./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-lamport.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_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/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_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/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_9910518f-f4f0-4628-9b69-5ed7134663f8/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 a4f33aa2cc1f38311ba2397f8e50d98656063732fb966533fd95353a255f95b1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:00:17,913 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:00:18,039 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 12:00:18,046 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:00:18,047 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:00:18,089 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:00:18,090 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:00:18,091 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:00:18,092 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:00:18,097 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:00:18,098 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:00:18,099 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:00:18,100 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:00:18,101 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:00:18,102 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:00:18,102 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:00:18,103 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:00:18,103 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:00:18,103 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:00:18,104 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:00:18,104 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:00:18,105 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:00:18,105 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:00:18,106 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:00:18,106 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:00:18,107 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:00:18,107 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:00:18,108 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:00:18,108 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:00:18,109 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:00:18,110 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:00:18,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:00:18,111 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:00:18,111 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:00:18,111 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:00:18,112 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:00:18,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:00:18,112 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:00:18,112 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:00:18,113 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:00:18,113 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:00:18,113 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:00:18,114 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_9910518f-f4f0-4628-9b69-5ed7134663f8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4f33aa2cc1f38311ba2397f8e50d98656063732fb966533fd95353a255f95b1 [2023-11-26 12:00:18,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:00:18,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:00:18,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:00:18,490 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:00:18,491 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:00:18,492 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2023-11-26 12:00:21,617 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:00:21,854 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:00:21,858 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2023-11-26 12:00:21,872 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/data/cb133b7ff/17f7f594493e41fe8f06639612c1bacf/FLAGdf322ef3c [2023-11-26 12:00:21,891 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/data/cb133b7ff/17f7f594493e41fe8f06639612c1bacf [2023-11-26 12:00:21,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:00:21,900 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:00:21,904 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:00:21,904 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:00:21,910 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:00:21,911 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:00:21" (1/1) ... [2023-11-26 12:00:21,948 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aa272c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:21, skipping insertion in model container [2023-11-26 12:00:21,949 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:00:21" (1/1) ... [2023-11-26 12:00:21,979 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:00:22,224 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_9910518f-f4f0-4628-9b69-5ed7134663f8/sv-benchmarks/c/weaver/parallel-lamport.wvr.c[4249,4262] [2023-11-26 12:00:22,238 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:00:22,250 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:00:22,280 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_9910518f-f4f0-4628-9b69-5ed7134663f8/sv-benchmarks/c/weaver/parallel-lamport.wvr.c[4249,4262] [2023-11-26 12:00:22,284 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:00:22,294 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:00:22,295 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:00:22,304 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:00:22,304 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:22 WrapperNode [2023-11-26 12:00:22,305 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:00:22,306 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:00:22,306 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:00:22,306 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:00:22,315 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:22" (1/1) ... [2023-11-26 12:00:22,325 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:22" (1/1) ... [2023-11-26 12:00:22,362 INFO L138 Inliner]: procedures = 25, calls = 89, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 246 [2023-11-26 12:00:22,363 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:00:22,364 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:00:22,364 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:00:22,364 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:00:22,377 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:22" (1/1) ... [2023-11-26 12:00:22,377 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:22" (1/1) ... [2023-11-26 12:00:22,382 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:22" (1/1) ... [2023-11-26 12:00:22,401 INFO L175 MemorySlicer]: Split 13 memory accesses to 5 slices as follows [2, 2, 2, 2, 5]. 38 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-26 12:00:22,401 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:22" (1/1) ... [2023-11-26 12:00:22,402 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:22" (1/1) ... [2023-11-26 12:00:22,418 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:22" (1/1) ... [2023-11-26 12:00:22,438 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:22" (1/1) ... [2023-11-26 12:00:22,441 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:22" (1/1) ... [2023-11-26 12:00:22,443 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:22" (1/1) ... [2023-11-26 12:00:22,447 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:00:22,449 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:00:22,449 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:00:22,449 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:00:22,450 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:22" (1/1) ... [2023-11-26 12:00:22,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:00:22,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:22,495 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:00:22,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:00:22,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:00:22,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 12:00:22,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 12:00:22,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 12:00:22,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 12:00:22,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 12:00:22,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 12:00:22,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 12:00:22,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 12:00:22,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 12:00:22,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 12:00:22,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 12:00:22,537 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 12:00:22,537 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 12:00:22,537 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 12:00:22,537 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 12:00:22,537 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-26 12:00:22,538 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-26 12:00:22,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:00:22,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 12:00:22,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 12:00:22,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 12:00:22,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 12:00:22,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 12:00:22,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 12:00:22,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 12:00:22,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:00:22,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:00:22,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 12:00:22,541 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 12:00:22,690 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:00:22,692 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:00:23,086 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:00:23,543 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:00:23,543 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 12:00:23,544 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:00:23 BoogieIcfgContainer [2023-11-26 12:00:23,544 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:00:23,547 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:00:23,547 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:00:23,550 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:00:23,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:00:21" (1/3) ... [2023-11-26 12:00:23,551 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b888840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:00:23, skipping insertion in model container [2023-11-26 12:00:23,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:22" (2/3) ... [2023-11-26 12:00:23,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b888840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:00:23, skipping insertion in model container [2023-11-26 12:00:23,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:00:23" (3/3) ... [2023-11-26 12:00:23,553 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-lamport.wvr.c [2023-11-26 12:00:23,564 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 12:00:23,575 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:00:23,575 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 12:00:23,576 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 12:00:23,630 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-26 12:00:23,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 49 transitions, 119 flow [2023-11-26 12:00:23,741 INFO L124 PetriNetUnfolderBase]: 1/46 cut-off events. [2023-11-26 12:00:23,742 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 12:00:23,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 46 events. 1/46 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2023-11-26 12:00:23,745 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 49 transitions, 119 flow [2023-11-26 12:00:23,749 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 45 transitions, 108 flow [2023-11-26 12:00:23,759 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:00:23,766 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;@544fb49e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:00:23,767 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-26 12:00:23,785 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 12:00:23,786 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2023-11-26 12:00:23,786 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 12:00:23,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:00:23,787 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:23,788 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 12:00:23,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:23,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1897879560, now seen corresponding path program 1 times [2023-11-26 12:00:23,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:23,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549831745] [2023-11-26 12:00:23,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:23,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:24,547 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 12:00:24,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:24,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549831745] [2023-11-26 12:00:24,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549831745] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:24,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:24,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:00:24,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068004677] [2023-11-26 12:00:24,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:24,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:00:24,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:24,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:00:24,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:24,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2023-11-26 12:00:24,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 12:00:24,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:00:24,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2023-11-26 12:00:24,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:00:25,001 INFO L124 PetriNetUnfolderBase]: 946/1665 cut-off events. [2023-11-26 12:00:25,002 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2023-11-26 12:00:25,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3257 conditions, 1665 events. 946/1665 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9596 event pairs, 945 based on Foata normal form. 0/1628 useless extension candidates. Maximal degree in co-relation 2847. Up to 1465 conditions per place. [2023-11-26 12:00:25,027 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 28 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-11-26 12:00:25,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 46 transitions, 170 flow [2023-11-26 12:00:25,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:00:25,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:00:25,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-26 12:00:25,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2023-11-26 12:00:25,044 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-26 12:00:25,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-26 12:00:25,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:00:25,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-26 12:00:25,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:25,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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 12:00:25,061 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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 12:00:25,063 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 108 flow. Second operand 3 states and 88 transitions. [2023-11-26 12:00:25,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 46 transitions, 170 flow [2023-11-26 12:00:25,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 158 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-26 12:00:25,081 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 108 flow [2023-11-26 12:00:25,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-11-26 12:00:25,088 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -3 predicate places. [2023-11-26 12:00:25,088 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 108 flow [2023-11-26 12:00:25,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 12:00:25,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:00:25,089 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:25,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 12:00:25,091 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 12:00:25,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:25,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1408818239, now seen corresponding path program 1 times [2023-11-26 12:00:25,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:25,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255105159] [2023-11-26 12:00:25,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:25,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:25,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:00:25,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:25,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255105159] [2023-11-26 12:00:25,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255105159] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:25,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:25,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 12:00:25,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288918965] [2023-11-26 12:00:25,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:25,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:00:25,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:25,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:00:25,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:00:25,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-26 12:00:25,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 108 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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 12:00:25,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:00:25,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-26 12:00:25,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:00:26,528 INFO L124 PetriNetUnfolderBase]: 3950/6503 cut-off events. [2023-11-26 12:00:26,528 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-11-26 12:00:26,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12653 conditions, 6503 events. 3950/6503 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 40753 event pairs, 737 based on Foata normal form. 60/6545 useless extension candidates. Maximal degree in co-relation 12642. Up to 1730 conditions per place. [2023-11-26 12:00:26,581 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 133 selfloop transitions, 16 changer transitions 0/159 dead transitions. [2023-11-26 12:00:26,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 159 transitions, 646 flow [2023-11-26 12:00:26,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 12:00:26,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 12:00:26,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 266 transitions. [2023-11-26 12:00:26,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2023-11-26 12:00:26,585 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 266 transitions. [2023-11-26 12:00:26,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 266 transitions. [2023-11-26 12:00:26,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:00:26,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 266 transitions. [2023-11-26 12:00:26,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 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 12:00:26,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 49.0) internal successors, (490), 10 states have internal predecessors, (490), 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 12:00:26,592 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 49.0) internal successors, (490), 10 states have internal predecessors, (490), 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 12:00:26,592 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 108 flow. Second operand 9 states and 266 transitions. [2023-11-26 12:00:26,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 159 transitions, 646 flow [2023-11-26 12:00:26,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 159 transitions, 642 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 12:00:26,599 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 200 flow [2023-11-26 12:00:26,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=200, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2023-11-26 12:00:26,600 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2023-11-26 12:00:26,601 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 200 flow [2023-11-26 12:00:26,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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 12:00:26,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:00:26,602 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:26,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 12:00:26,602 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 12:00:26,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:26,605 INFO L85 PathProgramCache]: Analyzing trace with hash -2077458203, now seen corresponding path program 2 times [2023-11-26 12:00:26,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:26,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725698969] [2023-11-26 12:00:26,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:26,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:27,537 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 12:00:27,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:27,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725698969] [2023-11-26 12:00:27,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725698969] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:27,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212915791] [2023-11-26 12:00:27,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:00:27,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:27,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:27,542 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:27,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:00:27,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 12:00:27,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:00:27,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 12:00:27,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:28,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:00:28,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-26 12:00:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:00:28,267 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:28,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212915791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:28,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:00:28,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2023-11-26 12:00:28,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309193734] [2023-11-26 12:00:28,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:28,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 12:00:28,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:28,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 12:00:28,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-11-26 12:00:28,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-26 12:00:28,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 200 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 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 12:00:28,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:00:28,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-26 12:00:28,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:00:31,722 INFO L124 PetriNetUnfolderBase]: 4682/7659 cut-off events. [2023-11-26 12:00:31,722 INFO L125 PetriNetUnfolderBase]: For 765/765 co-relation queries the response was YES. [2023-11-26 12:00:31,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15830 conditions, 7659 events. 4682/7659 cut-off events. For 765/765 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 50191 event pairs, 901 based on Foata normal form. 2/7497 useless extension candidates. Maximal degree in co-relation 15809. Up to 4017 conditions per place. [2023-11-26 12:00:31,799 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 98 selfloop transitions, 22 changer transitions 9/157 dead transitions. [2023-11-26 12:00:31,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 157 transitions, 668 flow [2023-11-26 12:00:31,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 12:00:31,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-26 12:00:31,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 316 transitions. [2023-11-26 12:00:31,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862708719851577 [2023-11-26 12:00:31,807 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 316 transitions. [2023-11-26 12:00:31,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 316 transitions. [2023-11-26 12:00:31,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:00:31,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 316 transitions. [2023-11-26 12:00:31,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 28.727272727272727) internal successors, (316), 11 states have internal predecessors, (316), 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 12:00:31,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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 12:00:31,816 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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 12:00:31,816 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 200 flow. Second operand 11 states and 316 transitions. [2023-11-26 12:00:31,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 157 transitions, 668 flow [2023-11-26 12:00:31,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 157 transitions, 668 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 12:00:31,841 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 331 flow [2023-11-26 12:00:31,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=331, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2023-11-26 12:00:31,843 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 24 predicate places. [2023-11-26 12:00:31,844 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 331 flow [2023-11-26 12:00:31,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 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 12:00:31,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:00:31,848 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:31,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:32,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:32,055 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 12:00:32,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:32,056 INFO L85 PathProgramCache]: Analyzing trace with hash 332169557, now seen corresponding path program 3 times [2023-11-26 12:00:32,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:32,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220774216] [2023-11-26 12:00:32,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:32,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:32,858 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 12:00:32,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:32,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220774216] [2023-11-26 12:00:32,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220774216] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:32,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768029287] [2023-11-26 12:00:32,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 12:00:32,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:32,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:32,862 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:32,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:00:33,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-26 12:00:33,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:00:33,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 12:00:33,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:33,286 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:00:33,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-26 12:00:33,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:00:33,307 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:33,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768029287] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:33,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:00:33,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2023-11-26 12:00:33,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708318646] [2023-11-26 12:00:33,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:33,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 12:00:33,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:33,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 12:00:33,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2023-11-26 12:00:33,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-26 12:00:33,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 331 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 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 12:00:33,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:00:33,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-26 12:00:33,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:00:38,338 INFO L124 PetriNetUnfolderBase]: 7944/13161 cut-off events. [2023-11-26 12:00:38,338 INFO L125 PetriNetUnfolderBase]: For 6080/6092 co-relation queries the response was YES. [2023-11-26 12:00:38,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35644 conditions, 13161 events. 7944/13161 cut-off events. For 6080/6092 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 96426 event pairs, 2042 based on Foata normal form. 2/12957 useless extension candidates. Maximal degree in co-relation 35616. Up to 6109 conditions per place. [2023-11-26 12:00:38,475 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 150 selfloop transitions, 25 changer transitions 10/213 dead transitions. [2023-11-26 12:00:38,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 213 transitions, 1145 flow [2023-11-26 12:00:38,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 12:00:38,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-26 12:00:38,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 342 transitions. [2023-11-26 12:00:38,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.634508348794063 [2023-11-26 12:00:38,478 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 342 transitions. [2023-11-26 12:00:38,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 342 transitions. [2023-11-26 12:00:38,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:00:38,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 342 transitions. [2023-11-26 12:00:38,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 31.09090909090909) internal successors, (342), 11 states have internal predecessors, (342), 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 12:00:38,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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 12:00:38,482 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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 12:00:38,483 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 331 flow. Second operand 11 states and 342 transitions. [2023-11-26 12:00:38,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 213 transitions, 1145 flow [2023-11-26 12:00:38,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 213 transitions, 1145 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 12:00:38,522 INFO L231 Difference]: Finished difference. Result has 96 places, 102 transitions, 553 flow [2023-11-26 12:00:38,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=553, PETRI_PLACES=96, PETRI_TRANSITIONS=102} [2023-11-26 12:00:38,523 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 42 predicate places. [2023-11-26 12:00:38,523 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 102 transitions, 553 flow [2023-11-26 12:00:38,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 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 12:00:38,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:00:38,524 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:38,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:38,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:38,730 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 12:00:38,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:38,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1782826855, now seen corresponding path program 4 times [2023-11-26 12:00:38,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:38,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264658490] [2023-11-26 12:00:38,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:38,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:39,540 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 12:00:39,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:39,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264658490] [2023-11-26 12:00:39,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264658490] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:39,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092143613] [2023-11-26 12:00:39,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 12:00:39,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:39,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:39,543 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:39,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:00:39,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 12:00:39,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:00:39,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 12:00:39,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:39,918 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:00:39,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-26 12:00:39,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:00:39,936 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:39,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092143613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:39,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:00:39,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2023-11-26 12:00:39,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441885053] [2023-11-26 12:00:39,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:39,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 12:00:39,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:39,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 12:00:39,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-11-26 12:00:39,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-26 12:00:39,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 102 transitions, 553 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 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 12:00:39,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:00:39,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-26 12:00:39,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:00:42,691 INFO L124 PetriNetUnfolderBase]: 8836/14891 cut-off events. [2023-11-26 12:00:42,691 INFO L125 PetriNetUnfolderBase]: For 15892/15906 co-relation queries the response was YES. [2023-11-26 12:00:42,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45188 conditions, 14891 events. 8836/14891 cut-off events. For 15892/15906 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 112760 event pairs, 2352 based on Foata normal form. 2/14634 useless extension candidates. Maximal degree in co-relation 45150. Up to 10438 conditions per place. [2023-11-26 12:00:42,848 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 111 selfloop transitions, 24 changer transitions 21/184 dead transitions. [2023-11-26 12:00:42,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 184 transitions, 1187 flow [2023-11-26 12:00:42,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 12:00:42,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 12:00:42,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 291 transitions. [2023-11-26 12:00:42,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5938775510204082 [2023-11-26 12:00:42,851 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 291 transitions. [2023-11-26 12:00:42,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 291 transitions. [2023-11-26 12:00:42,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:00:42,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 291 transitions. [2023-11-26 12:00:42,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 29.1) internal successors, (291), 10 states have internal predecessors, (291), 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 12:00:42,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 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 12:00:42,856 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 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 12:00:42,856 INFO L175 Difference]: Start difference. First operand has 96 places, 102 transitions, 553 flow. Second operand 10 states and 291 transitions. [2023-11-26 12:00:42,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 184 transitions, 1187 flow [2023-11-26 12:00:43,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 184 transitions, 1171 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-26 12:00:43,263 INFO L231 Difference]: Finished difference. Result has 107 places, 110 transitions, 676 flow [2023-11-26 12:00:43,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=676, PETRI_PLACES=107, PETRI_TRANSITIONS=110} [2023-11-26 12:00:43,264 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 53 predicate places. [2023-11-26 12:00:43,264 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 110 transitions, 676 flow [2023-11-26 12:00:43,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 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 12:00:43,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:00:43,265 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:43,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:43,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:43,472 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 12:00:43,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:43,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1863072719, now seen corresponding path program 5 times [2023-11-26 12:00:43,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:43,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458107734] [2023-11-26 12:00:43,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:43,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:44,108 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 12:00:44,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:44,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458107734] [2023-11-26 12:00:44,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458107734] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:44,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579585708] [2023-11-26 12:00:44,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 12:00:44,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:44,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:44,111 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:44,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 12:00:44,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:00:44,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:00:44,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-26 12:00:44,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:44,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-26 12:00:44,681 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-26 12:00:44,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-11-26 12:00:44,823 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 12:00:44,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:46,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 88 [2023-11-26 12:00:46,268 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:00:46,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 112 [2023-11-26 12:00:46,819 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 12:00:46,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579585708] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:46,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:00:46,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2023-11-26 12:00:46,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670833278] [2023-11-26 12:00:46,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:46,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-26 12:00:46,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:46,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-26 12:00:46,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2023-11-26 12:00:46,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-26 12:00:46,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 110 transitions, 676 flow. Second operand has 29 states, 29 states have (on average 20.03448275862069) internal successors, (581), 29 states have internal predecessors, (581), 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 12:00:46,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:00:46,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-26 12:00:46,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:00:53,396 INFO L124 PetriNetUnfolderBase]: 20898/35427 cut-off events. [2023-11-26 12:00:53,396 INFO L125 PetriNetUnfolderBase]: For 44691/44735 co-relation queries the response was YES. [2023-11-26 12:00:53,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110160 conditions, 35427 events. 20898/35427 cut-off events. For 44691/44735 co-relation queries the response was YES. Maximal size of possible extension queue 1722. Compared 308496 event pairs, 6836 based on Foata normal form. 28/34938 useless extension candidates. Maximal degree in co-relation 110048. Up to 14548 conditions per place. [2023-11-26 12:00:53,707 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 83 selfloop transitions, 9 changer transitions 370/490 dead transitions. [2023-11-26 12:00:53,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 490 transitions, 3570 flow [2023-11-26 12:00:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-26 12:00:53,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-26 12:00:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 811 transitions. [2023-11-26 12:00:53,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5911078717201166 [2023-11-26 12:00:53,713 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 811 transitions. [2023-11-26 12:00:53,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 811 transitions. [2023-11-26 12:00:53,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:00:53,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 811 transitions. [2023-11-26 12:00:53,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 28.964285714285715) internal successors, (811), 28 states have internal predecessors, (811), 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 12:00:53,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 49.0) internal successors, (1421), 29 states have internal predecessors, (1421), 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 12:00:53,721 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 49.0) internal successors, (1421), 29 states have internal predecessors, (1421), 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 12:00:53,721 INFO L175 Difference]: Start difference. First operand has 107 places, 110 transitions, 676 flow. Second operand 28 states and 811 transitions. [2023-11-26 12:00:53,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 490 transitions, 3570 flow [2023-11-26 12:00:54,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 490 transitions, 3376 flow, removed 73 selfloop flow, removed 3 redundant places. [2023-11-26 12:00:54,918 INFO L231 Difference]: Finished difference. Result has 153 places, 110 transitions, 832 flow [2023-11-26 12:00:54,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=832, PETRI_PLACES=153, PETRI_TRANSITIONS=110} [2023-11-26 12:00:54,919 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 99 predicate places. [2023-11-26 12:00:54,919 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 110 transitions, 832 flow [2023-11-26 12:00:54,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 20.03448275862069) internal successors, (581), 29 states have internal predecessors, (581), 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 12:00:54,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:00:54,920 INFO L208 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:54,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:55,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 12:00:55,128 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 12:00:55,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:55,129 INFO L85 PathProgramCache]: Analyzing trace with hash 997746738, now seen corresponding path program 6 times [2023-11-26 12:00:55,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:55,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118576553] [2023-11-26 12:00:55,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:55,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:58,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:58,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118576553] [2023-11-26 12:00:58,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118576553] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:58,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976623242] [2023-11-26 12:00:58,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 12:00:58,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:58,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:58,034 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:58,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9910518f-f4f0-4628-9b69-5ed7134663f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 12:00:58,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-26 12:00:58,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:00:58,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-26 12:00:58,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:58,652 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:00:58,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-26 12:00:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:00:58,665 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:58,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976623242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:58,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:00:58,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 23 [2023-11-26 12:00:58,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258853630] [2023-11-26 12:00:58,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:58,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 12:00:58,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:58,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 12:00:58,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2023-11-26 12:00:58,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-26 12:00:58,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 110 transitions, 832 flow. Second operand has 12 states, 12 states have (on average 15.916666666666666) internal successors, (191), 12 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:58,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:00:58,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-26 12:00:58,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:01:06,945 INFO L124 PetriNetUnfolderBase]: 14404/23816 cut-off events. [2023-11-26 12:01:06,945 INFO L125 PetriNetUnfolderBase]: For 315821/315841 co-relation queries the response was YES. [2023-11-26 12:01:07,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128522 conditions, 23816 events. 14404/23816 cut-off events. For 315821/315841 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 181902 event pairs, 4012 based on Foata normal form. 2/23603 useless extension candidates. Maximal degree in co-relation 128453. Up to 15558 conditions per place. [2023-11-26 12:01:07,521 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 193 selfloop transitions, 53 changer transitions 10/280 dead transitions. [2023-11-26 12:01:07,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 280 transitions, 2615 flow [2023-11-26 12:01:07,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 12:01:07,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-26 12:01:07,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 394 transitions. [2023-11-26 12:01:07,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5360544217687074 [2023-11-26 12:01:07,527 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 394 transitions. [2023-11-26 12:01:07,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 394 transitions. [2023-11-26 12:01:07,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:01:07,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 394 transitions. [2023-11-26 12:01:07,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 26.266666666666666) internal successors, (394), 15 states have internal predecessors, (394), 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 12:01:07,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 49.0) internal successors, (784), 16 states have internal predecessors, (784), 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 12:01:07,539 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 49.0) internal successors, (784), 16 states have internal predecessors, (784), 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 12:01:07,540 INFO L175 Difference]: Start difference. First operand has 153 places, 110 transitions, 832 flow. Second operand 15 states and 394 transitions. [2023-11-26 12:01:07,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 280 transitions, 2615 flow