./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/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_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/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_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/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 cc67bee348fb2ffff05c0616660a93fb872177c05d08813d910a29641aea282e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:44:20,415 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:44:20,510 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:44:20,516 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:44:20,517 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:44:20,545 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:44:20,545 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:44:20,546 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:44:20,547 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:44:20,548 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:44:20,549 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:44:20,549 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:44:20,550 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:44:20,551 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:44:20,552 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:44:20,552 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:44:20,553 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:44:20,554 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:44:20,554 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:44:20,555 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:44:20,556 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:44:20,563 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:44:20,564 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:44:20,564 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:44:20,569 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:44:20,570 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:44:20,570 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:44:20,572 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:44:20,573 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:44:20,574 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:44:20,575 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:44:20,575 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:44:20,576 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:44:20,576 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:44:20,576 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:44:20,577 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:44:20,577 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:44:20,577 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:44:20,577 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:44:20,578 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:44:20,578 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:44:20,578 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:44:20,579 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_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc67bee348fb2ffff05c0616660a93fb872177c05d08813d910a29641aea282e [2023-11-26 10:44:20,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:44:20,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:44:20,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:44:20,937 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:44:20,937 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:44:20,939 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2023-11-26 10:44:24,088 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:44:24,302 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:44:24,302 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2023-11-26 10:44:24,311 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/bin/uautomizer-verify-VRDe98Ueme/data/7275747f2/e37e87cb67544749ab271e25e81d12ef/FLAG6330a9be3 [2023-11-26 10:44:24,326 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/bin/uautomizer-verify-VRDe98Ueme/data/7275747f2/e37e87cb67544749ab271e25e81d12ef [2023-11-26 10:44:24,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:44:24,331 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:44:24,332 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:44:24,332 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:44:24,338 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:44:24,339 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:44:24" (1/1) ... [2023-11-26 10:44:24,340 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2286050e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:24, skipping insertion in model container [2023-11-26 10:44:24,340 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:44:24" (1/1) ... [2023-11-26 10:44:24,369 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:44:24,567 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_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c[2572,2585] [2023-11-26 10:44:24,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:44:24,609 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:44:24,634 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_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c[2572,2585] [2023-11-26 10:44:24,639 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:44:24,647 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:44:24,648 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:44:24,656 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:44:24,656 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:24 WrapperNode [2023-11-26 10:44:24,656 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:44:24,658 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:44:24,658 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:44:24,658 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:44:24,664 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:24" (1/1) ... [2023-11-26 10:44:24,675 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:24" (1/1) ... [2023-11-26 10:44:24,723 INFO L138 Inliner]: procedures = 25, calls = 46, calls flagged for inlining = 13, calls inlined = 19, statements flattened = 234 [2023-11-26 10:44:24,724 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:44:24,725 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:44:24,725 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:44:24,725 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:44:24,737 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:24" (1/1) ... [2023-11-26 10:44:24,737 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:24" (1/1) ... [2023-11-26 10:44:24,742 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:24" (1/1) ... [2023-11-26 10:44:24,761 INFO L175 MemorySlicer]: Split 16 memory accesses to 5 slices as follows [2, 2, 2, 8, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-26 10:44:24,762 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:24" (1/1) ... [2023-11-26 10:44:24,762 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:24" (1/1) ... [2023-11-26 10:44:24,774 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:24" (1/1) ... [2023-11-26 10:44:24,778 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:24" (1/1) ... [2023-11-26 10:44:24,781 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:24" (1/1) ... [2023-11-26 10:44:24,784 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:24" (1/1) ... [2023-11-26 10:44:24,789 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:44:24,790 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:44:24,790 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:44:24,790 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:44:24,791 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:24" (1/1) ... [2023-11-26 10:44:24,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:44:24,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:24,828 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:44:24,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:44:24,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:44:24,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:44:24,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:44:24,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:44:24,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:44:24,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 10:44:24,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 10:44:24,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:44:24,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:44:24,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:44:24,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 10:44:24,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 10:44:24,873 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 10:44:24,873 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 10:44:24,873 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 10:44:24,874 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 10:44:24,874 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-26 10:44:24,874 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-26 10:44:24,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:44:24,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:44:24,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:44:24,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:44:24,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 10:44:24,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 10:44:24,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 10:44:24,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 10:44:24,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:44:24,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:44:24,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:44:24,878 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 10:44:25,018 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:44:25,020 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:44:25,503 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:44:25,915 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:44:25,915 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-26 10:44:25,916 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:44:25 BoogieIcfgContainer [2023-11-26 10:44:25,916 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:44:25,923 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:44:25,923 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:44:25,926 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:44:25,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:44:24" (1/3) ... [2023-11-26 10:44:25,930 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48192ebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:44:25, skipping insertion in model container [2023-11-26 10:44:25,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:24" (2/3) ... [2023-11-26 10:44:25,930 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48192ebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:44:25, skipping insertion in model container [2023-11-26 10:44:25,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:44:25" (3/3) ... [2023-11-26 10:44:25,932 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-mts.wvr.c [2023-11-26 10:44:25,944 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 10:44:25,955 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:44:25,955 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:44:25,955 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:44:26,026 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-26 10:44:26,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 31 transitions, 83 flow [2023-11-26 10:44:26,117 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2023-11-26 10:44:26,117 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 10:44:26,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 28 events. 4/28 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2023-11-26 10:44:26,121 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 31 transitions, 83 flow [2023-11-26 10:44:26,124 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 27 transitions, 72 flow [2023-11-26 10:44:26,134 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:44:26,141 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;@4cf2472a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:44:26,141 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-26 10:44:26,154 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:44:26,154 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2023-11-26 10:44:26,154 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 10:44:26,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:26,155 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] [2023-11-26 10:44:26,156 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:44:26,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:26,162 INFO L85 PathProgramCache]: Analyzing trace with hash -524449101, now seen corresponding path program 1 times [2023-11-26 10:44:26,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:26,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587254601] [2023-11-26 10:44:26,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:26,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:26,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:26,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:26,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587254601] [2023-11-26 10:44:26,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587254601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:26,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:26,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:44:26,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520266747] [2023-11-26 10:44:26,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:26,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:26,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:26,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:26,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:26,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2023-11-26 10:44:26,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:26,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:26,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2023-11-26 10:44:26,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:27,131 INFO L124 PetriNetUnfolderBase]: 488/738 cut-off events. [2023-11-26 10:44:27,132 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2023-11-26 10:44:27,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1536 conditions, 738 events. 488/738 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2605 event pairs, 138 based on Foata normal form. 1/612 useless extension candidates. Maximal degree in co-relation 1176. Up to 474 conditions per place. [2023-11-26 10:44:27,143 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 39 selfloop transitions, 4 changer transitions 1/46 dead transitions. [2023-11-26 10:44:27,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 46 transitions, 213 flow [2023-11-26 10:44:27,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:44:27,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:44:27,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2023-11-26 10:44:27,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6451612903225806 [2023-11-26 10:44:27,158 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 60 transitions. [2023-11-26 10:44:27,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 60 transitions. [2023-11-26 10:44:27,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:27,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 60 transitions. [2023-11-26 10:44:27,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:27,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 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 10:44:27,169 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 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 10:44:27,171 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 72 flow. Second operand 3 states and 60 transitions. [2023-11-26 10:44:27,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 46 transitions, 213 flow [2023-11-26 10:44:27,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 46 transitions, 191 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-26 10:44:27,181 INFO L231 Difference]: Finished difference. Result has 30 places, 30 transitions, 86 flow [2023-11-26 10:44:27,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=30, PETRI_TRANSITIONS=30} [2023-11-26 10:44:27,189 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2023-11-26 10:44:27,190 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 30 transitions, 86 flow [2023-11-26 10:44:27,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:27,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:27,191 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] [2023-11-26 10:44:27,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:44:27,192 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:44:27,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:27,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1014919779, now seen corresponding path program 1 times [2023-11-26 10:44:27,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:27,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884794696] [2023-11-26 10:44:27,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:27,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:44:27,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:27,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884794696] [2023-11-26 10:44:27,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884794696] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:27,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:27,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:44:27,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10346571] [2023-11-26 10:44:27,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:27,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:27,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:27,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:27,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:27,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2023-11-26 10:44:27,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 30 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:27,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:27,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2023-11-26 10:44:27,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:27,683 INFO L124 PetriNetUnfolderBase]: 488/755 cut-off events. [2023-11-26 10:44:27,683 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2023-11-26 10:44:27,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1762 conditions, 755 events. 488/755 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2657 event pairs, 321 based on Foata normal form. 0/754 useless extension candidates. Maximal degree in co-relation 557. Up to 718 conditions per place. [2023-11-26 10:44:27,695 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 27 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-11-26 10:44:27,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 146 flow [2023-11-26 10:44:27,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:44:27,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:44:27,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2023-11-26 10:44:27,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2023-11-26 10:44:27,702 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 42 transitions. [2023-11-26 10:44:27,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 42 transitions. [2023-11-26 10:44:27,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:27,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 42 transitions. [2023-11-26 10:44:27,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:27,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 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 10:44:27,712 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 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 10:44:27,712 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 86 flow. Second operand 3 states and 42 transitions. [2023-11-26 10:44:27,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 146 flow [2023-11-26 10:44:27,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 31 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:44:27,714 INFO L231 Difference]: Finished difference. Result has 32 places, 31 transitions, 94 flow [2023-11-26 10:44:27,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=32, PETRI_TRANSITIONS=31} [2023-11-26 10:44:27,716 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-11-26 10:44:27,716 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 31 transitions, 94 flow [2023-11-26 10:44:27,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:27,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:27,717 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] [2023-11-26 10:44:27,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:44:27,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:44:27,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:27,718 INFO L85 PathProgramCache]: Analyzing trace with hash 93359912, now seen corresponding path program 1 times [2023-11-26 10:44:27,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:27,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138342467] [2023-11-26 10:44:27,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:27,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:27,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:44:27,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:27,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138342467] [2023-11-26 10:44:27,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138342467] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:27,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:27,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:44:27,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326512080] [2023-11-26 10:44:27,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:27,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:44:27,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:27,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:44:27,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:44:27,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2023-11-26 10:44:27,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:27,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:27,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2023-11-26 10:44:27,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:28,130 INFO L124 PetriNetUnfolderBase]: 601/881 cut-off events. [2023-11-26 10:44:28,130 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2023-11-26 10:44:28,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2002 conditions, 881 events. 601/881 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2850 event pairs, 186 based on Foata normal form. 0/854 useless extension candidates. Maximal degree in co-relation 1989. Up to 468 conditions per place. [2023-11-26 10:44:28,138 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 40 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2023-11-26 10:44:28,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 45 transitions, 220 flow [2023-11-26 10:44:28,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:44:28,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:44:28,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 55 transitions. [2023-11-26 10:44:28,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435483870967742 [2023-11-26 10:44:28,142 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 55 transitions. [2023-11-26 10:44:28,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 55 transitions. [2023-11-26 10:44:28,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:28,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 55 transitions. [2023-11-26 10:44:28,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:28,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:28,147 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:28,147 INFO L175 Difference]: Start difference. First operand has 32 places, 31 transitions, 94 flow. Second operand 4 states and 55 transitions. [2023-11-26 10:44:28,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 45 transitions, 220 flow [2023-11-26 10:44:28,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 45 transitions, 214 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-26 10:44:28,153 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 109 flow [2023-11-26 10:44:28,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-11-26 10:44:28,156 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-11-26 10:44:28,157 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 109 flow [2023-11-26 10:44:28,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:28,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:28,158 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] [2023-11-26 10:44:28,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:44:28,160 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:44:28,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:28,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1732050716, now seen corresponding path program 1 times [2023-11-26 10:44:28,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:28,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38363616] [2023-11-26 10:44:28,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:28,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:28,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:44:28,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:28,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38363616] [2023-11-26 10:44:28,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38363616] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:28,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566680786] [2023-11-26 10:44:28,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:28,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:28,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:28,354 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:28,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:44:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:28,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:44:28,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:44:28,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:28,652 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 10:44:28,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566680786] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:28,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:44:28,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-26 10:44:28,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520508266] [2023-11-26 10:44:28,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:28,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:44:28,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:28,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:44:28,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:44:28,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2023-11-26 10:44:28,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 109 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:28,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:28,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2023-11-26 10:44:28,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:28,900 INFO L124 PetriNetUnfolderBase]: 476/728 cut-off events. [2023-11-26 10:44:28,901 INFO L125 PetriNetUnfolderBase]: For 317/317 co-relation queries the response was YES. [2023-11-26 10:44:28,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1894 conditions, 728 events. 476/728 cut-off events. For 317/317 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2448 event pairs, 222 based on Foata normal form. 50/778 useless extension candidates. Maximal degree in co-relation 1874. Up to 513 conditions per place. [2023-11-26 10:44:28,908 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 39 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2023-11-26 10:44:28,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 47 transitions, 249 flow [2023-11-26 10:44:28,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:44:28,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:44:28,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2023-11-26 10:44:28,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2023-11-26 10:44:28,910 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 65 transitions. [2023-11-26 10:44:28,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 65 transitions. [2023-11-26 10:44:28,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:28,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 65 transitions. [2023-11-26 10:44:28,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:28,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:28,912 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:28,913 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 109 flow. Second operand 5 states and 65 transitions. [2023-11-26 10:44:28,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 47 transitions, 249 flow [2023-11-26 10:44:28,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 47 transitions, 243 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:44:28,917 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 126 flow [2023-11-26 10:44:28,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-11-26 10:44:28,918 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2023-11-26 10:44:28,918 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 126 flow [2023-11-26 10:44:28,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:28,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:28,918 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] [2023-11-26 10:44:28,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:29,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:29,125 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:44:29,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:29,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1255150857, now seen corresponding path program 1 times [2023-11-26 10:44:29,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:29,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524857242] [2023-11-26 10:44:29,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:29,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:30,568 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 10:44:30,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:30,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524857242] [2023-11-26 10:44:30,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524857242] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:30,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551258891] [2023-11-26 10:44:30,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:30,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:30,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:30,571 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:30,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca40a41d-a21f-418f-a423-ab5fb75e2e3b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:44:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:30,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-26 10:44:30,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:30,831 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 15 treesize of output 1 [2023-11-26 10:44:31,432 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 65 treesize of output 37 [2023-11-26 10:44:31,723 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 10:44:31,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:33,816 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 416 treesize of output 376 [2023-11-26 10:44:33,995 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:44:33,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 691 treesize of output 675