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-26 10:45:03,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:05,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 87 [2023-11-26 10:45:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:45:05,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:06,902 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-26 10:45:06,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 70 [2023-11-26 10:45:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:45:07,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236637191] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:07,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:07,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 25 [2023-11-26 10:45:07,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162930693] [2023-11-26 10:45:07,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:07,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 10:45:07,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:07,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 10:45:07,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2023-11-26 10:45:07,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2023-11-26 10:45:07,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 133 transitions, 714 flow. Second operand has 25 states, 25 states have (on average 9.8) internal successors, (245), 25 states have internal predecessors, (245), 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 10:45:07,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:07,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2023-11-26 10:45:07,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:17,000 INFO L124 PetriNetUnfolderBase]: 7265/11568 cut-off events. [2023-11-26 10:45:17,000 INFO L125 PetriNetUnfolderBase]: For 45351/45371 co-relation queries the response was YES. [2023-11-26 10:45:17,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39576 conditions, 11568 events. 7265/11568 cut-off events. For 45351/45371 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 81156 event pairs, 970 based on Foata normal form. 17/11548 useless extension candidates. Maximal degree in co-relation 39555. Up to 2173 conditions per place. [2023-11-26 10:45:17,113 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 345 selfloop transitions, 157 changer transitions 93/599 dead transitions. [2023-11-26 10:45:17,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 599 transitions, 4159 flow [2023-11-26 10:45:17,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-26 10:45:17,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-26 10:45:17,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 664 transitions. [2023-11-26 10:45:17,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4853801169590643 [2023-11-26 10:45:17,118 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 664 transitions. [2023-11-26 10:45:17,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 664 transitions. [2023-11-26 10:45:17,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:17,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 664 transitions. [2023-11-26 10:45:17,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 18.444444444444443) internal successors, (664), 36 states have internal predecessors, (664), 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 10:45:17,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 38.0) internal successors, (1406), 37 states have internal predecessors, (1406), 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 10:45:17,126 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 38.0) internal successors, (1406), 37 states have internal predecessors, (1406), 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 10:45:17,127 INFO L175 Difference]: Start difference. First operand has 88 places, 133 transitions, 714 flow. Second operand 36 states and 664 transitions. [2023-11-26 10:45:17,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 599 transitions, 4159 flow [2023-11-26 10:45:17,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 599 transitions, 3792 flow, removed 166 selfloop flow, removed 8 redundant places. [2023-11-26 10:45:17,596 INFO L231 Difference]: Finished difference. Result has 140 places, 260 transitions, 2261 flow [2023-11-26 10:45:17,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2261, PETRI_PLACES=140, PETRI_TRANSITIONS=260} [2023-11-26 10:45:17,597 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 103 predicate places. [2023-11-26 10:45:17,597 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 260 transitions, 2261 flow [2023-11-26 10:45:17,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.8) internal successors, (245), 25 states have internal predecessors, (245), 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 10:45:17,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:17,598 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:17,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:17,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:17,806 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:45:17,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:17,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1764585695, now seen corresponding path program 3 times [2023-11-26 10:45:17,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:17,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681812397] [2023-11-26 10:45:17,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:17,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:19,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:19,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681812397] [2023-11-26 10:45:19,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681812397] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:19,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096357574] [2023-11-26 10:45:19,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:45:19,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:19,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:19,487 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:19,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46e2696f-6216-40ad-8558-91aa367931fe/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:45:19,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 10:45:19,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:45:19,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-26 10:45:19,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:20,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2023-11-26 10:45:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:45:20,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:21,446 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:45:21,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 62 [2023-11-26 10:45:21,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:45:21,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096357574] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:21,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:21,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 29 [2023-11-26 10:45:21,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977176609] [2023-11-26 10:45:21,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:21,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-26 10:45:21,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:21,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-26 10:45:21,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2023-11-26 10:45:21,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2023-11-26 10:45:21,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 260 transitions, 2261 flow. Second operand has 29 states, 29 states have (on average 9.551724137931034) internal successors, (277), 29 states have internal predecessors, (277), 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 10:45:21,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:21,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2023-11-26 10:45:21,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand