./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.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_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/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_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/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_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/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 e53c8de1752bcaae88365f4089aa38090949baac13984623f5e7e3707a7b4c63 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:44:17,420 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:44:17,500 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:44:17,507 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:44:17,508 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:44:17,569 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:44:17,570 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:44:17,570 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:44:17,572 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:44:17,574 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:44:17,574 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:44:17,575 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:44:17,576 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:44:17,576 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:44:17,577 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:44:17,577 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:44:17,578 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:44:17,578 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:44:17,578 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:44:17,579 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:44:17,579 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:44:17,580 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:44:17,580 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:44:17,580 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:44:17,581 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:44:17,581 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:44:17,582 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:44:17,582 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:44:17,583 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:44:17,583 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:44:17,584 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:44:17,584 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:44:17,585 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:44:17,585 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:44:17,585 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:44:17,585 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:44:17,593 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:44:17,593 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:44:17,594 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:44:17,594 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:44:17,594 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:44:17,594 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:44:17,595 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_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e53c8de1752bcaae88365f4089aa38090949baac13984623f5e7e3707a7b4c63 [2023-11-26 10:44:17,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:44:17,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:44:17,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:44:17,932 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:44:17,933 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:44:17,934 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2023-11-26 10:44:21,135 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:44:21,490 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:44:21,491 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2023-11-26 10:44:21,500 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/data/668dca541/6f5ab546723b4118bbfb45263841ab54/FLAGd29cfb541 [2023-11-26 10:44:21,516 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/data/668dca541/6f5ab546723b4118bbfb45263841ab54 [2023-11-26 10:44:21,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:44:21,521 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:44:21,522 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:44:21,523 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:44:21,529 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:44:21,530 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:44:21" (1/1) ... [2023-11-26 10:44:21,531 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66bf122d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:21, skipping insertion in model container [2023-11-26 10:44:21,531 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:44:21" (1/1) ... [2023-11-26 10:44:21,558 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:44:21,760 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_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2729,2742] [2023-11-26 10:44:21,772 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:44:21,784 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:44:21,812 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_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2729,2742] [2023-11-26 10:44:21,817 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:44:21,827 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:44:21,827 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:44:21,843 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:44:21,844 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:21 WrapperNode [2023-11-26 10:44:21,844 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:44:21,846 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:44:21,846 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:44:21,846 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:44:21,855 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:21" (1/1) ... [2023-11-26 10:44:21,883 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:21" (1/1) ... [2023-11-26 10:44:21,926 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 125 [2023-11-26 10:44:21,927 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:44:21,927 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:44:21,928 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:44:21,928 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:44:21,941 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:21" (1/1) ... [2023-11-26 10:44:21,942 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:21" (1/1) ... [2023-11-26 10:44:21,959 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:21" (1/1) ... [2023-11-26 10:44:21,993 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 6, 2, 2, 2]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 6 writes are split as follows [0, 3, 1, 1, 1]. [2023-11-26 10:44:21,994 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:21" (1/1) ... [2023-11-26 10:44:21,994 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:21" (1/1) ... [2023-11-26 10:44:22,019 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:21" (1/1) ... [2023-11-26 10:44:22,024 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:21" (1/1) ... [2023-11-26 10:44:22,026 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:21" (1/1) ... [2023-11-26 10:44:22,028 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:21" (1/1) ... [2023-11-26 10:44:22,040 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:44:22,041 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:44:22,042 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:44:22,042 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:44:22,043 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:21" (1/1) ... [2023-11-26 10:44:22,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:44:22,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:22,083 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:44:22,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:44:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:44:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:44:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:44:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:44:22,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:44:22,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 10:44:22,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 10:44:22,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:44:22,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:44:22,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:44:22,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 10:44:22,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 10:44:22,134 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 10:44:22,134 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 10:44:22,134 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 10:44:22,135 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 10:44:22,135 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-26 10:44:22,135 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-26 10:44:22,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:44:22,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:44:22,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:44:22,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:44:22,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 10:44:22,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 10:44:22,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 10:44:22,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 10:44:22,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:44:22,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:44:22,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:44:22,141 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 10:44:22,348 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:44:22,354 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:44:22,799 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:44:23,234 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:44:23,234 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-26 10:44:23,235 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:44:23 BoogieIcfgContainer [2023-11-26 10:44:23,235 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:44:23,237 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:44:23,237 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:44:23,241 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:44:23,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:44:21" (1/3) ... [2023-11-26 10:44:23,243 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1492c209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:44:23, skipping insertion in model container [2023-11-26 10:44:23,243 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:21" (2/3) ... [2023-11-26 10:44:23,243 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1492c209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:44:23, skipping insertion in model container [2023-11-26 10:44:23,244 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:44:23" (3/3) ... [2023-11-26 10:44:23,245 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2023-11-26 10:44:23,256 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 10:44:23,269 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:44:23,269 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:44:23,269 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:44:23,329 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-26 10:44:23,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 40 transitions, 101 flow [2023-11-26 10:44:23,403 INFO L124 PetriNetUnfolderBase]: 6/37 cut-off events. [2023-11-26 10:44:23,403 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 10:44:23,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 37 events. 6/37 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2023-11-26 10:44:23,407 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 40 transitions, 101 flow [2023-11-26 10:44:23,411 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 36 transitions, 90 flow [2023-11-26 10:44:23,422 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:44:23,429 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;@398296bb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:44:23,430 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-26 10:44:23,446 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:44:23,446 INFO L124 PetriNetUnfolderBase]: 6/35 cut-off events. [2023-11-26 10:44:23,446 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 10:44:23,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:23,447 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 10:44:23,448 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 10:44:23,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:23,455 INFO L85 PathProgramCache]: Analyzing trace with hash 841008197, now seen corresponding path program 1 times [2023-11-26 10:44:23,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:23,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661255323] [2023-11-26 10:44:23,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:23,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:24,794 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 10:44:24,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:24,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661255323] [2023-11-26 10:44:24,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661255323] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:24,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:24,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:44:24,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327306109] [2023-11-26 10:44:24,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:24,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:44:24,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:24,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:44:24,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:44:24,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2023-11-26 10:44:24,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 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 10:44:24,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:24,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2023-11-26 10:44:24,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:25,357 INFO L124 PetriNetUnfolderBase]: 725/1163 cut-off events. [2023-11-26 10:44:25,358 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2023-11-26 10:44:25,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2282 conditions, 1163 events. 725/1163 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5051 event pairs, 382 based on Foata normal form. 1/1004 useless extension candidates. Maximal degree in co-relation 996. Up to 651 conditions per place. [2023-11-26 10:44:25,382 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 47 selfloop transitions, 5 changer transitions 1/61 dead transitions. [2023-11-26 10:44:25,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 61 transitions, 264 flow [2023-11-26 10:44:25,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:44:25,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:44:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2023-11-26 10:44:25,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2023-11-26 10:44:25,399 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 98 transitions. [2023-11-26 10:44:25,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 98 transitions. [2023-11-26 10:44:25,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:25,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 98 transitions. [2023-11-26 10:44:25,407 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 10:44:25,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 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 10:44:25,415 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 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 10:44:25,418 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 90 flow. Second operand 4 states and 98 transitions. [2023-11-26 10:44:25,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 61 transitions, 264 flow [2023-11-26 10:44:25,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 61 transitions, 240 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-26 10:44:25,435 INFO L231 Difference]: Finished difference. Result has 39 places, 40 transitions, 112 flow [2023-11-26 10:44:25,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=39, PETRI_TRANSITIONS=40} [2023-11-26 10:44:25,443 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2023-11-26 10:44:25,444 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 40 transitions, 112 flow [2023-11-26 10:44:25,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 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 10:44:25,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:25,445 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 10:44:25,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:44:25,445 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 10:44:25,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:25,446 INFO L85 PathProgramCache]: Analyzing trace with hash 634747928, now seen corresponding path program 1 times [2023-11-26 10:44:25,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:25,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244451887] [2023-11-26 10:44:25,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:25,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:25,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:25,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:25,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244451887] [2023-11-26 10:44:25,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244451887] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:25,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530505047] [2023-11-26 10:44:25,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:25,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:25,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:25,612 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:25,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:44:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:25,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:44:25,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:25,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:25,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:25,884 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 10:44:25,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530505047] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:25,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:44:25,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-26 10:44:25,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164974818] [2023-11-26 10:44:25,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:25,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:44:25,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:25,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:44:25,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:44:25,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2023-11-26 10:44:25,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 40 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 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 10:44:25,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:25,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2023-11-26 10:44:25,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:26,399 INFO L124 PetriNetUnfolderBase]: 1400/2265 cut-off events. [2023-11-26 10:44:26,400 INFO L125 PetriNetUnfolderBase]: For 308/308 co-relation queries the response was YES. [2023-11-26 10:44:26,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4714 conditions, 2265 events. 1400/2265 cut-off events. For 308/308 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11669 event pairs, 942 based on Foata normal form. 0/2111 useless extension candidates. Maximal degree in co-relation 4424. Up to 1007 conditions per place. [2023-11-26 10:44:26,424 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 54 selfloop transitions, 6 changer transitions 0/68 dead transitions. [2023-11-26 10:44:26,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 68 transitions, 306 flow [2023-11-26 10:44:26,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:44:26,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:44:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2023-11-26 10:44:26,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2023-11-26 10:44:26,430 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 112 transitions. [2023-11-26 10:44:26,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 112 transitions. [2023-11-26 10:44:26,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:26,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 112 transitions. [2023-11-26 10:44:26,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 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 10:44:26,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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 10:44:26,434 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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 10:44:26,434 INFO L175 Difference]: Start difference. First operand has 39 places, 40 transitions, 112 flow. Second operand 5 states and 112 transitions. [2023-11-26 10:44:26,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 68 transitions, 306 flow [2023-11-26 10:44:26,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 68 transitions, 298 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 10:44:26,438 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 136 flow [2023-11-26 10:44:26,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-11-26 10:44:26,439 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2023-11-26 10:44:26,440 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 136 flow [2023-11-26 10:44:26,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 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 10:44:26,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:26,441 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 10:44:26,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:26,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:26,647 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 10:44:26,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:26,648 INFO L85 PathProgramCache]: Analyzing trace with hash 130403727, now seen corresponding path program 1 times [2023-11-26 10:44:26,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:26,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945954692] [2023-11-26 10:44:26,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:26,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:26,862 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 10:44:26,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:26,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945954692] [2023-11-26 10:44:26,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945954692] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:26,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:26,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:44:26,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522897605] [2023-11-26 10:44:26,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:26,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:44:26,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:26,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:44:26,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:44:26,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2023-11-26 10:44:26,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 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 10:44:26,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:26,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2023-11-26 10:44:26,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:27,314 INFO L124 PetriNetUnfolderBase]: 1416/2410 cut-off events. [2023-11-26 10:44:27,315 INFO L125 PetriNetUnfolderBase]: For 249/249 co-relation queries the response was YES. [2023-11-26 10:44:27,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4698 conditions, 2410 events. 1416/2410 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13393 event pairs, 808 based on Foata normal form. 116/2378 useless extension candidates. Maximal degree in co-relation 3323. Up to 1016 conditions per place. [2023-11-26 10:44:27,339 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 63 selfloop transitions, 9 changer transitions 0/80 dead transitions. [2023-11-26 10:44:27,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 80 transitions, 374 flow [2023-11-26 10:44:27,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:44:27,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:44:27,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2023-11-26 10:44:27,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2023-11-26 10:44:27,344 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 137 transitions. [2023-11-26 10:44:27,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 137 transitions. [2023-11-26 10:44:27,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:27,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 137 transitions. [2023-11-26 10:44:27,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 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 10:44:27,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 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 10:44:27,351 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 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 10:44:27,351 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 136 flow. Second operand 6 states and 137 transitions. [2023-11-26 10:44:27,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 80 transitions, 374 flow [2023-11-26 10:44:27,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 80 transitions, 370 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 10:44:27,357 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 162 flow [2023-11-26 10:44:27,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=162, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2023-11-26 10:44:27,360 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 10 predicate places. [2023-11-26 10:44:27,360 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 162 flow [2023-11-26 10:44:27,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 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 10:44:27,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:27,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:27,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:44:27,361 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 10:44:27,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:27,362 INFO L85 PathProgramCache]: Analyzing trace with hash 954911720, now seen corresponding path program 1 times [2023-11-26 10:44:27,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:27,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491960713] [2023-11-26 10:44:27,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:27,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:27,552 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 10:44:27,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:27,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491960713] [2023-11-26 10:44:27,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491960713] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:27,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931470114] [2023-11-26 10:44:27,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:27,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:27,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:27,557 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:27,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:44:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:27,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:44:27,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:27,751 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 10:44:27,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:27,794 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 10:44:27,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931470114] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:27,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:44:27,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-26 10:44:27,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058354140] [2023-11-26 10:44:27,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:27,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:44:27,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:27,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:44:27,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:44:27,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2023-11-26 10:44:27,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 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 10:44:27,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:27,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2023-11-26 10:44:27,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:28,230 INFO L124 PetriNetUnfolderBase]: 1268/2156 cut-off events. [2023-11-26 10:44:28,230 INFO L125 PetriNetUnfolderBase]: For 953/953 co-relation queries the response was YES. [2023-11-26 10:44:28,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4801 conditions, 2156 events. 1268/2156 cut-off events. For 953/953 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11677 event pairs, 722 based on Foata normal form. 108/2128 useless extension candidates. Maximal degree in co-relation 2855. Up to 729 conditions per place. [2023-11-26 10:44:28,249 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 64 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2023-11-26 10:44:28,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 81 transitions, 408 flow [2023-11-26 10:44:28,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:44:28,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:44:28,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2023-11-26 10:44:28,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2023-11-26 10:44:28,253 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 124 transitions. [2023-11-26 10:44:28,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 124 transitions. [2023-11-26 10:44:28,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:28,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 124 transitions. [2023-11-26 10:44:28,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 24.8) internal successors, (124), 5 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 10:44:28,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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 10:44:28,257 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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 10:44:28,257 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 162 flow. Second operand 5 states and 124 transitions. [2023-11-26 10:44:28,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 81 transitions, 408 flow [2023-11-26 10:44:28,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 81 transitions, 397 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-26 10:44:28,264 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 175 flow [2023-11-26 10:44:28,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2023-11-26 10:44:28,266 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 14 predicate places. [2023-11-26 10:44:28,267 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 175 flow [2023-11-26 10:44:28,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 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 10:44:28,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:28,267 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 10:44:28,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:28,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:28,474 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 10:44:28,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:28,474 INFO L85 PathProgramCache]: Analyzing trace with hash 2064537860, now seen corresponding path program 1 times [2023-11-26 10:44:28,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:28,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702010239] [2023-11-26 10:44:28,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:28,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:44:28,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:28,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702010239] [2023-11-26 10:44:28,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702010239] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:28,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827214655] [2023-11-26 10:44:28,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:28,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:28,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:28,658 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:28,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:44:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:28,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:44:28,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:44:28,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:44:28,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827214655] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:28,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:44:28,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-26 10:44:28,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716602605] [2023-11-26 10:44:28,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:28,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:44:28,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:28,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:44:28,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:44:28,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2023-11-26 10:44:28,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 175 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 10:44:28,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:28,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2023-11-26 10:44:28,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:29,438 INFO L124 PetriNetUnfolderBase]: 1425/2349 cut-off events. [2023-11-26 10:44:29,438 INFO L125 PetriNetUnfolderBase]: For 2795/2795 co-relation queries the response was YES. [2023-11-26 10:44:29,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5863 conditions, 2349 events. 1425/2349 cut-off events. For 2795/2795 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12252 event pairs, 562 based on Foata normal form. 0/2130 useless extension candidates. Maximal degree in co-relation 3332. Up to 602 conditions per place. [2023-11-26 10:44:29,467 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 76 selfloop transitions, 8 changer transitions 0/91 dead transitions. [2023-11-26 10:44:29,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 91 transitions, 493 flow [2023-11-26 10:44:29,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:44:29,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:44:29,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2023-11-26 10:44:29,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-26 10:44:29,469 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 140 transitions. [2023-11-26 10:44:29,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 140 transitions. [2023-11-26 10:44:29,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:29,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 140 transitions. [2023-11-26 10:44:29,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 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 10:44:29,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 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 10:44:29,474 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 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 10:44:29,474 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 175 flow. Second operand 6 states and 140 transitions. [2023-11-26 10:44:29,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 91 transitions, 493 flow [2023-11-26 10:44:29,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 91 transitions, 454 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-11-26 10:44:29,482 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 187 flow [2023-11-26 10:44:29,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=187, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-11-26 10:44:29,485 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 16 predicate places. [2023-11-26 10:44:29,485 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 187 flow [2023-11-26 10:44:29,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 10:44:29,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:29,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:29,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:29,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:29,698 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:44:29,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:29,701 INFO L85 PathProgramCache]: Analyzing trace with hash -43812854, now seen corresponding path program 1 times [2023-11-26 10:44:29,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:29,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559089799] [2023-11-26 10:44:29,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:29,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:29,866 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 10:44:29,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:29,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559089799] [2023-11-26 10:44:29,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559089799] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:29,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:29,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:44:29,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151482853] [2023-11-26 10:44:29,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:29,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:44:29,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:29,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:44:29,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:44:29,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2023-11-26 10:44:29,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 187 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 10:44:29,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:29,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2023-11-26 10:44:29,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:30,227 INFO L124 PetriNetUnfolderBase]: 926/1507 cut-off events. [2023-11-26 10:44:30,227 INFO L125 PetriNetUnfolderBase]: For 1493/1493 co-relation queries the response was YES. [2023-11-26 10:44:30,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3992 conditions, 1507 events. 926/1507 cut-off events. For 1493/1493 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6913 event pairs, 620 based on Foata normal form. 0/1397 useless extension candidates. Maximal degree in co-relation 3029. Up to 985 conditions per place. [2023-11-26 10:44:30,243 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 28 selfloop transitions, 4 changer transitions 33/73 dead transitions. [2023-11-26 10:44:30,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 73 transitions, 385 flow [2023-11-26 10:44:30,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:44:30,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:44:30,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2023-11-26 10:44:30,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2023-11-26 10:44:30,245 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 124 transitions. [2023-11-26 10:44:30,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 124 transitions. [2023-11-26 10:44:30,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:30,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 124 transitions. [2023-11-26 10:44:30,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 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 10:44:30,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 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 10:44:30,248 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 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 10:44:30,248 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 187 flow. Second operand 6 states and 124 transitions. [2023-11-26 10:44:30,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 73 transitions, 385 flow [2023-11-26 10:44:30,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 73 transitions, 382 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:44:30,253 INFO L231 Difference]: Finished difference. Result has 62 places, 40 transitions, 157 flow [2023-11-26 10:44:30,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=157, PETRI_PLACES=62, PETRI_TRANSITIONS=40} [2023-11-26 10:44:30,257 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 22 predicate places. [2023-11-26 10:44:30,257 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 40 transitions, 157 flow [2023-11-26 10:44:30,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 10:44:30,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:30,258 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] [2023-11-26 10:44:30,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 10:44:30,258 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:44:30,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:30,259 INFO L85 PathProgramCache]: Analyzing trace with hash 690897977, now seen corresponding path program 1 times [2023-11-26 10:44:30,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:30,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013779840] [2023-11-26 10:44:30,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:30,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:30,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:44:30,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:30,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013779840] [2023-11-26 10:44:30,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013779840] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:30,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284105736] [2023-11-26 10:44:30,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:30,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:30,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:30,428 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:30,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:44:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:30,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:44:30,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:44:30,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:30,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:44:30,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284105736] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:30,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:44:30,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-26 10:44:30,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326850227] [2023-11-26 10:44:30,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:30,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:44:30,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:30,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:44:30,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:44:30,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2023-11-26 10:44:30,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 40 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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 10:44:30,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:30,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2023-11-26 10:44:30,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:31,015 INFO L124 PetriNetUnfolderBase]: 815/1371 cut-off events. [2023-11-26 10:44:31,016 INFO L125 PetriNetUnfolderBase]: For 1504/1504 co-relation queries the response was YES. [2023-11-26 10:44:31,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3697 conditions, 1371 events. 815/1371 cut-off events. For 1504/1504 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 6585 event pairs, 323 based on Foata normal form. 52/1323 useless extension candidates. Maximal degree in co-relation 3664. Up to 577 conditions per place. [2023-11-26 10:44:31,031 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 41 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2023-11-26 10:44:31,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 307 flow [2023-11-26 10:44:31,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:44:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:44:31,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2023-11-26 10:44:31,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2023-11-26 10:44:31,033 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 94 transitions. [2023-11-26 10:44:31,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 94 transitions. [2023-11-26 10:44:31,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:31,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 94 transitions. [2023-11-26 10:44:31,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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 10:44:31,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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 10:44:31,035 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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 10:44:31,035 INFO L175 Difference]: Start difference. First operand has 62 places, 40 transitions, 157 flow. Second operand 5 states and 94 transitions. [2023-11-26 10:44:31,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 307 flow [2023-11-26 10:44:31,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 54 transitions, 267 flow, removed 9 selfloop flow, removed 9 redundant places. [2023-11-26 10:44:31,040 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 150 flow [2023-11-26 10:44:31,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=150, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-11-26 10:44:31,041 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 11 predicate places. [2023-11-26 10:44:31,041 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 150 flow [2023-11-26 10:44:31,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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 10:44:31,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:31,041 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, 1, 1] [2023-11-26 10:44:31,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:31,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 10:44:31,247 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:44:31,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:31,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1816840522, now seen corresponding path program 1 times [2023-11-26 10:44:31,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:31,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780254104] [2023-11-26 10:44:31,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:31,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 10:44:31,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:31,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780254104] [2023-11-26 10:44:31,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780254104] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:31,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:31,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:44:31,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065532909] [2023-11-26 10:44:31,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:31,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:44:31,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:31,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:44:31,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:44:31,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2023-11-26 10:44:31,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 150 flow. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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 10:44:31,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:31,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2023-11-26 10:44:31,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:32,124 INFO L124 PetriNetUnfolderBase]: 1621/2607 cut-off events. [2023-11-26 10:44:32,124 INFO L125 PetriNetUnfolderBase]: For 1543/1543 co-relation queries the response was YES. [2023-11-26 10:44:32,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6743 conditions, 2607 events. 1621/2607 cut-off events. For 1543/1543 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 12069 event pairs, 285 based on Foata normal form. 114/2717 useless extension candidates. Maximal degree in co-relation 6717. Up to 1331 conditions per place. [2023-11-26 10:44:32,151 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 101 selfloop transitions, 17 changer transitions 9/133 dead transitions. [2023-11-26 10:44:32,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 133 transitions, 705 flow [2023-11-26 10:44:32,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:44:32,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:44:32,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2023-11-26 10:44:32,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2023-11-26 10:44:32,153 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 183 transitions. [2023-11-26 10:44:32,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 183 transitions. [2023-11-26 10:44:32,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:32,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 183 transitions. [2023-11-26 10:44:32,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 20.333333333333332) internal successors, (183), 9 states have internal predecessors, (183), 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 10:44:32,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 40.0) internal successors, (400), 10 states have internal predecessors, (400), 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 10:44:32,156 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 40.0) internal successors, (400), 10 states have internal predecessors, (400), 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 10:44:32,156 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 150 flow. Second operand 9 states and 183 transitions. [2023-11-26 10:44:32,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 133 transitions, 705 flow [2023-11-26 10:44:32,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 133 transitions, 697 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 10:44:32,165 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 278 flow [2023-11-26 10:44:32,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=278, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2023-11-26 10:44:32,167 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 21 predicate places. [2023-11-26 10:44:32,168 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 278 flow [2023-11-26 10:44:32,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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 10:44:32,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:32,168 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, 1, 1] [2023-11-26 10:44:32,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 10:44:32,169 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 10:44:32,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:32,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1365133991, now seen corresponding path program 2 times [2023-11-26 10:44:32,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:32,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192188679] [2023-11-26 10:44:32,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:32,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:32,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 10:44:32,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:32,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192188679] [2023-11-26 10:44:32,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192188679] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:32,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936649601] [2023-11-26 10:44:32,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:44:32,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:32,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:32,369 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:32,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:44:32,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:44:32,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:44:32,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:44:32,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 10:44:32,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 10:44:32,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936649601] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:32,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:44:32,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-26 10:44:32,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627199921] [2023-11-26 10:44:32,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:32,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:44:32,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:32,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:44:32,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:44:32,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2023-11-26 10:44:32,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 278 flow. Second operand has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 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 10:44:32,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:32,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2023-11-26 10:44:32,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:33,421 INFO L124 PetriNetUnfolderBase]: 1687/2999 cut-off events. [2023-11-26 10:44:33,421 INFO L125 PetriNetUnfolderBase]: For 4290/4351 co-relation queries the response was YES. [2023-11-26 10:44:33,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8947 conditions, 2999 events. 1687/2999 cut-off events. For 4290/4351 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 15784 event pairs, 978 based on Foata normal form. 36/2986 useless extension candidates. Maximal degree in co-relation 6757. Up to 1709 conditions per place. [2023-11-26 10:44:33,451 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 37 selfloop transitions, 6 changer transitions 51/110 dead transitions. [2023-11-26 10:44:33,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 110 transitions, 692 flow [2023-11-26 10:44:33,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:44:33,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 10:44:33,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2023-11-26 10:44:33,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2023-11-26 10:44:33,454 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 178 transitions. [2023-11-26 10:44:33,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 178 transitions. [2023-11-26 10:44:33,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:33,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 178 transitions. [2023-11-26 10:44:33,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 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 10:44:33,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 40.0) internal successors, (440), 11 states have internal predecessors, (440), 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 10:44:33,457 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 40.0) internal successors, (440), 11 states have internal predecessors, (440), 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 10:44:33,457 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 278 flow. Second operand 10 states and 178 transitions. [2023-11-26 10:44:33,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 110 transitions, 692 flow [2023-11-26 10:44:33,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 110 transitions, 692 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 10:44:33,479 INFO L231 Difference]: Finished difference. Result has 76 places, 59 transitions, 330 flow [2023-11-26 10:44:33,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=330, PETRI_PLACES=76, PETRI_TRANSITIONS=59} [2023-11-26 10:44:33,480 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 36 predicate places. [2023-11-26 10:44:33,480 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 59 transitions, 330 flow [2023-11-26 10:44:33,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 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 10:44:33,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:33,481 INFO L208 CegarLoopForPetriNet]: trace histogram [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, 1] [2023-11-26 10:44:33,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-26 10:44:33,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-26 10:44:33,688 INFO L420 AbstractCegarLoop]: === Iteration 10 === 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 10:44:33,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:33,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1487758162, now seen corresponding path program 3 times [2023-11-26 10:44:33,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:33,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301493363] [2023-11-26 10:44:33,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:33,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 10:44:33,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:33,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301493363] [2023-11-26 10:44:33,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301493363] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:33,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793971284] [2023-11-26 10:44:33,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:44:33,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:33,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:33,888 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:33,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:44:34,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 10:44:34,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:44:34,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:44:34,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 10:44:34,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 10:44:34,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793971284] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:34,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:44:34,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-26 10:44:34,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298584470] [2023-11-26 10:44:34,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:34,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:44:34,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:34,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:44:34,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:44:34,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2023-11-26 10:44:34,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 59 transitions, 330 flow. Second operand has 14 states, 14 states have (on average 14.071428571428571) internal successors, (197), 14 states have internal predecessors, (197), 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 10:44:34,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:34,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2023-11-26 10:44:34,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:34,996 INFO L124 PetriNetUnfolderBase]: 1255/2200 cut-off events. [2023-11-26 10:44:34,997 INFO L125 PetriNetUnfolderBase]: For 3452/3562 co-relation queries the response was YES. [2023-11-26 10:44:35,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6964 conditions, 2200 events. 1255/2200 cut-off events. For 3452/3562 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 11538 event pairs, 435 based on Foata normal form. 102/2235 useless extension candidates. Maximal degree in co-relation 6917. Up to 1105 conditions per place. [2023-11-26 10:44:35,038 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 75 selfloop transitions, 9 changer transitions 0/102 dead transitions. [2023-11-26 10:44:35,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 102 transitions, 768 flow [2023-11-26 10:44:35,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:44:35,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:44:35,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2023-11-26 10:44:35,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2023-11-26 10:44:35,040 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 159 transitions. [2023-11-26 10:44:35,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 159 transitions. [2023-11-26 10:44:35,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:35,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 159 transitions. [2023-11-26 10:44:35,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 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 10:44:35,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 40.0) internal successors, (400), 10 states have internal predecessors, (400), 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 10:44:35,044 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 40.0) internal successors, (400), 10 states have internal predecessors, (400), 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 10:44:35,044 INFO L175 Difference]: Start difference. First operand has 76 places, 59 transitions, 330 flow. Second operand 9 states and 159 transitions. [2023-11-26 10:44:35,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 102 transitions, 768 flow [2023-11-26 10:44:35,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 102 transitions, 710 flow, removed 27 selfloop flow, removed 6 redundant places. [2023-11-26 10:44:35,056 INFO L231 Difference]: Finished difference. Result has 73 places, 60 transitions, 330 flow [2023-11-26 10:44:35,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=330, PETRI_PLACES=73, PETRI_TRANSITIONS=60} [2023-11-26 10:44:35,058 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 33 predicate places. [2023-11-26 10:44:35,058 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 60 transitions, 330 flow [2023-11-26 10:44:35,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.071428571428571) internal successors, (197), 14 states have internal predecessors, (197), 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 10:44:35,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:35,059 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 10:44:35,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:35,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 10:44:35,266 INFO L420 AbstractCegarLoop]: === Iteration 11 === 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 10:44:35,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:35,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1382639054, now seen corresponding path program 4 times [2023-11-26 10:44:35,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:35,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868451030] [2023-11-26 10:44:35,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:35,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:44:35,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:35,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868451030] [2023-11-26 10:44:35,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868451030] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:35,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066937857] [2023-11-26 10:44:35,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:44:35,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:35,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:35,484 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:35,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:44:35,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:44:35,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:44:35,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:44:35,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:44:35,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:35,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:44:35,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066937857] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:35,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:44:35,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-11-26 10:44:35,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670067746] [2023-11-26 10:44:35,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:35,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 10:44:35,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:35,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 10:44:35,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:44:35,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2023-11-26 10:44:35,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 60 transitions, 330 flow. Second operand has 12 states, 12 states have (on average 14.583333333333334) internal successors, (175), 12 states have internal predecessors, (175), 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 10:44:35,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:35,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2023-11-26 10:44:35,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:37,046 INFO L124 PetriNetUnfolderBase]: 2833/4886 cut-off events. [2023-11-26 10:44:37,046 INFO L125 PetriNetUnfolderBase]: For 8887/8947 co-relation queries the response was YES. [2023-11-26 10:44:37,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15802 conditions, 4886 events. 2833/4886 cut-off events. For 8887/8947 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 26388 event pairs, 218 based on Foata normal form. 98/4925 useless extension candidates. Maximal degree in co-relation 15757. Up to 770 conditions per place. [2023-11-26 10:44:37,107 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 136 selfloop transitions, 29 changer transitions 0/179 dead transitions. [2023-11-26 10:44:37,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 179 transitions, 1238 flow [2023-11-26 10:44:37,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 10:44:37,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-26 10:44:37,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 283 transitions. [2023-11-26 10:44:37,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421875 [2023-11-26 10:44:37,110 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 283 transitions. [2023-11-26 10:44:37,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 283 transitions. [2023-11-26 10:44:37,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:37,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 283 transitions. [2023-11-26 10:44:37,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 17.6875) internal successors, (283), 16 states have internal predecessors, (283), 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 10:44:37,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 40.0) internal successors, (680), 17 states have internal predecessors, (680), 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 10:44:37,115 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 40.0) internal successors, (680), 17 states have internal predecessors, (680), 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 10:44:37,115 INFO L175 Difference]: Start difference. First operand has 73 places, 60 transitions, 330 flow. Second operand 16 states and 283 transitions. [2023-11-26 10:44:37,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 179 transitions, 1238 flow [2023-11-26 10:44:37,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 179 transitions, 1146 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-11-26 10:44:37,135 INFO L231 Difference]: Finished difference. Result has 86 places, 72 transitions, 460 flow [2023-11-26 10:44:37,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=460, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2023-11-26 10:44:37,136 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 46 predicate places. [2023-11-26 10:44:37,136 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 460 flow [2023-11-26 10:44:37,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.583333333333334) internal successors, (175), 12 states have internal predecessors, (175), 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 10:44:37,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:37,138 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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] [2023-11-26 10:44:37,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:37,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:37,346 INFO L420 AbstractCegarLoop]: === Iteration 12 === 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 10:44:37,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:37,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1665473225, now seen corresponding path program 5 times [2023-11-26 10:44:37,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:37,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068269266] [2023-11-26 10:44:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:37,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:44:37,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:37,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068269266] [2023-11-26 10:44:37,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068269266] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:37,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969434270] [2023-11-26 10:44:37,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 10:44:37,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:37,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:37,715 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:37,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:44:37,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-26 10:44:37,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:44:37,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:44:37,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:44:38,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:44:38,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969434270] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:38,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:44:38,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-26 10:44:38,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779703509] [2023-11-26 10:44:38,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:38,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 10:44:38,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:38,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 10:44:38,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-11-26 10:44:38,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2023-11-26 10:44:38,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 460 flow. Second operand has 17 states, 17 states have (on average 9.882352941176471) internal successors, (168), 17 states have internal predecessors, (168), 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 10:44:38,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:38,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2023-11-26 10:44:38,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:42,582 INFO L124 PetriNetUnfolderBase]: 11211/16713 cut-off events. [2023-11-26 10:44:42,582 INFO L125 PetriNetUnfolderBase]: For 29476/29536 co-relation queries the response was YES. [2023-11-26 10:44:42,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56390 conditions, 16713 events. 11211/16713 cut-off events. For 29476/29536 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 90843 event pairs, 2031 based on Foata normal form. 360/17068 useless extension candidates. Maximal degree in co-relation 56341. Up to 4505 conditions per place. [2023-11-26 10:44:42,753 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 468 selfloop transitions, 108 changer transitions 58/641 dead transitions. [2023-11-26 10:44:42,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 641 transitions, 4365 flow [2023-11-26 10:44:42,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-26 10:44:42,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-26 10:44:42,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 764 transitions. [2023-11-26 10:44:42,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2023-11-26 10:44:42,761 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 764 transitions. [2023-11-26 10:44:42,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 764 transitions. [2023-11-26 10:44:42,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:42,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 764 transitions. [2023-11-26 10:44:42,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 17.767441860465116) internal successors, (764), 43 states have internal predecessors, (764), 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 10:44:42,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 40.0) internal successors, (1760), 44 states have internal predecessors, (1760), 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 10:44:42,774 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 40.0) internal successors, (1760), 44 states have internal predecessors, (1760), 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 10:44:42,774 INFO L175 Difference]: Start difference. First operand has 86 places, 72 transitions, 460 flow. Second operand 43 states and 764 transitions. [2023-11-26 10:44:42,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 641 transitions, 4365 flow [2023-11-26 10:44:42,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 641 transitions, 4337 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-26 10:44:42,954 INFO L231 Difference]: Finished difference. Result has 148 places, 189 transitions, 1642 flow [2023-11-26 10:44:42,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=1642, PETRI_PLACES=148, PETRI_TRANSITIONS=189} [2023-11-26 10:44:42,956 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 108 predicate places. [2023-11-26 10:44:42,956 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 189 transitions, 1642 flow [2023-11-26 10:44:42,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.882352941176471) internal successors, (168), 17 states have internal predecessors, (168), 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 10:44:42,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:42,957 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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] [2023-11-26 10:44:42,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:43,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:43,164 INFO L420 AbstractCegarLoop]: === Iteration 13 === 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 10:44:43,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:43,165 INFO L85 PathProgramCache]: Analyzing trace with hash 48774543, now seen corresponding path program 6 times [2023-11-26 10:44:43,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:43,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693980150] [2023-11-26 10:44:43,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:43,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:43,500 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 10:44:43,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:43,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693980150] [2023-11-26 10:44:43,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693980150] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:43,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215822410] [2023-11-26 10:44:43,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 10:44:43,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:43,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:43,503 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:43,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:44:43,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-26 10:44:43,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:44:43,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:44:43,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 10:44:43,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 10:44:44,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215822410] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:44,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:44:44,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-26 10:44:44,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229183011] [2023-11-26 10:44:44,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:44,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 10:44:44,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:44,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 10:44:44,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:44:44,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2023-11-26 10:44:44,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 189 transitions, 1642 flow. Second operand has 15 states, 15 states have (on average 10.2) internal successors, (153), 15 states have internal predecessors, (153), 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 10:44:44,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:44,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2023-11-26 10:44:44,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:50,607 INFO L124 PetriNetUnfolderBase]: 18160/27075 cut-off events. [2023-11-26 10:44:50,607 INFO L125 PetriNetUnfolderBase]: For 166285/166393 co-relation queries the response was YES. [2023-11-26 10:44:50,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119576 conditions, 27075 events. 18160/27075 cut-off events. For 166285/166393 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 157026 event pairs, 3005 based on Foata normal form. 298/27361 useless extension candidates. Maximal degree in co-relation 119505. Up to 7751 conditions per place. [2023-11-26 10:44:51,164 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 560 selfloop transitions, 196 changer transitions 22/785 dead transitions. [2023-11-26 10:44:51,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 785 transitions, 6968 flow [2023-11-26 10:44:51,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-26 10:44:51,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-26 10:44:51,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 756 transitions. [2023-11-26 10:44:51,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2023-11-26 10:44:51,168 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 756 transitions. [2023-11-26 10:44:51,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 756 transitions. [2023-11-26 10:44:51,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:51,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 756 transitions. [2023-11-26 10:44:51,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 18.0) internal successors, (756), 42 states have internal predecessors, (756), 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 10:44:51,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 40.0) internal successors, (1720), 43 states have internal predecessors, (1720), 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 10:44:51,176 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 40.0) internal successors, (1720), 43 states have internal predecessors, (1720), 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 10:44:51,176 INFO L175 Difference]: Start difference. First operand has 148 places, 189 transitions, 1642 flow. Second operand 42 states and 756 transitions. [2023-11-26 10:44:51,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 785 transitions, 6968 flow [2023-11-26 10:44:52,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 785 transitions, 6596 flow, removed 186 selfloop flow, removed 1 redundant places. [2023-11-26 10:44:52,311 INFO L231 Difference]: Finished difference. Result has 210 places, 305 transitions, 3183 flow [2023-11-26 10:44:52,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1456, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=3183, PETRI_PLACES=210, PETRI_TRANSITIONS=305} [2023-11-26 10:44:52,312 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 170 predicate places. [2023-11-26 10:44:52,312 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 305 transitions, 3183 flow [2023-11-26 10:44:52,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.2) internal successors, (153), 15 states have internal predecessors, (153), 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 10:44:52,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:52,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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] [2023-11-26 10:44:52,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-26 10:44:52,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 10:44:52,526 INFO L420 AbstractCegarLoop]: === Iteration 14 === 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 10:44:52,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:52,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1366796505, now seen corresponding path program 7 times [2023-11-26 10:44:52,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:52,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809897610] [2023-11-26 10:44:52,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:52,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 10:44:52,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:52,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809897610] [2023-11-26 10:44:52,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809897610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:52,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179317173] [2023-11-26 10:44:52,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 10:44:52,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:52,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:52,894 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:52,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:44:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:53,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:44:53,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 10:44:53,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 10:44:53,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179317173] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:53,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:44:53,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-11-26 10:44:53,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595593215] [2023-11-26 10:44:53,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:53,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:44:53,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:53,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:44:53,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:44:53,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2023-11-26 10:44:53,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 305 transitions, 3183 flow. Second operand has 14 states, 14 states have (on average 10.214285714285714) internal successors, (143), 14 states have internal predecessors, (143), 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 10:44:53,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:53,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2023-11-26 10:44:53,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:00,300 INFO L124 PetriNetUnfolderBase]: 19519/29225 cut-off events. [2023-11-26 10:45:00,300 INFO L125 PetriNetUnfolderBase]: For 287598/287874 co-relation queries the response was YES. [2023-11-26 10:45:00,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145898 conditions, 29225 events. 19519/29225 cut-off events. For 287598/287874 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 173596 event pairs, 1317 based on Foata normal form. 220/29436 useless extension candidates. Maximal degree in co-relation 145803. Up to 11611 conditions per place. [2023-11-26 10:45:00,893 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 403 selfloop transitions, 202 changer transitions 20/632 dead transitions. [2023-11-26 10:45:00,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 632 transitions, 6691 flow [2023-11-26 10:45:00,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-26 10:45:00,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-26 10:45:00,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 447 transitions. [2023-11-26 10:45:00,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.447 [2023-11-26 10:45:00,899 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 447 transitions. [2023-11-26 10:45:00,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 447 transitions. [2023-11-26 10:45:00,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:00,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 447 transitions. [2023-11-26 10:45:00,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 17.88) internal successors, (447), 25 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:00,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 40.0) internal successors, (1040), 26 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:00,907 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 40.0) internal successors, (1040), 26 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:00,908 INFO L175 Difference]: Start difference. First operand has 210 places, 305 transitions, 3183 flow. Second operand 25 states and 447 transitions. [2023-11-26 10:45:00,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 632 transitions, 6691 flow [2023-11-26 10:45:03,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 632 transitions, 6389 flow, removed 110 selfloop flow, removed 16 redundant places. [2023-11-26 10:45:03,364 INFO L231 Difference]: Finished difference. Result has 230 places, 353 transitions, 4185 flow [2023-11-26 10:45:03,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4185, PETRI_PLACES=230, PETRI_TRANSITIONS=353} [2023-11-26 10:45:03,365 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 190 predicate places. [2023-11-26 10:45:03,366 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 353 transitions, 4185 flow [2023-11-26 10:45:03,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.214285714285714) internal successors, (143), 14 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:03,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:03,366 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2023-11-26 10:45:03,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:03,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 10:45:03,568 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:45:03,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:03,568 INFO L85 PathProgramCache]: Analyzing trace with hash 646922452, now seen corresponding path program 8 times [2023-11-26 10:45:03,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:03,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834691574] [2023-11-26 10:45:03,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:03,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:45:03,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:03,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834691574] [2023-11-26 10:45:03,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834691574] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:03,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734618409] [2023-11-26 10:45:03,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:45:03,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:03,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:03,785 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:03,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e74ba1a-b2b3-46cf-8bef-0e9c3843d67d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 10:45:03,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:45:03,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:45:03,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 10:45:03,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:45:04,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:04,254 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:45:04,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734618409] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:04,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:04,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-26 10:45:04,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800768202] [2023-11-26 10:45:04,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:04,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 10:45:04,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:04,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 10:45:04,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-11-26 10:45:04,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2023-11-26 10:45:04,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 353 transitions, 4185 flow. Second operand has 19 states, 19 states have (on average 13.157894736842104) internal successors, (250), 19 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:04,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:04,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2023-11-26 10:45:04,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand