./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB --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 a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 19:56:20,313 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 19:56:20,403 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 19:56:20,409 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 19:56:20,410 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 19:56:20,439 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 19:56:20,440 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 19:56:20,440 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 19:56:20,441 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 19:56:20,441 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 19:56:20,441 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 19:56:20,441 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 19:56:20,442 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 19:56:20,442 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 19:56:20,442 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 19:56:20,443 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 19:56:20,443 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 19:56:20,443 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 19:56:20,443 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 19:56:20,443 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 19:56:20,444 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 19:56:20,444 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 19:56:20,444 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 19:56:20,444 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 19:56:20,444 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 19:56:20,444 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 19:56:20,444 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 19:56:20,445 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 19:56:20,445 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 19:56:20,445 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:56:20,445 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:56:20,446 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:56:20,446 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:56:20,446 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 19:56:20,446 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:56:20,446 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:56:20,446 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:56:20,447 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:56:20,447 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 19:56:20,447 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 19:56:20,447 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 19:56:20,447 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 19:56:20,447 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 19:56:20,448 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 19:56:20,448 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 19:56:20,448 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 19:56:20,448 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 19:56:20,448 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 19:56:20,448 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_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB 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 -> a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 [2024-11-27 19:56:20,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 19:56:20,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 19:56:20,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 19:56:20,839 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 19:56:20,839 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 19:56:20,841 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2024-11-27 19:56:24,447 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/data/0ffa54c5a/f979f0c93b4b452a85554bfb2bb647c3/FLAGea9ea18cb [2024-11-27 19:56:24,842 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 19:56:24,844 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2024-11-27 19:56:24,859 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/data/0ffa54c5a/f979f0c93b4b452a85554bfb2bb647c3/FLAGea9ea18cb [2024-11-27 19:56:25,024 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/data/0ffa54c5a/f979f0c93b4b452a85554bfb2bb647c3 [2024-11-27 19:56:25,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 19:56:25,028 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 19:56:25,030 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 19:56:25,030 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 19:56:25,036 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 19:56:25,037 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:56:25" (1/1) ... [2024-11-27 19:56:25,038 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51785f87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:25, skipping insertion in model container [2024-11-27 19:56:25,038 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:56:25" (1/1) ... [2024-11-27 19:56:25,062 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 19:56:25,370 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_d02c4bf0-b38a-49b6-959e-a38033386884/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2024-11-27 19:56:25,391 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:56:25,409 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 19:56:25,466 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_d02c4bf0-b38a-49b6-959e-a38033386884/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2024-11-27 19:56:25,471 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:56:25,491 INFO L204 MainTranslator]: Completed translation [2024-11-27 19:56:25,492 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:25 WrapperNode [2024-11-27 19:56:25,492 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 19:56:25,493 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 19:56:25,493 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 19:56:25,493 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 19:56:25,505 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:25" (1/1) ... [2024-11-27 19:56:25,522 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:25" (1/1) ... [2024-11-27 19:56:25,584 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 301 [2024-11-27 19:56:25,589 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 19:56:25,590 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 19:56:25,591 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 19:56:25,591 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 19:56:25,605 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:25" (1/1) ... [2024-11-27 19:56:25,606 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:25" (1/1) ... [2024-11-27 19:56:25,616 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:25" (1/1) ... [2024-11-27 19:56:25,662 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-27 19:56:25,662 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:25" (1/1) ... [2024-11-27 19:56:25,662 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:25" (1/1) ... [2024-11-27 19:56:25,673 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:25" (1/1) ... [2024-11-27 19:56:25,674 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:25" (1/1) ... [2024-11-27 19:56:25,679 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:25" (1/1) ... [2024-11-27 19:56:25,681 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:25" (1/1) ... [2024-11-27 19:56:25,683 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:25" (1/1) ... [2024-11-27 19:56:25,686 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 19:56:25,687 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 19:56:25,687 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 19:56:25,687 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 19:56:25,689 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:25" (1/1) ... [2024-11-27 19:56:25,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:56:25,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:56:25,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 19:56:25,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 19:56:25,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 19:56:25,767 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-27 19:56:25,768 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-27 19:56:25,768 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-27 19:56:25,768 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-27 19:56:25,768 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-27 19:56:25,768 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-27 19:56:25,768 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-27 19:56:25,768 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-27 19:56:25,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 19:56:25,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 19:56:25,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 19:56:25,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 19:56:25,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-27 19:56:25,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-27 19:56:25,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 19:56:25,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 19:56:25,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 19:56:25,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 19:56:25,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 19:56:25,771 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 19:56:25,931 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 19:56:25,934 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 19:56:26,590 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 19:56:26,590 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 19:56:27,289 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 19:56:27,290 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-27 19:56:27,290 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:56:27 BoogieIcfgContainer [2024-11-27 19:56:27,291 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 19:56:27,295 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 19:56:27,295 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 19:56:27,305 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 19:56:27,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 07:56:25" (1/3) ... [2024-11-27 19:56:27,306 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355225e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:56:27, skipping insertion in model container [2024-11-27 19:56:27,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:25" (2/3) ... [2024-11-27 19:56:27,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355225e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:56:27, skipping insertion in model container [2024-11-27 19:56:27,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:56:27" (3/3) ... [2024-11-27 19:56:27,308 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2024-11-27 19:56:27,329 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 19:56:27,333 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-buffer-mult-alt2.wvr.c that has 5 procedures, 43 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2024-11-27 19:56:27,334 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 19:56:27,451 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-27 19:56:27,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 48 transitions, 124 flow [2024-11-27 19:56:27,572 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2024-11-27 19:56:27,576 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-27 19:56:27,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 44 events. 6/44 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2024-11-27 19:56:27,584 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 48 transitions, 124 flow [2024-11-27 19:56:27,587 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 43 transitions, 110 flow [2024-11-27 19:56:27,651 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 19:56:27,670 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;@24b763eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 19:56:27,672 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-27 19:56:27,695 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 19:56:27,695 INFO L124 PetriNetUnfolderBase]: 6/42 cut-off events. [2024-11-27 19:56:27,696 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-27 19:56:27,696 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:56:27,698 INFO L206 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] [2024-11-27 19:56:27,698 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 2 more)] === [2024-11-27 19:56:27,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:56:27,707 INFO L85 PathProgramCache]: Analyzing trace with hash -354730807, now seen corresponding path program 1 times [2024-11-27 19:56:27,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:56:27,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866512228] [2024-11-27 19:56:27,718 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:56:27,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:56:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:56:29,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:56:29,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:56:29,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866512228] [2024-11-27 19:56:29,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866512228] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:56:29,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:56:29,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:56:29,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879606201] [2024-11-27 19:56:29,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:56:29,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 19:56:29,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:56:29,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 19:56:29,106 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-27 19:56:29,143 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-27 19:56:29,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:56:29,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:56:29,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-27 19:56:29,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:56:29,909 INFO L124 PetriNetUnfolderBase]: 1029/1674 cut-off events. [2024-11-27 19:56:29,909 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2024-11-27 19:56:29,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3312 conditions, 1674 events. 1029/1674 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 10228 event pairs, 110 based on Foata normal form. 80/1708 useless extension candidates. Maximal degree in co-relation 3168. Up to 997 conditions per place. [2024-11-27 19:56:29,948 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 51 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2024-11-27 19:56:29,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 70 transitions, 292 flow [2024-11-27 19:56:29,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:56:29,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 19:56:29,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-11-27 19:56:29,973 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-11-27 19:56:29,977 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 110 flow. Second operand 5 states and 151 transitions. [2024-11-27 19:56:29,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 70 transitions, 292 flow [2024-11-27 19:56:29,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 70 transitions, 264 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-27 19:56:29,997 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 110 flow [2024-11-27 19:56:30,000 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2024-11-27 19:56:30,005 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2024-11-27 19:56:30,005 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 110 flow [2024-11-27 19:56:30,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:56:30,007 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:56:30,008 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:56:30,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 19:56:30,008 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 2 more)] === [2024-11-27 19:56:30,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:56:30,010 INFO L85 PathProgramCache]: Analyzing trace with hash 582379520, now seen corresponding path program 1 times [2024-11-27 19:56:30,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:56:30,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414424815] [2024-11-27 19:56:30,010 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:56:30,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:56:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:56:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:56:30,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:56:30,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414424815] [2024-11-27 19:56:30,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414424815] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:56:30,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:56:30,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:56:30,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652163079] [2024-11-27 19:56:30,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:56:30,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 19:56:30,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:56:30,675 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 19:56:30,676 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 19:56:30,715 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-27 19:56:30,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 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) [2024-11-27 19:56:30,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:56:30,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-27 19:56:30,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:56:31,545 INFO L124 PetriNetUnfolderBase]: 1531/2294 cut-off events. [2024-11-27 19:56:31,545 INFO L125 PetriNetUnfolderBase]: For 493/790 co-relation queries the response was YES. [2024-11-27 19:56:31,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5039 conditions, 2294 events. 1531/2294 cut-off events. For 493/790 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 12736 event pairs, 168 based on Foata normal form. 381/2659 useless extension candidates. Maximal degree in co-relation 1398. Up to 1353 conditions per place. [2024-11-27 19:56:31,578 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 58 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2024-11-27 19:56:31,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 80 transitions, 332 flow [2024-11-27 19:56:31,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:56:31,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 19:56:31,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-11-27 19:56:31,581 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6215277777777778 [2024-11-27 19:56:31,583 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 110 flow. Second operand 6 states and 179 transitions. [2024-11-27 19:56:31,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 80 transitions, 332 flow [2024-11-27 19:56:31,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 80 transitions, 323 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 19:56:31,588 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 155 flow [2024-11-27 19:56:31,589 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=155, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2024-11-27 19:56:31,590 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2024-11-27 19:56:31,590 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 155 flow [2024-11-27 19:56:31,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 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) [2024-11-27 19:56:31,591 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:56:31,592 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:56:31,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 19:56:31,592 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 2 more)] === [2024-11-27 19:56:31,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:56:31,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1801328640, now seen corresponding path program 2 times [2024-11-27 19:56:31,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:56:31,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97140218] [2024-11-27 19:56:31,595 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:56:31,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:56:31,669 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:56:31,670 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:56:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:56:32,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:56:32,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97140218] [2024-11-27 19:56:32,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97140218] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:56:32,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:56:32,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:56:32,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902161957] [2024-11-27 19:56:32,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:56:32,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:56:32,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:56:32,014 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:56:32,014 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:56:32,014 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-11-27 19:56:32,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 155 flow. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2024-11-27 19:56:32,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:56:32,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-11-27 19:56:32,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:56:32,558 INFO L124 PetriNetUnfolderBase]: 1181/1915 cut-off events. [2024-11-27 19:56:32,558 INFO L125 PetriNetUnfolderBase]: For 2068/2430 co-relation queries the response was YES. [2024-11-27 19:56:32,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4869 conditions, 1915 events. 1181/1915 cut-off events. For 2068/2430 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11485 event pairs, 811 based on Foata normal form. 430/2170 useless extension candidates. Maximal degree in co-relation 1779. Up to 1526 conditions per place. [2024-11-27 19:56:32,581 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 29 selfloop transitions, 2 changer transitions 17/67 dead transitions. [2024-11-27 19:56:32,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 67 transitions, 297 flow [2024-11-27 19:56:32,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:56:32,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 19:56:32,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-11-27 19:56:32,583 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-11-27 19:56:32,583 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 155 flow. Second operand 5 states and 151 transitions. [2024-11-27 19:56:32,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 67 transitions, 297 flow [2024-11-27 19:56:32,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 67 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 19:56:32,593 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 172 flow [2024-11-27 19:56:32,593 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-11-27 19:56:32,595 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 7 predicate places. [2024-11-27 19:56:32,595 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 172 flow [2024-11-27 19:56:32,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2024-11-27 19:56:32,596 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:56:32,596 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:56:32,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 19:56:32,596 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 2 more)] === [2024-11-27 19:56:32,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:56:32,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1130135220, now seen corresponding path program 1 times [2024-11-27 19:56:32,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:56:32,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395591670] [2024-11-27 19:56:32,598 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:56:32,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:56:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:56:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:56:33,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:56:33,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395591670] [2024-11-27 19:56:33,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395591670] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:56:33,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974870436] [2024-11-27 19:56:33,007 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:56:33,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:56:33,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:56:33,012 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:56:33,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 19:56:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:56:33,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 19:56:33,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:56:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:56:33,547 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:56:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:56:33,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974870436] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 19:56:33,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:56:33,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 7] total 15 [2024-11-27 19:56:33,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648049282] [2024-11-27 19:56:33,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:56:33,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 19:56:33,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:56:33,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 19:56:33,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-11-27 19:56:33,912 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-11-27 19:56:33,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 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) [2024-11-27 19:56:33,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:56:33,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-11-27 19:56:33,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:56:35,539 INFO L124 PetriNetUnfolderBase]: 5847/8113 cut-off events. [2024-11-27 19:56:35,540 INFO L125 PetriNetUnfolderBase]: For 3273/3279 co-relation queries the response was YES. [2024-11-27 19:56:35,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19925 conditions, 8113 events. 5847/8113 cut-off events. For 3273/3279 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 50065 event pairs, 1063 based on Foata normal form. 114/7991 useless extension candidates. Maximal degree in co-relation 19908. Up to 2286 conditions per place. [2024-11-27 19:56:35,727 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 80 selfloop transitions, 14 changer transitions 0/105 dead transitions. [2024-11-27 19:56:35,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 105 transitions, 521 flow [2024-11-27 19:56:35,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:56:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 19:56:35,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-11-27 19:56:35,732 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-11-27 19:56:35,733 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 172 flow. Second operand 6 states and 176 transitions. [2024-11-27 19:56:35,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 105 transitions, 521 flow [2024-11-27 19:56:35,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 105 transitions, 505 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-11-27 19:56:35,751 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 261 flow [2024-11-27 19:56:35,751 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=261, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2024-11-27 19:56:35,752 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2024-11-27 19:56:35,753 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 261 flow [2024-11-27 19:56:35,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 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) [2024-11-27 19:56:35,753 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:56:35,754 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:56:35,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 19:56:35,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:56:35,959 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 2 more)] === [2024-11-27 19:56:35,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:56:35,960 INFO L85 PathProgramCache]: Analyzing trace with hash 822918339, now seen corresponding path program 1 times [2024-11-27 19:56:35,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:56:35,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906451902] [2024-11-27 19:56:35,961 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:56:35,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:56:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:56:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:56:37,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:56:37,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906451902] [2024-11-27 19:56:37,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906451902] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:56:37,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549850326] [2024-11-27 19:56:37,657 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:56:37,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:56:37,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:56:37,660 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:56:37,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 19:56:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:56:37,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-27 19:56:37,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:56:37,945 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 [2024-11-27 19:56:38,519 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 15 treesize of output 7 [2024-11-27 19:56:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:56:38,532 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:56:39,494 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 39 treesize of output 35 [2024-11-27 19:56:39,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 47 treesize of output 35 [2024-11-27 19:56:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:56:39,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549850326] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:56:39,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:56:39,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-27 19:56:39,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949192783] [2024-11-27 19:56:39,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:56:39,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 19:56:39,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:56:39,590 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 19:56:39,591 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-11-27 19:56:39,764 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-11-27 19:56:39,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 261 flow. Second operand has 18 states, 18 states have (on average 24.38888888888889) internal successors, (439), 18 states have internal predecessors, (439), 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) [2024-11-27 19:56:39,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:56:39,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-11-27 19:56:39,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:56:45,030 INFO L124 PetriNetUnfolderBase]: 10325/16967 cut-off events. [2024-11-27 19:56:45,030 INFO L125 PetriNetUnfolderBase]: For 28726/30690 co-relation queries the response was YES. [2024-11-27 19:56:45,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48135 conditions, 16967 events. 10325/16967 cut-off events. For 28726/30690 co-relation queries the response was YES. Maximal size of possible extension queue 1067. Compared 135049 event pairs, 345 based on Foata normal form. 1592/18078 useless extension candidates. Maximal degree in co-relation 25135. Up to 4235 conditions per place. [2024-11-27 19:56:45,195 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 272 selfloop transitions, 75 changer transitions 4/374 dead transitions. [2024-11-27 19:56:45,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 374 transitions, 2153 flow [2024-11-27 19:56:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-27 19:56:45,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-27 19:56:45,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 874 transitions. [2024-11-27 19:56:45,200 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7003205128205128 [2024-11-27 19:56:45,201 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 261 flow. Second operand 26 states and 874 transitions. [2024-11-27 19:56:45,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 374 transitions, 2153 flow [2024-11-27 19:56:45,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 374 transitions, 2119 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-11-27 19:56:45,264 INFO L231 Difference]: Finished difference. Result has 95 places, 133 transitions, 938 flow [2024-11-27 19:56:45,264 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=938, PETRI_PLACES=95, PETRI_TRANSITIONS=133} [2024-11-27 19:56:45,265 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 45 predicate places. [2024-11-27 19:56:45,265 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 133 transitions, 938 flow [2024-11-27 19:56:45,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 24.38888888888889) internal successors, (439), 18 states have internal predecessors, (439), 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) [2024-11-27 19:56:45,266 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:56:45,266 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:56:45,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 19:56:45,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:56:45,470 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 2 more)] === [2024-11-27 19:56:45,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:56:45,471 INFO L85 PathProgramCache]: Analyzing trace with hash 948057717, now seen corresponding path program 1 times [2024-11-27 19:56:45,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:56:45,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492995107] [2024-11-27 19:56:45,471 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:56:45,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:56:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:56:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:56:47,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:56:47,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492995107] [2024-11-27 19:56:47,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492995107] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:56:47,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501073705] [2024-11-27 19:56:47,206 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:56:47,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:56:47,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:56:47,209 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:56:47,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 19:56:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:56:47,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 19:56:47,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:56:47,726 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 25 treesize of output 7 [2024-11-27 19:56:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 19:56:47,753 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:56:47,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:56:47,924 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 26 treesize of output 18 [2024-11-27 19:56:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 19:56:48,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501073705] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:56:48,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:56:48,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2024-11-27 19:56:48,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36568786] [2024-11-27 19:56:48,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:56:48,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 19:56:48,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:56:48,263 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 19:56:48,265 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-27 19:56:48,382 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-11-27 19:56:48,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 133 transitions, 938 flow. Second operand has 15 states, 15 states have (on average 24.666666666666668) internal successors, (370), 15 states have internal predecessors, (370), 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) [2024-11-27 19:56:48,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:56:48,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-11-27 19:56:48,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:56:53,708 INFO L124 PetriNetUnfolderBase]: 17554/29087 cut-off events. [2024-11-27 19:56:53,708 INFO L125 PetriNetUnfolderBase]: For 108107/111535 co-relation queries the response was YES. [2024-11-27 19:56:53,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96862 conditions, 29087 events. 17554/29087 cut-off events. For 108107/111535 co-relation queries the response was YES. Maximal size of possible extension queue 1767. Compared 252303 event pairs, 815 based on Foata normal form. 2587/31160 useless extension candidates. Maximal degree in co-relation 86062. Up to 9546 conditions per place. [2024-11-27 19:56:54,042 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 178 selfloop transitions, 102 changer transitions 2/305 dead transitions. [2024-11-27 19:56:54,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 305 transitions, 2340 flow [2024-11-27 19:56:54,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-27 19:56:54,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-27 19:56:54,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 534 transitions. [2024-11-27 19:56:54,045 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6544117647058824 [2024-11-27 19:56:54,046 INFO L175 Difference]: Start difference. First operand has 95 places, 133 transitions, 938 flow. Second operand 17 states and 534 transitions. [2024-11-27 19:56:54,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 305 transitions, 2340 flow [2024-11-27 19:56:54,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 305 transitions, 2314 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-11-27 19:56:54,568 INFO L231 Difference]: Finished difference. Result has 117 places, 185 transitions, 1699 flow [2024-11-27 19:56:54,568 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1699, PETRI_PLACES=117, PETRI_TRANSITIONS=185} [2024-11-27 19:56:54,569 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 67 predicate places. [2024-11-27 19:56:54,569 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 185 transitions, 1699 flow [2024-11-27 19:56:54,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 24.666666666666668) internal successors, (370), 15 states have internal predecessors, (370), 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) [2024-11-27 19:56:54,570 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:56:54,570 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:56:54,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 19:56:54,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:56:54,771 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 2 more)] === [2024-11-27 19:56:54,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:56:54,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1938566766, now seen corresponding path program 1 times [2024-11-27 19:56:54,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:56:54,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764074795] [2024-11-27 19:56:54,772 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:56:54,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:56:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:56:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 19:56:54,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:56:54,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764074795] [2024-11-27 19:56:54,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764074795] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:56:54,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:56:54,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:56:54,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86892407] [2024-11-27 19:56:54,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:56:54,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:56:54,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:56:54,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:56:54,951 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:56:54,956 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-11-27 19:56:54,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 185 transitions, 1699 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2024-11-27 19:56:54,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:56:54,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-11-27 19:56:54,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:57:01,689 INFO L124 PetriNetUnfolderBase]: 22951/37236 cut-off events. [2024-11-27 19:57:01,690 INFO L125 PetriNetUnfolderBase]: For 248247/252824 co-relation queries the response was YES. [2024-11-27 19:57:01,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138424 conditions, 37236 events. 22951/37236 cut-off events. For 248247/252824 co-relation queries the response was YES. Maximal size of possible extension queue 1974. Compared 318551 event pairs, 6353 based on Foata normal form. 3048/38722 useless extension candidates. Maximal degree in co-relation 132467. Up to 19623 conditions per place. [2024-11-27 19:57:02,085 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 224 selfloop transitions, 8 changer transitions 0/255 dead transitions. [2024-11-27 19:57:02,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 255 transitions, 3004 flow [2024-11-27 19:57:02,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:57:02,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 19:57:02,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-11-27 19:57:02,089 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7430555555555556 [2024-11-27 19:57:02,089 INFO L175 Difference]: Start difference. First operand has 117 places, 185 transitions, 1699 flow. Second operand 3 states and 107 transitions. [2024-11-27 19:57:02,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 255 transitions, 3004 flow [2024-11-27 19:57:02,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 255 transitions, 2911 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-11-27 19:57:02,924 INFO L231 Difference]: Finished difference. Result has 118 places, 186 transitions, 1738 flow [2024-11-27 19:57:02,924 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1644, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1738, PETRI_PLACES=118, PETRI_TRANSITIONS=186} [2024-11-27 19:57:02,925 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 68 predicate places. [2024-11-27 19:57:02,925 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 186 transitions, 1738 flow [2024-11-27 19:57:02,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2024-11-27 19:57:02,925 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:57:02,925 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:57:02,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-27 19:57:02,926 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 2 more)] === [2024-11-27 19:57:02,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:57:02,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1233011039, now seen corresponding path program 1 times [2024-11-27 19:57:02,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:57:02,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666958598] [2024-11-27 19:57:02,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:57:02,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:57:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:57:03,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 19:57:03,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:57:03,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666958598] [2024-11-27 19:57:03,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666958598] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:57:03,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:57:03,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:57:03,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722053254] [2024-11-27 19:57:03,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:57:03,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:57:03,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:57:03,116 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:57:03,116 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:57:03,116 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-11-27 19:57:03,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 186 transitions, 1738 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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) [2024-11-27 19:57:03,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:57:03,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-11-27 19:57:03,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:57:08,888 INFO L124 PetriNetUnfolderBase]: 17482/28734 cut-off events. [2024-11-27 19:57:08,889 INFO L125 PetriNetUnfolderBase]: For 181769/184883 co-relation queries the response was YES. [2024-11-27 19:57:09,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111321 conditions, 28734 events. 17482/28734 cut-off events. For 181769/184883 co-relation queries the response was YES. Maximal size of possible extension queue 1601. Compared 251026 event pairs, 10884 based on Foata normal form. 2797/29497 useless extension candidates. Maximal degree in co-relation 106193. Up to 15871 conditions per place. [2024-11-27 19:57:09,252 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 148 selfloop transitions, 11 changer transitions 11/193 dead transitions. [2024-11-27 19:57:09,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 193 transitions, 2126 flow [2024-11-27 19:57:09,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:57:09,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 19:57:09,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-11-27 19:57:09,254 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-11-27 19:57:09,254 INFO L175 Difference]: Start difference. First operand has 118 places, 186 transitions, 1738 flow. Second operand 4 states and 132 transitions. [2024-11-27 19:57:09,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 193 transitions, 2126 flow [2024-11-27 19:57:10,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 193 transitions, 2085 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-11-27 19:57:10,199 INFO L231 Difference]: Finished difference. Result has 116 places, 146 transitions, 1340 flow [2024-11-27 19:57:10,200 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1340, PETRI_PLACES=116, PETRI_TRANSITIONS=146} [2024-11-27 19:57:10,200 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 66 predicate places. [2024-11-27 19:57:10,201 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 146 transitions, 1340 flow [2024-11-27 19:57:10,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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) [2024-11-27 19:57:10,201 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:57:10,201 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:57:10,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-27 19:57:10,201 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 2 more)] === [2024-11-27 19:57:10,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:57:10,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1864355695, now seen corresponding path program 1 times [2024-11-27 19:57:10,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:57:10,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567741161] [2024-11-27 19:57:10,203 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:57:10,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:57:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:57:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 19:57:10,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:57:10,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567741161] [2024-11-27 19:57:10,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567741161] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:57:10,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596968837] [2024-11-27 19:57:10,909 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:57:10,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:57:10,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:57:10,912 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:57:10,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02c4bf0-b38a-49b6-959e-a38033386884/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 19:57:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:57:11,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-27 19:57:11,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:57:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 19:57:11,741 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:57:12,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 19:57:12,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596968837] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:57:12,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:57:12,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 11] total 25 [2024-11-27 19:57:12,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290091403] [2024-11-27 19:57:12,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:57:12,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-27 19:57:12,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:57:12,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-27 19:57:12,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2024-11-27 19:57:12,546 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-11-27 19:57:12,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 146 transitions, 1340 flow. Second operand has 26 states, 26 states have (on average 12.461538461538462) internal successors, (324), 26 states have internal predecessors, (324), 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) [2024-11-27 19:57:12,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:57:12,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-11-27 19:57:12,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand