./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd --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 d2c89f010e0f73e8ba7e81bb150b82b70d39c0827c0d616dd2c3347839d51e01 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 14:02:00,569 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 14:02:00,639 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 14:02:00,648 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 14:02:00,649 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 14:02:00,695 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 14:02:00,695 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 14:02:00,696 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 14:02:00,697 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 14:02:00,697 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 14:02:00,697 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 14:02:00,698 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 14:02:00,699 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 14:02:00,699 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 14:02:00,700 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 14:02:00,700 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 14:02:00,700 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 14:02:00,701 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 14:02:00,701 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 14:02:00,701 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 14:02:00,701 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 14:02:00,701 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 14:02:00,701 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 14:02:00,701 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 14:02:00,702 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 14:02:00,702 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 14:02:00,702 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 14:02:00,702 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 14:02:00,702 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 14:02:00,702 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 14:02:00,703 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 14:02:00,703 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 14:02:00,703 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:02:00,703 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 14:02:00,704 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 14:02:00,704 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 14:02:00,704 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 14:02:00,705 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 14:02:00,705 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 14:02:00,705 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 14:02:00,705 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 14:02:00,706 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 14:02:00,706 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd 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 -> d2c89f010e0f73e8ba7e81bb150b82b70d39c0827c0d616dd2c3347839d51e01 [2024-11-13 14:02:01,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 14:02:01,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 14:02:01,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 14:02:01,093 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 14:02:01,093 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 14:02:01,095 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c Unable to find full path for "g++" [2024-11-13 14:02:03,005 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 14:02:03,339 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 14:02:03,341 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2024-11-13 14:02:03,351 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/data/18fc0aae5/e5f0abceab86422ca5624cd535d5b90a/FLAGe2b41308e [2024-11-13 14:02:03,369 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/data/18fc0aae5/e5f0abceab86422ca5624cd535d5b90a [2024-11-13 14:02:03,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 14:02:03,373 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 14:02:03,375 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 14:02:03,375 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 14:02:03,380 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 14:02:03,381 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:02:03" (1/1) ... [2024-11-13 14:02:03,382 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1447a15f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:02:03, skipping insertion in model container [2024-11-13 14:02:03,382 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:02:03" (1/1) ... [2024-11-13 14:02:03,401 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 14:02:03,611 WARN L250 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_b90b7057-0e38-4b30-b98c-3c9cc626998a/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3451,3464] [2024-11-13 14:02:03,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:02:03,634 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 14:02:03,661 WARN L250 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_b90b7057-0e38-4b30-b98c-3c9cc626998a/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3451,3464] [2024-11-13 14:02:03,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:02:03,690 INFO L204 MainTranslator]: Completed translation [2024-11-13 14:02:03,690 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:02:03 WrapperNode [2024-11-13 14:02:03,691 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 14:02:03,694 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 14:02:03,694 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 14:02:03,695 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 14:02:03,702 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:02:03" (1/1) ... [2024-11-13 14:02:03,710 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:02:03" (1/1) ... [2024-11-13 14:02:03,738 INFO L138 Inliner]: procedures = 24, calls = 40, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 234 [2024-11-13 14:02:03,738 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 14:02:03,739 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 14:02:03,739 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 14:02:03,739 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 14:02:03,753 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:02:03" (1/1) ... [2024-11-13 14:02:03,754 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:02:03" (1/1) ... [2024-11-13 14:02:03,759 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:02:03" (1/1) ... [2024-11-13 14:02:03,787 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-13 14:02:03,787 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:02:03" (1/1) ... [2024-11-13 14:02:03,788 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:02:03" (1/1) ... [2024-11-13 14:02:03,800 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:02:03" (1/1) ... [2024-11-13 14:02:03,804 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:02:03" (1/1) ... [2024-11-13 14:02:03,806 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:02:03" (1/1) ... [2024-11-13 14:02:03,807 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:02:03" (1/1) ... [2024-11-13 14:02:03,810 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 14:02:03,811 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 14:02:03,811 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 14:02:03,811 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 14:02:03,812 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:02:03" (1/1) ... [2024-11-13 14:02:03,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:02:03,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:02:03,844 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 14:02:03,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 14:02:03,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 14:02:03,879 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 14:02:03,879 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 14:02:03,879 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 14:02:03,879 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 14:02:03,879 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-13 14:02:03,879 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-13 14:02:03,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 14:02:03,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 14:02:03,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 14:02:03,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 14:02:03,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-13 14:02:03,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-13 14:02:03,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 14:02:03,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 14:02:03,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 14:02:03,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 14:02:03,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 14:02:03,881 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 14:02:04,012 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 14:02:04,013 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 14:02:04,640 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 14:02:04,640 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 14:02:05,095 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 14:02:05,095 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-13 14:02:05,096 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:02:05 BoogieIcfgContainer [2024-11-13 14:02:05,096 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 14:02:05,100 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 14:02:05,100 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 14:02:05,105 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 14:02:05,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:02:03" (1/3) ... [2024-11-13 14:02:05,106 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192e4560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:02:05, skipping insertion in model container [2024-11-13 14:02:05,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:02:03" (2/3) ... [2024-11-13 14:02:05,106 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192e4560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:02:05, skipping insertion in model container [2024-11-13 14:02:05,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:02:05" (3/3) ... [2024-11-13 14:02:05,108 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2024-11-13 14:02:05,124 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 14:02:05,126 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-queue-add-3.wvr.c that has 4 procedures, 38 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2024-11-13 14:02:05,126 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 14:02:05,201 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-13 14:02:05,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 44 transitions, 109 flow [2024-11-13 14:02:05,294 INFO L124 PetriNetUnfolderBase]: 7/41 cut-off events. [2024-11-13 14:02:05,296 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-13 14:02:05,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 41 events. 7/41 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-11-13 14:02:05,301 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 44 transitions, 109 flow [2024-11-13 14:02:05,306 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 40 transitions, 98 flow [2024-11-13 14:02:05,319 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 14:02:05,338 INFO L333 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, 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;@536b49d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 14:02:05,339 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-13 14:02:05,360 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 14:02:05,363 INFO L124 PetriNetUnfolderBase]: 7/39 cut-off events. [2024-11-13 14:02:05,364 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-13 14:02:05,364 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:02:05,365 INFO L204 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] [2024-11-13 14:02:05,365 INFO L396 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)] === [2024-11-13 14:02:05,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:02:05,370 INFO L85 PathProgramCache]: Analyzing trace with hash 225788283, now seen corresponding path program 1 times [2024-11-13 14:02:05,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:02:05,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92480501] [2024-11-13 14:02:05,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:02:05,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:02:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:02:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:02:05,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:02:05,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92480501] [2024-11-13 14:02:05,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92480501] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:02:05,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:02:05,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:02:05,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614991506] [2024-11-13 14:02:05,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:02:05,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-13 14:02:05,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:02:05,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-13 14:02:05,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 14:02:05,725 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-13 14:02:05,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 98 flow. Second operand has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 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) [2024-11-13 14:02:05,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:02:05,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-13 14:02:05,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:02:06,178 INFO L124 PetriNetUnfolderBase]: 745/1321 cut-off events. [2024-11-13 14:02:06,179 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-11-13 14:02:06,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2415 conditions, 1321 events. 745/1321 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6824 event pairs, 595 based on Foata normal form. 130/1314 useless extension candidates. Maximal degree in co-relation 2250. Up to 991 conditions per place. [2024-11-13 14:02:06,209 INFO L140 encePairwiseOnDemand]: 42/44 looper letters, 28 selfloop transitions, 0 changer transitions 0/38 dead transitions. [2024-11-13 14:02:06,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 38 transitions, 150 flow [2024-11-13 14:02:06,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-13 14:02:06,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-13 14:02:06,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 56 transitions. [2024-11-13 14:02:06,232 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-11-13 14:02:06,234 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 98 flow. Second operand 2 states and 56 transitions. [2024-11-13 14:02:06,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 38 transitions, 150 flow [2024-11-13 14:02:06,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 138 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-13 14:02:06,249 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 82 flow [2024-11-13 14:02:06,252 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=82, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2024-11-13 14:02:06,258 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -5 predicate places. [2024-11-13 14:02:06,260 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 82 flow [2024-11-13 14:02:06,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 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) [2024-11-13 14:02:06,261 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:02:06,261 INFO L204 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] [2024-11-13 14:02:06,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 14:02:06,262 INFO L396 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)] === [2024-11-13 14:02:06,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:02:06,264 INFO L85 PathProgramCache]: Analyzing trace with hash 246963000, now seen corresponding path program 1 times [2024-11-13 14:02:06,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:02:06,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848876379] [2024-11-13 14:02:06,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:02:06,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:02:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:02:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:02:06,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:02:06,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848876379] [2024-11-13 14:02:06,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848876379] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:02:06,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:02:06,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:02:06,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577100258] [2024-11-13 14:02:06,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:02:06,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:02:06,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:02:06,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:02:06,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:02:06,580 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-13 14:02:06,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2024-11-13 14:02:06,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:02:06,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-13 14:02:06,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:02:06,932 INFO L124 PetriNetUnfolderBase]: 699/1299 cut-off events. [2024-11-13 14:02:06,932 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-13 14:02:06,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2332 conditions, 1299 events. 699/1299 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 6852 event pairs, 234 based on Foata normal form. 39/1225 useless extension candidates. Maximal degree in co-relation 2329. Up to 657 conditions per place. [2024-11-13 14:02:06,942 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 39 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-11-13 14:02:06,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 192 flow [2024-11-13 14:02:06,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:02:06,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 14:02:06,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-11-13 14:02:06,944 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2024-11-13 14:02:06,944 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 82 flow. Second operand 3 states and 81 transitions. [2024-11-13 14:02:06,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 192 flow [2024-11-13 14:02:06,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 51 transitions, 192 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-13 14:02:06,947 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 94 flow [2024-11-13 14:02:06,948 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2024-11-13 14:02:06,949 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2024-11-13 14:02:06,949 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 94 flow [2024-11-13 14:02:06,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2024-11-13 14:02:06,949 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:02:06,949 INFO L204 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] [2024-11-13 14:02:06,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 14:02:06,950 INFO L396 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)] === [2024-11-13 14:02:06,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:02:06,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1598024318, now seen corresponding path program 2 times [2024-11-13 14:02:06,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:02:06,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814184768] [2024-11-13 14:02:06,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:02:06,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:02:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:02:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:02:07,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:02:07,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814184768] [2024-11-13 14:02:07,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814184768] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:02:07,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:02:07,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:02:07,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156373290] [2024-11-13 14:02:07,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:02:07,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:02:07,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:02:07,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:02:07,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:02:07,407 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-13 14:02:07,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:02:07,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:02:07,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-13 14:02:07,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:02:07,788 INFO L124 PetriNetUnfolderBase]: 747/1400 cut-off events. [2024-11-13 14:02:07,788 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2024-11-13 14:02:07,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2719 conditions, 1400 events. 747/1400 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7486 event pairs, 591 based on Foata normal form. 42/1328 useless extension candidates. Maximal degree in co-relation 2714. Up to 988 conditions per place. [2024-11-13 14:02:07,801 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 28 selfloop transitions, 2 changer transitions 13/53 dead transitions. [2024-11-13 14:02:07,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 211 flow [2024-11-13 14:02:07,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:02:07,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 14:02:07,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-11-13 14:02:07,807 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5511363636363636 [2024-11-13 14:02:07,807 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 94 flow. Second operand 4 states and 97 transitions. [2024-11-13 14:02:07,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 211 flow [2024-11-13 14:02:07,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 53 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 14:02:07,812 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 110 flow [2024-11-13 14:02:07,813 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=110, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-11-13 14:02:07,814 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2024-11-13 14:02:07,814 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 110 flow [2024-11-13 14:02:07,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:02:07,815 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:02:07,815 INFO L204 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] [2024-11-13 14:02:07,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 14:02:07,816 INFO L396 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)] === [2024-11-13 14:02:07,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:02:07,817 INFO L85 PathProgramCache]: Analyzing trace with hash 364888949, now seen corresponding path program 1 times [2024-11-13 14:02:07,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:02:07,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927244954] [2024-11-13 14:02:07,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:02:07,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:02:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:02:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:02:08,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:02:08,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927244954] [2024-11-13 14:02:08,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927244954] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:02:08,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:02:08,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:02:08,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352261853] [2024-11-13 14:02:08,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:02:08,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:02:08,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:02:08,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:02:08,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:02:08,143 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-13 14:02:08,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:02:08,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:02:08,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-13 14:02:08,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:02:08,518 INFO L124 PetriNetUnfolderBase]: 899/1662 cut-off events. [2024-11-13 14:02:08,519 INFO L125 PetriNetUnfolderBase]: For 389/389 co-relation queries the response was YES. [2024-11-13 14:02:08,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3481 conditions, 1662 events. 899/1662 cut-off events. For 389/389 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 9198 event pairs, 724 based on Foata normal form. 38/1580 useless extension candidates. Maximal degree in co-relation 3474. Up to 989 conditions per place. [2024-11-13 14:02:08,530 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 29 selfloop transitions, 2 changer transitions 17/58 dead transitions. [2024-11-13 14:02:08,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 252 flow [2024-11-13 14:02:08,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:02:08,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 14:02:08,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-11-13 14:02:08,532 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-13 14:02:08,532 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 110 flow. Second operand 4 states and 99 transitions. [2024-11-13 14:02:08,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 252 flow [2024-11-13 14:02:08,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 248 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-13 14:02:08,535 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 120 flow [2024-11-13 14:02:08,537 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-11-13 14:02:08,539 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2024-11-13 14:02:08,539 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 120 flow [2024-11-13 14:02:08,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:02:08,539 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:02:08,539 INFO L204 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] [2024-11-13 14:02:08,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 14:02:08,540 INFO L396 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)] === [2024-11-13 14:02:08,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:02:08,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1684935069, now seen corresponding path program 1 times [2024-11-13 14:02:08,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:02:08,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272811710] [2024-11-13 14:02:08,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:02:08,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:02:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:02:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 14:02:09,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:02:09,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272811710] [2024-11-13 14:02:09,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272811710] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:02:09,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:02:09,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-13 14:02:09,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341522244] [2024-11-13 14:02:09,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:02:09,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 14:02:09,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:02:09,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 14:02:09,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-13 14:02:09,056 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-11-13 14:02:09,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 120 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:02:09,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:02:09,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-11-13 14:02:09,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:02:09,806 INFO L124 PetriNetUnfolderBase]: 1634/2687 cut-off events. [2024-11-13 14:02:09,807 INFO L125 PetriNetUnfolderBase]: For 830/868 co-relation queries the response was YES. [2024-11-13 14:02:09,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6093 conditions, 2687 events. 1634/2687 cut-off events. For 830/868 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15668 event pairs, 455 based on Foata normal form. 1/2569 useless extension candidates. Maximal degree in co-relation 6084. Up to 844 conditions per place. [2024-11-13 14:02:09,830 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 80 selfloop transitions, 9 changer transitions 11/108 dead transitions. [2024-11-13 14:02:09,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 108 transitions, 515 flow [2024-11-13 14:02:09,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 14:02:09,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-13 14:02:09,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-11-13 14:02:09,832 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-11-13 14:02:09,832 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 120 flow. Second operand 8 states and 184 transitions. [2024-11-13 14:02:09,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 108 transitions, 515 flow [2024-11-13 14:02:09,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 108 transitions, 505 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-13 14:02:09,837 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 172 flow [2024-11-13 14:02:09,838 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=172, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-11-13 14:02:09,838 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-11-13 14:02:09,839 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 172 flow [2024-11-13 14:02:09,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:02:09,839 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:02:09,839 INFO L204 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] [2024-11-13 14:02:09,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 14:02:09,840 INFO L396 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)] === [2024-11-13 14:02:09,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:02:09,841 INFO L85 PathProgramCache]: Analyzing trace with hash -2147193049, now seen corresponding path program 2 times [2024-11-13 14:02:09,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:02:09,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534894896] [2024-11-13 14:02:09,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:02:09,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:02:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:02:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 14:02:09,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:02:09,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534894896] [2024-11-13 14:02:09,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534894896] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:02:09,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:02:09,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:02:09,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119095620] [2024-11-13 14:02:09,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:02:09,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:02:09,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:02:09,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:02:09,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:02:09,962 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-13 14:02:09,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:02:09,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:02:09,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-13 14:02:09,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:02:10,317 INFO L124 PetriNetUnfolderBase]: 1022/1927 cut-off events. [2024-11-13 14:02:10,318 INFO L125 PetriNetUnfolderBase]: For 827/830 co-relation queries the response was YES. [2024-11-13 14:02:10,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4580 conditions, 1927 events. 1022/1927 cut-off events. For 827/830 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 11017 event pairs, 369 based on Foata normal form. 15/1850 useless extension candidates. Maximal degree in co-relation 4568. Up to 1393 conditions per place. [2024-11-13 14:02:10,336 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 40 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2024-11-13 14:02:10,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 278 flow [2024-11-13 14:02:10,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:02:10,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 14:02:10,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-11-13 14:02:10,338 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-11-13 14:02:10,339 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 172 flow. Second operand 3 states and 78 transitions. [2024-11-13 14:02:10,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 278 flow [2024-11-13 14:02:10,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 56 transitions, 270 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-13 14:02:10,343 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 183 flow [2024-11-13 14:02:10,343 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-11-13 14:02:10,344 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-11-13 14:02:10,344 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 183 flow [2024-11-13 14:02:10,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:02:10,344 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:02:10,344 INFO L204 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] [2024-11-13 14:02:10,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 14:02:10,345 INFO L396 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)] === [2024-11-13 14:02:10,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:02:10,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1045653886, now seen corresponding path program 1 times [2024-11-13 14:02:10,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:02:10,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116754665] [2024-11-13 14:02:10,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:02:10,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:02:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:02:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:02:10,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:02:10,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116754665] [2024-11-13 14:02:10,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116754665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:02:10,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210933288] [2024-11-13 14:02:10,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:02:10,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:02:10,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:02:10,655 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:02:10,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 14:02:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:02:10,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 14:02:10,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:02:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:02:10,945 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:02:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:02:11,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210933288] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:02:11,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:02:11,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-13 14:02:11,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839618878] [2024-11-13 14:02:11,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:02:11,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 14:02:11,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:02:11,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 14:02:11,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-13 14:02:11,164 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-13 14:02:11,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 183 flow. Second operand has 12 states, 12 states have (on average 16.5) internal successors, (198), 12 states have internal predecessors, (198), 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) [2024-11-13 14:02:11,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:02:11,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-13 14:02:11,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:02:11,966 INFO L124 PetriNetUnfolderBase]: 1661/3280 cut-off events. [2024-11-13 14:02:11,967 INFO L125 PetriNetUnfolderBase]: For 2333/2338 co-relation queries the response was YES. [2024-11-13 14:02:11,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8091 conditions, 3280 events. 1661/3280 cut-off events. For 2333/2338 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 21865 event pairs, 1040 based on Foata normal form. 113/3242 useless extension candidates. Maximal degree in co-relation 8079. Up to 1488 conditions per place. [2024-11-13 14:02:11,996 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 66 selfloop transitions, 5 changer transitions 4/88 dead transitions. [2024-11-13 14:02:11,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 88 transitions, 470 flow [2024-11-13 14:02:11,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:02:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 14:02:11,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-11-13 14:02:11,998 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-11-13 14:02:11,998 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 183 flow. Second operand 6 states and 144 transitions. [2024-11-13 14:02:11,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 88 transitions, 470 flow [2024-11-13 14:02:12,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 88 transitions, 449 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-13 14:02:12,004 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 212 flow [2024-11-13 14:02:12,005 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2024-11-13 14:02:12,005 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-11-13 14:02:12,006 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 212 flow [2024-11-13 14:02:12,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.5) internal successors, (198), 12 states have internal predecessors, (198), 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) [2024-11-13 14:02:12,006 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:02:12,006 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:02:12,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 14:02:12,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:02:12,211 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-13 14:02:12,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:02:12,212 INFO L85 PathProgramCache]: Analyzing trace with hash -770667721, now seen corresponding path program 1 times [2024-11-13 14:02:12,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:02:12,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158582603] [2024-11-13 14:02:12,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:02:12,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:02:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:02:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 14:02:12,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:02:12,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158582603] [2024-11-13 14:02:12,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158582603] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:02:12,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:02:12,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:02:12,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430401846] [2024-11-13 14:02:12,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:02:12,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:02:12,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:02:12,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:02:12,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:02:12,385 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-13 14:02:12,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:02:12,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:02:12,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-13 14:02:12,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:02:13,239 INFO L124 PetriNetUnfolderBase]: 2547/5194 cut-off events. [2024-11-13 14:02:13,240 INFO L125 PetriNetUnfolderBase]: For 2875/3035 co-relation queries the response was YES. [2024-11-13 14:02:13,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11983 conditions, 5194 events. 2547/5194 cut-off events. For 2875/3035 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 37580 event pairs, 732 based on Foata normal form. 132/5068 useless extension candidates. Maximal degree in co-relation 11969. Up to 1363 conditions per place. [2024-11-13 14:02:13,290 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 71 selfloop transitions, 6 changer transitions 0/90 dead transitions. [2024-11-13 14:02:13,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 90 transitions, 497 flow [2024-11-13 14:02:13,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:02:13,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 14:02:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-11-13 14:02:13,297 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6590909090909091 [2024-11-13 14:02:13,297 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 212 flow. Second operand 4 states and 116 transitions. [2024-11-13 14:02:13,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 90 transitions, 497 flow [2024-11-13 14:02:13,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 90 transitions, 474 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-11-13 14:02:13,313 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 250 flow [2024-11-13 14:02:13,314 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=250, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2024-11-13 14:02:13,314 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-11-13 14:02:13,315 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 250 flow [2024-11-13 14:02:13,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:02:13,315 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:02:13,315 INFO L204 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] [2024-11-13 14:02:13,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 14:02:13,315 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-13 14:02:13,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:02:13,316 INFO L85 PathProgramCache]: Analyzing trace with hash 720609179, now seen corresponding path program 2 times [2024-11-13 14:02:13,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:02:13,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46832609] [2024-11-13 14:02:13,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:02:13,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:02:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:02:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:02:14,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:02:14,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46832609] [2024-11-13 14:02:14,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46832609] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:02:14,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151350824] [2024-11-13 14:02:14,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:02:14,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:02:14,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:02:14,625 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:02:14,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 14:02:14,780 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:02:14,780 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:02:14,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 14:02:14,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:02:15,137 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 9 treesize of output 3 [2024-11-13 14:02:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:02:15,283 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:02:15,614 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 14:02:15,615 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 24 treesize of output 11 [2024-11-13 14:02:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:02:15,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151350824] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:02:15,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:02:15,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-11-13 14:02:15,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920456859] [2024-11-13 14:02:15,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:02:15,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 14:02:15,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:02:15,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 14:02:15,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2024-11-13 14:02:16,054 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-11-13 14:02:16,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 250 flow. Second operand has 22 states, 22 states have (on average 14.363636363636363) internal successors, (316), 22 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) [2024-11-13 14:02:16,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:02:16,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-11-13 14:02:16,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:02:21,090 INFO L124 PetriNetUnfolderBase]: 15493/25932 cut-off events. [2024-11-13 14:02:21,090 INFO L125 PetriNetUnfolderBase]: For 35031/36560 co-relation queries the response was YES. [2024-11-13 14:02:21,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69703 conditions, 25932 events. 15493/25932 cut-off events. For 35031/36560 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 192795 event pairs, 1780 based on Foata normal form. 129/25081 useless extension candidates. Maximal degree in co-relation 69688. Up to 3890 conditions per place. [2024-11-13 14:02:21,295 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 348 selfloop transitions, 62 changer transitions 0/421 dead transitions. [2024-11-13 14:02:21,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 421 transitions, 2616 flow [2024-11-13 14:02:21,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-13 14:02:21,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-13 14:02:21,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 641 transitions. [2024-11-13 14:02:21,302 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5395622895622896 [2024-11-13 14:02:21,302 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 250 flow. Second operand 27 states and 641 transitions. [2024-11-13 14:02:21,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 421 transitions, 2616 flow [2024-11-13 14:02:21,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 421 transitions, 2548 flow, removed 34 selfloop flow, removed 0 redundant places. [2024-11-13 14:02:21,332 INFO L231 Difference]: Finished difference. Result has 96 places, 129 transitions, 753 flow [2024-11-13 14:02:21,333 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=753, PETRI_PLACES=96, PETRI_TRANSITIONS=129} [2024-11-13 14:02:21,334 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-11-13 14:02:21,335 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 129 transitions, 753 flow [2024-11-13 14:02:21,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 14.363636363636363) internal successors, (316), 22 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) [2024-11-13 14:02:21,336 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:02:21,336 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:02:21,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 14:02:21,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:02:21,537 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-13 14:02:21,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:02:21,538 INFO L85 PathProgramCache]: Analyzing trace with hash -821956734, now seen corresponding path program 3 times [2024-11-13 14:02:21,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:02:21,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113974370] [2024-11-13 14:02:21,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:02:21,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:02:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:02:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:02:23,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:02:23,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113974370] [2024-11-13 14:02:23,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113974370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:02:23,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735366850] [2024-11-13 14:02:23,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:02:23,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:02:23,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:02:23,579 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:02:23,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 14:02:23,722 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 14:02:23,723 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:02:23,725 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 14:02:23,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:02:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 14:02:23,850 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:02:23,910 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 14:02:23,910 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 25 treesize of output 12 [2024-11-13 14:02:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 14:02:23,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735366850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:02:23,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:02:23,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 13 [2024-11-13 14:02:23,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524560906] [2024-11-13 14:02:23,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:02:23,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 14:02:23,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:02:23,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 14:02:23,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-13 14:02:23,992 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-11-13 14:02:23,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 129 transitions, 753 flow. Second operand has 14 states, 14 states have (on average 15.214285714285714) internal successors, (213), 14 states have internal predecessors, (213), 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) [2024-11-13 14:02:23,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:02:23,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-11-13 14:02:23,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:02:27,586 INFO L124 PetriNetUnfolderBase]: 15536/26373 cut-off events. [2024-11-13 14:02:27,587 INFO L125 PetriNetUnfolderBase]: For 59463/61063 co-relation queries the response was YES. [2024-11-13 14:02:27,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80252 conditions, 26373 events. 15536/26373 cut-off events. For 59463/61063 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 197405 event pairs, 3628 based on Foata normal form. 135/26089 useless extension candidates. Maximal degree in co-relation 80229. Up to 15352 conditions per place. [2024-11-13 14:02:28,086 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 179 selfloop transitions, 50 changer transitions 0/240 dead transitions. [2024-11-13 14:02:28,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 240 transitions, 1676 flow [2024-11-13 14:02:28,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 14:02:28,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-13 14:02:28,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 273 transitions. [2024-11-13 14:02:28,088 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-11-13 14:02:28,088 INFO L175 Difference]: Start difference. First operand has 96 places, 129 transitions, 753 flow. Second operand 13 states and 273 transitions. [2024-11-13 14:02:28,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 240 transitions, 1676 flow [2024-11-13 14:02:28,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 240 transitions, 1466 flow, removed 100 selfloop flow, removed 4 redundant places. [2024-11-13 14:02:28,776 INFO L231 Difference]: Finished difference. Result has 107 places, 146 transitions, 848 flow [2024-11-13 14:02:28,777 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=848, PETRI_PLACES=107, PETRI_TRANSITIONS=146} [2024-11-13 14:02:28,777 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-11-13 14:02:28,777 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 146 transitions, 848 flow [2024-11-13 14:02:28,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.214285714285714) internal successors, (213), 14 states have internal predecessors, (213), 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) [2024-11-13 14:02:28,778 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:02:28,778 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:02:28,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 14:02:28,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 14:02:28,978 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-13 14:02:28,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:02:28,979 INFO L85 PathProgramCache]: Analyzing trace with hash -555300363, now seen corresponding path program 1 times [2024-11-13 14:02:28,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:02:28,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74844328] [2024-11-13 14:02:28,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:02:28,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:02:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:02:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:02:29,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:02:29,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74844328] [2024-11-13 14:02:29,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74844328] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:02:29,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976939538] [2024-11-13 14:02:29,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:02:29,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:02:29,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:02:29,263 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:02:29,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 14:02:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:02:29,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 14:02:29,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:02:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:02:29,525 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:02:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:02:29,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976939538] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:02:29,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:02:29,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2024-11-13 14:02:29,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126048327] [2024-11-13 14:02:29,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:02:29,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 14:02:29,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:02:29,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 14:02:29,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-13 14:02:29,690 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-13 14:02:29,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 146 transitions, 848 flow. Second operand has 13 states, 13 states have (on average 16.23076923076923) internal successors, (211), 13 states have internal predecessors, (211), 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) [2024-11-13 14:02:29,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:02:29,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-13 14:02:29,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:02:32,415 INFO L124 PetriNetUnfolderBase]: 11166/20556 cut-off events. [2024-11-13 14:02:32,415 INFO L125 PetriNetUnfolderBase]: For 43341/44886 co-relation queries the response was YES. [2024-11-13 14:02:32,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60925 conditions, 20556 events. 11166/20556 cut-off events. For 43341/44886 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 161275 event pairs, 3400 based on Foata normal form. 177/20274 useless extension candidates. Maximal degree in co-relation 60901. Up to 14999 conditions per place. [2024-11-13 14:02:32,543 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 113 selfloop transitions, 9 changer transitions 35/186 dead transitions. [2024-11-13 14:02:32,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 186 transitions, 1280 flow [2024-11-13 14:02:32,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 14:02:32,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-13 14:02:32,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-11-13 14:02:32,545 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5085227272727273 [2024-11-13 14:02:32,545 INFO L175 Difference]: Start difference. First operand has 107 places, 146 transitions, 848 flow. Second operand 8 states and 179 transitions. [2024-11-13 14:02:32,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 186 transitions, 1280 flow [2024-11-13 14:02:32,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 186 transitions, 1256 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-11-13 14:02:32,770 INFO L231 Difference]: Finished difference. Result has 110 places, 144 transitions, 826 flow [2024-11-13 14:02:32,770 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=826, PETRI_PLACES=110, PETRI_TRANSITIONS=144} [2024-11-13 14:02:32,771 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-11-13 14:02:32,771 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 144 transitions, 826 flow [2024-11-13 14:02:32,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.23076923076923) internal successors, (211), 13 states have internal predecessors, (211), 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) [2024-11-13 14:02:32,771 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:02:32,771 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:02:32,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 14:02:32,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-13 14:02:32,972 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-13 14:02:32,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:02:32,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1773220233, now seen corresponding path program 1 times [2024-11-13 14:02:32,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:02:32,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843887968] [2024-11-13 14:02:32,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:02:32,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:02:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:02:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:02:33,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:02:33,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843887968] [2024-11-13 14:02:33,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843887968] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:02:33,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213721554] [2024-11-13 14:02:33,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:02:33,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:02:33,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:02:33,188 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:02:33,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 14:02:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:02:33,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 14:02:33,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:02:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:02:33,451 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:02:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:02:33,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213721554] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:02:33,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:02:33,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-13 14:02:33,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536680380] [2024-11-13 14:02:33,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:02:33,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 14:02:33,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:02:33,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 14:02:33,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-13 14:02:33,613 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-13 14:02:33,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 144 transitions, 826 flow. Second operand has 12 states, 12 states have (on average 17.0) internal successors, (204), 12 states have internal predecessors, (204), 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) [2024-11-13 14:02:33,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:02:33,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-13 14:02:33,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:02:36,674 INFO L124 PetriNetUnfolderBase]: 13110/24524 cut-off events. [2024-11-13 14:02:36,674 INFO L125 PetriNetUnfolderBase]: For 48258/49774 co-relation queries the response was YES. [2024-11-13 14:02:36,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71692 conditions, 24524 events. 13110/24524 cut-off events. For 48258/49774 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 200694 event pairs, 7432 based on Foata normal form. 378/24386 useless extension candidates. Maximal degree in co-relation 71666. Up to 15313 conditions per place. [2024-11-13 14:02:36,975 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 111 selfloop transitions, 5 changer transitions 79/224 dead transitions. [2024-11-13 14:02:36,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 224 transitions, 1648 flow [2024-11-13 14:02:36,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:02:36,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 14:02:36,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-11-13 14:02:36,976 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5378787878787878 [2024-11-13 14:02:36,976 INFO L175 Difference]: Start difference. First operand has 110 places, 144 transitions, 826 flow. Second operand 6 states and 142 transitions. [2024-11-13 14:02:36,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 224 transitions, 1648 flow [2024-11-13 14:02:37,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 224 transitions, 1602 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-11-13 14:02:37,265 INFO L231 Difference]: Finished difference. Result has 106 places, 145 transitions, 826 flow [2024-11-13 14:02:37,265 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=826, PETRI_PLACES=106, PETRI_TRANSITIONS=145} [2024-11-13 14:02:37,265 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-11-13 14:02:37,266 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 145 transitions, 826 flow [2024-11-13 14:02:37,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.0) internal successors, (204), 12 states have internal predecessors, (204), 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) [2024-11-13 14:02:37,266 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:02:37,266 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:02:37,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 14:02:37,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-13 14:02:37,470 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-13 14:02:37,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:02:37,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1783928555, now seen corresponding path program 2 times [2024-11-13 14:02:37,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:02:37,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493416308] [2024-11-13 14:02:37,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:02:37,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:02:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:02:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:02:38,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:02:38,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493416308] [2024-11-13 14:02:38,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493416308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:02:38,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31545268] [2024-11-13 14:02:38,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:02:38,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:02:38,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:02:38,507 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:02:38,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 14:02:38,655 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:02:38,656 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:02:38,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 14:02:38,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:02:39,017 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 24 treesize of output 8 [2024-11-13 14:02:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:02:39,062 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:02:39,384 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 14:02:39,385 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 24 treesize of output 11 [2024-11-13 14:02:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:02:39,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31545268] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:02:39,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:02:39,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 28 [2024-11-13 14:02:39,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120558777] [2024-11-13 14:02:39,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:02:39,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-13 14:02:39,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:02:39,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-13 14:02:39,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2024-11-13 14:02:40,107 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-13 14:02:40,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 145 transitions, 826 flow. Second operand has 29 states, 29 states have (on average 12.172413793103448) internal successors, (353), 29 states have internal predecessors, (353), 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) [2024-11-13 14:02:40,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:02:40,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-13 14:02:40,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:02:51,562 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([710] L94-->L87-3: Formula: (= |v_thread3Thread1of1ForFork0_~k~0#1_7| 0) InVars {thread3Thread1of1ForFork0_~k~0#1=|v_thread3Thread1of1ForFork0_~k~0#1_7|} OutVars{thread3Thread1of1ForFork0_~k~0#1=|v_thread3Thread1of1ForFork0_~k~0#1_7|} AuxVars[] AssignedVars[][458], [1375#(or (not (= 2 ~n2~0)) (< ~q2_front~0 (+ ~q2_back~0 1))), Black: 64#(and (= |ULTIMATE.start_create_fresh_int_array_~i~1#1| 0) (= |ULTIMATE.start_create_fresh_int_array_~size#1| ~n2~0)), Black: 835#(and (= ~q1~0.offset 0) (or (< ~q1_front~0 1) (< ~n1~0 (+ ~q1_back~0 1)) (= ~q1_front~0 1)) (= 1 (select (select |#memory_int#1| ~q1~0.base) (* ~q1_front~0 4)))), Black: 680#(= |thread2Thread1of1ForFork2_~j~0#1| 1), 50#true, Black: 582#(and (or (not (= |thread2Thread1of1ForFork2_~j~0#1| 0)) (< ~n1~0 (+ ~q1_back~0 1))) (or (< 0 |thread2Thread1of1ForFork2_~j~0#1|) (< ~q1_back~0 0) (< ~n1~0 (+ ~q1_back~0 1))) (= ~q1~0.offset 0)), Black: 72#(and (<= 0 ~N~0) (= ~t~0 0) (= |thread1Thread1of1ForFork1_~i~0#1| 0)), Black: 396#(<= 1 |thread2Thread1of1ForFork2_~j~0#1|), Black: 74#(and (or (< ~t~0 (+ ~N~0 1)) (< ~t~0 (+ |thread3Thread1of1ForFork0_~k~0#1| ~N~0 1))) (or (< ~N~0 (+ ~t~0 1)) (< (+ |thread3Thread1of1ForFork0_~k~0#1| ~N~0) (+ ~t~0 1)))), Black: 487#(or (< 0 |thread2Thread1of1ForFork2_~j~0#1|) (< ~q1_back~0 0) (< ~n1~0 (+ ~q1_back~0 1))), Black: 574#(and (= ~q1~0.offset 0) (or (< 0 (select (select |#memory_int#1| ~q1~0.base) (* ~q1_front~0 4))) (< ~q1_front~0 0) (< ~q1_back~0 (+ ~q1_front~0 1)) (< ~n1~0 (+ ~q1_back~0 1))) (<= 1 |thread2Thread1of1ForFork2_~j~0#1|)), Black: 576#(and (= ~q1~0.offset 0) (<= 1 |thread2Thread1of1ForFork2_~j~0#1|)), Black: 580#(and (or (not (= |thread2Thread1of1ForFork2_~j~0#1| 0)) (< ~n1~0 (+ ~q1_back~0 1))) (or (< ~q1_front~0 0) (< ~n1~0 (+ ~q1_front~0 2)) (= ~q1_back~0 ~q1_front~0) (< ~n1~0 (+ ~q1_back~0 2))) (or (< 0 |thread2Thread1of1ForFork2_~j~0#1|) (< ~q1_back~0 0) (< ~n1~0 (+ ~q1_back~0 1))) (= ~q1~0.offset 0)), Black: 82#(= ~q1_back~0 ~q1_front~0), 315#true, Black: 1192#(and (= ~n2~0 1) (<= 1 ~q2_back~0)), Black: 1115#(and (<= |ULTIMATE.start_create_fresh_int_array_~i~1#1| 1) (= |ULTIMATE.start_create_fresh_int_array_~size#1| ~n2~0)), Black: 1116#(<= ~n2~0 1), 68#true, 596#true, 14#L70true, 10#L52true, 38#L120-4true, 40#L87-3true, 1112#true, Black: 54#(<= ~q2_back~0 ~q2_front~0), 309#true, Black: 312#(<= ~q2_back~0 (+ 1 ~q2_front~0)), Black: 311#(<= ~q2_back~0 ~q2_front~0)]) [2024-11-13 14:02:51,562 INFO L294 olderBase$Statistics]: this new event has 44 ancestors and is cut-off event [2024-11-13 14:02:51,562 INFO L297 olderBase$Statistics]: existing Event has 40 ancestors and is cut-off event [2024-11-13 14:02:51,562 INFO L297 olderBase$Statistics]: existing Event has 42 ancestors and is cut-off event [2024-11-13 14:02:51,562 INFO L297 olderBase$Statistics]: existing Event has 42 ancestors and is cut-off event [2024-11-13 14:02:51,563 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([711] L94-->L87-2: Formula: (not (= |v_thread3Thread1of1ForFork0_~k~0#1_9| 0)) InVars {thread3Thread1of1ForFork0_~k~0#1=|v_thread3Thread1of1ForFork0_~k~0#1_9|} OutVars{thread3Thread1of1ForFork0_~k~0#1=|v_thread3Thread1of1ForFork0_~k~0#1_9|} AuxVars[] AssignedVars[][460], [Black: 64#(and (= |ULTIMATE.start_create_fresh_int_array_~i~1#1| 0) (= |ULTIMATE.start_create_fresh_int_array_~size#1| ~n2~0)), Black: 835#(and (= ~q1~0.offset 0) (or (< ~q1_front~0 1) (< ~n1~0 (+ ~q1_back~0 1)) (= ~q1_front~0 1)) (= 1 (select (select |#memory_int#1| ~q1~0.base) (* ~q1_front~0 4)))), Black: 680#(= |thread2Thread1of1ForFork2_~j~0#1| 1), 50#true, Black: 582#(and (or (not (= |thread2Thread1of1ForFork2_~j~0#1| 0)) (< ~n1~0 (+ ~q1_back~0 1))) (or (< 0 |thread2Thread1of1ForFork2_~j~0#1|) (< ~q1_back~0 0) (< ~n1~0 (+ ~q1_back~0 1))) (= ~q1~0.offset 0)), Black: 72#(and (<= 0 ~N~0) (= ~t~0 0) (= |thread1Thread1of1ForFork1_~i~0#1| 0)), Black: 396#(<= 1 |thread2Thread1of1ForFork2_~j~0#1|), Black: 74#(and (or (< ~t~0 (+ ~N~0 1)) (< ~t~0 (+ |thread3Thread1of1ForFork0_~k~0#1| ~N~0 1))) (or (< ~N~0 (+ ~t~0 1)) (< (+ |thread3Thread1of1ForFork0_~k~0#1| ~N~0) (+ ~t~0 1)))), Black: 487#(or (< 0 |thread2Thread1of1ForFork2_~j~0#1|) (< ~q1_back~0 0) (< ~n1~0 (+ ~q1_back~0 1))), Black: 574#(and (= ~q1~0.offset 0) (or (< 0 (select (select |#memory_int#1| ~q1~0.base) (* ~q1_front~0 4))) (< ~q1_front~0 0) (< ~q1_back~0 (+ ~q1_front~0 1)) (< ~n1~0 (+ ~q1_back~0 1))) (<= 1 |thread2Thread1of1ForFork2_~j~0#1|)), Black: 576#(and (= ~q1~0.offset 0) (<= 1 |thread2Thread1of1ForFork2_~j~0#1|)), Black: 580#(and (or (not (= |thread2Thread1of1ForFork2_~j~0#1| 0)) (< ~n1~0 (+ ~q1_back~0 1))) (or (< ~q1_front~0 0) (< ~n1~0 (+ ~q1_front~0 2)) (= ~q1_back~0 ~q1_front~0) (< ~n1~0 (+ ~q1_back~0 2))) (or (< 0 |thread2Thread1of1ForFork2_~j~0#1|) (< ~q1_back~0 0) (< ~n1~0 (+ ~q1_back~0 1))) (= ~q1~0.offset 0)), Black: 82#(= ~q1_back~0 ~q1_front~0), 315#true, Black: 1192#(and (= ~n2~0 1) (<= 1 ~q2_back~0)), Black: 1115#(and (<= |ULTIMATE.start_create_fresh_int_array_~i~1#1| 1) (= |ULTIMATE.start_create_fresh_int_array_~size#1| ~n2~0)), Black: 1116#(<= ~n2~0 1), 68#true, 596#true, 14#L70true, 41#L87-2true, 10#L52true, 38#L120-4true, 1112#true, 1703#(and (or (not (= |thread3Thread1of1ForFork0_~k~0#1| 0)) (< ~n2~0 (+ ~q2_back~0 1)) (< ~q2_back~0 0)) (or (not (= 2 ~n2~0)) (< ~q2_front~0 (+ ~q2_back~0 1)))), Black: 54#(<= ~q2_back~0 ~q2_front~0), 309#true, Black: 312#(<= ~q2_back~0 (+ 1 ~q2_front~0)), Black: 311#(<= ~q2_back~0 ~q2_front~0)]) [2024-11-13 14:02:51,563 INFO L294 olderBase$Statistics]: this new event has 44 ancestors and is cut-off event [2024-11-13 14:02:51,563 INFO L297 olderBase$Statistics]: existing Event has 40 ancestors and is cut-off event [2024-11-13 14:02:51,563 INFO L297 olderBase$Statistics]: existing Event has 42 ancestors and is cut-off event [2024-11-13 14:02:51,563 INFO L297 olderBase$Statistics]: existing Event has 42 ancestors and is cut-off event [2024-11-13 14:02:52,173 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([710] L94-->L87-3: Formula: (= |v_thread3Thread1of1ForFork0_~k~0#1_7| 0) InVars {thread3Thread1of1ForFork0_~k~0#1=|v_thread3Thread1of1ForFork0_~k~0#1_7|} OutVars{thread3Thread1of1ForFork0_~k~0#1=|v_thread3Thread1of1ForFork0_~k~0#1_7|} AuxVars[] AssignedVars[][458], [1375#(or (not (= 2 ~n2~0)) (< ~q2_front~0 (+ ~q2_back~0 1))), Black: 64#(and (= |ULTIMATE.start_create_fresh_int_array_~i~1#1| 0) (= |ULTIMATE.start_create_fresh_int_array_~size#1| ~n2~0)), Black: 835#(and (= ~q1~0.offset 0) (or (< ~q1_front~0 1) (< ~n1~0 (+ ~q1_back~0 1)) (= ~q1_front~0 1)) (= 1 (select (select |#memory_int#1| ~q1~0.base) (* ~q1_front~0 4)))), Black: 680#(= |thread2Thread1of1ForFork2_~j~0#1| 1), 50#true, Black: 582#(and (or (not (= |thread2Thread1of1ForFork2_~j~0#1| 0)) (< ~n1~0 (+ ~q1_back~0 1))) (or (< 0 |thread2Thread1of1ForFork2_~j~0#1|) (< ~q1_back~0 0) (< ~n1~0 (+ ~q1_back~0 1))) (= ~q1~0.offset 0)), Black: 72#(and (<= 0 ~N~0) (= ~t~0 0) (= |thread1Thread1of1ForFork1_~i~0#1| 0)), Black: 74#(and (or (< ~t~0 (+ ~N~0 1)) (< ~t~0 (+ |thread3Thread1of1ForFork0_~k~0#1| ~N~0 1))) (or (< ~N~0 (+ ~t~0 1)) (< (+ |thread3Thread1of1ForFork0_~k~0#1| ~N~0) (+ ~t~0 1)))), Black: 396#(<= 1 |thread2Thread1of1ForFork2_~j~0#1|), Black: 487#(or (< 0 |thread2Thread1of1ForFork2_~j~0#1|) (< ~q1_back~0 0) (< ~n1~0 (+ ~q1_back~0 1))), Black: 574#(and (= ~q1~0.offset 0) (or (< 0 (select (select |#memory_int#1| ~q1~0.base) (* ~q1_front~0 4))) (< ~q1_front~0 0) (< ~q1_back~0 (+ ~q1_front~0 1)) (< ~n1~0 (+ ~q1_back~0 1))) (<= 1 |thread2Thread1of1ForFork2_~j~0#1|)), Black: 576#(and (= ~q1~0.offset 0) (<= 1 |thread2Thread1of1ForFork2_~j~0#1|)), Black: 580#(and (or (not (= |thread2Thread1of1ForFork2_~j~0#1| 0)) (< ~n1~0 (+ ~q1_back~0 1))) (or (< ~q1_front~0 0) (< ~n1~0 (+ ~q1_front~0 2)) (= ~q1_back~0 ~q1_front~0) (< ~n1~0 (+ ~q1_back~0 2))) (or (< 0 |thread2Thread1of1ForFork2_~j~0#1|) (< ~q1_back~0 0) (< ~n1~0 (+ ~q1_back~0 1))) (= ~q1~0.offset 0)), Black: 82#(= ~q1_back~0 ~q1_front~0), 315#true, Black: 1192#(and (= ~n2~0 1) (<= 1 ~q2_back~0)), Black: 1115#(and (<= |ULTIMATE.start_create_fresh_int_array_~i~1#1| 1) (= |ULTIMATE.start_create_fresh_int_array_~size#1| ~n2~0)), Black: 1116#(<= ~n2~0 1), 68#true, 596#true, 14#L70true, 10#L52true, 40#L87-3true, 34#L121true, 1112#true, Black: 54#(<= ~q2_back~0 ~q2_front~0), 309#true, Black: 312#(<= ~q2_back~0 (+ 1 ~q2_front~0)), Black: 311#(<= ~q2_back~0 ~q2_front~0)]) [2024-11-13 14:02:52,174 INFO L294 olderBase$Statistics]: this new event has 45 ancestors and is cut-off event [2024-11-13 14:02:52,174 INFO L297 olderBase$Statistics]: existing Event has 43 ancestors and is cut-off event [2024-11-13 14:02:52,174 INFO L297 olderBase$Statistics]: existing Event has 41 ancestors and is cut-off event [2024-11-13 14:02:52,174 INFO L297 olderBase$Statistics]: existing Event has 43 ancestors and is cut-off event [2024-11-13 14:02:52,174 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([711] L94-->L87-2: Formula: (not (= |v_thread3Thread1of1ForFork0_~k~0#1_9| 0)) InVars {thread3Thread1of1ForFork0_~k~0#1=|v_thread3Thread1of1ForFork0_~k~0#1_9|} OutVars{thread3Thread1of1ForFork0_~k~0#1=|v_thread3Thread1of1ForFork0_~k~0#1_9|} AuxVars[] AssignedVars[][460], [Black: 64#(and (= |ULTIMATE.start_create_fresh_int_array_~i~1#1| 0) (= |ULTIMATE.start_create_fresh_int_array_~size#1| ~n2~0)), Black: 835#(and (= ~q1~0.offset 0) (or (< ~q1_front~0 1) (< ~n1~0 (+ ~q1_back~0 1)) (= ~q1_front~0 1)) (= 1 (select (select |#memory_int#1| ~q1~0.base) (* ~q1_front~0 4)))), Black: 680#(= |thread2Thread1of1ForFork2_~j~0#1| 1), 50#true, Black: 582#(and (or (not (= |thread2Thread1of1ForFork2_~j~0#1| 0)) (< ~n1~0 (+ ~q1_back~0 1))) (or (< 0 |thread2Thread1of1ForFork2_~j~0#1|) (< ~q1_back~0 0) (< ~n1~0 (+ ~q1_back~0 1))) (= ~q1~0.offset 0)), Black: 72#(and (<= 0 ~N~0) (= ~t~0 0) (= |thread1Thread1of1ForFork1_~i~0#1| 0)), Black: 396#(<= 1 |thread2Thread1of1ForFork2_~j~0#1|), Black: 74#(and (or (< ~t~0 (+ ~N~0 1)) (< ~t~0 (+ |thread3Thread1of1ForFork0_~k~0#1| ~N~0 1))) (or (< ~N~0 (+ ~t~0 1)) (< (+ |thread3Thread1of1ForFork0_~k~0#1| ~N~0) (+ ~t~0 1)))), Black: 487#(or (< 0 |thread2Thread1of1ForFork2_~j~0#1|) (< ~q1_back~0 0) (< ~n1~0 (+ ~q1_back~0 1))), Black: 574#(and (= ~q1~0.offset 0) (or (< 0 (select (select |#memory_int#1| ~q1~0.base) (* ~q1_front~0 4))) (< ~q1_front~0 0) (< ~q1_back~0 (+ ~q1_front~0 1)) (< ~n1~0 (+ ~q1_back~0 1))) (<= 1 |thread2Thread1of1ForFork2_~j~0#1|)), Black: 576#(and (= ~q1~0.offset 0) (<= 1 |thread2Thread1of1ForFork2_~j~0#1|)), Black: 580#(and (or (not (= |thread2Thread1of1ForFork2_~j~0#1| 0)) (< ~n1~0 (+ ~q1_back~0 1))) (or (< ~q1_front~0 0) (< ~n1~0 (+ ~q1_front~0 2)) (= ~q1_back~0 ~q1_front~0) (< ~n1~0 (+ ~q1_back~0 2))) (or (< 0 |thread2Thread1of1ForFork2_~j~0#1|) (< ~q1_back~0 0) (< ~n1~0 (+ ~q1_back~0 1))) (= ~q1~0.offset 0)), Black: 82#(= ~q1_back~0 ~q1_front~0), 315#true, Black: 1192#(and (= ~n2~0 1) (<= 1 ~q2_back~0)), Black: 1115#(and (<= |ULTIMATE.start_create_fresh_int_array_~i~1#1| 1) (= |ULTIMATE.start_create_fresh_int_array_~size#1| ~n2~0)), Black: 1116#(<= ~n2~0 1), 68#true, 596#true, 14#L70true, 41#L87-2true, 10#L52true, 34#L121true, 1112#true, 1703#(and (or (not (= |thread3Thread1of1ForFork0_~k~0#1| 0)) (< ~n2~0 (+ ~q2_back~0 1)) (< ~q2_back~0 0)) (or (not (= 2 ~n2~0)) (< ~q2_front~0 (+ ~q2_back~0 1)))), Black: 54#(<= ~q2_back~0 ~q2_front~0), 309#true, Black: 312#(<= ~q2_back~0 (+ 1 ~q2_front~0)), Black: 311#(<= ~q2_back~0 ~q2_front~0)]) [2024-11-13 14:02:52,174 INFO L294 olderBase$Statistics]: this new event has 45 ancestors and is cut-off event [2024-11-13 14:02:52,174 INFO L297 olderBase$Statistics]: existing Event has 43 ancestors and is cut-off event [2024-11-13 14:02:52,174 INFO L297 olderBase$Statistics]: existing Event has 41 ancestors and is cut-off event [2024-11-13 14:02:52,174 INFO L297 olderBase$Statistics]: existing Event has 43 ancestors and is cut-off event [2024-11-13 14:02:56,154 INFO L124 PetriNetUnfolderBase]: 75912/121747 cut-off events. [2024-11-13 14:02:56,154 INFO L125 PetriNetUnfolderBase]: For 259149/259703 co-relation queries the response was YES. [2024-11-13 14:02:56,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367138 conditions, 121747 events. 75912/121747 cut-off events. For 259149/259703 co-relation queries the response was YES. Maximal size of possible extension queue 3549. Compared 1032736 event pairs, 5613 based on Foata normal form. 4517/125911 useless extension candidates. Maximal degree in co-relation 367112. Up to 13990 conditions per place. [2024-11-13 14:02:57,308 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 1347 selfloop transitions, 179 changer transitions 230/1765 dead transitions. [2024-11-13 14:02:57,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 1765 transitions, 13113 flow [2024-11-13 14:02:57,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-13 14:02:57,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-11-13 14:02:57,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 842 transitions. [2024-11-13 14:02:57,313 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49067599067599066 [2024-11-13 14:02:57,313 INFO L175 Difference]: Start difference. First operand has 106 places, 145 transitions, 826 flow. Second operand 39 states and 842 transitions. [2024-11-13 14:02:57,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 1765 transitions, 13113 flow [2024-11-13 14:03:07,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 1765 transitions, 13073 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-11-13 14:03:07,330 INFO L231 Difference]: Finished difference. Result has 166 places, 316 transitions, 2989 flow [2024-11-13 14:03:07,331 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2989, PETRI_PLACES=166, PETRI_TRANSITIONS=316} [2024-11-13 14:03:07,331 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-11-13 14:03:07,331 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 316 transitions, 2989 flow [2024-11-13 14:03:07,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 12.172413793103448) internal successors, (353), 29 states have internal predecessors, (353), 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) [2024-11-13 14:03:07,331 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:03:07,332 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:03:07,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-13 14:03:07,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-13 14:03:07,532 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-13 14:03:07,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:03:07,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1008144187, now seen corresponding path program 3 times [2024-11-13 14:03:07,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:03:07,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642450632] [2024-11-13 14:03:07,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:03:07,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:03:07,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:03:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:03:08,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:03:08,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642450632] [2024-11-13 14:03:08,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642450632] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:03:08,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024714740] [2024-11-13 14:03:08,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:03:08,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:03:08,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:03:08,153 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:03:08,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90b7057-0e38-4b30-b98c-3c9cc626998a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 14:03:08,305 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 14:03:08,305 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:03:08,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 14:03:08,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:03:08,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:03:08,602 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 15 [2024-11-13 14:03:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:03:08,782 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:03:08,993 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 14:03:08,993 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 24 treesize of output 11 [2024-11-13 14:03:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:03:09,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024714740] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:03:09,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:03:09,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2024-11-13 14:03:09,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141981347] [2024-11-13 14:03:09,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:03:09,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 14:03:09,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:03:09,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 14:03:09,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2024-11-13 14:03:09,542 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-13 14:03:09,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 316 transitions, 2989 flow. Second operand has 28 states, 28 states have (on average 12.214285714285714) internal successors, (342), 28 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) [2024-11-13 14:03:09,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:03:09,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-13 14:03:09,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand