./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/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_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/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_ef051824-b808-4eae-9bd2-5b9fd2616357/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 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 14:25:24,811 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 14:25:24,909 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 14:25:24,915 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 14:25:24,916 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 14:25:24,944 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 14:25:24,945 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 14:25:24,945 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 14:25:24,946 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 14:25:24,946 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 14:25:24,946 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 14:25:24,947 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 14:25:24,947 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 14:25:24,947 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 14:25:24,947 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 14:25:24,948 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 14:25:24,948 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 14:25:24,948 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 14:25:24,948 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 14:25:24,948 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 14:25:24,949 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 14:25:24,949 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 14:25:24,949 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 14:25:24,949 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 14:25:24,949 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 14:25:24,949 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 14:25:24,950 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 14:25:24,950 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 14:25:24,950 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 14:25:24,950 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 14:25:24,950 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 14:25:24,950 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 14:25:24,950 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:25:24,951 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 14:25:24,951 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 14:25:24,951 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 14:25:24,951 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 14:25:24,951 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 14:25:24,951 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 14:25:24,951 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 14:25:24,951 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 14:25:24,951 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 14:25:24,952 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_ef051824-b808-4eae-9bd2-5b9fd2616357/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 -> 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 [2024-11-13 14:25:25,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 14:25:25,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 14:25:25,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 14:25:25,366 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 14:25:25,366 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 14:25:25,368 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c Unable to find full path for "g++" [2024-11-13 14:25:27,487 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 14:25:27,915 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 14:25:27,916 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2024-11-13 14:25:27,961 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/data/9533537f2/f5c6a7a388a1495ba1b66d577e174f2a/FLAG33f23881a [2024-11-13 14:25:28,010 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/data/9533537f2/f5c6a7a388a1495ba1b66d577e174f2a [2024-11-13 14:25:28,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 14:25:28,017 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 14:25:28,019 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 14:25:28,019 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 14:25:28,026 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 14:25:28,027 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:25:28" (1/1) ... [2024-11-13 14:25:28,028 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5404f2c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:28, skipping insertion in model container [2024-11-13 14:25:28,030 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:25:28" (1/1) ... [2024-11-13 14:25:28,058 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 14:25:28,257 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_ef051824-b808-4eae-9bd2-5b9fd2616357/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3146,3159] [2024-11-13 14:25:28,272 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:25:28,296 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 14:25:28,338 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_ef051824-b808-4eae-9bd2-5b9fd2616357/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3146,3159] [2024-11-13 14:25:28,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:25:28,371 INFO L204 MainTranslator]: Completed translation [2024-11-13 14:25:28,372 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:28 WrapperNode [2024-11-13 14:25:28,372 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 14:25:28,375 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 14:25:28,376 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 14:25:28,376 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 14:25:28,385 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:28" (1/1) ... [2024-11-13 14:25:28,400 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:28" (1/1) ... [2024-11-13 14:25:28,442 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 145 [2024-11-13 14:25:28,442 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 14:25:28,443 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 14:25:28,443 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 14:25:28,443 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 14:25:28,457 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:28" (1/1) ... [2024-11-13 14:25:28,458 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:28" (1/1) ... [2024-11-13 14:25:28,460 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:28" (1/1) ... [2024-11-13 14:25:28,489 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-13 14:25:28,491 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:28" (1/1) ... [2024-11-13 14:25:28,492 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:28" (1/1) ... [2024-11-13 14:25:28,504 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:28" (1/1) ... [2024-11-13 14:25:28,512 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:28" (1/1) ... [2024-11-13 14:25:28,517 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:28" (1/1) ... [2024-11-13 14:25:28,519 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:28" (1/1) ... [2024-11-13 14:25:28,523 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 14:25:28,526 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 14:25:28,527 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 14:25:28,527 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 14:25:28,529 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:28" (1/1) ... [2024-11-13 14:25:28,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:25:28,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:28,573 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 14:25:28,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 14:25:28,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 14:25:28,618 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 14:25:28,618 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 14:25:28,618 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 14:25:28,618 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 14:25:28,618 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-13 14:25:28,618 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-13 14:25:28,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 14:25:28,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 14:25:28,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 14:25:28,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 14:25:28,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-13 14:25:28,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-13 14:25:28,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 14:25:28,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 14:25:28,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 14:25:28,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 14:25:28,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 14:25:28,621 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 14:25:28,745 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 14:25:28,748 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 14:25:29,109 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 14:25:29,109 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 14:25:29,346 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 14:25:29,346 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 14:25:29,347 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:25:29 BoogieIcfgContainer [2024-11-13 14:25:29,347 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 14:25:29,350 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 14:25:29,350 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 14:25:29,355 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 14:25:29,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:25:28" (1/3) ... [2024-11-13 14:25:29,356 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237adb70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:25:29, skipping insertion in model container [2024-11-13 14:25:29,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:28" (2/3) ... [2024-11-13 14:25:29,361 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237adb70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:25:29, skipping insertion in model container [2024-11-13 14:25:29,361 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:25:29" (3/3) ... [2024-11-13 14:25:29,363 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2024-11-13 14:25:29,380 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 14:25:29,382 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-send-receive.wvr.c that has 4 procedures, 33 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-13 14:25:29,382 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 14:25:29,469 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-13 14:25:29,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 36 transitions, 93 flow [2024-11-13 14:25:29,567 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2024-11-13 14:25:29,572 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-13 14:25:29,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 33 events. 4/33 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 56 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2024-11-13 14:25:29,579 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 36 transitions, 93 flow [2024-11-13 14:25:29,585 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 32 transitions, 82 flow [2024-11-13 14:25:29,597 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 14:25:29,617 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;@2890e89c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 14:25:29,617 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-13 14:25:29,634 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 14:25:29,634 INFO L124 PetriNetUnfolderBase]: 4/31 cut-off events. [2024-11-13 14:25:29,634 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-13 14:25:29,635 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:25:29,635 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] [2024-11-13 14:25:29,636 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 14:25:29,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:29,641 INFO L85 PathProgramCache]: Analyzing trace with hash -598783449, now seen corresponding path program 1 times [2024-11-13 14:25:29,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:29,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043287530] [2024-11-13 14:25:29,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:29,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:30,546 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 14:25:30,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:30,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043287530] [2024-11-13 14:25:30,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043287530] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:25:30,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:25:30,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:25:30,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80534978] [2024-11-13 14:25:30,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:25:30,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:25:30,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:30,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:25:30,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:25:30,668 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 36 [2024-11-13 14:25:30,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:25:30,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:25:30,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 36 [2024-11-13 14:25:30,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:25:31,150 INFO L124 PetriNetUnfolderBase]: 487/825 cut-off events. [2024-11-13 14:25:31,151 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-13 14:25:31,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622 conditions, 825 events. 487/825 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3954 event pairs, 54 based on Foata normal form. 84/857 useless extension candidates. Maximal degree in co-relation 1551. Up to 280 conditions per place. [2024-11-13 14:25:31,168 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 53 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-11-13 14:25:31,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 66 transitions, 276 flow [2024-11-13 14:25:31,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:25:31,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:25:31,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-11-13 14:25:31,188 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-11-13 14:25:31,191 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 82 flow. Second operand 5 states and 119 transitions. [2024-11-13 14:25:31,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 66 transitions, 276 flow [2024-11-13 14:25:31,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 66 transitions, 256 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-13 14:25:31,210 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 94 flow [2024-11-13 14:25:31,214 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-11-13 14:25:31,220 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2024-11-13 14:25:31,220 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 94 flow [2024-11-13 14:25:31,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:25:31,221 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:25:31,221 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 14:25:31,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 14:25:31,222 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 14:25:31,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:31,223 INFO L85 PathProgramCache]: Analyzing trace with hash -117469249, now seen corresponding path program 1 times [2024-11-13 14:25:31,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:31,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016812383] [2024-11-13 14:25:31,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:31,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:31,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:31,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016812383] [2024-11-13 14:25:31,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016812383] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:25:31,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:25:31,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:25:31,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106333951] [2024-11-13 14:25:31,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:25:31,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:25:31,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:31,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:25:31,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:25:31,365 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-11-13 14:25:31,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 14:25:31,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:25:31,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-11-13 14:25:31,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:25:31,524 INFO L124 PetriNetUnfolderBase]: 190/380 cut-off events. [2024-11-13 14:25:31,524 INFO L125 PetriNetUnfolderBase]: For 345/439 co-relation queries the response was YES. [2024-11-13 14:25:31,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 804 conditions, 380 events. 190/380 cut-off events. For 345/439 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1596 event pairs, 61 based on Foata normal form. 110/441 useless extension candidates. Maximal degree in co-relation 254. Up to 240 conditions per place. [2024-11-13 14:25:31,529 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 24 selfloop transitions, 3 changer transitions 2/42 dead transitions. [2024-11-13 14:25:31,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 42 transitions, 169 flow [2024-11-13 14:25:31,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:25:31,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 14:25:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-11-13 14:25:31,536 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-11-13 14:25:31,536 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 94 flow. Second operand 3 states and 74 transitions. [2024-11-13 14:25:31,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 42 transitions, 169 flow [2024-11-13 14:25:31,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 42 transitions, 165 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 14:25:31,542 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 109 flow [2024-11-13 14:25:31,543 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2024-11-13 14:25:31,544 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2024-11-13 14:25:31,544 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 109 flow [2024-11-13 14:25:31,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 14:25:31,544 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:25:31,544 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] [2024-11-13 14:25:31,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 14:25:31,545 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 14:25:31,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:31,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1345062879, now seen corresponding path program 1 times [2024-11-13 14:25:31,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:31,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82133547] [2024-11-13 14:25:31,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:31,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:25:31,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:31,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82133547] [2024-11-13 14:25:31,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82133547] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:25:31,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:25:31,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:25:31,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65018630] [2024-11-13 14:25:31,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:25:31,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:25:31,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:31,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:25:31,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:25:31,914 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-11-13 14:25:31,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 109 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:25:31,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:25:31,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-11-13 14:25:31,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:25:32,090 INFO L124 PetriNetUnfolderBase]: 203/405 cut-off events. [2024-11-13 14:25:32,091 INFO L125 PetriNetUnfolderBase]: For 407/542 co-relation queries the response was YES. [2024-11-13 14:25:32,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 405 events. 203/405 cut-off events. For 407/542 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1713 event pairs, 122 based on Foata normal form. 125/474 useless extension candidates. Maximal degree in co-relation 702. Up to 288 conditions per place. [2024-11-13 14:25:32,095 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 22 selfloop transitions, 2 changer transitions 10/47 dead transitions. [2024-11-13 14:25:32,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 202 flow [2024-11-13 14:25:32,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:25:32,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 14:25:32,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-11-13 14:25:32,098 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-11-13 14:25:32,098 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 109 flow. Second operand 4 states and 92 transitions. [2024-11-13 14:25:32,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 202 flow [2024-11-13 14:25:32,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 14:25:32,103 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 120 flow [2024-11-13 14:25:32,104 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2024-11-13 14:25:32,105 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2024-11-13 14:25:32,107 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 120 flow [2024-11-13 14:25:32,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:25:32,107 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:25:32,108 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] [2024-11-13 14:25:32,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 14:25:32,108 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 14:25:32,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:32,109 INFO L85 PathProgramCache]: Analyzing trace with hash 729587477, now seen corresponding path program 1 times [2024-11-13 14:25:32,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:32,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123592373] [2024-11-13 14:25:32,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:32,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 14:25:32,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:32,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123592373] [2024-11-13 14:25:32,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123592373] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:25:32,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:25:32,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:25:32,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841306650] [2024-11-13 14:25:32,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:25:32,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:25:32,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:32,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:25:32,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:25:32,609 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 36 [2024-11-13 14:25:32,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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 14:25:32,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:25:32,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 36 [2024-11-13 14:25:32,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:25:32,976 INFO L124 PetriNetUnfolderBase]: 481/883 cut-off events. [2024-11-13 14:25:32,977 INFO L125 PetriNetUnfolderBase]: For 730/918 co-relation queries the response was YES. [2024-11-13 14:25:32,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2142 conditions, 883 events. 481/883 cut-off events. For 730/918 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4045 event pairs, 52 based on Foata normal form. 218/1072 useless extension candidates. Maximal degree in co-relation 2126. Up to 307 conditions per place. [2024-11-13 14:25:32,984 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 40 selfloop transitions, 4 changer transitions 12/65 dead transitions. [2024-11-13 14:25:32,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 65 transitions, 331 flow [2024-11-13 14:25:32,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:25:32,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:25:32,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-11-13 14:25:32,985 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-13 14:25:32,986 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 120 flow. Second operand 5 states and 108 transitions. [2024-11-13 14:25:32,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 65 transitions, 331 flow [2024-11-13 14:25:32,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 65 transitions, 321 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-13 14:25:32,992 INFO L231 Difference]: Finished difference. Result has 47 places, 37 transitions, 132 flow [2024-11-13 14:25:32,992 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2024-11-13 14:25:32,993 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 9 predicate places. [2024-11-13 14:25:32,993 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 132 flow [2024-11-13 14:25:32,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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 14:25:32,994 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:25:32,994 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] [2024-11-13 14:25:32,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 14:25:32,995 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 14:25:32,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:32,995 INFO L85 PathProgramCache]: Analyzing trace with hash -137155405, now seen corresponding path program 2 times [2024-11-13 14:25:32,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:32,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980505193] [2024-11-13 14:25:32,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:32,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:33,343 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 14:25:33,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:33,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980505193] [2024-11-13 14:25:33,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980505193] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:25:33,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94925399] [2024-11-13 14:25:33,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:25:33,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:33,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:33,349 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:25:33,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 14:25:33,483 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:25:33,483 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:25:33,486 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 14:25:33,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:25:33,905 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 14:25:33,905 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:25:34,107 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 14:25:34,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94925399] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:25:34,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:25:34,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 9 [2024-11-13 14:25:34,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350706233] [2024-11-13 14:25:34,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:25:34,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 14:25:34,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:34,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 14:25:34,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-13 14:25:34,130 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-11-13 14:25:34,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 37 transitions, 132 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 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 14:25:34,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:25:34,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-11-13 14:25:34,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:25:34,762 INFO L124 PetriNetUnfolderBase]: 658/1070 cut-off events. [2024-11-13 14:25:34,762 INFO L125 PetriNetUnfolderBase]: For 724/724 co-relation queries the response was YES. [2024-11-13 14:25:34,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2764 conditions, 1070 events. 658/1070 cut-off events. For 724/724 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4245 event pairs, 35 based on Foata normal form. 76/1120 useless extension candidates. Maximal degree in co-relation 2741. Up to 257 conditions per place. [2024-11-13 14:25:34,770 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 77 selfloop transitions, 13 changer transitions 17/113 dead transitions. [2024-11-13 14:25:34,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 113 transitions, 586 flow [2024-11-13 14:25:34,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 14:25:34,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-13 14:25:34,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 224 transitions. [2024-11-13 14:25:34,773 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47863247863247865 [2024-11-13 14:25:34,773 INFO L175 Difference]: Start difference. First operand has 47 places, 37 transitions, 132 flow. Second operand 13 states and 224 transitions. [2024-11-13 14:25:34,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 113 transitions, 586 flow [2024-11-13 14:25:34,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 113 transitions, 580 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 14:25:34,778 INFO L231 Difference]: Finished difference. Result has 64 places, 45 transitions, 225 flow [2024-11-13 14:25:34,778 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=225, PETRI_PLACES=64, PETRI_TRANSITIONS=45} [2024-11-13 14:25:34,779 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2024-11-13 14:25:34,779 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 45 transitions, 225 flow [2024-11-13 14:25:34,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 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 14:25:34,779 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:25:34,780 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] [2024-11-13 14:25:34,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 14:25:34,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:34,980 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 14:25:34,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:34,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1009271227, now seen corresponding path program 3 times [2024-11-13 14:25:34,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:34,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772609769] [2024-11-13 14:25:34,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:34,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:35,277 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 14:25:35,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:35,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772609769] [2024-11-13 14:25:35,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772609769] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:25:35,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516343844] [2024-11-13 14:25:35,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:25:35,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:35,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:35,281 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:25:35,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 14:25:35,407 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 14:25:35,408 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:25:35,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 14:25:35,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:25:35,516 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 14:25:35,516 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:25:35,632 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 14:25:35,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516343844] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:25:35,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:25:35,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 9 [2024-11-13 14:25:35,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990552065] [2024-11-13 14:25:35,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:25:35,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 14:25:35,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:35,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 14:25:35,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-13 14:25:35,669 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-11-13 14:25:35,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 45 transitions, 225 flow. Second operand has 9 states, 9 states have (on average 15.11111111111111) internal successors, (136), 9 states have internal predecessors, (136), 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 14:25:35,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:25:35,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-11-13 14:25:35,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:25:36,093 INFO L124 PetriNetUnfolderBase]: 450/756 cut-off events. [2024-11-13 14:25:36,093 INFO L125 PetriNetUnfolderBase]: For 1322/1322 co-relation queries the response was YES. [2024-11-13 14:25:36,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2409 conditions, 756 events. 450/756 cut-off events. For 1322/1322 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2848 event pairs, 27 based on Foata normal form. 20/750 useless extension candidates. Maximal degree in co-relation 2378. Up to 257 conditions per place. [2024-11-13 14:25:36,101 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 65 selfloop transitions, 10 changer transitions 0/81 dead transitions. [2024-11-13 14:25:36,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 81 transitions, 492 flow [2024-11-13 14:25:36,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 14:25:36,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 14:25:36,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-11-13 14:25:36,103 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2024-11-13 14:25:36,103 INFO L175 Difference]: Start difference. First operand has 64 places, 45 transitions, 225 flow. Second operand 9 states and 152 transitions. [2024-11-13 14:25:36,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 81 transitions, 492 flow [2024-11-13 14:25:36,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 81 transitions, 472 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-13 14:25:36,112 INFO L231 Difference]: Finished difference. Result has 64 places, 42 transitions, 205 flow [2024-11-13 14:25:36,112 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=205, PETRI_PLACES=64, PETRI_TRANSITIONS=42} [2024-11-13 14:25:36,113 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2024-11-13 14:25:36,113 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 42 transitions, 205 flow [2024-11-13 14:25:36,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.11111111111111) internal successors, (136), 9 states have internal predecessors, (136), 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 14:25:36,117 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:25:36,117 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] [2024-11-13 14:25:36,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 14:25:36,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:36,318 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 14:25:36,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:36,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1629461095, now seen corresponding path program 4 times [2024-11-13 14:25:36,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:36,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352936591] [2024-11-13 14:25:36,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:36,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:37,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:37,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352936591] [2024-11-13 14:25:37,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352936591] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:25:37,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706082851] [2024-11-13 14:25:37,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:25:37,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:37,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:37,141 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:25:37,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 14:25:37,249 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:25:37,249 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:25:37,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-13 14:25:37,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:25:37,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-13 14:25:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:37,853 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:25:39,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2024-11-13 14:25:39,033 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:25:39,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2024-11-13 14:25:39,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:39,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706082851] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:25:39,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:25:39,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 28 [2024-11-13 14:25:39,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698074314] [2024-11-13 14:25:39,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:25:39,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-13 14:25:39,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:39,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-13 14:25:39,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2024-11-13 14:25:39,437 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-11-13 14:25:39,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 42 transitions, 205 flow. Second operand has 29 states, 29 states have (on average 11.206896551724139) internal successors, (325), 29 states have internal predecessors, (325), 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 14:25:39,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:25:39,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-11-13 14:25:39,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:25:43,033 INFO L124 PetriNetUnfolderBase]: 2202/3849 cut-off events. [2024-11-13 14:25:43,033 INFO L125 PetriNetUnfolderBase]: For 7436/7488 co-relation queries the response was YES. [2024-11-13 14:25:43,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11968 conditions, 3849 events. 2202/3849 cut-off events. For 7436/7488 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 22926 event pairs, 260 based on Foata normal form. 172/3802 useless extension candidates. Maximal degree in co-relation 7369. Up to 669 conditions per place. [2024-11-13 14:25:43,064 INFO L140 encePairwiseOnDemand]: 23/36 looper letters, 167 selfloop transitions, 63 changer transitions 48/287 dead transitions. [2024-11-13 14:25:43,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 287 transitions, 1789 flow [2024-11-13 14:25:43,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-13 14:25:43,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-13 14:25:43,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 545 transitions. [2024-11-13 14:25:43,069 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4883512544802867 [2024-11-13 14:25:43,069 INFO L175 Difference]: Start difference. First operand has 64 places, 42 transitions, 205 flow. Second operand 31 states and 545 transitions. [2024-11-13 14:25:43,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 287 transitions, 1789 flow [2024-11-13 14:25:43,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 287 transitions, 1723 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-13 14:25:43,098 INFO L231 Difference]: Finished difference. Result has 99 places, 109 transitions, 732 flow [2024-11-13 14:25:43,102 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=732, PETRI_PLACES=99, PETRI_TRANSITIONS=109} [2024-11-13 14:25:43,102 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 61 predicate places. [2024-11-13 14:25:43,103 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 109 transitions, 732 flow [2024-11-13 14:25:43,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 11.206896551724139) internal successors, (325), 29 states have internal predecessors, (325), 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 14:25:43,107 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:25:43,107 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] [2024-11-13 14:25:43,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 14:25:43,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:43,308 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 14:25:43,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:43,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1355984131, now seen corresponding path program 1 times [2024-11-13 14:25:43,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:43,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166082934] [2024-11-13 14:25:43,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:43,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:43,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:25:43,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:43,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166082934] [2024-11-13 14:25:43,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166082934] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:25:43,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:25:43,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:25:43,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236127738] [2024-11-13 14:25:43,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:25:43,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:25:43,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:43,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:25:43,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:25:43,419 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 36 [2024-11-13 14:25:43,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 109 transitions, 732 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:25:43,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:25:43,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 36 [2024-11-13 14:25:43,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:25:43,839 INFO L124 PetriNetUnfolderBase]: 929/1773 cut-off events. [2024-11-13 14:25:43,840 INFO L125 PetriNetUnfolderBase]: For 7209/7296 co-relation queries the response was YES. [2024-11-13 14:25:43,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6598 conditions, 1773 events. 929/1773 cut-off events. For 7209/7296 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9934 event pairs, 373 based on Foata normal form. 55/1740 useless extension candidates. Maximal degree in co-relation 5545. Up to 1242 conditions per place. [2024-11-13 14:25:43,862 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 96 selfloop transitions, 3 changer transitions 0/124 dead transitions. [2024-11-13 14:25:43,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 124 transitions, 1029 flow [2024-11-13 14:25:43,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:25:43,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 14:25:43,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-11-13 14:25:43,863 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-13 14:25:43,863 INFO L175 Difference]: Start difference. First operand has 99 places, 109 transitions, 732 flow. Second operand 3 states and 72 transitions. [2024-11-13 14:25:43,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 124 transitions, 1029 flow [2024-11-13 14:25:43,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 124 transitions, 896 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-11-13 14:25:43,904 INFO L231 Difference]: Finished difference. Result has 96 places, 107 transitions, 614 flow [2024-11-13 14:25:43,907 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=614, PETRI_PLACES=96, PETRI_TRANSITIONS=107} [2024-11-13 14:25:43,907 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 58 predicate places. [2024-11-13 14:25:43,908 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 107 transitions, 614 flow [2024-11-13 14:25:43,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:25:43,908 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:25:43,908 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] [2024-11-13 14:25:43,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 14:25:43,908 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 14:25:43,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:43,909 INFO L85 PathProgramCache]: Analyzing trace with hash -281791627, now seen corresponding path program 5 times [2024-11-13 14:25:43,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:43,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950430841] [2024-11-13 14:25:43,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:43,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:45,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:45,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950430841] [2024-11-13 14:25:45,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950430841] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:25:45,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510860287] [2024-11-13 14:25:45,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 14:25:45,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:45,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:45,681 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:25:45,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 14:25:45,813 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-13 14:25:45,813 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:25:45,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 14:25:45,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:25:46,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:25:46,145 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:25:46,304 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:25:46,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2024-11-13 14:25:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 14:25:46,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510860287] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:25:46,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:25:46,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 25 [2024-11-13 14:25:46,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643684761] [2024-11-13 14:25:46,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:25:46,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-13 14:25:46,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:46,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-13 14:25:46,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2024-11-13 14:25:46,700 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 36 [2024-11-13 14:25:46,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 107 transitions, 614 flow. Second operand has 26 states, 26 states have (on average 8.807692307692308) internal successors, (229), 26 states have internal predecessors, (229), 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 14:25:46,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:25:46,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 36 [2024-11-13 14:25:46,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:25:50,050 INFO L124 PetriNetUnfolderBase]: 3874/6017 cut-off events. [2024-11-13 14:25:50,051 INFO L125 PetriNetUnfolderBase]: For 12969/12969 co-relation queries the response was YES. [2024-11-13 14:25:50,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21221 conditions, 6017 events. 3874/6017 cut-off events. For 12969/12969 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 31455 event pairs, 150 based on Foata normal form. 104/6116 useless extension candidates. Maximal degree in co-relation 18882. Up to 1155 conditions per place. [2024-11-13 14:25:50,116 INFO L140 encePairwiseOnDemand]: 20/36 looper letters, 223 selfloop transitions, 113 changer transitions 29/368 dead transitions. [2024-11-13 14:25:50,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 368 transitions, 2607 flow [2024-11-13 14:25:50,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-13 14:25:50,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-13 14:25:50,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 457 transitions. [2024-11-13 14:25:50,120 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37336601307189543 [2024-11-13 14:25:50,120 INFO L175 Difference]: Start difference. First operand has 96 places, 107 transitions, 614 flow. Second operand 34 states and 457 transitions. [2024-11-13 14:25:50,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 368 transitions, 2607 flow [2024-11-13 14:25:50,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 368 transitions, 2593 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 14:25:50,180 INFO L231 Difference]: Finished difference. Result has 139 places, 168 transitions, 1359 flow [2024-11-13 14:25:50,181 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1359, PETRI_PLACES=139, PETRI_TRANSITIONS=168} [2024-11-13 14:25:50,181 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 101 predicate places. [2024-11-13 14:25:50,182 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 168 transitions, 1359 flow [2024-11-13 14:25:50,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.807692307692308) internal successors, (229), 26 states have internal predecessors, (229), 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 14:25:50,182 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:25:50,182 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:25:50,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 14:25:50,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:50,383 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 14:25:50,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:50,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1501125143, now seen corresponding path program 6 times [2024-11-13 14:25:50,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:50,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323678896] [2024-11-13 14:25:50,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:50,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:50,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:25:50,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:50,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323678896] [2024-11-13 14:25:50,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323678896] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:25:50,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:25:50,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:25:50,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296949382] [2024-11-13 14:25:50,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:25:50,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:25:50,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:50,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:25:50,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:25:50,521 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-11-13 14:25:50,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 168 transitions, 1359 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:25:50,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:25:50,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-11-13 14:25:50,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:25:51,293 INFO L124 PetriNetUnfolderBase]: 1588/3353 cut-off events. [2024-11-13 14:25:51,293 INFO L125 PetriNetUnfolderBase]: For 23735/23922 co-relation queries the response was YES. [2024-11-13 14:25:51,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15298 conditions, 3353 events. 1588/3353 cut-off events. For 23735/23922 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 22837 event pairs, 319 based on Foata normal form. 192/3329 useless extension candidates. Maximal degree in co-relation 12307. Up to 1212 conditions per place. [2024-11-13 14:25:51,356 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 114 selfloop transitions, 56 changer transitions 0/236 dead transitions. [2024-11-13 14:25:51,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 236 transitions, 2238 flow [2024-11-13 14:25:51,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:25:51,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 14:25:51,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-11-13 14:25:51,357 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7361111111111112 [2024-11-13 14:25:51,358 INFO L175 Difference]: Start difference. First operand has 139 places, 168 transitions, 1359 flow. Second operand 4 states and 106 transitions. [2024-11-13 14:25:51,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 236 transitions, 2238 flow [2024-11-13 14:25:51,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 236 transitions, 2081 flow, removed 30 selfloop flow, removed 11 redundant places. [2024-11-13 14:25:51,434 INFO L231 Difference]: Finished difference. Result has 133 places, 215 transitions, 1930 flow [2024-11-13 14:25:51,436 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1930, PETRI_PLACES=133, PETRI_TRANSITIONS=215} [2024-11-13 14:25:51,437 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 95 predicate places. [2024-11-13 14:25:51,437 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 215 transitions, 1930 flow [2024-11-13 14:25:51,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:25:51,437 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:25:51,438 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:25:51,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-13 14:25:51,438 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 14:25:51,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:51,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1828415255, now seen corresponding path program 7 times [2024-11-13 14:25:51,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:51,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820719859] [2024-11-13 14:25:51,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:51,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:25:51,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:51,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820719859] [2024-11-13 14:25:51,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820719859] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:25:51,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:25:51,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:25:51,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469867143] [2024-11-13 14:25:51,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:25:51,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:25:51,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:51,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:25:51,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:25:51,791 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 36 [2024-11-13 14:25:51,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 215 transitions, 1930 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:25:51,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:25:51,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 36 [2024-11-13 14:25:51,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:25:52,826 INFO L124 PetriNetUnfolderBase]: 2127/4186 cut-off events. [2024-11-13 14:25:52,827 INFO L125 PetriNetUnfolderBase]: For 32074/32376 co-relation queries the response was YES. [2024-11-13 14:25:52,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20158 conditions, 4186 events. 2127/4186 cut-off events. For 32074/32376 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 26920 event pairs, 371 based on Foata normal form. 320/4320 useless extension candidates. Maximal degree in co-relation 16194. Up to 1756 conditions per place. [2024-11-13 14:25:52,891 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 157 selfloop transitions, 17 changer transitions 0/206 dead transitions. [2024-11-13 14:25:52,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 206 transitions, 2244 flow [2024-11-13 14:25:52,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:25:52,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 14:25:52,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-11-13 14:25:52,893 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-11-13 14:25:52,893 INFO L175 Difference]: Start difference. First operand has 133 places, 215 transitions, 1930 flow. Second operand 4 states and 88 transitions. [2024-11-13 14:25:52,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 206 transitions, 2244 flow [2024-11-13 14:25:53,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 206 transitions, 2187 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-11-13 14:25:53,089 INFO L231 Difference]: Finished difference. Result has 127 places, 175 transitions, 1631 flow [2024-11-13 14:25:53,090 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1521, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1631, PETRI_PLACES=127, PETRI_TRANSITIONS=175} [2024-11-13 14:25:53,090 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 89 predicate places. [2024-11-13 14:25:53,091 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 175 transitions, 1631 flow [2024-11-13 14:25:53,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:25:53,091 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:25:53,091 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] [2024-11-13 14:25:53,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-13 14:25:53,092 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 14:25:53,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:53,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1570095241, now seen corresponding path program 1 times [2024-11-13 14:25:53,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:53,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931326745] [2024-11-13 14:25:53,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:53,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:54,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:54,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931326745] [2024-11-13 14:25:54,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931326745] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:25:54,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703348683] [2024-11-13 14:25:54,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:54,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:54,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:54,920 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:25:54,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 14:25:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:55,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-13 14:25:55,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:25:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:55,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:25:56,545 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2024-11-13 14:25:56,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 50 [2024-11-13 14:25:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:57,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703348683] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:25:57,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:25:57,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 36 [2024-11-13 14:25:57,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137212132] [2024-11-13 14:25:57,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:25:57,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-13 14:25:57,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:57,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-13 14:25:57,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 14:25:57,494 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-11-13 14:25:57,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 175 transitions, 1631 flow. Second operand has 37 states, 37 states have (on average 11.27027027027027) internal successors, (417), 37 states have internal predecessors, (417), 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 14:25:57,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:25:57,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-11-13 14:25:57,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:26:13,004 INFO L124 PetriNetUnfolderBase]: 14673/25574 cut-off events. [2024-11-13 14:26:13,004 INFO L125 PetriNetUnfolderBase]: For 232133/232466 co-relation queries the response was YES. [2024-11-13 14:26:13,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131391 conditions, 25574 events. 14673/25574 cut-off events. For 232133/232466 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 194497 event pairs, 1516 based on Foata normal form. 771/25755 useless extension candidates. Maximal degree in co-relation 108156. Up to 5229 conditions per place. [2024-11-13 14:26:13,242 INFO L140 encePairwiseOnDemand]: 23/36 looper letters, 717 selfloop transitions, 375 changer transitions 274/1384 dead transitions. [2024-11-13 14:26:13,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 1384 transitions, 14836 flow [2024-11-13 14:26:13,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2024-11-13 14:26:13,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2024-11-13 14:26:13,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 1861 transitions. [2024-11-13 14:26:13,252 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49232804232804234 [2024-11-13 14:26:13,253 INFO L175 Difference]: Start difference. First operand has 127 places, 175 transitions, 1631 flow. Second operand 105 states and 1861 transitions. [2024-11-13 14:26:13,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 1384 transitions, 14836 flow [2024-11-13 14:26:14,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 1384 transitions, 14344 flow, removed 241 selfloop flow, removed 2 redundant places. [2024-11-13 14:26:14,686 INFO L231 Difference]: Finished difference. Result has 258 places, 516 transitions, 6438 flow [2024-11-13 14:26:14,686 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=6438, PETRI_PLACES=258, PETRI_TRANSITIONS=516} [2024-11-13 14:26:14,687 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 220 predicate places. [2024-11-13 14:26:14,687 INFO L471 AbstractCegarLoop]: Abstraction has has 258 places, 516 transitions, 6438 flow [2024-11-13 14:26:14,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 11.27027027027027) internal successors, (417), 37 states have internal predecessors, (417), 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 14:26:14,687 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:26:14,688 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] [2024-11-13 14:26:14,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-13 14:26:14,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:26:14,889 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 14:26:14,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:26:14,889 INFO L85 PathProgramCache]: Analyzing trace with hash 504074053, now seen corresponding path program 2 times [2024-11-13 14:26:14,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:26:14,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773935709] [2024-11-13 14:26:14,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:26:14,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:26:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:26:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:26:16,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:26:16,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773935709] [2024-11-13 14:26:16,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773935709] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:26:16,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194257148] [2024-11-13 14:26:16,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:26:16,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:26:16,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:26:16,793 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:26:16,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 14:26:16,920 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:26:16,920 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:26:16,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-13 14:26:16,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:26:17,913 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-11-13 14:26:17,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 17 [2024-11-13 14:26:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:26:18,026 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:26:18,759 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-11-13 14:26:18,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 60 [2024-11-13 14:26:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:26:20,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194257148] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:26:20,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:26:20,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 38 [2024-11-13 14:26:20,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331311250] [2024-11-13 14:26:20,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:26:20,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-13 14:26:20,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:26:20,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-13 14:26:20,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1290, Unknown=0, NotChecked=0, Total=1482 [2024-11-13 14:26:20,354 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2024-11-13 14:26:20,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 516 transitions, 6438 flow. Second operand has 39 states, 39 states have (on average 12.205128205128204) internal successors, (476), 39 states have internal predecessors, (476), 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 14:26:20,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:26:20,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2024-11-13 14:26:20,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:26:58,723 INFO L124 PetriNetUnfolderBase]: 39264/70965 cut-off events. [2024-11-13 14:26:58,723 INFO L125 PetriNetUnfolderBase]: For 1434248/1435312 co-relation queries the response was YES. [2024-11-13 14:26:59,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401901 conditions, 70965 events. 39264/70965 cut-off events. For 1434248/1435312 co-relation queries the response was YES. Maximal size of possible extension queue 1269. Compared 616556 event pairs, 4841 based on Foata normal form. 4318/74350 useless extension candidates. Maximal degree in co-relation 400234. Up to 13047 conditions per place. [2024-11-13 14:26:59,599 INFO L140 encePairwiseOnDemand]: 23/36 looper letters, 1231 selfloop transitions, 1158 changer transitions 889/3318 dead transitions. [2024-11-13 14:26:59,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 3318 transitions, 43207 flow [2024-11-13 14:26:59,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2024-11-13 14:26:59,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2024-11-13 14:26:59,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 2544 transitions. [2024-11-13 14:26:59,609 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5158150851581509 [2024-11-13 14:26:59,609 INFO L175 Difference]: Start difference. First operand has 258 places, 516 transitions, 6438 flow. Second operand 137 states and 2544 transitions. [2024-11-13 14:26:59,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 3318 transitions, 43207 flow [2024-11-13 14:27:21,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 3318 transitions, 34854 flow, removed 3345 selfloop flow, removed 32 redundant places. [2024-11-13 14:27:21,937 INFO L231 Difference]: Finished difference. Result has 430 places, 1496 transitions, 19057 flow [2024-11-13 14:27:21,937 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=4814, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=137, PETRI_FLOW=19057, PETRI_PLACES=430, PETRI_TRANSITIONS=1496} [2024-11-13 14:27:21,938 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 392 predicate places. [2024-11-13 14:27:21,938 INFO L471 AbstractCegarLoop]: Abstraction has has 430 places, 1496 transitions, 19057 flow [2024-11-13 14:27:21,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 12.205128205128204) internal successors, (476), 39 states have internal predecessors, (476), 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 14:27:21,939 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:27:21,939 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-11-13 14:27:21,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 14:27:22,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:27:22,143 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 14:27:22,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:27:22,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1879540005, now seen corresponding path program 3 times [2024-11-13 14:27:22,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:27:22,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151350824] [2024-11-13 14:27:22,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:27:22,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:27:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:27:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:27:25,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:27:25,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151350824] [2024-11-13 14:27:25,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151350824] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:27:25,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429287858] [2024-11-13 14:27:25,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:27:25,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:27:25,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:27:25,150 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:27:25,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef051824-b808-4eae-9bd2-5b9fd2616357/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 14:27:25,275 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 14:27:25,275 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:27:25,276 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-13 14:27:25,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:27:25,888 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:27:25,888 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:27:26,534 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:27:26,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-13 14:27:26,864 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 14:27:26,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429287858] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:27:26,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:27:26,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 10] total 33 [2024-11-13 14:27:26,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285972627] [2024-11-13 14:27:26,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:27:26,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-13 14:27:26,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:27:26,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-13 14:27:26,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2024-11-13 14:27:27,081 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2024-11-13 14:27:27,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 1496 transitions, 19057 flow. Second operand has 34 states, 34 states have (on average 12.558823529411764) internal successors, (427), 34 states have internal predecessors, (427), 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 14:27:27,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:27:27,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2024-11-13 14:27:27,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand