./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive.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_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/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_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/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_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/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 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:55:17,823 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:55:17,928 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:55:17,934 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:55:17,935 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:55:17,961 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:55:17,962 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:55:17,963 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:55:17,964 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:55:17,964 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:55:17,965 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:55:17,966 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:55:17,966 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:55:17,967 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:55:17,968 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:55:17,968 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:55:17,969 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:55:17,969 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:55:17,970 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:55:17,970 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:55:17,971 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:55:17,971 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:55:17,972 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:55:17,972 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:55:17,973 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:55:17,973 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:55:17,974 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:55:17,974 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:55:17,975 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:55:17,975 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:55:17,975 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:55:17,976 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:55:17,976 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:55:17,977 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:55:17,977 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:55:17,978 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:55:17,978 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:55:17,979 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:55:17,979 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:55:17,979 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:55:17,980 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:55:17,980 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:55:17,981 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_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 [2023-11-26 11:55:18,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:55:18,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:55:18,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:55:18,336 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:55:18,337 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:55:18,338 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2023-11-26 11:55:21,597 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:55:21,875 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:55:21,876 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2023-11-26 11:55:21,887 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/data/9823dd47e/433cdd36801b4e4e9deb01d57b392d53/FLAGbb48ee481 [2023-11-26 11:55:21,906 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/data/9823dd47e/433cdd36801b4e4e9deb01d57b392d53 [2023-11-26 11:55:21,909 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:55:21,911 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:55:21,913 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:21,913 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:55:21,920 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:55:21,921 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:21" (1/1) ... [2023-11-26 11:55:21,923 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a4cfa26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:21, skipping insertion in model container [2023-11-26 11:55:21,923 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:21" (1/1) ... [2023-11-26 11:55:21,963 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:55:22,185 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_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3146,3159] [2023-11-26 11:55:22,197 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:22,209 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:55:22,242 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_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3146,3159] [2023-11-26 11:55:22,246 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:22,256 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:55:22,257 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:55:22,266 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:55:22,267 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:22 WrapperNode [2023-11-26 11:55:22,267 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:22,269 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:22,269 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:55:22,270 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:55:22,279 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:22" (1/1) ... [2023-11-26 11:55:22,289 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:22" (1/1) ... [2023-11-26 11:55:22,319 INFO L138 Inliner]: procedures = 25, calls = 52, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 166 [2023-11-26 11:55:22,319 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:22,320 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:55:22,320 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:55:22,320 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:55:22,334 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:22" (1/1) ... [2023-11-26 11:55:22,334 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:22" (1/1) ... [2023-11-26 11:55:22,339 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:22" (1/1) ... [2023-11-26 11:55:22,358 INFO L175 MemorySlicer]: Split 12 memory accesses to 5 slices as follows [2, 4, 2, 2, 2]. 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 11:55:22,359 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:22" (1/1) ... [2023-11-26 11:55:22,359 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:22" (1/1) ... [2023-11-26 11:55:22,369 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:22" (1/1) ... [2023-11-26 11:55:22,374 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:22" (1/1) ... [2023-11-26 11:55:22,376 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:22" (1/1) ... [2023-11-26 11:55:22,378 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:22" (1/1) ... [2023-11-26 11:55:22,383 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:55:22,384 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:55:22,385 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:55:22,385 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:55:22,386 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:22" (1/1) ... [2023-11-26 11:55:22,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:55:22,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:22,439 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:55:22,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:55:22,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:55:22,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:55:22,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:55:22,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:55:22,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:55:22,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:55:22,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 11:55:22,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:55:22,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:55:22,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:55:22,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:55:22,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 11:55:22,484 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:55:22,484 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:55:22,484 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:55:22,485 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:55:22,485 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-26 11:55:22,485 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-26 11:55:22,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:55:22,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:55:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:55:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:55:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 11:55:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 11:55:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 11:55:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:55:22,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:55:22,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:55:22,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:55:22,489 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 11:55:22,631 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:55:22,633 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:55:23,030 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:55:23,445 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:55:23,445 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 11:55:23,446 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:55:23 BoogieIcfgContainer [2023-11-26 11:55:23,446 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:55:23,449 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:55:23,449 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:55:23,453 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:55:23,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:55:21" (1/3) ... [2023-11-26 11:55:23,454 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71674953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:55:23, skipping insertion in model container [2023-11-26 11:55:23,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:22" (2/3) ... [2023-11-26 11:55:23,455 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71674953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:55:23, skipping insertion in model container [2023-11-26 11:55:23,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:55:23" (3/3) ... [2023-11-26 11:55:23,457 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2023-11-26 11:55:23,467 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:55:23,479 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:55:23,479 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:55:23,480 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:55:23,551 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-26 11:55:23,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 39 transitions, 99 flow [2023-11-26 11:55:23,629 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2023-11-26 11:55:23,630 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 11:55:23,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 36 events. 4/36 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 57 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2023-11-26 11:55:23,634 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 39 transitions, 99 flow [2023-11-26 11:55:23,638 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 35 transitions, 88 flow [2023-11-26 11:55:23,650 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:55:23,658 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;@1350d771, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:55:23,658 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-26 11:55:23,689 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:55:23,689 INFO L124 PetriNetUnfolderBase]: 4/34 cut-off events. [2023-11-26 11:55:23,689 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 11:55:23,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:23,690 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 11:55:23,691 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 11:55:23,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:23,698 INFO L85 PathProgramCache]: Analyzing trace with hash -779910303, now seen corresponding path program 1 times [2023-11-26 11:55:23,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:23,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772230973] [2023-11-26 11:55:23,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:23,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:24,663 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 11:55:24,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:24,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772230973] [2023-11-26 11:55:24,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772230973] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:24,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:24,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:55:24,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765266804] [2023-11-26 11:55:24,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:24,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:55:24,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:24,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:55:24,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:55:24,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2023-11-26 11:55:24,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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 11:55:24,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:24,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2023-11-26 11:55:24,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:25,227 INFO L124 PetriNetUnfolderBase]: 583/994 cut-off events. [2023-11-26 11:55:25,228 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-26 11:55:25,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1939 conditions, 994 events. 583/994 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4883 event pairs, 38 based on Foata normal form. 104/1031 useless extension candidates. Maximal degree in co-relation 1861. Up to 280 conditions per place. [2023-11-26 11:55:25,251 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 63 selfloop transitions, 5 changer transitions 0/78 dead transitions. [2023-11-26 11:55:25,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 78 transitions, 322 flow [2023-11-26 11:55:25,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:55:25,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:55:25,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2023-11-26 11:55:25,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6367521367521367 [2023-11-26 11:55:25,294 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 149 transitions. [2023-11-26 11:55:25,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 149 transitions. [2023-11-26 11:55:25,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:25,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 149 transitions. [2023-11-26 11:55:25,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 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 11:55:25,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 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 11:55:25,307 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 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 11:55:25,309 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 88 flow. Second operand 6 states and 149 transitions. [2023-11-26 11:55:25,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 78 transitions, 322 flow [2023-11-26 11:55:25,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 78 transitions, 302 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-26 11:55:25,319 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 110 flow [2023-11-26 11:55:25,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=110, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-11-26 11:55:25,326 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-11-26 11:55:25,326 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 110 flow [2023-11-26 11:55:25,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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 11:55:25,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:25,327 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 11:55:25,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:55:25,328 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 11:55:25,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:25,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1650889046, now seen corresponding path program 1 times [2023-11-26 11:55:25,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:25,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756816414] [2023-11-26 11:55:25,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:25,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:25,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:25,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756816414] [2023-11-26 11:55:25,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756816414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:25,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:25,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:55:25,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539189001] [2023-11-26 11:55:25,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:25,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:55:25,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:25,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:55:25,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:55:25,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 39 [2023-11-26 11:55:25,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 11:55:25,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:25,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 39 [2023-11-26 11:55:25,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:25,638 INFO L124 PetriNetUnfolderBase]: 247/482 cut-off events. [2023-11-26 11:55:25,639 INFO L125 PetriNetUnfolderBase]: For 543/637 co-relation queries the response was YES. [2023-11-26 11:55:25,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1062 conditions, 482 events. 247/482 cut-off events. For 543/637 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2208 event pairs, 87 based on Foata normal form. 110/523 useless extension candidates. Maximal degree in co-relation 462. Up to 317 conditions per place. [2023-11-26 11:55:25,646 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 26 selfloop transitions, 3 changer transitions 2/46 dead transitions. [2023-11-26 11:55:25,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 189 flow [2023-11-26 11:55:25,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:55:25,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:55:25,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2023-11-26 11:55:25,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6752136752136753 [2023-11-26 11:55:25,653 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 79 transitions. [2023-11-26 11:55:25,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 79 transitions. [2023-11-26 11:55:25,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:25,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 79 transitions. [2023-11-26 11:55:25,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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 11:55:25,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 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 11:55:25,669 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 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 11:55:25,669 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 110 flow. Second operand 3 states and 79 transitions. [2023-11-26 11:55:25,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 189 flow [2023-11-26 11:55:25,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 185 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:55:25,675 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 125 flow [2023-11-26 11:55:25,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-11-26 11:55:25,679 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2023-11-26 11:55:25,679 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 125 flow [2023-11-26 11:55:25,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 11:55:25,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:25,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:25,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:55:25,681 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 11:55:25,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:25,683 INFO L85 PathProgramCache]: Analyzing trace with hash -772483127, now seen corresponding path program 1 times [2023-11-26 11:55:25,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:25,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625650092] [2023-11-26 11:55:25,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:25,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:55:25,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:25,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625650092] [2023-11-26 11:55:25,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625650092] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:25,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:25,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:55:25,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222549411] [2023-11-26 11:55:25,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:25,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:55:25,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:25,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:55:25,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:55:25,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 39 [2023-11-26 11:55:25,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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 11:55:25,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:25,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 39 [2023-11-26 11:55:25,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:26,077 INFO L124 PetriNetUnfolderBase]: 260/507 cut-off events. [2023-11-26 11:55:26,078 INFO L125 PetriNetUnfolderBase]: For 687/822 co-relation queries the response was YES. [2023-11-26 11:55:26,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1234 conditions, 507 events. 260/507 cut-off events. For 687/822 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2323 event pairs, 157 based on Foata normal form. 125/556 useless extension candidates. Maximal degree in co-relation 972. Up to 365 conditions per place. [2023-11-26 11:55:26,084 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 24 selfloop transitions, 2 changer transitions 10/51 dead transitions. [2023-11-26 11:55:26,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 51 transitions, 222 flow [2023-11-26 11:55:26,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:55:26,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:55:26,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2023-11-26 11:55:26,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2023-11-26 11:55:26,087 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 98 transitions. [2023-11-26 11:55:26,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 98 transitions. [2023-11-26 11:55:26,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:26,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 98 transitions. [2023-11-26 11:55:26,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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 11:55:26,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 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 11:55:26,090 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 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 11:55:26,090 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 125 flow. Second operand 4 states and 98 transitions. [2023-11-26 11:55:26,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 51 transitions, 222 flow [2023-11-26 11:55:26,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:55:26,095 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 136 flow [2023-11-26 11:55:26,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2023-11-26 11:55:26,096 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2023-11-26 11:55:26,097 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 136 flow [2023-11-26 11:55:26,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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 11:55:26,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:26,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:26,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:55:26,098 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 11:55:26,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:26,099 INFO L85 PathProgramCache]: Analyzing trace with hash -425765083, now seen corresponding path program 1 times [2023-11-26 11:55:26,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:26,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059527152] [2023-11-26 11:55:26,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:26,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:55:26,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:26,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059527152] [2023-11-26 11:55:26,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059527152] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:26,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513687148] [2023-11-26 11:55:26,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:26,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:26,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:26,293 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:26,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:55:26,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:26,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:55:26,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:55:26,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:55:26,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513687148] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:26,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:26,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 7 [2023-11-26 11:55:26,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570827515] [2023-11-26 11:55:26,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:26,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:55:26,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:26,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:55:26,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:55:26,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2023-11-26 11:55:26,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 136 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 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 11:55:26,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:26,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2023-11-26 11:55:26,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:27,434 INFO L124 PetriNetUnfolderBase]: 1093/1765 cut-off events. [2023-11-26 11:55:27,435 INFO L125 PetriNetUnfolderBase]: For 1955/2263 co-relation queries the response was YES. [2023-11-26 11:55:27,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4537 conditions, 1765 events. 1093/1765 cut-off events. For 1955/2263 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 8942 event pairs, 122 based on Foata normal form. 352/2005 useless extension candidates. Maximal degree in co-relation 4520. Up to 540 conditions per place. [2023-11-26 11:55:27,455 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 76 selfloop transitions, 13 changer transitions 15/112 dead transitions. [2023-11-26 11:55:27,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 112 transitions, 597 flow [2023-11-26 11:55:27,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:55:27,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:55:27,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2023-11-26 11:55:27,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49743589743589745 [2023-11-26 11:55:27,462 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 194 transitions. [2023-11-26 11:55:27,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 194 transitions. [2023-11-26 11:55:27,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:27,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 194 transitions. [2023-11-26 11:55:27,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 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 11:55:27,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 39.0) internal successors, (429), 11 states have internal predecessors, (429), 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 11:55:27,476 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 39.0) internal successors, (429), 11 states have internal predecessors, (429), 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 11:55:27,477 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 136 flow. Second operand 10 states and 194 transitions. [2023-11-26 11:55:27,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 112 transitions, 597 flow [2023-11-26 11:55:27,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 112 transitions, 585 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-26 11:55:27,490 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 206 flow [2023-11-26 11:55:27,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=206, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2023-11-26 11:55:27,493 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2023-11-26 11:55:27,493 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 206 flow [2023-11-26 11:55:27,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 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 11:55:27,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:27,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:27,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:27,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:27,712 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 11:55:27,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:27,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1037776093, now seen corresponding path program 2 times [2023-11-26 11:55:27,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:27,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397600171] [2023-11-26 11:55:27,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:27,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:29,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:29,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397600171] [2023-11-26 11:55:29,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397600171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:29,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432489921] [2023-11-26 11:55:29,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:55:29,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:29,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:29,101 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:29,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:55:29,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:55:29,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:29,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-26 11:55:29,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:29,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-26 11:55:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:29,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:30,801 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 61 treesize of output 55 [2023-11-26 11:55:30,822 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:55:30,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 78 treesize of output 68 [2023-11-26 11:55:31,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:31,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432489921] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:31,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:31,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 27 [2023-11-26 11:55:31,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217106494] [2023-11-26 11:55:31,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:31,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-26 11:55:31,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:31,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-26 11:55:31,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2023-11-26 11:55:31,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2023-11-26 11:55:31,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 206 flow. Second operand has 28 states, 28 states have (on average 10.714285714285714) internal successors, (300), 28 states have internal predecessors, (300), 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 11:55:31,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:31,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2023-11-26 11:55:31,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:39,673 INFO L124 PetriNetUnfolderBase]: 9153/14335 cut-off events. [2023-11-26 11:55:39,674 INFO L125 PetriNetUnfolderBase]: For 15245/15245 co-relation queries the response was YES. [2023-11-26 11:55:39,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40572 conditions, 14335 events. 9153/14335 cut-off events. For 15245/15245 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 88688 event pairs, 465 based on Foata normal form. 1268/15598 useless extension candidates. Maximal degree in co-relation 29601. Up to 2024 conditions per place. [2023-11-26 11:55:39,789 INFO L140 encePairwiseOnDemand]: 23/39 looper letters, 425 selfloop transitions, 150 changer transitions 159/739 dead transitions. [2023-11-26 11:55:39,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 739 transitions, 4412 flow [2023-11-26 11:55:39,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-11-26 11:55:39,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2023-11-26 11:55:39,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 1238 transitions. [2023-11-26 11:55:39,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42896742896742895 [2023-11-26 11:55:39,799 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 1238 transitions. [2023-11-26 11:55:39,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 1238 transitions. [2023-11-26 11:55:39,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:39,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 1238 transitions. [2023-11-26 11:55:39,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 16.72972972972973) internal successors, (1238), 74 states have internal predecessors, (1238), 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 11:55:39,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 39.0) internal successors, (2925), 75 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:39,818 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 39.0) internal successors, (2925), 75 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:39,818 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 206 flow. Second operand 74 states and 1238 transitions. [2023-11-26 11:55:39,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 739 transitions, 4412 flow [2023-11-26 11:55:39,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 739 transitions, 4387 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:55:40,002 INFO L231 Difference]: Finished difference. Result has 168 places, 210 transitions, 1540 flow [2023-11-26 11:55:40,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=1540, PETRI_PLACES=168, PETRI_TRANSITIONS=210} [2023-11-26 11:55:40,005 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2023-11-26 11:55:40,006 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 210 transitions, 1540 flow [2023-11-26 11:55:40,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.714285714285714) internal successors, (300), 28 states have internal predecessors, (300), 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 11:55:40,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:40,007 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:40,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:40,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:40,215 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 11:55:40,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:40,216 INFO L85 PathProgramCache]: Analyzing trace with hash 47955645, now seen corresponding path program 3 times [2023-11-26 11:55:40,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:40,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739487266] [2023-11-26 11:55:40,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:40,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:41,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:41,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:41,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739487266] [2023-11-26 11:55:41,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739487266] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:41,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259879587] [2023-11-26 11:55:41,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:55:41,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:41,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:41,821 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:41,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:55:41,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 11:55:41,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:41,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-26 11:55:41,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:55:42,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:42,440 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:55:42,440 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 40 treesize of output 24 [2023-11-26 11:55:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:55:42,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259879587] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:42,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:42,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 25 [2023-11-26 11:55:42,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761903328] [2023-11-26 11:55:42,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:42,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-26 11:55:42,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:42,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-26 11:55:42,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2023-11-26 11:55:42,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2023-11-26 11:55:42,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 210 transitions, 1540 flow. Second operand has 26 states, 26 states have (on average 11.846153846153847) internal successors, (308), 26 states have internal predecessors, (308), 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 11:55:42,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:42,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2023-11-26 11:55:42,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:47,133 INFO L124 PetriNetUnfolderBase]: 6769/10416 cut-off events. [2023-11-26 11:55:47,133 INFO L125 PetriNetUnfolderBase]: For 141320/141510 co-relation queries the response was YES. [2023-11-26 11:55:47,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45529 conditions, 10416 events. 6769/10416 cut-off events. For 141320/141510 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 58023 event pairs, 474 based on Foata normal form. 166/10508 useless extension candidates. Maximal degree in co-relation 39273. Up to 2342 conditions per place. [2023-11-26 11:55:47,295 INFO L140 encePairwiseOnDemand]: 24/39 looper letters, 258 selfloop transitions, 183 changer transitions 78/538 dead transitions. [2023-11-26 11:55:47,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 538 transitions, 4873 flow [2023-11-26 11:55:47,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-26 11:55:47,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-26 11:55:47,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 557 transitions. [2023-11-26 11:55:47,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4200603318250377 [2023-11-26 11:55:47,317 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 557 transitions. [2023-11-26 11:55:47,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 557 transitions. [2023-11-26 11:55:47,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:47,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 557 transitions. [2023-11-26 11:55:47,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 16.38235294117647) internal successors, (557), 34 states have internal predecessors, (557), 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 11:55:47,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 39.0) internal successors, (1365), 35 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:47,334 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 39.0) internal successors, (1365), 35 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:47,334 INFO L175 Difference]: Start difference. First operand has 168 places, 210 transitions, 1540 flow. Second operand 34 states and 557 transitions. [2023-11-26 11:55:47,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 538 transitions, 4873 flow [2023-11-26 11:55:47,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 538 transitions, 4493 flow, removed 141 selfloop flow, removed 10 redundant places. [2023-11-26 11:55:47,965 INFO L231 Difference]: Finished difference. Result has 206 places, 289 transitions, 2615 flow [2023-11-26 11:55:47,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1311, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2615, PETRI_PLACES=206, PETRI_TRANSITIONS=289} [2023-11-26 11:55:47,967 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2023-11-26 11:55:47,967 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 289 transitions, 2615 flow [2023-11-26 11:55:47,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 11.846153846153847) internal successors, (308), 26 states have internal predecessors, (308), 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 11:55:47,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:47,968 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1] [2023-11-26 11:55:47,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:48,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:48,174 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 11:55:48,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:48,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1080903924, now seen corresponding path program 4 times [2023-11-26 11:55:48,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:48,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902761083] [2023-11-26 11:55:48,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:48,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:55:48,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:48,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902761083] [2023-11-26 11:55:48,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902761083] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:48,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194771704] [2023-11-26 11:55:48,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:55:48,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:48,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:48,307 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:48,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:55:48,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:55:48,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:48,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:55:48,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:55:48,479 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:48,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194771704] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:48,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:55:48,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-11-26 11:55:48,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223966433] [2023-11-26 11:55:48,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:48,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:55:48,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:48,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:55:48,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:55:48,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 39 [2023-11-26 11:55:48,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 289 transitions, 2615 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 11:55:48,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:48,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 39 [2023-11-26 11:55:48,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:50,167 INFO L124 PetriNetUnfolderBase]: 3545/6752 cut-off events. [2023-11-26 11:55:50,168 INFO L125 PetriNetUnfolderBase]: For 152872/153399 co-relation queries the response was YES. [2023-11-26 11:55:50,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40691 conditions, 6752 events. 3545/6752 cut-off events. For 152872/153399 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 47493 event pairs, 844 based on Foata normal form. 327/6592 useless extension candidates. Maximal degree in co-relation 36024. Up to 2614 conditions per place. [2023-11-26 11:55:50,366 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 193 selfloop transitions, 81 changer transitions 0/389 dead transitions. [2023-11-26 11:55:50,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 389 transitions, 4102 flow [2023-11-26 11:55:50,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:55:50,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:55:50,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2023-11-26 11:55:50,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7435897435897436 [2023-11-26 11:55:50,369 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 116 transitions. [2023-11-26 11:55:50,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 116 transitions. [2023-11-26 11:55:50,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:50,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 116 transitions. [2023-11-26 11:55:50,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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 11:55:50,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 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 11:55:50,372 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 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 11:55:50,372 INFO L175 Difference]: Start difference. First operand has 206 places, 289 transitions, 2615 flow. Second operand 4 states and 116 transitions. [2023-11-26 11:55:50,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 389 transitions, 4102 flow [2023-11-26 11:55:50,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 389 transitions, 3808 flow, removed 95 selfloop flow, removed 7 redundant places. [2023-11-26 11:55:50,670 INFO L231 Difference]: Finished difference. Result has 204 places, 358 transitions, 3433 flow [2023-11-26 11:55:50,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2357, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3433, PETRI_PLACES=204, PETRI_TRANSITIONS=358} [2023-11-26 11:55:50,673 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2023-11-26 11:55:50,673 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 358 transitions, 3433 flow [2023-11-26 11:55:50,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 11:55:50,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:50,674 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2023-11-26 11:55:50,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:50,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:50,882 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 11:55:50,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:50,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1252251453, now seen corresponding path program 5 times [2023-11-26 11:55:50,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:50,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489904765] [2023-11-26 11:55:50,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:50,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:55:51,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:51,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489904765] [2023-11-26 11:55:51,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489904765] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:51,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:51,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:55:51,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025449953] [2023-11-26 11:55:51,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:51,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:55:51,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:51,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:55:51,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:55:51,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2023-11-26 11:55:51,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 358 transitions, 3433 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 11:55:51,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:51,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2023-11-26 11:55:51,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:53,245 INFO L124 PetriNetUnfolderBase]: 4670/8395 cut-off events. [2023-11-26 11:55:53,246 INFO L125 PetriNetUnfolderBase]: For 191395/192116 co-relation queries the response was YES. [2023-11-26 11:55:53,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52080 conditions, 8395 events. 4670/8395 cut-off events. For 191395/192116 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 55764 event pairs, 1062 based on Foata normal form. 649/8702 useless extension candidates. Maximal degree in co-relation 47394. Up to 3782 conditions per place. [2023-11-26 11:55:53,354 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 226 selfloop transitions, 20 changer transitions 3/310 dead transitions. [2023-11-26 11:55:53,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 310 transitions, 3648 flow [2023-11-26 11:55:53,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:55:53,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:55:53,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2023-11-26 11:55:53,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2023-11-26 11:55:53,356 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 96 transitions. [2023-11-26 11:55:53,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 96 transitions. [2023-11-26 11:55:53,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:53,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 96 transitions. [2023-11-26 11:55:53,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 11:55:53,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 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 11:55:53,358 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 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 11:55:53,358 INFO L175 Difference]: Start difference. First operand has 204 places, 358 transitions, 3433 flow. Second operand 4 states and 96 transitions. [2023-11-26 11:55:53,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 310 transitions, 3648 flow [2023-11-26 11:55:53,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 310 transitions, 3492 flow, removed 76 selfloop flow, removed 12 redundant places. [2023-11-26 11:55:53,742 INFO L231 Difference]: Finished difference. Result has 178 places, 264 transitions, 2652 flow [2023-11-26 11:55:53,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2533, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2652, PETRI_PLACES=178, PETRI_TRANSITIONS=264} [2023-11-26 11:55:53,746 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2023-11-26 11:55:53,746 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 264 transitions, 2652 flow [2023-11-26 11:55:53,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 11:55:53,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:53,747 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1] [2023-11-26 11:55:53,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:55:53,747 INFO L420 AbstractCegarLoop]: === Iteration 9 === 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 11:55:53,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:53,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1933708731, now seen corresponding path program 1 times [2023-11-26 11:55:53,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:53,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417927855] [2023-11-26 11:55:53,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:53,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:55,332 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:55,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:55,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417927855] [2023-11-26 11:55:55,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417927855] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:55,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720934802] [2023-11-26 11:55:55,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:55,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:55,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:55,335 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:55,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee41bf18-9d80-48d0-88b8-edfc9d1fdb64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:55:55,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:55,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-26 11:55:55,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:56,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:56,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:55:56,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2023-11-26 11:55:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:57,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720934802] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:57,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:57,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 37 [2023-11-26 11:55:57,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751725550] [2023-11-26 11:55:57,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:57,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-26 11:55:57,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:57,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-26 11:55:57,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1185, Unknown=0, NotChecked=0, Total=1406 [2023-11-26 11:55:57,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2023-11-26 11:55:57,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 264 transitions, 2652 flow. Second operand has 38 states, 38 states have (on average 12.210526315789474) internal successors, (464), 38 states have internal predecessors, (464), 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 11:55:57,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:57,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2023-11-26 11:55:57,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand