./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/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_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bb07434636f33664cc09ed992a41516efeea5f96121c916fb8904844e76d9fcd --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:32:41,551 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:32:41,642 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 03:32:41,652 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:32:41,655 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:32:41,714 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:32:41,715 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:32:41,716 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:32:41,716 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:32:41,717 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:32:41,719 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:32:41,719 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:32:41,720 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:32:41,720 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:32:41,720 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:32:41,720 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:32:41,720 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:32:41,721 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:32:41,721 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:32:41,722 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:32:41,722 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 03:32:41,722 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 03:32:41,722 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 03:32:41,722 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:32:41,722 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 03:32:41,723 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 03:32:41,723 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:32:41,723 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:32:41,723 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:32:41,723 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:32:41,723 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:32:41,724 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:32:41,724 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:32:41,724 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:32:41,725 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:32:41,725 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:32:41,726 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:32:41,726 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:32:41,726 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:32:41,726 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:32:41,726 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:32:41,726 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:32:41,727 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:32:41,727 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:32:41,727 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:32:41,727 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:32:41,727 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:32:41,727 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_81090f67-0af9-4d54-80be-3839e79d0f01/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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> bb07434636f33664cc09ed992a41516efeea5f96121c916fb8904844e76d9fcd [2024-11-28 03:32:42,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:32:42,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:32:42,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:32:42,108 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:32:42,108 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:32:42,111 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/unroll-4.wvr.c [2024-11-28 03:32:45,743 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/data/3779c9d7a/4bd1df79f1854eddad7b693cb3d65d60/FLAG68772f9bb [2024-11-28 03:32:46,100 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:32:46,107 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/sv-benchmarks/c/weaver/unroll-4.wvr.c [2024-11-28 03:32:46,119 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/data/3779c9d7a/4bd1df79f1854eddad7b693cb3d65d60/FLAG68772f9bb [2024-11-28 03:32:46,167 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/data/3779c9d7a/4bd1df79f1854eddad7b693cb3d65d60 [2024-11-28 03:32:46,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:32:46,173 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:32:46,177 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:32:46,177 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:32:46,183 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:32:46,184 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:32:46" (1/1) ... [2024-11-28 03:32:46,185 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a44f1bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:46, skipping insertion in model container [2024-11-28 03:32:46,188 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:32:46" (1/1) ... [2024-11-28 03:32:46,212 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:32:46,475 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 03:32:46,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:32:46,499 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:32:46,549 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:32:46,580 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:32:46,581 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:46 WrapperNode [2024-11-28 03:32:46,584 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:32:46,585 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:32:46,586 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:32:46,586 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:32:46,595 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:46" (1/1) ... [2024-11-28 03:32:46,605 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:46" (1/1) ... [2024-11-28 03:32:46,639 INFO L138 Inliner]: procedures = 23, calls = 27, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 146 [2024-11-28 03:32:46,640 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:32:46,641 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:32:46,641 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:32:46,641 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:32:46,651 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:46" (1/1) ... [2024-11-28 03:32:46,651 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:46" (1/1) ... [2024-11-28 03:32:46,654 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:46" (1/1) ... [2024-11-28 03:32:46,672 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 1 writes are split as follows [0, 1]. [2024-11-28 03:32:46,672 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:46" (1/1) ... [2024-11-28 03:32:46,672 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:46" (1/1) ... [2024-11-28 03:32:46,681 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:46" (1/1) ... [2024-11-28 03:32:46,683 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:46" (1/1) ... [2024-11-28 03:32:46,687 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:46" (1/1) ... [2024-11-28 03:32:46,689 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:46" (1/1) ... [2024-11-28 03:32:46,690 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:46" (1/1) ... [2024-11-28 03:32:46,693 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:32:46,694 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:32:46,694 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:32:46,694 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:32:46,695 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:46" (1/1) ... [2024-11-28 03:32:46,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:32:46,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:32:46,740 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:32:46,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:32:46,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:32:46,783 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 03:32:46,783 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 03:32:46,783 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 03:32:46,783 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 03:32:46,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:32:46,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 03:32:46,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 03:32:46,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 03:32:46,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 03:32:46,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:32:46,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:32:46,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 03:32:46,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 03:32:46,787 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 03:32:46,926 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:32:46,928 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:32:47,362 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 03:32:47,362 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:32:47,843 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:32:47,843 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 03:32:47,844 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:32:47 BoogieIcfgContainer [2024-11-28 03:32:47,844 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:32:47,849 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:32:47,849 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:32:47,856 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:32:47,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:32:46" (1/3) ... [2024-11-28 03:32:47,857 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3345f2d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:32:47, skipping insertion in model container [2024-11-28 03:32:47,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:46" (2/3) ... [2024-11-28 03:32:47,857 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3345f2d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:32:47, skipping insertion in model container [2024-11-28 03:32:47,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:32:47" (3/3) ... [2024-11-28 03:32:47,860 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2024-11-28 03:32:47,883 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:32:47,884 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-4.wvr.c that has 3 procedures, 38 locations, 1 initial locations, 3 loop locations, and 14 error locations. [2024-11-28 03:32:47,885 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 03:32:47,995 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 03:32:48,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 40 transitions, 94 flow [2024-11-28 03:32:48,105 INFO L124 PetriNetUnfolderBase]: 3/38 cut-off events. [2024-11-28 03:32:48,108 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 03:32:48,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 38 events. 3/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-11-28 03:32:48,114 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 40 transitions, 94 flow [2024-11-28 03:32:48,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 37 transitions, 86 flow [2024-11-28 03:32:48,134 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:32:48,157 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=None, 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;@12e4c2f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:32:48,157 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-11-28 03:32:48,162 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 03:32:48,162 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-28 03:32:48,162 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 03:32:48,162 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:32:48,163 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 03:32:48,164 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:32:48,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:32:48,170 INFO L85 PathProgramCache]: Analyzing trace with hash 515294, now seen corresponding path program 1 times [2024-11-28 03:32:48,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:32:48,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556371484] [2024-11-28 03:32:48,181 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:32:48,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:32:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:32:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:32:48,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:32:48,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556371484] [2024-11-28 03:32:48,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556371484] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:32:48,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:32:48,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 03:32:48,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055212405] [2024-11-28 03:32:48,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:32:48,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:32:48,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:32:48,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:32:48,630 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:32:48,668 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-28 03:32:48,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2024-11-28 03:32:48,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:32:48,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-28 03:32:48,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:32:48,903 INFO L124 PetriNetUnfolderBase]: 101/253 cut-off events. [2024-11-28 03:32:48,904 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-28 03:32:48,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 253 events. 101/253 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1136 event pairs, 75 based on Foata normal form. 1/191 useless extension candidates. Maximal degree in co-relation 390. Up to 175 conditions per place. [2024-11-28 03:32:48,911 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 20 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-11-28 03:32:48,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 124 flow [2024-11-28 03:32:48,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:32:48,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:32:48,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-11-28 03:32:48,939 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-11-28 03:32:48,942 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 86 flow. Second operand 3 states and 69 transitions. [2024-11-28 03:32:48,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 124 flow [2024-11-28 03:32:48,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 116 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 03:32:48,954 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 76 flow [2024-11-28 03:32:48,958 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2024-11-28 03:32:48,965 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -5 predicate places. [2024-11-28 03:32:48,966 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 76 flow [2024-11-28 03:32:48,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2024-11-28 03:32:48,966 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:32:48,967 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 03:32:48,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:32:48,967 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:32:48,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:32:48,969 INFO L85 PathProgramCache]: Analyzing trace with hash 515295, now seen corresponding path program 1 times [2024-11-28 03:32:48,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:32:48,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975968466] [2024-11-28 03:32:48,970 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:32:48,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:32:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:32:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:32:49,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:32:49,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975968466] [2024-11-28 03:32:49,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975968466] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:32:49,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:32:49,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:32:49,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043535271] [2024-11-28 03:32:49,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:32:49,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:32:49,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:32:49,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:32:49,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:32:49,542 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-28 03:32:49,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:32:49,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:32:49,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-28 03:32:49,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:32:49,761 INFO L124 PetriNetUnfolderBase]: 102/256 cut-off events. [2024-11-28 03:32:49,761 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-28 03:32:49,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 256 events. 102/256 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1147 event pairs, 75 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 426. Up to 180 conditions per place. [2024-11-28 03:32:49,766 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 23 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2024-11-28 03:32:49,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 37 transitions, 136 flow [2024-11-28 03:32:49,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:32:49,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:32:49,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-11-28 03:32:49,769 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-28 03:32:49,769 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 76 flow. Second operand 3 states and 72 transitions. [2024-11-28 03:32:49,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 37 transitions, 136 flow [2024-11-28 03:32:49,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 37 transitions, 130 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:32:49,774 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 91 flow [2024-11-28 03:32:49,774 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2024-11-28 03:32:49,775 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2024-11-28 03:32:49,775 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 91 flow [2024-11-28 03:32:49,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:32:49,775 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:32:49,776 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-28 03:32:49,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 03:32:49,777 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:32:49,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:32:49,778 INFO L85 PathProgramCache]: Analyzing trace with hash 495215031, now seen corresponding path program 1 times [2024-11-28 03:32:49,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:32:49,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680687774] [2024-11-28 03:32:49,778 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:32:49,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:32:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:32:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:32:50,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:32:50,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680687774] [2024-11-28 03:32:50,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680687774] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:32:50,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327060292] [2024-11-28 03:32:50,381 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:32:50,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:32:50,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:32:50,386 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:32:50,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:32:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:32:50,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:32:50,474 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:32:50,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 1 [2024-11-28 03:32:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:32:50,864 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:32:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:32:51,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327060292] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:32:51,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:32:51,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-28 03:32:51,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000191414] [2024-11-28 03:32:51,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:32:51,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:32:51,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:32:51,077 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:32:51,079 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:32:51,327 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-28 03:32:51,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 91 flow. Second operand has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 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) [2024-11-28 03:32:51,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:32:51,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-28 03:32:51,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:32:51,699 INFO L124 PetriNetUnfolderBase]: 102/255 cut-off events. [2024-11-28 03:32:51,699 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-28 03:32:51,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 255 events. 102/255 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1147 event pairs, 75 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 426. Up to 176 conditions per place. [2024-11-28 03:32:51,703 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 19 selfloop transitions, 6 changer transitions 0/36 dead transitions. [2024-11-28 03:32:51,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 139 flow [2024-11-28 03:32:51,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:32:51,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:32:51,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-11-28 03:32:51,706 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.505 [2024-11-28 03:32:51,706 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 91 flow. Second operand 5 states and 101 transitions. [2024-11-28 03:32:51,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 139 flow [2024-11-28 03:32:51,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 36 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:32:51,709 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 104 flow [2024-11-28 03:32:51,709 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=104, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-11-28 03:32:51,710 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2024-11-28 03:32:51,710 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 104 flow [2024-11-28 03:32:51,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 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) [2024-11-28 03:32:51,711 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:32:51,711 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 03:32:51,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 03:32:51,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:32:51,912 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:32:51,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:32:51,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1826262035, now seen corresponding path program 1 times [2024-11-28 03:32:51,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:32:51,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864281111] [2024-11-28 03:32:51,913 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:32:51,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:32:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:32:52,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:32:52,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:32:52,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864281111] [2024-11-28 03:32:52,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864281111] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:32:52,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:32:52,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:32:52,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672746669] [2024-11-28 03:32:52,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:32:52,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:32:52,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:32:52,024 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:32:52,024 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:32:52,028 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:32:52,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2024-11-28 03:32:52,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:32:52,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:32:52,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:32:52,158 INFO L124 PetriNetUnfolderBase]: 101/254 cut-off events. [2024-11-28 03:32:52,159 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-28 03:32:52,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 254 events. 101/254 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1142 event pairs, 75 based on Foata normal form. 1/193 useless extension candidates. Maximal degree in co-relation 426. Up to 177 conditions per place. [2024-11-28 03:32:52,165 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 20 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2024-11-28 03:32:52,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 146 flow [2024-11-28 03:32:52,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:32:52,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:32:52,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-11-28 03:32:52,168 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-28 03:32:52,168 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 104 flow. Second operand 3 states and 72 transitions. [2024-11-28 03:32:52,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 146 flow [2024-11-28 03:32:52,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 136 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-28 03:32:52,171 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 96 flow [2024-11-28 03:32:52,171 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-11-28 03:32:52,172 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2024-11-28 03:32:52,172 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 96 flow [2024-11-28 03:32:52,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2024-11-28 03:32:52,172 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:32:52,172 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:32:52,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 03:32:52,173 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:32:52,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:32:52,173 INFO L85 PathProgramCache]: Analyzing trace with hash -259219436, now seen corresponding path program 1 times [2024-11-28 03:32:52,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:32:52,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835755537] [2024-11-28 03:32:52,174 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:32:52,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:32:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:32:52,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:32:52,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:32:52,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835755537] [2024-11-28 03:32:52,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835755537] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:32:52,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:32:52,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:32:52,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628881921] [2024-11-28 03:32:52,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:32:52,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:32:52,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:32:52,263 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:32:52,263 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:32:52,309 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-28 03:32:52,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2024-11-28 03:32:52,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:32:52,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-28 03:32:52,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:32:52,412 INFO L124 PetriNetUnfolderBase]: 101/217 cut-off events. [2024-11-28 03:32:52,413 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-28 03:32:52,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 217 events. 101/217 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 776 event pairs, 75 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 392. Up to 174 conditions per place. [2024-11-28 03:32:52,415 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 22 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-11-28 03:32:52,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 134 flow [2024-11-28 03:32:52,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:32:52,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:32:52,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-11-28 03:32:52,417 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-11-28 03:32:52,417 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 96 flow. Second operand 4 states and 67 transitions. [2024-11-28 03:32:52,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 134 flow [2024-11-28 03:32:52,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:32:52,419 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 82 flow [2024-11-28 03:32:52,419 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2024-11-28 03:32:52,420 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -6 predicate places. [2024-11-28 03:32:52,420 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 82 flow [2024-11-28 03:32:52,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2024-11-28 03:32:52,420 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:32:52,421 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:32:52,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 03:32:52,421 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:32:52,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:32:52,422 INFO L85 PathProgramCache]: Analyzing trace with hash -259219435, now seen corresponding path program 1 times [2024-11-28 03:32:52,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:32:52,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800259998] [2024-11-28 03:32:52,422 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:32:52,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:32:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:32:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:32:52,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:32:52,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800259998] [2024-11-28 03:32:52,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800259998] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:32:52,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100162473] [2024-11-28 03:32:52,756 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:32:52,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:32:52,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:32:52,759 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:32:52,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:32:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:32:52,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:32:52,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:32:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:32:52,982 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:32:53,079 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 29 treesize of output 25 [2024-11-28 03:32:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:32:53,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100162473] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:32:53,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:32:53,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-28 03:32:53,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114205192] [2024-11-28 03:32:53,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:32:53,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:32:53,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:32:53,119 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:32:53,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:32:53,383 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-28 03:32:53,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 82 flow. Second operand has 11 states, 11 states have (on average 17.181818181818183) internal successors, (189), 11 states have internal predecessors, (189), 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) [2024-11-28 03:32:53,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:32:53,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-28 03:32:53,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:32:53,649 INFO L124 PetriNetUnfolderBase]: 200/387 cut-off events. [2024-11-28 03:32:53,649 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-28 03:32:53,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 387 events. 200/387 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1622 event pairs, 75 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 735. Up to 189 conditions per place. [2024-11-28 03:32:53,654 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 38 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2024-11-28 03:32:53,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 46 transitions, 199 flow [2024-11-28 03:32:53,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:32:53,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:32:53,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-11-28 03:32:53,657 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-28 03:32:53,657 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 82 flow. Second operand 4 states and 100 transitions. [2024-11-28 03:32:53,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 46 transitions, 199 flow [2024-11-28 03:32:53,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 46 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:32:53,662 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 93 flow [2024-11-28 03:32:53,662 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2024-11-28 03:32:53,663 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2024-11-28 03:32:53,665 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 93 flow [2024-11-28 03:32:53,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.181818181818183) internal successors, (189), 11 states have internal predecessors, (189), 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) [2024-11-28 03:32:53,666 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:32:53,666 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:32:53,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 03:32:53,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:32:53,867 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:32:53,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:32:53,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1994303, now seen corresponding path program 1 times [2024-11-28 03:32:53,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:32:53,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784254734] [2024-11-28 03:32:53,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:32:53,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:32:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:32:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:32:54,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:32:54,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784254734] [2024-11-28 03:32:54,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784254734] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:32:54,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398392992] [2024-11-28 03:32:54,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:32:54,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:32:54,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:32:54,177 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:32:54,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:32:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:32:54,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:32:54,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:32:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:32:54,429 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:32:54,560 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 29 treesize of output 25 [2024-11-28 03:32:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:32:54,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398392992] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:32:54,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:32:54,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-28 03:32:54,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405789365] [2024-11-28 03:32:54,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:32:54,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:32:54,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:32:54,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:32:54,602 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:32:54,805 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-28 03:32:54,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 93 flow. Second operand has 11 states, 11 states have (on average 14.727272727272727) internal successors, (162), 11 states have internal predecessors, (162), 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) [2024-11-28 03:32:54,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:32:54,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-28 03:32:54,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:32:55,171 INFO L124 PetriNetUnfolderBase]: 338/599 cut-off events. [2024-11-28 03:32:55,171 INFO L125 PetriNetUnfolderBase]: For 76/96 co-relation queries the response was YES. [2024-11-28 03:32:55,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1307 conditions, 599 events. 338/599 cut-off events. For 76/96 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2325 event pairs, 81 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 1280. Up to 411 conditions per place. [2024-11-28 03:32:55,176 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 38 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2024-11-28 03:32:55,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 43 transitions, 206 flow [2024-11-28 03:32:55,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:32:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:32:55,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-11-28 03:32:55,178 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-11-28 03:32:55,178 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 93 flow. Second operand 4 states and 86 transitions. [2024-11-28 03:32:55,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 43 transitions, 206 flow [2024-11-28 03:32:55,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 43 transitions, 201 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:32:55,181 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 103 flow [2024-11-28 03:32:55,181 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2024-11-28 03:32:55,182 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2024-11-28 03:32:55,182 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 103 flow [2024-11-28 03:32:55,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.727272727272727) internal successors, (162), 11 states have internal predecessors, (162), 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) [2024-11-28 03:32:55,182 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:32:55,183 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:32:55,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:32:55,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-28 03:32:55,387 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:32:55,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:32:55,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1757159, now seen corresponding path program 1 times [2024-11-28 03:32:55,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:32:55,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385483254] [2024-11-28 03:32:55,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:32:55,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:32:55,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:32:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:32:55,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:32:55,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385483254] [2024-11-28 03:32:55,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385483254] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:32:55,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474244820] [2024-11-28 03:32:55,701 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:32:55,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:32:55,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:32:55,704 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:32:55,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:32:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:32:55,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:32:55,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:32:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:32:56,025 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:32:56,152 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 36 treesize of output 32 [2024-11-28 03:32:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:32:56,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474244820] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:32:56,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:32:56,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-28 03:32:56,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412118404] [2024-11-28 03:32:56,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:32:56,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:32:56,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:32:56,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:32:56,455 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:32:57,194 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-28 03:32:57,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 103 flow. Second operand has 17 states, 17 states have (on average 16.764705882352942) internal successors, (285), 17 states have internal predecessors, (285), 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) [2024-11-28 03:32:57,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:32:57,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-28 03:32:57,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:32:57,812 INFO L124 PetriNetUnfolderBase]: 523/1054 cut-off events. [2024-11-28 03:32:57,813 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2024-11-28 03:32:57,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2258 conditions, 1054 events. 523/1054 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5547 event pairs, 297 based on Foata normal form. 0/876 useless extension candidates. Maximal degree in co-relation 1181. Up to 485 conditions per place. [2024-11-28 03:32:57,822 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 69 selfloop transitions, 11 changer transitions 0/85 dead transitions. [2024-11-28 03:32:57,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 85 transitions, 412 flow [2024-11-28 03:32:57,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:32:57,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:32:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-11-28 03:32:57,824 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-11-28 03:32:57,824 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 103 flow. Second operand 8 states and 196 transitions. [2024-11-28 03:32:57,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 85 transitions, 412 flow [2024-11-28 03:32:57,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 85 transitions, 404 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:32:57,828 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 190 flow [2024-11-28 03:32:57,828 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=190, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2024-11-28 03:32:57,829 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-11-28 03:32:57,829 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 190 flow [2024-11-28 03:32:57,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 16.764705882352942) internal successors, (285), 17 states have internal predecessors, (285), 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) [2024-11-28 03:32:57,829 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:32:57,829 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:32:57,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 03:32:58,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-28 03:32:58,034 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:32:58,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:32:58,034 INFO L85 PathProgramCache]: Analyzing trace with hash -61822858, now seen corresponding path program 1 times [2024-11-28 03:32:58,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:32:58,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260695047] [2024-11-28 03:32:58,034 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:32:58,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:32:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:32:58,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:32:58,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:32:58,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260695047] [2024-11-28 03:32:58,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260695047] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:32:58,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725843390] [2024-11-28 03:32:58,310 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:32:58,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:32:58,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:32:58,313 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:32:58,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:32:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:32:58,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:32:58,402 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:32:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:32:58,598 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:32:58,652 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 29 treesize of output 25 [2024-11-28 03:32:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:32:58,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725843390] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:32:58,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:32:58,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-28 03:32:58,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146466851] [2024-11-28 03:32:58,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:32:58,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:32:58,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:32:58,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:32:58,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:32:59,236 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-28 03:32:59,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 190 flow. Second operand has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 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) [2024-11-28 03:32:59,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:32:59,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-28 03:32:59,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:32:59,769 INFO L124 PetriNetUnfolderBase]: 744/1306 cut-off events. [2024-11-28 03:32:59,770 INFO L125 PetriNetUnfolderBase]: For 809/849 co-relation queries the response was YES. [2024-11-28 03:32:59,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3306 conditions, 1306 events. 744/1306 cut-off events. For 809/849 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6080 event pairs, 375 based on Foata normal form. 0/1114 useless extension candidates. Maximal degree in co-relation 1975. Up to 997 conditions per place. [2024-11-28 03:32:59,784 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 61 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-11-28 03:32:59,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 72 transitions, 425 flow [2024-11-28 03:32:59,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:32:59,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:32:59,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-11-28 03:32:59,788 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-11-28 03:32:59,788 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 190 flow. Second operand 7 states and 150 transitions. [2024-11-28 03:32:59,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 72 transitions, 425 flow [2024-11-28 03:32:59,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 72 transitions, 423 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:32:59,798 INFO L231 Difference]: Finished difference. Result has 55 places, 41 transitions, 219 flow [2024-11-28 03:32:59,798 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=219, PETRI_PLACES=55, PETRI_TRANSITIONS=41} [2024-11-28 03:32:59,801 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-11-28 03:32:59,802 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 41 transitions, 219 flow [2024-11-28 03:32:59,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 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) [2024-11-28 03:32:59,802 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:32:59,802 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-28 03:32:59,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 03:33:00,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-28 03:33:00,003 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:33:00,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:00,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1073084351, now seen corresponding path program 2 times [2024-11-28 03:33:00,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:00,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221084758] [2024-11-28 03:33:00,004 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:33:00,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:00,029 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:33:00,029 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:33:00,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:00,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221084758] [2024-11-28 03:33:00,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221084758] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:33:00,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685383451] [2024-11-28 03:33:00,227 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:33:00,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:33:00,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:33:00,229 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:33:00,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:33:00,321 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:33:00,321 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:00,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 03:33:00,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:33:00,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 1 [2024-11-28 03:33:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:33:00,574 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:33:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:33:00,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685383451] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:33:00,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:33:00,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-28 03:33:00,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528567941] [2024-11-28 03:33:00,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:33:00,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:33:00,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:00,833 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:33:00,833 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:33:01,190 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-28 03:33:01,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 41 transitions, 219 flow. Second operand has 11 states, 11 states have (on average 17.727272727272727) internal successors, (195), 11 states have internal predecessors, (195), 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) [2024-11-28 03:33:01,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:01,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-28 03:33:01,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:01,549 INFO L124 PetriNetUnfolderBase]: 560/1084 cut-off events. [2024-11-28 03:33:01,550 INFO L125 PetriNetUnfolderBase]: For 474/474 co-relation queries the response was YES. [2024-11-28 03:33:01,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2794 conditions, 1084 events. 560/1084 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5608 event pairs, 321 based on Foata normal form. 0/1020 useless extension candidates. Maximal degree in co-relation 1728. Up to 727 conditions per place. [2024-11-28 03:33:01,562 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 38 selfloop transitions, 10 changer transitions 0/53 dead transitions. [2024-11-28 03:33:01,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 53 transitions, 356 flow [2024-11-28 03:33:01,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:33:01,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:33:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-11-28 03:33:01,564 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-11-28 03:33:01,564 INFO L175 Difference]: Start difference. First operand has 55 places, 41 transitions, 219 flow. Second operand 5 states and 108 transitions. [2024-11-28 03:33:01,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 53 transitions, 356 flow [2024-11-28 03:33:01,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 339 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-28 03:33:01,572 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 218 flow [2024-11-28 03:33:01,572 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2024-11-28 03:33:01,573 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-11-28 03:33:01,573 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 218 flow [2024-11-28 03:33:01,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.727272727272727) internal successors, (195), 11 states have internal predecessors, (195), 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) [2024-11-28 03:33:01,573 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:01,573 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:01,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 03:33:01,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:33:01,779 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:33:01,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:01,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1086772558, now seen corresponding path program 2 times [2024-11-28 03:33:01,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:01,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052381013] [2024-11-28 03:33:01,780 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:33:01,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:01,805 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:33:01,805 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:33:02,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:02,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052381013] [2024-11-28 03:33:02,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052381013] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:33:02,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:33:02,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:33:02,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851796767] [2024-11-28 03:33:02,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:33:02,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:33:02,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:02,090 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:33:02,090 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:33:02,201 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-28 03:33:02,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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) [2024-11-28 03:33:02,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:02,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-28 03:33:02,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:02,499 INFO L124 PetriNetUnfolderBase]: 606/1066 cut-off events. [2024-11-28 03:33:02,499 INFO L125 PetriNetUnfolderBase]: For 1223/1223 co-relation queries the response was YES. [2024-11-28 03:33:02,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3017 conditions, 1066 events. 606/1066 cut-off events. For 1223/1223 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4734 event pairs, 322 based on Foata normal form. 64/1034 useless extension candidates. Maximal degree in co-relation 1799. Up to 684 conditions per place. [2024-11-28 03:33:02,509 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 38 selfloop transitions, 8 changer transitions 0/47 dead transitions. [2024-11-28 03:33:02,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 357 flow [2024-11-28 03:33:02,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:33:02,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:33:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-11-28 03:33:02,512 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-11-28 03:33:02,512 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 218 flow. Second operand 5 states and 92 transitions. [2024-11-28 03:33:02,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 357 flow [2024-11-28 03:33:02,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 47 transitions, 325 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 03:33:02,518 INFO L231 Difference]: Finished difference. Result has 50 places, 37 transitions, 202 flow [2024-11-28 03:33:02,518 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=50, PETRI_TRANSITIONS=37} [2024-11-28 03:33:02,520 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-11-28 03:33:02,520 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 37 transitions, 202 flow [2024-11-28 03:33:02,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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) [2024-11-28 03:33:02,521 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:02,521 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:02,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-28 03:33:02,521 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:33:02,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:02,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1690812900, now seen corresponding path program 1 times [2024-11-28 03:33:02,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:02,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505587229] [2024-11-28 03:33:02,522 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:33:02,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:33:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:33:02,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:02,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505587229] [2024-11-28 03:33:02,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505587229] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:33:02,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826666078] [2024-11-28 03:33:02,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:33:02,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:33:02,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:33:02,835 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:33:02,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:33:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:33:02,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:33:02,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:33:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:33:03,153 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:33:03,293 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 36 treesize of output 32 [2024-11-28 03:33:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:33:03,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826666078] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:33:03,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:33:03,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-28 03:33:03,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195802612] [2024-11-28 03:33:03,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:33:03,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:33:03,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:03,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:33:03,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:33:03,978 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-28 03:33:03,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 202 flow. Second operand has 17 states, 17 states have (on average 14.647058823529411) internal successors, (249), 17 states have internal predecessors, (249), 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) [2024-11-28 03:33:03,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:03,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-28 03:33:03,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:04,497 INFO L124 PetriNetUnfolderBase]: 583/1027 cut-off events. [2024-11-28 03:33:04,497 INFO L125 PetriNetUnfolderBase]: For 850/850 co-relation queries the response was YES. [2024-11-28 03:33:04,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2801 conditions, 1027 events. 583/1027 cut-off events. For 850/850 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4470 event pairs, 305 based on Foata normal form. 16/979 useless extension candidates. Maximal degree in co-relation 1750. Up to 470 conditions per place. [2024-11-28 03:33:04,506 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 67 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2024-11-28 03:33:04,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 79 transitions, 487 flow [2024-11-28 03:33:04,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:33:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:33:04,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-11-28 03:33:04,509 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-11-28 03:33:04,509 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 202 flow. Second operand 8 states and 167 transitions. [2024-11-28 03:33:04,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 79 transitions, 487 flow [2024-11-28 03:33:04,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 465 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 03:33:04,516 INFO L231 Difference]: Finished difference. Result has 55 places, 39 transitions, 228 flow [2024-11-28 03:33:04,516 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=228, PETRI_PLACES=55, PETRI_TRANSITIONS=39} [2024-11-28 03:33:04,517 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-11-28 03:33:04,517 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 39 transitions, 228 flow [2024-11-28 03:33:04,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.647058823529411) internal successors, (249), 17 states have internal predecessors, (249), 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) [2024-11-28 03:33:04,518 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:04,518 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:04,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 03:33:04,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:33:04,718 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:33:04,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:04,719 INFO L85 PathProgramCache]: Analyzing trace with hash -2050053828, now seen corresponding path program 1 times [2024-11-28 03:33:04,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:04,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127155123] [2024-11-28 03:33:04,719 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:33:04,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:33:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:33:04,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:04,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127155123] [2024-11-28 03:33:04,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127155123] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:33:04,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:33:04,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:33:04,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933609294] [2024-11-28 03:33:04,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:33:04,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:33:04,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:04,800 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:33:04,800 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:33:04,819 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:33:04,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 39 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:33:04,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:04,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:33:04,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:05,038 INFO L124 PetriNetUnfolderBase]: 560/1000 cut-off events. [2024-11-28 03:33:05,038 INFO L125 PetriNetUnfolderBase]: For 994/994 co-relation queries the response was YES. [2024-11-28 03:33:05,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2809 conditions, 1000 events. 560/1000 cut-off events. For 994/994 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4393 event pairs, 159 based on Foata normal form. 2/1002 useless extension candidates. Maximal degree in co-relation 1731. Up to 796 conditions per place. [2024-11-28 03:33:05,045 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 44 selfloop transitions, 5 changer transitions 1/52 dead transitions. [2024-11-28 03:33:05,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 52 transitions, 369 flow [2024-11-28 03:33:05,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:33:05,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:33:05,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-11-28 03:33:05,047 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-11-28 03:33:05,047 INFO L175 Difference]: Start difference. First operand has 55 places, 39 transitions, 228 flow. Second operand 3 states and 84 transitions. [2024-11-28 03:33:05,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 52 transitions, 369 flow [2024-11-28 03:33:05,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 353 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-28 03:33:05,055 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 245 flow [2024-11-28 03:33:05,055 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=245, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2024-11-28 03:33:05,056 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-11-28 03:33:05,056 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 245 flow [2024-11-28 03:33:05,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:33:05,056 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:05,056 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:05,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 03:33:05,057 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:33:05,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:05,058 INFO L85 PathProgramCache]: Analyzing trace with hash 748437236, now seen corresponding path program 2 times [2024-11-28 03:33:05,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:05,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168872459] [2024-11-28 03:33:05,059 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:33:05,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:05,082 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:33:05,082 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:33:05,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:05,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168872459] [2024-11-28 03:33:05,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168872459] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:33:05,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424183847] [2024-11-28 03:33:05,301 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:33:05,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:33:05,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:33:05,305 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:33:05,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:33:05,397 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:33:05,397 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:05,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 03:33:05,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:33:05,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 1 [2024-11-28 03:33:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:33:05,745 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:33:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:33:06,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424183847] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:33:06,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:33:06,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-28 03:33:06,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748045205] [2024-11-28 03:33:06,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:33:06,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:33:06,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:06,052 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:33:06,054 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:33:06,316 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-28 03:33:06,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 245 flow. Second operand has 11 states, 11 states have (on average 16.09090909090909) internal successors, (177), 11 states have internal predecessors, (177), 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) [2024-11-28 03:33:06,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:06,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-28 03:33:06,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:06,703 INFO L124 PetriNetUnfolderBase]: 560/984 cut-off events. [2024-11-28 03:33:06,703 INFO L125 PetriNetUnfolderBase]: For 1064/1064 co-relation queries the response was YES. [2024-11-28 03:33:06,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2849 conditions, 984 events. 560/984 cut-off events. For 1064/1064 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4265 event pairs, 196 based on Foata normal form. 16/1000 useless extension candidates. Maximal degree in co-relation 1749. Up to 523 conditions per place. [2024-11-28 03:33:06,710 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 43 selfloop transitions, 8 changer transitions 0/52 dead transitions. [2024-11-28 03:33:06,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 52 transitions, 414 flow [2024-11-28 03:33:06,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:33:06,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:33:06,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-11-28 03:33:06,711 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.445 [2024-11-28 03:33:06,711 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 245 flow. Second operand 5 states and 89 transitions. [2024-11-28 03:33:06,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 52 transitions, 414 flow [2024-11-28 03:33:06,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 52 transitions, 405 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-28 03:33:06,715 INFO L231 Difference]: Finished difference. Result has 55 places, 40 transitions, 248 flow [2024-11-28 03:33:06,716 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=55, PETRI_TRANSITIONS=40} [2024-11-28 03:33:06,716 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-11-28 03:33:06,716 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 40 transitions, 248 flow [2024-11-28 03:33:06,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.09090909090909) internal successors, (177), 11 states have internal predecessors, (177), 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) [2024-11-28 03:33:06,717 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:06,717 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:06,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 03:33:06,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 03:33:06,922 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:33:06,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:06,923 INFO L85 PathProgramCache]: Analyzing trace with hash -964855040, now seen corresponding path program 1 times [2024-11-28 03:33:06,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:06,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998941025] [2024-11-28 03:33:06,923 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:33:06,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:33:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:33:07,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:07,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998941025] [2024-11-28 03:33:07,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998941025] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:33:07,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:33:07,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:33:07,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090885980] [2024-11-28 03:33:07,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:33:07,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:33:07,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:07,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:33:07,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:33:07,128 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:33:07,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 40 transitions, 248 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 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) [2024-11-28 03:33:07,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:07,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:33:07,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:07,555 INFO L124 PetriNetUnfolderBase]: 697/1248 cut-off events. [2024-11-28 03:33:07,555 INFO L125 PetriNetUnfolderBase]: For 1603/1603 co-relation queries the response was YES. [2024-11-28 03:33:07,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3754 conditions, 1248 events. 697/1248 cut-off events. For 1603/1603 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6318 event pairs, 219 based on Foata normal form. 52/1300 useless extension candidates. Maximal degree in co-relation 2238. Up to 572 conditions per place. [2024-11-28 03:33:07,565 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 79 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2024-11-28 03:33:07,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 94 transitions, 721 flow [2024-11-28 03:33:07,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:33:07,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:33:07,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-11-28 03:33:07,566 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-11-28 03:33:07,567 INFO L175 Difference]: Start difference. First operand has 55 places, 40 transitions, 248 flow. Second operand 6 states and 162 transitions. [2024-11-28 03:33:07,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 94 transitions, 721 flow [2024-11-28 03:33:07,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 94 transitions, 681 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 03:33:07,574 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 368 flow [2024-11-28 03:33:07,574 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=368, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2024-11-28 03:33:07,575 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-11-28 03:33:07,575 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 368 flow [2024-11-28 03:33:07,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 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) [2024-11-28 03:33:07,575 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:07,575 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:07,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-28 03:33:07,576 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:33:07,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:07,576 INFO L85 PathProgramCache]: Analyzing trace with hash 188723548, now seen corresponding path program 2 times [2024-11-28 03:33:07,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:07,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648242698] [2024-11-28 03:33:07,577 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:33:07,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:07,597 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:33:07,597 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:07,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:33:07,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:07,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648242698] [2024-11-28 03:33:07,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648242698] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:33:07,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:33:07,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:33:07,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135527846] [2024-11-28 03:33:07,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:33:07,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:33:07,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:07,676 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:33:07,676 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:33:07,676 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:33:07,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 368 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-11-28 03:33:07,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:07,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:33:07,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:07,973 INFO L124 PetriNetUnfolderBase]: 737/1316 cut-off events. [2024-11-28 03:33:07,973 INFO L125 PetriNetUnfolderBase]: For 2715/2715 co-relation queries the response was YES. [2024-11-28 03:33:07,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4658 conditions, 1316 events. 737/1316 cut-off events. For 2715/2715 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 6385 event pairs, 212 based on Foata normal form. 14/1330 useless extension candidates. Maximal degree in co-relation 2903. Up to 1057 conditions per place. [2024-11-28 03:33:07,984 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 59 selfloop transitions, 9 changer transitions 1/70 dead transitions. [2024-11-28 03:33:07,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 609 flow [2024-11-28 03:33:07,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:33:07,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:33:07,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-11-28 03:33:07,986 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-11-28 03:33:07,986 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 368 flow. Second operand 4 states and 105 transitions. [2024-11-28 03:33:07,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 609 flow [2024-11-28 03:33:07,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 70 transitions, 588 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-28 03:33:07,996 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 430 flow [2024-11-28 03:33:07,996 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=430, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2024-11-28 03:33:07,997 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-11-28 03:33:07,997 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 430 flow [2024-11-28 03:33:07,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-11-28 03:33:07,997 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:07,997 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:07,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-28 03:33:07,998 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:33:07,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:07,998 INFO L85 PathProgramCache]: Analyzing trace with hash 153578844, now seen corresponding path program 3 times [2024-11-28 03:33:07,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:07,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910925627] [2024-11-28 03:33:07,998 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:33:07,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:08,018 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:33:08,019 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:33:08,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:08,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910925627] [2024-11-28 03:33:08,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910925627] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:33:08,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:33:08,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:33:08,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658652946] [2024-11-28 03:33:08,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:33:08,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:33:08,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:08,148 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:33:08,148 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:33:08,148 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:33:08,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 430 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-11-28 03:33:08,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:08,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:33:08,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:08,509 INFO L124 PetriNetUnfolderBase]: 729/1308 cut-off events. [2024-11-28 03:33:08,509 INFO L125 PetriNetUnfolderBase]: For 3144/3144 co-relation queries the response was YES. [2024-11-28 03:33:08,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4857 conditions, 1308 events. 729/1308 cut-off events. For 3144/3144 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 6422 event pairs, 330 based on Foata normal form. 8/1316 useless extension candidates. Maximal degree in co-relation 3088. Up to 935 conditions per place. [2024-11-28 03:33:08,521 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 65 selfloop transitions, 11 changer transitions 1/78 dead transitions. [2024-11-28 03:33:08,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 78 transitions, 739 flow [2024-11-28 03:33:08,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:33:08,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:33:08,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-11-28 03:33:08,522 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-11-28 03:33:08,522 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 430 flow. Second operand 4 states and 103 transitions. [2024-11-28 03:33:08,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 78 transitions, 739 flow [2024-11-28 03:33:08,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 78 transitions, 729 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-11-28 03:33:08,534 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 470 flow [2024-11-28 03:33:08,535 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=470, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2024-11-28 03:33:08,535 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-11-28 03:33:08,535 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 470 flow [2024-11-28 03:33:08,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-11-28 03:33:08,536 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:08,536 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:08,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-28 03:33:08,537 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:33:08,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:08,537 INFO L85 PathProgramCache]: Analyzing trace with hash 147413604, now seen corresponding path program 4 times [2024-11-28 03:33:08,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:08,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806696566] [2024-11-28 03:33:08,538 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:33:08,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:08,559 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:33:08,559 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:33:08,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:08,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806696566] [2024-11-28 03:33:08,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806696566] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:33:08,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860351830] [2024-11-28 03:33:08,794 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:33:08,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:33:08,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:33:08,798 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:33:08,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:33:08,891 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:33:08,892 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:08,893 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:33:08,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:33:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:33:08,965 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:33:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:33:09,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860351830] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:33:09,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:33:09,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 10 [2024-11-28 03:33:09,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914322977] [2024-11-28 03:33:09,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:33:09,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:33:09,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:09,066 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:33:09,066 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:33:09,066 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:33:09,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 470 flow. Second operand has 10 states, 10 states have (on average 19.2) internal successors, (192), 10 states have internal predecessors, (192), 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) [2024-11-28 03:33:09,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:09,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:33:09,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:09,961 INFO L124 PetriNetUnfolderBase]: 1005/1790 cut-off events. [2024-11-28 03:33:09,962 INFO L125 PetriNetUnfolderBase]: For 5859/5859 co-relation queries the response was YES. [2024-11-28 03:33:09,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7242 conditions, 1790 events. 1005/1790 cut-off events. For 5859/5859 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9766 event pairs, 166 based on Foata normal form. 40/1830 useless extension candidates. Maximal degree in co-relation 5295. Up to 526 conditions per place. [2024-11-28 03:33:09,981 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 92 selfloop transitions, 70 changer transitions 3/166 dead transitions. [2024-11-28 03:33:09,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 166 transitions, 1544 flow [2024-11-28 03:33:09,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 03:33:09,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 03:33:09,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 317 transitions. [2024-11-28 03:33:09,983 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6096153846153847 [2024-11-28 03:33:09,984 INFO L175 Difference]: Start difference. First operand has 69 places, 55 transitions, 470 flow. Second operand 13 states and 317 transitions. [2024-11-28 03:33:09,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 166 transitions, 1544 flow [2024-11-28 03:33:10,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 166 transitions, 1498 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-28 03:33:10,003 INFO L231 Difference]: Finished difference. Result has 90 places, 103 transitions, 1169 flow [2024-11-28 03:33:10,005 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1169, PETRI_PLACES=90, PETRI_TRANSITIONS=103} [2024-11-28 03:33:10,006 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2024-11-28 03:33:10,006 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 103 transitions, 1169 flow [2024-11-28 03:33:10,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.2) internal successors, (192), 10 states have internal predecessors, (192), 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) [2024-11-28 03:33:10,007 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:10,007 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:10,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 03:33:10,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 03:33:10,211 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:33:10,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:10,212 INFO L85 PathProgramCache]: Analyzing trace with hash -117938616, now seen corresponding path program 5 times [2024-11-28 03:33:10,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:10,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247910256] [2024-11-28 03:33:10,212 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:33:10,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:10,230 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:33:10,231 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:10,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:33:10,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:10,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247910256] [2024-11-28 03:33:10,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247910256] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:33:10,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:33:10,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:33:10,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683000802] [2024-11-28 03:33:10,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:33:10,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:33:10,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:10,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:33:10,347 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:33:10,347 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:33:10,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 103 transitions, 1169 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 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) [2024-11-28 03:33:10,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:10,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:33:10,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:10,748 INFO L124 PetriNetUnfolderBase]: 999/1780 cut-off events. [2024-11-28 03:33:10,748 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2024-11-28 03:33:10,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9401 conditions, 1780 events. 999/1780 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9582 event pairs, 346 based on Foata normal form. 4/1784 useless extension candidates. Maximal degree in co-relation 7853. Up to 1089 conditions per place. [2024-11-28 03:33:10,767 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 97 selfloop transitions, 31 changer transitions 2/131 dead transitions. [2024-11-28 03:33:10,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 131 transitions, 1692 flow [2024-11-28 03:33:10,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:33:10,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:33:10,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-11-28 03:33:10,769 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-11-28 03:33:10,769 INFO L175 Difference]: Start difference. First operand has 90 places, 103 transitions, 1169 flow. Second operand 5 states and 128 transitions. [2024-11-28 03:33:10,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 131 transitions, 1692 flow [2024-11-28 03:33:10,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 131 transitions, 1630 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-11-28 03:33:10,823 INFO L231 Difference]: Finished difference. Result has 95 places, 109 transitions, 1287 flow [2024-11-28 03:33:10,823 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1113, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1287, PETRI_PLACES=95, PETRI_TRANSITIONS=109} [2024-11-28 03:33:10,824 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-11-28 03:33:10,824 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 109 transitions, 1287 flow [2024-11-28 03:33:10,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 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) [2024-11-28 03:33:10,824 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:10,824 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:10,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-28 03:33:10,825 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:33:10,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:10,825 INFO L85 PathProgramCache]: Analyzing trace with hash 506493428, now seen corresponding path program 6 times [2024-11-28 03:33:10,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:10,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390597276] [2024-11-28 03:33:10,826 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:33:10,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:10,844 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:33:10,844 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:33:10,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:10,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390597276] [2024-11-28 03:33:10,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390597276] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:33:10,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:33:10,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:33:10,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096319791] [2024-11-28 03:33:10,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:33:10,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:33:10,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:10,924 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:33:10,924 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:33:10,925 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:33:10,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 109 transitions, 1287 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-11-28 03:33:10,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:10,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:33:10,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:11,430 INFO L124 PetriNetUnfolderBase]: 997/1768 cut-off events. [2024-11-28 03:33:11,431 INFO L125 PetriNetUnfolderBase]: For 12338/12338 co-relation queries the response was YES. [2024-11-28 03:33:11,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9411 conditions, 1768 events. 997/1768 cut-off events. For 12338/12338 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9421 event pairs, 355 based on Foata normal form. 14/1782 useless extension candidates. Maximal degree in co-relation 8053. Up to 1089 conditions per place. [2024-11-28 03:33:11,449 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 88 selfloop transitions, 37 changer transitions 2/128 dead transitions. [2024-11-28 03:33:11,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 128 transitions, 1708 flow [2024-11-28 03:33:11,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:33:11,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:33:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-11-28 03:33:11,450 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-11-28 03:33:11,451 INFO L175 Difference]: Start difference. First operand has 95 places, 109 transitions, 1287 flow. Second operand 4 states and 104 transitions. [2024-11-28 03:33:11,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 128 transitions, 1708 flow [2024-11-28 03:33:11,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 128 transitions, 1676 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-28 03:33:11,505 INFO L231 Difference]: Finished difference. Result has 98 places, 111 transitions, 1374 flow [2024-11-28 03:33:11,505 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1374, PETRI_PLACES=98, PETRI_TRANSITIONS=111} [2024-11-28 03:33:11,506 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-11-28 03:33:11,506 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 111 transitions, 1374 flow [2024-11-28 03:33:11,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-11-28 03:33:11,507 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:11,507 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] [2024-11-28 03:33:11,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-28 03:33:11,507 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:33:11,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:11,508 INFO L85 PathProgramCache]: Analyzing trace with hash 350512329, now seen corresponding path program 1 times [2024-11-28 03:33:11,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:11,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348865020] [2024-11-28 03:33:11,508 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:33:11,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:33:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:33:11,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:11,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348865020] [2024-11-28 03:33:11,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348865020] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:33:11,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:33:11,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-28 03:33:11,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030558424] [2024-11-28 03:33:11,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:33:11,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:33:11,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:11,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:33:11,927 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:33:11,928 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:33:11,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 111 transitions, 1374 flow. Second operand has 10 states, 10 states have (on average 18.0) internal successors, (180), 10 states have internal predecessors, (180), 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) [2024-11-28 03:33:11,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:11,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:33:11,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:12,812 INFO L124 PetriNetUnfolderBase]: 1057/1863 cut-off events. [2024-11-28 03:33:12,812 INFO L125 PetriNetUnfolderBase]: For 13371/13371 co-relation queries the response was YES. [2024-11-28 03:33:12,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10039 conditions, 1863 events. 1057/1863 cut-off events. For 13371/13371 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9758 event pairs, 215 based on Foata normal form. 8/1871 useless extension candidates. Maximal degree in co-relation 9012. Up to 658 conditions per place. [2024-11-28 03:33:12,830 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 109 selfloop transitions, 67 changer transitions 0/177 dead transitions. [2024-11-28 03:33:12,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 177 transitions, 2347 flow [2024-11-28 03:33:12,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:33:12,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:33:12,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-11-28 03:33:12,833 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-11-28 03:33:12,833 INFO L175 Difference]: Start difference. First operand has 98 places, 111 transitions, 1374 flow. Second operand 10 states and 232 transitions. [2024-11-28 03:33:12,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 177 transitions, 2347 flow [2024-11-28 03:33:12,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 177 transitions, 2260 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-28 03:33:12,888 INFO L231 Difference]: Finished difference. Result has 108 places, 129 transitions, 1734 flow [2024-11-28 03:33:12,889 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1299, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1734, PETRI_PLACES=108, PETRI_TRANSITIONS=129} [2024-11-28 03:33:12,889 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-11-28 03:33:12,889 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 129 transitions, 1734 flow [2024-11-28 03:33:12,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.0) internal successors, (180), 10 states have internal predecessors, (180), 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) [2024-11-28 03:33:12,890 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:12,890 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] [2024-11-28 03:33:12,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-28 03:33:12,890 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:33:12,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:12,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1745961605, now seen corresponding path program 2 times [2024-11-28 03:33:12,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:12,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377281578] [2024-11-28 03:33:12,891 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:33:12,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:12,912 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:33:12,912 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:33:13,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:13,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377281578] [2024-11-28 03:33:13,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377281578] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:33:13,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195649598] [2024-11-28 03:33:13,030 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:33:13,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:33:13,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:33:13,033 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:33:13,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:33:13,133 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:33:13,133 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:13,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:33:13,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:33:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:33:13,183 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:33:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:33:13,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195649598] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:33:13,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:33:13,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2024-11-28 03:33:13,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673560828] [2024-11-28 03:33:13,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:33:13,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:33:13,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:13,269 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:33:13,269 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:33:13,269 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:33:13,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 129 transitions, 1734 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2024-11-28 03:33:13,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:13,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:33:13,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:13,693 INFO L124 PetriNetUnfolderBase]: 1045/1833 cut-off events. [2024-11-28 03:33:13,693 INFO L125 PetriNetUnfolderBase]: For 16019/16019 co-relation queries the response was YES. [2024-11-28 03:33:13,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10944 conditions, 1833 events. 1045/1833 cut-off events. For 16019/16019 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9609 event pairs, 103 based on Foata normal form. 24/1857 useless extension candidates. Maximal degree in co-relation 9738. Up to 1066 conditions per place. [2024-11-28 03:33:13,707 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 122 selfloop transitions, 51 changer transitions 0/174 dead transitions. [2024-11-28 03:33:13,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 174 transitions, 2591 flow [2024-11-28 03:33:13,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:33:13,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:33:13,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-11-28 03:33:13,708 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.66875 [2024-11-28 03:33:13,708 INFO L175 Difference]: Start difference. First operand has 108 places, 129 transitions, 1734 flow. Second operand 4 states and 107 transitions. [2024-11-28 03:33:13,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 174 transitions, 2591 flow [2024-11-28 03:33:13,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 174 transitions, 2474 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-11-28 03:33:13,789 INFO L231 Difference]: Finished difference. Result has 110 places, 131 transitions, 1874 flow [2024-11-28 03:33:13,790 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1874, PETRI_PLACES=110, PETRI_TRANSITIONS=131} [2024-11-28 03:33:13,790 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-11-28 03:33:13,790 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 131 transitions, 1874 flow [2024-11-28 03:33:13,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2024-11-28 03:33:13,791 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:13,791 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] [2024-11-28 03:33:13,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 03:33:13,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:33:13,992 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:33:13,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:13,993 INFO L85 PathProgramCache]: Analyzing trace with hash -337724647, now seen corresponding path program 3 times [2024-11-28 03:33:13,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:13,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384413264] [2024-11-28 03:33:13,993 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:33:13,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:14,011 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:33:14,011 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:33:14,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:14,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384413264] [2024-11-28 03:33:14,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384413264] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:33:14,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:33:14,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:33:14,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607813316] [2024-11-28 03:33:14,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:33:14,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:33:14,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:14,118 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:33:14,118 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:33:14,118 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:33:14,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 131 transitions, 1874 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2024-11-28 03:33:14,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:14,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:33:14,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:14,615 INFO L124 PetriNetUnfolderBase]: 983/1699 cut-off events. [2024-11-28 03:33:14,615 INFO L125 PetriNetUnfolderBase]: For 19164/19164 co-relation queries the response was YES. [2024-11-28 03:33:14,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10959 conditions, 1699 events. 983/1699 cut-off events. For 19164/19164 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8488 event pairs, 326 based on Foata normal form. 18/1717 useless extension candidates. Maximal degree in co-relation 10071. Up to 1162 conditions per place. [2024-11-28 03:33:14,632 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 111 selfloop transitions, 31 changer transitions 8/151 dead transitions. [2024-11-28 03:33:14,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 151 transitions, 2308 flow [2024-11-28 03:33:14,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:33:14,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:33:14,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-11-28 03:33:14,633 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-11-28 03:33:14,633 INFO L175 Difference]: Start difference. First operand has 110 places, 131 transitions, 1874 flow. Second operand 5 states and 124 transitions. [2024-11-28 03:33:14,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 151 transitions, 2308 flow [2024-11-28 03:33:14,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 151 transitions, 2243 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-28 03:33:14,706 INFO L231 Difference]: Finished difference. Result has 115 places, 131 transitions, 1917 flow [2024-11-28 03:33:14,706 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1814, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1917, PETRI_PLACES=115, PETRI_TRANSITIONS=131} [2024-11-28 03:33:14,707 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 74 predicate places. [2024-11-28 03:33:14,707 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 131 transitions, 1917 flow [2024-11-28 03:33:14,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2024-11-28 03:33:14,707 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:14,707 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] [2024-11-28 03:33:14,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-28 03:33:14,707 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:33:14,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:14,708 INFO L85 PathProgramCache]: Analyzing trace with hash 522640693, now seen corresponding path program 1 times [2024-11-28 03:33:14,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:14,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225441278] [2024-11-28 03:33:14,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:33:14,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:33:15,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:33:15,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:15,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225441278] [2024-11-28 03:33:15,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225441278] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:33:15,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709896606] [2024-11-28 03:33:15,125 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:33:15,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:33:15,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:33:15,128 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:33:15,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:33:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:33:15,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 03:33:15,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:33:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:33:15,675 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:33:16,135 INFO L349 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2024-11-28 03:33:16,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 31 [2024-11-28 03:33:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:33:16,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709896606] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:33:16,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:33:16,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2024-11-28 03:33:16,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509690289] [2024-11-28 03:33:16,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:33:16,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 03:33:16,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:16,370 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 03:33:16,370 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2024-11-28 03:33:17,615 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:33:17,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 131 transitions, 1917 flow. Second operand has 25 states, 25 states have (on average 18.64) internal successors, (466), 25 states have internal predecessors, (466), 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) [2024-11-28 03:33:17,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:17,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:33:17,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:20,984 INFO L124 PetriNetUnfolderBase]: 1605/2783 cut-off events. [2024-11-28 03:33:20,984 INFO L125 PetriNetUnfolderBase]: For 26286/26286 co-relation queries the response was YES. [2024-11-28 03:33:20,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17022 conditions, 2783 events. 1605/2783 cut-off events. For 26286/26286 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14638 event pairs, 110 based on Foata normal form. 9/2792 useless extension candidates. Maximal degree in co-relation 16020. Up to 627 conditions per place. [2024-11-28 03:33:21,003 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 173 selfloop transitions, 96 changer transitions 225/495 dead transitions. [2024-11-28 03:33:21,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 495 transitions, 6236 flow [2024-11-28 03:33:21,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-28 03:33:21,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-11-28 03:33:21,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 1064 transitions. [2024-11-28 03:33:21,009 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5659574468085107 [2024-11-28 03:33:21,009 INFO L175 Difference]: Start difference. First operand has 115 places, 131 transitions, 1917 flow. Second operand 47 states and 1064 transitions. [2024-11-28 03:33:21,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 495 transitions, 6236 flow [2024-11-28 03:33:21,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 495 transitions, 6090 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-11-28 03:33:21,112 INFO L231 Difference]: Finished difference. Result has 175 places, 155 transitions, 2222 flow [2024-11-28 03:33:21,113 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=2222, PETRI_PLACES=175, PETRI_TRANSITIONS=155} [2024-11-28 03:33:21,113 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-11-28 03:33:21,114 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 155 transitions, 2222 flow [2024-11-28 03:33:21,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.64) internal successors, (466), 25 states have internal predecessors, (466), 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) [2024-11-28 03:33:21,114 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:21,114 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:21,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 03:33:21,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 03:33:21,319 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:33:21,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:21,319 INFO L85 PathProgramCache]: Analyzing trace with hash -993244505, now seen corresponding path program 2 times [2024-11-28 03:33:21,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:21,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616411677] [2024-11-28 03:33:21,320 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:33:21,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:21,361 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:33:21,363 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:21,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:33:21,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:21,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616411677] [2024-11-28 03:33:21,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616411677] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:33:21,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447829602] [2024-11-28 03:33:21,765 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:33:21,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:33:21,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:33:21,768 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:33:21,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:33:21,901 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:33:21,901 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:21,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:33:21,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:33:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:33:21,945 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:33:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:33:22,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447829602] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:33:22,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:33:22,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 14 [2024-11-28 03:33:22,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999865710] [2024-11-28 03:33:22,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:33:22,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:33:22,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:22,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:33:22,121 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:33:22,122 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:33:22,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 155 transitions, 2222 flow. Second operand has 14 states, 14 states have (on average 18.571428571428573) internal successors, (260), 14 states have internal predecessors, (260), 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) [2024-11-28 03:33:22,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:22,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:33:22,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:23,386 INFO L124 PetriNetUnfolderBase]: 1133/1930 cut-off events. [2024-11-28 03:33:23,386 INFO L125 PetriNetUnfolderBase]: For 30471/30471 co-relation queries the response was YES. [2024-11-28 03:33:23,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13915 conditions, 1930 events. 1133/1930 cut-off events. For 30471/30471 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8944 event pairs, 178 based on Foata normal form. 162/2092 useless extension candidates. Maximal degree in co-relation 13852. Up to 609 conditions per place. [2024-11-28 03:33:23,411 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 218 selfloop transitions, 94 changer transitions 0/313 dead transitions. [2024-11-28 03:33:23,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 313 transitions, 4784 flow [2024-11-28 03:33:23,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 03:33:23,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 03:33:23,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 377 transitions. [2024-11-28 03:33:23,413 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6283333333333333 [2024-11-28 03:33:23,413 INFO L175 Difference]: Start difference. First operand has 175 places, 155 transitions, 2222 flow. Second operand 15 states and 377 transitions. [2024-11-28 03:33:23,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 313 transitions, 4784 flow [2024-11-28 03:33:23,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 313 transitions, 4239 flow, removed 239 selfloop flow, removed 28 redundant places. [2024-11-28 03:33:23,494 INFO L231 Difference]: Finished difference. Result has 134 places, 180 transitions, 2683 flow [2024-11-28 03:33:23,494 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1660, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2683, PETRI_PLACES=134, PETRI_TRANSITIONS=180} [2024-11-28 03:33:23,494 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 93 predicate places. [2024-11-28 03:33:23,494 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 180 transitions, 2683 flow [2024-11-28 03:33:23,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.571428571428573) internal successors, (260), 14 states have internal predecessors, (260), 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) [2024-11-28 03:33:23,495 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:23,495 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:23,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 03:33:23,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 03:33:23,696 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:33:23,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:23,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1127465353, now seen corresponding path program 3 times [2024-11-28 03:33:23,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:23,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875442610] [2024-11-28 03:33:23,697 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:33:23,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:23,819 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:33:23,820 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:33:26,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:26,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875442610] [2024-11-28 03:33:26,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875442610] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:33:26,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799618578] [2024-11-28 03:33:26,347 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:33:26,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:33:26,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:33:26,351 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:33:26,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:33:26,588 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:33:26,588 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:26,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 03:33:26,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:33:27,198 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:33:27,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2024-11-28 03:33:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:33:27,257 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:33:28,254 INFO L349 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2024-11-28 03:33:28,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2024-11-28 03:33:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:33:29,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799618578] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:33:29,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:33:29,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 32 [2024-11-28 03:33:29,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275690740] [2024-11-28 03:33:29,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:33:29,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 03:33:29,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:29,582 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 03:33:29,583 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 03:33:31,667 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:33:31,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 180 transitions, 2683 flow. Second operand has 33 states, 33 states have (on average 18.363636363636363) internal successors, (606), 33 states have internal predecessors, (606), 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) [2024-11-28 03:33:31,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:31,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:33:31,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:34,609 INFO L124 PetriNetUnfolderBase]: 2233/3825 cut-off events. [2024-11-28 03:33:34,610 INFO L125 PetriNetUnfolderBase]: For 47641/47641 co-relation queries the response was YES. [2024-11-28 03:33:34,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26783 conditions, 3825 events. 2233/3825 cut-off events. For 47641/47641 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 20565 event pairs, 161 based on Foata normal form. 3/3828 useless extension candidates. Maximal degree in co-relation 26733. Up to 1252 conditions per place. [2024-11-28 03:33:34,655 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 281 selfloop transitions, 227 changer transitions 13/522 dead transitions. [2024-11-28 03:33:34,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 522 transitions, 8033 flow [2024-11-28 03:33:34,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 03:33:34,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-28 03:33:34,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 716 transitions. [2024-11-28 03:33:34,657 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5966666666666667 [2024-11-28 03:33:34,658 INFO L175 Difference]: Start difference. First operand has 134 places, 180 transitions, 2683 flow. Second operand 30 states and 716 transitions. [2024-11-28 03:33:34,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 522 transitions, 8033 flow [2024-11-28 03:33:34,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 522 transitions, 7811 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-11-28 03:33:34,780 INFO L231 Difference]: Finished difference. Result has 165 places, 334 transitions, 5292 flow [2024-11-28 03:33:34,780 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2575, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5292, PETRI_PLACES=165, PETRI_TRANSITIONS=334} [2024-11-28 03:33:34,781 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-11-28 03:33:34,781 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 334 transitions, 5292 flow [2024-11-28 03:33:34,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 18.363636363636363) internal successors, (606), 33 states have internal predecessors, (606), 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) [2024-11-28 03:33:34,782 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:34,782 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:34,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 03:33:34,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-28 03:33:34,982 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:33:34,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:34,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1148158495, now seen corresponding path program 4 times [2024-11-28 03:33:34,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:34,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117875703] [2024-11-28 03:33:34,983 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:33:34,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:35,054 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:33:35,055 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:33:37,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:37,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117875703] [2024-11-28 03:33:37,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117875703] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:33:37,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969608549] [2024-11-28 03:33:37,102 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:33:37,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:33:37,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:33:37,104 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:33:37,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:33:37,247 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:33:37,247 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:37,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 03:33:37,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:33:37,818 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:33:37,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2024-11-28 03:33:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:33:37,857 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:33:38,647 INFO L349 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2024-11-28 03:33:38,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2024-11-28 03:33:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:33:39,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969608549] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:33:39,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:33:39,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 30 [2024-11-28 03:33:39,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104345230] [2024-11-28 03:33:39,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:33:39,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 03:33:39,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:39,815 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 03:33:39,815 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2024-11-28 03:33:41,729 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:33:41,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 334 transitions, 5292 flow. Second operand has 31 states, 31 states have (on average 18.580645161290324) internal successors, (576), 31 states have internal predecessors, (576), 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) [2024-11-28 03:33:41,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:41,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:33:41,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:46,814 INFO L124 PetriNetUnfolderBase]: 6441/11217 cut-off events. [2024-11-28 03:33:46,815 INFO L125 PetriNetUnfolderBase]: For 150771/150771 co-relation queries the response was YES. [2024-11-28 03:33:46,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80126 conditions, 11217 events. 6441/11217 cut-off events. For 150771/150771 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 74807 event pairs, 413 based on Foata normal form. 2/11219 useless extension candidates. Maximal degree in co-relation 80070. Up to 2862 conditions per place. [2024-11-28 03:33:46,914 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 426 selfloop transitions, 620 changer transitions 8/1055 dead transitions. [2024-11-28 03:33:46,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 1055 transitions, 16931 flow [2024-11-28 03:33:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-28 03:33:46,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-28 03:33:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 894 transitions. [2024-11-28 03:33:46,917 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6385714285714286 [2024-11-28 03:33:46,917 INFO L175 Difference]: Start difference. First operand has 165 places, 334 transitions, 5292 flow. Second operand 35 states and 894 transitions. [2024-11-28 03:33:46,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 1055 transitions, 16931 flow [2024-11-28 03:33:47,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 1055 transitions, 15733 flow, removed 596 selfloop flow, removed 3 redundant places. [2024-11-28 03:33:47,389 INFO L231 Difference]: Finished difference. Result has 204 places, 796 transitions, 12548 flow [2024-11-28 03:33:47,389 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4992, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=12548, PETRI_PLACES=204, PETRI_TRANSITIONS=796} [2024-11-28 03:33:47,390 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-11-28 03:33:47,390 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 796 transitions, 12548 flow [2024-11-28 03:33:47,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 18.580645161290324) internal successors, (576), 31 states have internal predecessors, (576), 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) [2024-11-28 03:33:47,390 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:47,390 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:47,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 03:33:47,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-28 03:33:47,591 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:33:47,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:47,592 INFO L85 PathProgramCache]: Analyzing trace with hash -141903973, now seen corresponding path program 5 times [2024-11-28 03:33:47,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:47,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493679897] [2024-11-28 03:33:47,592 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:33:47,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:47,668 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:33:47,669 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:33:51,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:51,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493679897] [2024-11-28 03:33:51,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493679897] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:33:51,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060609648] [2024-11-28 03:33:51,740 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:33:51,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:33:51,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:33:51,742 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:33:51,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 03:33:51,897 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:33:51,897 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:51,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-28 03:33:51,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:33:52,034 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 15 treesize of output 1 [2024-11-28 03:33:52,880 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:33:52,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 76 [2024-11-28 03:33:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:33:53,042 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:33:54,599 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 320 treesize of output 280 [2024-11-28 03:33:57,321 INFO L349 Elim1Store]: treesize reduction 5, result has 99.1 percent of original size [2024-11-28 03:33:57,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 19 new quantified variables, introduced 55 case distinctions, treesize of input 4677 treesize of output 2908 [2024-11-28 03:41:34,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2024-11-28 03:41:34,423 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-28 03:41:34,424 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-28 03:41:34,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 03:41:34,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 03:41:34,626 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:275) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:499) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:484) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:590) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:395) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:267) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:325) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 69 more [2024-11-28 03:41:34,634 INFO L158 Benchmark]: Toolchain (without parser) took 528461.21ms. Allocated memory was 117.4MB in the beginning and 2.1GB in the end (delta: 2.0GB). Free memory was 93.7MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. [2024-11-28 03:41:34,634 INFO L158 Benchmark]: CDTParser took 0.55ms. Allocated memory is still 167.8MB. Free memory is still 103.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:41:34,635 INFO L158 Benchmark]: CACSL2BoogieTranslator took 407.90ms. Allocated memory is still 117.4MB. Free memory was 93.3MB in the beginning and 81.4MB in the end (delta: 11.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 03:41:34,635 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.60ms. Allocated memory is still 117.4MB. Free memory was 81.4MB in the beginning and 79.3MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:41:34,635 INFO L158 Benchmark]: Boogie Preprocessor took 52.26ms. Allocated memory is still 117.4MB. Free memory was 79.3MB in the beginning and 77.4MB in the end (delta: 1.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 03:41:34,635 INFO L158 Benchmark]: RCFGBuilder took 1150.67ms. Allocated memory is still 117.4MB. Free memory was 77.4MB in the beginning and 84.6MB in the end (delta: -7.2MB). Peak memory consumption was 49.3MB. Max. memory is 16.1GB. [2024-11-28 03:41:34,636 INFO L158 Benchmark]: TraceAbstraction took 526784.26ms. Allocated memory was 117.4MB in the beginning and 2.1GB in the end (delta: 2.0GB). Free memory was 84.0MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. [2024-11-28 03:41:34,639 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.55ms. Allocated memory is still 167.8MB. Free memory is still 103.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 407.90ms. Allocated memory is still 117.4MB. Free memory was 93.3MB in the beginning and 81.4MB in the end (delta: 11.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.60ms. Allocated memory is still 117.4MB. Free memory was 81.4MB in the beginning and 79.3MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 52.26ms. Allocated memory is still 117.4MB. Free memory was 79.3MB in the beginning and 77.4MB in the end (delta: 1.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 1150.67ms. Allocated memory is still 117.4MB. Free memory was 77.4MB in the beginning and 84.6MB in the end (delta: -7.2MB). Peak memory consumption was 49.3MB. Max. memory is 16.1GB. * TraceAbstraction took 526784.26ms. Allocated memory was 117.4MB in the beginning and 2.1GB in the end (delta: 2.0GB). Free memory was 84.0MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/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_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bb07434636f33664cc09ed992a41516efeea5f96121c916fb8904844e76d9fcd --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:41:37,512 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:41:37,623 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-28 03:41:37,630 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:41:37,630 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:41:37,708 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:41:37,709 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:41:37,709 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:41:37,710 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:41:37,714 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:41:37,714 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:41:37,716 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:41:37,717 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:41:37,717 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:41:37,717 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:41:37,718 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:41:37,718 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:41:37,718 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:41:37,718 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:41:37,718 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:41:37,719 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 03:41:37,719 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 03:41:37,719 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 03:41:37,719 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:41:37,719 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 03:41:37,719 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-28 03:41:37,719 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-28 03:41:37,719 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 03:41:37,720 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:41:37,720 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:41:37,720 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:41:37,721 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:41:37,721 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:41:37,721 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:41:37,721 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:41:37,721 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:41:37,721 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:41:37,721 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:41:37,722 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:41:37,722 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:41:37,722 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:41:37,722 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:41:37,722 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:41:37,722 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-28 03:41:37,722 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-28 03:41:37,722 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:41:37,722 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:41:37,722 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:41:37,722 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:41:37,722 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_81090f67-0af9-4d54-80be-3839e79d0f01/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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> bb07434636f33664cc09ed992a41516efeea5f96121c916fb8904844e76d9fcd [2024-11-28 03:41:38,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:41:38,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:41:38,115 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:41:38,117 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:41:38,117 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:41:38,119 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/unroll-4.wvr.c [2024-11-28 03:41:41,399 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/data/4d8eb8332/45cc15693e824b998d7961ee86646775/FLAGad513337b [2024-11-28 03:41:41,755 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:41:41,759 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/sv-benchmarks/c/weaver/unroll-4.wvr.c [2024-11-28 03:41:41,778 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/data/4d8eb8332/45cc15693e824b998d7961ee86646775/FLAGad513337b [2024-11-28 03:41:41,801 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/data/4d8eb8332/45cc15693e824b998d7961ee86646775 [2024-11-28 03:41:41,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:41:41,806 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:41:41,808 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:41:41,808 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:41:41,814 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:41:41,815 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:41:41" (1/1) ... [2024-11-28 03:41:41,816 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c8bb1cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:41:41, skipping insertion in model container [2024-11-28 03:41:41,816 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:41:41" (1/1) ... [2024-11-28 03:41:41,837 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:41:42,095 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 03:41:42,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:41:42,115 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:41:42,171 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:41:42,196 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:41:42,196 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:41:42 WrapperNode [2024-11-28 03:41:42,198 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:41:42,199 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:41:42,200 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:41:42,200 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:41:42,211 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:41:42" (1/1) ... [2024-11-28 03:41:42,228 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:41:42" (1/1) ... [2024-11-28 03:41:42,277 INFO L138 Inliner]: procedures = 25, calls = 27, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 144 [2024-11-28 03:41:42,277 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:41:42,281 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:41:42,281 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:41:42,281 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:41:42,290 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:41:42" (1/1) ... [2024-11-28 03:41:42,291 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:41:42" (1/1) ... [2024-11-28 03:41:42,295 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:41:42" (1/1) ... [2024-11-28 03:41:42,327 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 1 writes are split as follows [0, 1]. [2024-11-28 03:41:42,329 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:41:42" (1/1) ... [2024-11-28 03:41:42,329 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:41:42" (1/1) ... [2024-11-28 03:41:42,344 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:41:42" (1/1) ... [2024-11-28 03:41:42,349 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:41:42" (1/1) ... [2024-11-28 03:41:42,353 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:41:42" (1/1) ... [2024-11-28 03:41:42,355 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:41:42" (1/1) ... [2024-11-28 03:41:42,357 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:41:42" (1/1) ... [2024-11-28 03:41:42,360 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:41:42,363 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:41:42,364 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:41:42,364 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:41:42,365 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:41:42" (1/1) ... [2024-11-28 03:41:42,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:41:42,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:41:42,409 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:41:42,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:41:42,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:41:42,449 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 03:41:42,449 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 03:41:42,449 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 03:41:42,450 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 03:41:42,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-28 03:41:42,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-28 03:41:42,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 03:41:42,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-28 03:41:42,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-28 03:41:42,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:41:42,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:41:42,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-28 03:41:42,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-28 03:41:42,453 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 03:41:42,586 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:41:42,588 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:41:43,215 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 03:41:43,216 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:41:43,634 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:41:43,635 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 03:41:43,636 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:41:43 BoogieIcfgContainer [2024-11-28 03:41:43,636 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:41:43,639 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:41:43,640 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:41:43,648 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:41:43,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:41:41" (1/3) ... [2024-11-28 03:41:43,649 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f1175f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:41:43, skipping insertion in model container [2024-11-28 03:41:43,650 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:41:42" (2/3) ... [2024-11-28 03:41:43,650 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f1175f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:41:43, skipping insertion in model container [2024-11-28 03:41:43,650 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:41:43" (3/3) ... [2024-11-28 03:41:43,652 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2024-11-28 03:41:43,670 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:41:43,672 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-4.wvr.c that has 3 procedures, 38 locations, 1 initial locations, 3 loop locations, and 14 error locations. [2024-11-28 03:41:43,672 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 03:41:43,761 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 03:41:43,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 40 transitions, 94 flow [2024-11-28 03:41:43,849 INFO L124 PetriNetUnfolderBase]: 3/38 cut-off events. [2024-11-28 03:41:43,852 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 03:41:43,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 38 events. 3/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-11-28 03:41:43,856 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 40 transitions, 94 flow [2024-11-28 03:41:43,860 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 37 transitions, 86 flow [2024-11-28 03:41:43,872 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:41:43,891 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=None, 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;@4e9ba1c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:41:43,894 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-11-28 03:41:43,902 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 03:41:43,902 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-28 03:41:43,903 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 03:41:43,903 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:41:43,904 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 03:41:43,905 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:41:43,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:41:43,914 INFO L85 PathProgramCache]: Analyzing trace with hash 511308, now seen corresponding path program 1 times [2024-11-28 03:41:43,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:41:43,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923234099] [2024-11-28 03:41:43,961 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:41:43,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:43,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:41:43,964 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:41:43,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:41:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:41:44,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:41:44,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:41:44,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 7 [2024-11-28 03:41:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:41:44,160 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:41:44,164 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:41:44,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923234099] [2024-11-28 03:41:44,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923234099] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:41:44,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:41:44,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 03:41:44,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743389227] [2024-11-28 03:41:44,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:41:44,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:41:44,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:41:44,204 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:41:44,205 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:41:44,246 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-28 03:41:44,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2024-11-28 03:41:44,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:41:44,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-28 03:41:44,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:41:44,425 INFO L124 PetriNetUnfolderBase]: 101/253 cut-off events. [2024-11-28 03:41:44,426 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-28 03:41:44,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 253 events. 101/253 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1137 event pairs, 75 based on Foata normal form. 1/191 useless extension candidates. Maximal degree in co-relation 390. Up to 175 conditions per place. [2024-11-28 03:41:44,430 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 20 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-11-28 03:41:44,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 124 flow [2024-11-28 03:41:44,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:41:44,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:41:44,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-11-28 03:41:44,445 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-11-28 03:41:44,447 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 86 flow. Second operand 3 states and 69 transitions. [2024-11-28 03:41:44,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 124 flow [2024-11-28 03:41:44,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 116 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 03:41:44,458 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 76 flow [2024-11-28 03:41:44,461 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2024-11-28 03:41:44,467 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -5 predicate places. [2024-11-28 03:41:44,467 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 76 flow [2024-11-28 03:41:44,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2024-11-28 03:41:44,468 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:41:44,468 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 03:41:44,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 03:41:44,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:44,669 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:41:44,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:41:44,670 INFO L85 PathProgramCache]: Analyzing trace with hash 511309, now seen corresponding path program 1 times [2024-11-28 03:41:44,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:41:44,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968075495] [2024-11-28 03:41:44,670 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:41:44,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:44,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:41:44,674 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:41:44,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:41:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:41:44,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:41:44,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:41:44,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2024-11-28 03:41:44,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:41:44,858 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:41:44,858 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:41:44,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968075495] [2024-11-28 03:41:44,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968075495] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:41:44,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:41:44,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 03:41:44,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163473622] [2024-11-28 03:41:44,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:41:44,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:41:44,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:41:44,863 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:41:44,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:41:44,928 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-28 03:41:44,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2024-11-28 03:41:44,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:41:44,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-28 03:41:44,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:41:45,115 INFO L124 PetriNetUnfolderBase]: 102/256 cut-off events. [2024-11-28 03:41:45,116 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-28 03:41:45,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 256 events. 102/256 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1144 event pairs, 75 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 426. Up to 180 conditions per place. [2024-11-28 03:41:45,118 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 23 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2024-11-28 03:41:45,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 37 transitions, 136 flow [2024-11-28 03:41:45,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:41:45,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:41:45,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-11-28 03:41:45,120 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-28 03:41:45,120 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 76 flow. Second operand 3 states and 72 transitions. [2024-11-28 03:41:45,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 37 transitions, 136 flow [2024-11-28 03:41:45,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 37 transitions, 130 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:41:45,123 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 91 flow [2024-11-28 03:41:45,123 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2024-11-28 03:41:45,124 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2024-11-28 03:41:45,124 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 91 flow [2024-11-28 03:41:45,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2024-11-28 03:41:45,125 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:41:45,125 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-28 03:41:45,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 03:41:45,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:45,325 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:41:45,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:41:45,326 INFO L85 PathProgramCache]: Analyzing trace with hash 491384343, now seen corresponding path program 1 times [2024-11-28 03:41:45,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:41:45,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192460496] [2024-11-28 03:41:45,326 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:41:45,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:45,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:41:45,328 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:41:45,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:41:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:41:45,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:41:45,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:41:45,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2024-11-28 03:41:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:41:45,634 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:41:45,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:41:45,921 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:41:45,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192460496] [2024-11-28 03:41:45,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192460496] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:41:45,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:41:45,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-11-28 03:41:45,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179718004] [2024-11-28 03:41:45,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:41:45,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:41:45,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:41:45,923 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:41:45,923 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:41:46,374 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-28 03:41:46,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 91 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 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) [2024-11-28 03:41:46,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:41:46,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-28 03:41:46,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:41:47,008 INFO L124 PetriNetUnfolderBase]: 104/264 cut-off events. [2024-11-28 03:41:47,009 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-28 03:41:47,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 264 events. 104/264 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1180 event pairs, 75 based on Foata normal form. 1/202 useless extension candidates. Maximal degree in co-relation 461. Up to 182 conditions per place. [2024-11-28 03:41:47,012 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 23 selfloop transitions, 11 changer transitions 0/45 dead transitions. [2024-11-28 03:41:47,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 186 flow [2024-11-28 03:41:47,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:41:47,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:41:47,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-11-28 03:41:47,015 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48055555555555557 [2024-11-28 03:41:47,015 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 91 flow. Second operand 9 states and 173 transitions. [2024-11-28 03:41:47,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 186 flow [2024-11-28 03:41:47,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:41:47,017 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 158 flow [2024-11-28 03:41:47,018 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=158, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-11-28 03:41:47,018 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2024-11-28 03:41:47,019 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 158 flow [2024-11-28 03:41:47,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 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) [2024-11-28 03:41:47,019 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:41:47,019 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:41:47,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 03:41:47,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:47,223 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:41:47,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:41:47,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1585284451, now seen corresponding path program 1 times [2024-11-28 03:41:47,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:41:47,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282962456] [2024-11-28 03:41:47,225 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:41:47,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:47,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:41:47,227 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:41:47,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:41:47,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:41:47,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 03:41:47,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:41:47,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2024-11-28 03:41:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:41:47,739 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:41:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:41:48,241 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:41:48,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282962456] [2024-11-28 03:41:48,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282962456] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:41:48,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:41:48,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-11-28 03:41:48,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316111770] [2024-11-28 03:41:48,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:41:48,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:41:48,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:41:48,243 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:41:48,244 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:41:49,037 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-28 03:41:49,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 158 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 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) [2024-11-28 03:41:49,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:41:49,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-28 03:41:49,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:41:49,941 INFO L124 PetriNetUnfolderBase]: 325/751 cut-off events. [2024-11-28 03:41:49,941 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-28 03:41:49,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1380 conditions, 751 events. 325/751 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4328 event pairs, 156 based on Foata normal form. 0/582 useless extension candidates. Maximal degree in co-relation 1250. Up to 248 conditions per place. [2024-11-28 03:41:49,950 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 59 selfloop transitions, 12 changer transitions 0/81 dead transitions. [2024-11-28 03:41:49,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 81 transitions, 380 flow [2024-11-28 03:41:49,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:41:49,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:41:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-11-28 03:41:49,955 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-11-28 03:41:49,955 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 158 flow. Second operand 8 states and 184 transitions. [2024-11-28 03:41:49,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 81 transitions, 380 flow [2024-11-28 03:41:49,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 81 transitions, 366 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-28 03:41:49,961 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 183 flow [2024-11-28 03:41:49,962 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=183, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-11-28 03:41:49,963 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-11-28 03:41:49,963 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 183 flow [2024-11-28 03:41:49,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 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) [2024-11-28 03:41:49,964 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:41:49,964 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:41:49,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 03:41:50,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:50,165 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:41:50,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:41:50,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1585284450, now seen corresponding path program 1 times [2024-11-28 03:41:50,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:41:50,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [951950335] [2024-11-28 03:41:50,166 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:41:50,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:50,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:41:50,168 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:41:50,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:41:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:41:50,238 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:41:50,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:41:50,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 7 [2024-11-28 03:41:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:41:50,283 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:41:50,283 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:41:50,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951950335] [2024-11-28 03:41:50,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951950335] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:41:50,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:41:50,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:41:50,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816333946] [2024-11-28 03:41:50,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:41:50,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:41:50,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:41:50,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:41:50,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:41:50,367 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-28 03:41:50,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 183 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2024-11-28 03:41:50,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:41:50,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-28 03:41:50,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:41:50,577 INFO L124 PetriNetUnfolderBase]: 302/646 cut-off events. [2024-11-28 03:41:50,577 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-11-28 03:41:50,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1332 conditions, 646 events. 302/646 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3302 event pairs, 225 based on Foata normal form. 48/619 useless extension candidates. Maximal degree in co-relation 1206. Up to 523 conditions per place. [2024-11-28 03:41:50,583 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 30 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2024-11-28 03:41:50,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 243 flow [2024-11-28 03:41:50,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:41:50,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:41:50,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-11-28 03:41:50,586 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-11-28 03:41:50,587 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 183 flow. Second operand 4 states and 67 transitions. [2024-11-28 03:41:50,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 243 flow [2024-11-28 03:41:50,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 42 transitions, 235 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 03:41:50,592 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 175 flow [2024-11-28 03:41:50,592 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=175, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-11-28 03:41:50,593 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-11-28 03:41:50,593 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 175 flow [2024-11-28 03:41:50,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2024-11-28 03:41:50,594 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:41:50,594 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:41:50,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 03:41:50,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:50,798 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:41:50,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:41:50,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1255253233, now seen corresponding path program 1 times [2024-11-28 03:41:50,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:41:50,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508108090] [2024-11-28 03:41:50,799 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:41:50,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:50,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:41:50,801 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:41:50,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:41:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:41:50,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 03:41:50,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:41:50,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2024-11-28 03:41:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:41:51,214 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:41:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:41:51,620 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:41:51,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508108090] [2024-11-28 03:41:51,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508108090] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:41:51,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:41:51,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-11-28 03:41:51,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424091576] [2024-11-28 03:41:51,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:41:51,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:41:51,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:41:51,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:41:51,622 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:41:52,171 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-28 03:41:52,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 175 flow. Second operand has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 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) [2024-11-28 03:41:52,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:41:52,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-28 03:41:52,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:41:53,016 INFO L124 PetriNetUnfolderBase]: 628/1119 cut-off events. [2024-11-28 03:41:53,017 INFO L125 PetriNetUnfolderBase]: For 146/146 co-relation queries the response was YES. [2024-11-28 03:41:53,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2477 conditions, 1119 events. 628/1119 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5302 event pairs, 221 based on Foata normal form. 0/848 useless extension candidates. Maximal degree in co-relation 2100. Up to 741 conditions per place. [2024-11-28 03:41:53,023 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 60 selfloop transitions, 12 changer transitions 0/74 dead transitions. [2024-11-28 03:41:53,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 401 flow [2024-11-28 03:41:53,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:41:53,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:41:53,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-11-28 03:41:53,025 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.490625 [2024-11-28 03:41:53,025 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 175 flow. Second operand 8 states and 157 transitions. [2024-11-28 03:41:53,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 401 flow [2024-11-28 03:41:53,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 74 transitions, 395 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:41:53,031 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 208 flow [2024-11-28 03:41:53,032 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=208, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-11-28 03:41:53,033 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-11-28 03:41:53,034 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 208 flow [2024-11-28 03:41:53,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 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) [2024-11-28 03:41:53,035 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:41:53,035 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:41:53,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 03:41:53,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:53,236 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:41:53,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:41:53,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1255016089, now seen corresponding path program 1 times [2024-11-28 03:41:53,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:41:53,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539299200] [2024-11-28 03:41:53,237 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:41:53,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:53,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:41:53,238 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:41:53,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:41:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:41:53,315 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 03:41:53,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:41:53,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2024-11-28 03:41:53,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:41:53,683 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:41:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:41:54,645 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:41:54,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539299200] [2024-11-28 03:41:54,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539299200] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:41:54,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:41:54,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-11-28 03:41:54,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879845544] [2024-11-28 03:41:54,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:41:54,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:41:54,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:41:54,647 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:41:54,647 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:41:57,256 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-28 03:41:57,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 208 flow. Second operand has 12 states, 12 states have (on average 15.666666666666666) internal successors, (188), 12 states have internal predecessors, (188), 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) [2024-11-28 03:41:57,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:41:57,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-28 03:41:57,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:41:59,478 INFO L124 PetriNetUnfolderBase]: 615/1225 cut-off events. [2024-11-28 03:41:59,478 INFO L125 PetriNetUnfolderBase]: For 201/201 co-relation queries the response was YES. [2024-11-28 03:41:59,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2743 conditions, 1225 events. 615/1225 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 6678 event pairs, 390 based on Foata normal form. 44/1090 useless extension candidates. Maximal degree in co-relation 2149. Up to 321 conditions per place. [2024-11-28 03:41:59,487 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 81 selfloop transitions, 16 changer transitions 0/102 dead transitions. [2024-11-28 03:41:59,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 102 transitions, 546 flow [2024-11-28 03:41:59,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:41:59,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:41:59,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-11-28 03:41:59,490 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-11-28 03:41:59,490 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 208 flow. Second operand 10 states and 232 transitions. [2024-11-28 03:41:59,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 102 transitions, 546 flow [2024-11-28 03:41:59,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 102 transitions, 533 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 03:41:59,495 INFO L231 Difference]: Finished difference. Result has 64 places, 48 transitions, 253 flow [2024-11-28 03:41:59,495 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=253, PETRI_PLACES=64, PETRI_TRANSITIONS=48} [2024-11-28 03:41:59,496 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-11-28 03:41:59,496 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 48 transitions, 253 flow [2024-11-28 03:41:59,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.666666666666666) internal successors, (188), 12 states have internal predecessors, (188), 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) [2024-11-28 03:41:59,496 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:41:59,496 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:41:59,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 03:41:59,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:59,697 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:41:59,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:41:59,697 INFO L85 PathProgramCache]: Analyzing trace with hash -258144028, now seen corresponding path program 1 times [2024-11-28 03:41:59,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:41:59,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664534943] [2024-11-28 03:41:59,698 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:41:59,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:59,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:41:59,701 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:41:59,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:41:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:41:59,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 03:41:59,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:41:59,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2024-11-28 03:42:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:42:00,102 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:42:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:42:01,155 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:42:01,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664534943] [2024-11-28 03:42:01,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664534943] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:42:01,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:42:01,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-11-28 03:42:01,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821889178] [2024-11-28 03:42:01,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:42:01,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:42:01,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:42:01,156 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:42:01,156 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:42:02,773 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-28 03:42:02,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 48 transitions, 253 flow. Second operand has 12 states, 12 states have (on average 12.833333333333334) internal successors, (154), 12 states have internal predecessors, (154), 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) [2024-11-28 03:42:02,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:42:02,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-28 03:42:02,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:42:05,182 INFO L124 PetriNetUnfolderBase]: 644/1143 cut-off events. [2024-11-28 03:42:05,182 INFO L125 PetriNetUnfolderBase]: For 628/628 co-relation queries the response was YES. [2024-11-28 03:42:05,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2965 conditions, 1143 events. 644/1143 cut-off events. For 628/628 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5200 event pairs, 323 based on Foata normal form. 32/1075 useless extension candidates. Maximal degree in co-relation 2277. Up to 265 conditions per place. [2024-11-28 03:42:05,191 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 78 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2024-11-28 03:42:05,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 94 transitions, 571 flow [2024-11-28 03:42:05,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:42:05,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:42:05,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-11-28 03:42:05,194 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5075 [2024-11-28 03:42:05,194 INFO L175 Difference]: Start difference. First operand has 64 places, 48 transitions, 253 flow. Second operand 10 states and 203 transitions. [2024-11-28 03:42:05,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 94 transitions, 571 flow [2024-11-28 03:42:05,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 94 transitions, 556 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-28 03:42:05,200 INFO L231 Difference]: Finished difference. Result has 71 places, 52 transitions, 298 flow [2024-11-28 03:42:05,200 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=298, PETRI_PLACES=71, PETRI_TRANSITIONS=52} [2024-11-28 03:42:05,201 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2024-11-28 03:42:05,201 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 52 transitions, 298 flow [2024-11-28 03:42:05,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.833333333333334) internal successors, (154), 12 states have internal predecessors, (154), 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) [2024-11-28 03:42:05,201 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:42:05,201 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-28 03:42:05,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 03:42:05,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:05,402 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:42:05,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:42:05,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1783852683, now seen corresponding path program 2 times [2024-11-28 03:42:05,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:42:05,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111831242] [2024-11-28 03:42:05,403 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:42:05,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:05,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:42:05,407 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:42:05,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:42:05,475 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:42:05,476 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:42:05,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:42:05,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:42:05,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2024-11-28 03:42:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:42:05,862 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:42:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:42:06,799 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:42:06,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111831242] [2024-11-28 03:42:06,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111831242] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:42:06,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:42:06,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-11-28 03:42:06,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872910805] [2024-11-28 03:42:06,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:42:06,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:42:06,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:42:06,800 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:42:06,800 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:42:08,021 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-28 03:42:08,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 52 transitions, 298 flow. Second operand has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 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) [2024-11-28 03:42:08,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:42:08,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-28 03:42:08,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:42:11,244 INFO L124 PetriNetUnfolderBase]: 598/1114 cut-off events. [2024-11-28 03:42:11,244 INFO L125 PetriNetUnfolderBase]: For 726/726 co-relation queries the response was YES. [2024-11-28 03:42:11,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3144 conditions, 1114 events. 598/1114 cut-off events. For 726/726 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5385 event pairs, 489 based on Foata normal form. 6/1120 useless extension candidates. Maximal degree in co-relation 2409. Up to 1042 conditions per place. [2024-11-28 03:42:11,249 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 35 selfloop transitions, 29 changer transitions 0/70 dead transitions. [2024-11-28 03:42:11,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 70 transitions, 600 flow [2024-11-28 03:42:11,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 03:42:11,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-28 03:42:11,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 373 transitions. [2024-11-28 03:42:11,252 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.444047619047619 [2024-11-28 03:42:11,252 INFO L175 Difference]: Start difference. First operand has 71 places, 52 transitions, 298 flow. Second operand 21 states and 373 transitions. [2024-11-28 03:42:11,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 70 transitions, 600 flow [2024-11-28 03:42:11,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 70 transitions, 575 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 03:42:11,261 INFO L231 Difference]: Finished difference. Result has 93 places, 70 transitions, 535 flow [2024-11-28 03:42:11,262 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=535, PETRI_PLACES=93, PETRI_TRANSITIONS=70} [2024-11-28 03:42:11,262 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 52 predicate places. [2024-11-28 03:42:11,262 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 70 transitions, 535 flow [2024-11-28 03:42:11,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 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) [2024-11-28 03:42:11,263 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:42:11,267 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2024-11-28 03:42:11,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 03:42:11,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:11,468 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:42:11,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:42:11,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1122058939, now seen corresponding path program 2 times [2024-11-28 03:42:11,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:42:11,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1838797127] [2024-11-28 03:42:11,469 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:42:11,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:11,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:42:11,471 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:42:11,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:42:11,533 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:42:11,533 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:42:11,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 03:42:11,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:42:11,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2024-11-28 03:42:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 03:42:11,951 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:42:11,951 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:42:11,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838797127] [2024-11-28 03:42:11,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838797127] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:42:11,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:42:11,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:42:11,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265376874] [2024-11-28 03:42:11,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:42:11,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:42:11,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:42:11,953 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:42:11,953 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:42:12,046 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-28 03:42:12,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 70 transitions, 535 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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) [2024-11-28 03:42:12,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:42:12,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-28 03:42:12,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:42:12,446 INFO L124 PetriNetUnfolderBase]: 697/1279 cut-off events. [2024-11-28 03:42:12,446 INFO L125 PetriNetUnfolderBase]: For 819/819 co-relation queries the response was YES. [2024-11-28 03:42:12,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3615 conditions, 1279 events. 697/1279 cut-off events. For 819/819 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6338 event pairs, 291 based on Foata normal form. 16/1295 useless extension candidates. Maximal degree in co-relation 3543. Up to 605 conditions per place. [2024-11-28 03:42:12,455 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 74 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2024-11-28 03:42:12,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 94 transitions, 796 flow [2024-11-28 03:42:12,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:42:12,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:42:12,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-11-28 03:42:12,456 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-28 03:42:12,456 INFO L175 Difference]: Start difference. First operand has 93 places, 70 transitions, 535 flow. Second operand 4 states and 100 transitions. [2024-11-28 03:42:12,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 94 transitions, 796 flow [2024-11-28 03:42:12,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 94 transitions, 708 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-11-28 03:42:12,466 INFO L231 Difference]: Finished difference. Result has 89 places, 71 transitions, 496 flow [2024-11-28 03:42:12,467 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=496, PETRI_PLACES=89, PETRI_TRANSITIONS=71} [2024-11-28 03:42:12,468 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-11-28 03:42:12,469 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 71 transitions, 496 flow [2024-11-28 03:42:12,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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) [2024-11-28 03:42:12,469 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:42:12,469 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:42:12,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 03:42:12,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:12,670 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:42:12,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:42:12,670 INFO L85 PathProgramCache]: Analyzing trace with hash -306635030, now seen corresponding path program 1 times [2024-11-28 03:42:12,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:42:12,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922589731] [2024-11-28 03:42:12,671 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:42:12,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:12,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:42:12,672 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:42:12,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:42:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:42:12,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:42:12,736 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:42:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:42:12,814 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:42:12,814 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:42:12,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922589731] [2024-11-28 03:42:12,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922589731] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:42:12,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:42:12,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:42:12,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125813717] [2024-11-28 03:42:12,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:42:12,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:42:12,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:42:12,815 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:42:12,815 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:42:12,862 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:42:12,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 71 transitions, 496 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:42:12,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:42:12,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:42:12,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:42:13,120 INFO L124 PetriNetUnfolderBase]: 713/1343 cut-off events. [2024-11-28 03:42:13,120 INFO L125 PetriNetUnfolderBase]: For 1086/1086 co-relation queries the response was YES. [2024-11-28 03:42:13,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3926 conditions, 1343 events. 713/1343 cut-off events. For 1086/1086 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6691 event pairs, 201 based on Foata normal form. 3/1346 useless extension candidates. Maximal degree in co-relation 3863. Up to 965 conditions per place. [2024-11-28 03:42:13,133 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 77 selfloop transitions, 7 changer transitions 1/92 dead transitions. [2024-11-28 03:42:13,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 92 transitions, 758 flow [2024-11-28 03:42:13,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:42:13,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:42:13,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-11-28 03:42:13,134 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-11-28 03:42:13,134 INFO L175 Difference]: Start difference. First operand has 89 places, 71 transitions, 496 flow. Second operand 3 states and 84 transitions. [2024-11-28 03:42:13,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 92 transitions, 758 flow [2024-11-28 03:42:13,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 92 transitions, 729 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-28 03:42:13,146 INFO L231 Difference]: Finished difference. Result has 88 places, 77 transitions, 545 flow [2024-11-28 03:42:13,146 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=545, PETRI_PLACES=88, PETRI_TRANSITIONS=77} [2024-11-28 03:42:13,147 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-11-28 03:42:13,147 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 77 transitions, 545 flow [2024-11-28 03:42:13,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:42:13,147 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:42:13,148 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:42:13,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 03:42:13,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:13,348 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:42:13,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:42:13,349 INFO L85 PathProgramCache]: Analyzing trace with hash -262069647, now seen corresponding path program 2 times [2024-11-28 03:42:13,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:42:13,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747862674] [2024-11-28 03:42:13,350 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:42:13,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:13,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:42:13,352 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:42:13,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:42:13,424 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:42:13,424 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:42:13,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 03:42:13,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:42:13,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2024-11-28 03:42:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 03:42:13,865 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:42:13,866 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:42:13,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747862674] [2024-11-28 03:42:13,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747862674] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:42:13,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:42:13,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:42:13,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280964809] [2024-11-28 03:42:13,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:42:13,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:42:13,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:42:13,869 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:42:13,869 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:42:14,021 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-28 03:42:14,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 77 transitions, 545 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2024-11-28 03:42:14,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:42:14,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-28 03:42:14,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:42:14,456 INFO L124 PetriNetUnfolderBase]: 835/1485 cut-off events. [2024-11-28 03:42:14,456 INFO L125 PetriNetUnfolderBase]: For 1463/1483 co-relation queries the response was YES. [2024-11-28 03:42:14,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4430 conditions, 1485 events. 835/1485 cut-off events. For 1463/1483 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6923 event pairs, 243 based on Foata normal form. 16/1501 useless extension candidates. Maximal degree in co-relation 4368. Up to 919 conditions per place. [2024-11-28 03:42:14,469 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 74 selfloop transitions, 17 changer transitions 0/94 dead transitions. [2024-11-28 03:42:14,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 94 transitions, 799 flow [2024-11-28 03:42:14,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:42:14,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:42:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-11-28 03:42:14,471 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-11-28 03:42:14,471 INFO L175 Difference]: Start difference. First operand has 88 places, 77 transitions, 545 flow. Second operand 4 states and 86 transitions. [2024-11-28 03:42:14,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 94 transitions, 799 flow [2024-11-28 03:42:14,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 94 transitions, 792 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:42:14,483 INFO L231 Difference]: Finished difference. Result has 91 places, 78 transitions, 598 flow [2024-11-28 03:42:14,483 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=598, PETRI_PLACES=91, PETRI_TRANSITIONS=78} [2024-11-28 03:42:14,484 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-11-28 03:42:14,484 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 78 transitions, 598 flow [2024-11-28 03:42:14,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2024-11-28 03:42:14,484 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:42:14,484 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1] [2024-11-28 03:42:14,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 03:42:14,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:14,698 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:42:14,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:42:14,699 INFO L85 PathProgramCache]: Analyzing trace with hash -261832503, now seen corresponding path program 2 times [2024-11-28 03:42:14,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:42:14,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530572978] [2024-11-28 03:42:14,699 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:42:14,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:14,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:42:14,701 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:42:14,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:42:14,779 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:42:14,779 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:42:14,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:42:14,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:42:14,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2024-11-28 03:42:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 03:42:15,024 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:42:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 03:42:15,987 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:42:15,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530572978] [2024-11-28 03:42:15,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530572978] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:42:15,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:42:15,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-11-28 03:42:15,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884923351] [2024-11-28 03:42:15,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:42:15,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:42:15,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:42:15,988 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:42:15,988 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:42:16,941 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-28 03:42:16,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 78 transitions, 598 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:42:16,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:42:16,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-28 03:42:16,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:42:17,580 INFO L124 PetriNetUnfolderBase]: 743/1369 cut-off events. [2024-11-28 03:42:17,580 INFO L125 PetriNetUnfolderBase]: For 1265/1265 co-relation queries the response was YES. [2024-11-28 03:42:17,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4149 conditions, 1369 events. 743/1369 cut-off events. For 1265/1265 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6696 event pairs, 405 based on Foata normal form. 22/1391 useless extension candidates. Maximal degree in co-relation 4084. Up to 964 conditions per place. [2024-11-28 03:42:17,592 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 68 selfloop transitions, 23 changer transitions 0/97 dead transitions. [2024-11-28 03:42:17,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 97 transitions, 881 flow [2024-11-28 03:42:17,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:42:17,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:42:17,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-11-28 03:42:17,594 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-11-28 03:42:17,594 INFO L175 Difference]: Start difference. First operand has 91 places, 78 transitions, 598 flow. Second operand 5 states and 108 transitions. [2024-11-28 03:42:17,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 97 transitions, 881 flow [2024-11-28 03:42:17,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 97 transitions, 834 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-28 03:42:17,606 INFO L231 Difference]: Finished difference. Result has 88 places, 77 transitions, 599 flow [2024-11-28 03:42:17,607 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=599, PETRI_PLACES=88, PETRI_TRANSITIONS=77} [2024-11-28 03:42:17,607 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-11-28 03:42:17,608 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 77 transitions, 599 flow [2024-11-28 03:42:17,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:42:17,608 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:42:17,608 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:42:17,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 03:42:17,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:17,809 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:42:17,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:42:17,810 INFO L85 PathProgramCache]: Analyzing trace with hash 465776066, now seen corresponding path program 2 times [2024-11-28 03:42:17,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:42:17,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925033017] [2024-11-28 03:42:17,810 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:42:17,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:17,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:42:17,813 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:42:17,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:42:17,909 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:42:17,909 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:42:17,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:42:17,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:42:17,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2024-11-28 03:42:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 03:42:18,178 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:42:18,179 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:42:18,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925033017] [2024-11-28 03:42:18,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925033017] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:42:18,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:42:18,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:42:18,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730273539] [2024-11-28 03:42:18,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:42:18,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:42:18,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:42:18,180 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:42:18,180 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:42:18,358 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-28 03:42:18,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 77 transitions, 599 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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) [2024-11-28 03:42:18,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:42:18,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-28 03:42:18,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:42:18,913 INFO L124 PetriNetUnfolderBase]: 743/1321 cut-off events. [2024-11-28 03:42:18,913 INFO L125 PetriNetUnfolderBase]: For 1839/1839 co-relation queries the response was YES. [2024-11-28 03:42:18,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4071 conditions, 1321 events. 743/1321 cut-off events. For 1839/1839 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6060 event pairs, 294 based on Foata normal form. 64/1385 useless extension candidates. Maximal degree in co-relation 4009. Up to 655 conditions per place. [2024-11-28 03:42:18,921 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 70 selfloop transitions, 17 changer transitions 0/89 dead transitions. [2024-11-28 03:42:18,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 89 transitions, 866 flow [2024-11-28 03:42:18,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:42:18,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:42:18,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-11-28 03:42:18,924 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-11-28 03:42:18,924 INFO L175 Difference]: Start difference. First operand has 88 places, 77 transitions, 599 flow. Second operand 5 states and 92 transitions. [2024-11-28 03:42:18,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 89 transitions, 866 flow [2024-11-28 03:42:18,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 89 transitions, 792 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 03:42:18,932 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 557 flow [2024-11-28 03:42:18,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=557, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2024-11-28 03:42:18,933 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 41 predicate places. [2024-11-28 03:42:18,933 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 557 flow [2024-11-28 03:42:18,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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) [2024-11-28 03:42:18,933 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:42:18,933 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:42:18,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 03:42:19,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:19,134 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:42:19,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:42:19,134 INFO L85 PathProgramCache]: Analyzing trace with hash -576727890, now seen corresponding path program 1 times [2024-11-28 03:42:19,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:42:19,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772425671] [2024-11-28 03:42:19,135 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:42:19,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:19,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:42:19,136 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:42:19,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 03:42:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:42:19,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:42:19,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:42:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:42:19,263 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:42:19,263 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:42:19,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772425671] [2024-11-28 03:42:19,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772425671] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:42:19,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:42:19,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:42:19,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121062917] [2024-11-28 03:42:19,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:42:19,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:42:19,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:42:19,264 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:42:19,264 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:42:19,264 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:42:19,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 557 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-11-28 03:42:19,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:42:19,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:42:19,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:42:19,554 INFO L124 PetriNetUnfolderBase]: 821/1453 cut-off events. [2024-11-28 03:42:19,554 INFO L125 PetriNetUnfolderBase]: For 1482/1482 co-relation queries the response was YES. [2024-11-28 03:42:19,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4396 conditions, 1453 events. 821/1453 cut-off events. For 1482/1482 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 6834 event pairs, 177 based on Foata normal form. 27/1480 useless extension candidates. Maximal degree in co-relation 4336. Up to 1128 conditions per place. [2024-11-28 03:42:19,562 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 93 selfloop transitions, 13 changer transitions 1/109 dead transitions. [2024-11-28 03:42:19,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 109 transitions, 953 flow [2024-11-28 03:42:19,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:42:19,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:42:19,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-11-28 03:42:19,563 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-11-28 03:42:19,563 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 557 flow. Second operand 4 states and 105 transitions. [2024-11-28 03:42:19,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 109 transitions, 953 flow [2024-11-28 03:42:19,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 109 transitions, 907 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 03:42:19,571 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 677 flow [2024-11-28 03:42:19,571 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=677, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2024-11-28 03:42:19,572 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-11-28 03:42:19,572 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 677 flow [2024-11-28 03:42:19,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-11-28 03:42:19,573 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:42:19,573 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:42:19,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 03:42:19,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:19,777 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:42:19,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:42:19,778 INFO L85 PathProgramCache]: Analyzing trace with hash 541705994, now seen corresponding path program 2 times [2024-11-28 03:42:19,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:42:19,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532861728] [2024-11-28 03:42:19,778 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:42:19,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:19,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:42:19,781 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:42:19,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 03:42:19,864 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:42:19,864 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:42:19,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:42:19,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:42:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:42:19,892 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:42:19,892 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:42:19,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532861728] [2024-11-28 03:42:19,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532861728] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:42:19,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:42:19,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:42:19,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875734065] [2024-11-28 03:42:19,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:42:19,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:42:19,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:42:19,893 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:42:19,893 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:42:19,893 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:42:19,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 677 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-11-28 03:42:19,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:42:19,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:42:19,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:42:20,201 INFO L124 PetriNetUnfolderBase]: 809/1441 cut-off events. [2024-11-28 03:42:20,201 INFO L125 PetriNetUnfolderBase]: For 2039/2039 co-relation queries the response was YES. [2024-11-28 03:42:20,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4747 conditions, 1441 events. 809/1441 cut-off events. For 2039/2039 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6968 event pairs, 390 based on Foata normal form. 12/1453 useless extension candidates. Maximal degree in co-relation 4687. Up to 979 conditions per place. [2024-11-28 03:42:20,210 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 100 selfloop transitions, 15 changer transitions 1/118 dead transitions. [2024-11-28 03:42:20,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 118 transitions, 1090 flow [2024-11-28 03:42:20,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:42:20,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:42:20,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-11-28 03:42:20,212 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-11-28 03:42:20,212 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 677 flow. Second operand 4 states and 103 transitions. [2024-11-28 03:42:20,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 118 transitions, 1090 flow [2024-11-28 03:42:20,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 118 transitions, 1090 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-28 03:42:20,221 INFO L231 Difference]: Finished difference. Result has 89 places, 87 transitions, 741 flow [2024-11-28 03:42:20,221 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=741, PETRI_PLACES=89, PETRI_TRANSITIONS=87} [2024-11-28 03:42:20,222 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-11-28 03:42:20,222 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 87 transitions, 741 flow [2024-11-28 03:42:20,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-11-28 03:42:20,222 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:42:20,222 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:42:20,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 03:42:20,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:20,423 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:42:20,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:42:20,423 INFO L85 PathProgramCache]: Analyzing trace with hash 535540754, now seen corresponding path program 3 times [2024-11-28 03:42:20,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:42:20,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383537315] [2024-11-28 03:42:20,424 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:42:20,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:20,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:42:20,425 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:42:20,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 03:42:20,494 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:42:20,494 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:42:20,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:42:20,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:42:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:42:20,536 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:42:20,536 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:42:20,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383537315] [2024-11-28 03:42:20,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383537315] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:42:20,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:42:20,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:42:20,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27794699] [2024-11-28 03:42:20,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:42:20,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:42:20,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:42:20,537 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:42:20,537 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:42:20,537 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:42:20,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 87 transitions, 741 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-11-28 03:42:20,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:42:20,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:42:20,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:42:20,832 INFO L124 PetriNetUnfolderBase]: 806/1423 cut-off events. [2024-11-28 03:42:20,832 INFO L125 PetriNetUnfolderBase]: For 3066/3066 co-relation queries the response was YES. [2024-11-28 03:42:20,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5145 conditions, 1423 events. 806/1423 cut-off events. For 3066/3066 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6694 event pairs, 390 based on Foata normal form. 27/1450 useless extension candidates. Maximal degree in co-relation 5082. Up to 979 conditions per place. [2024-11-28 03:42:20,839 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 93 selfloop transitions, 26 changer transitions 2/123 dead transitions. [2024-11-28 03:42:20,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 123 transitions, 1210 flow [2024-11-28 03:42:20,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:42:20,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:42:20,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-11-28 03:42:20,840 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-11-28 03:42:20,840 INFO L175 Difference]: Start difference. First operand has 89 places, 87 transitions, 741 flow. Second operand 4 states and 104 transitions. [2024-11-28 03:42:20,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 123 transitions, 1210 flow [2024-11-28 03:42:20,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 123 transitions, 1154 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-11-28 03:42:20,850 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 839 flow [2024-11-28 03:42:20,850 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=839, PETRI_PLACES=91, PETRI_TRANSITIONS=95} [2024-11-28 03:42:20,851 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-11-28 03:42:20,851 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 839 flow [2024-11-28 03:42:20,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-11-28 03:42:20,851 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:42:20,851 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] [2024-11-28 03:42:20,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 03:42:21,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:21,052 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:42:21,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:42:21,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1146250765, now seen corresponding path program 1 times [2024-11-28 03:42:21,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:42:21,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93345769] [2024-11-28 03:42:21,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:42:21,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:21,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:42:21,055 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:42:21,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 03:42:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:42:21,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:42:21,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:42:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:42:21,178 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:42:21,178 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:42:21,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93345769] [2024-11-28 03:42:21,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93345769] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:42:21,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:42:21,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:42:21,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723676648] [2024-11-28 03:42:21,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:42:21,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:42:21,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:42:21,179 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:42:21,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:42:21,179 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:42:21,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 839 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2024-11-28 03:42:21,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:42:21,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:42:21,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:42:21,522 INFO L124 PetriNetUnfolderBase]: 764/1357 cut-off events. [2024-11-28 03:42:21,522 INFO L125 PetriNetUnfolderBase]: For 3580/3580 co-relation queries the response was YES. [2024-11-28 03:42:21,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5091 conditions, 1357 events. 764/1357 cut-off events. For 3580/3580 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6639 event pairs, 244 based on Foata normal form. 18/1375 useless extension candidates. Maximal degree in co-relation 5028. Up to 850 conditions per place. [2024-11-28 03:42:21,529 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 127 selfloop transitions, 8 changer transitions 3/140 dead transitions. [2024-11-28 03:42:21,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 140 transitions, 1412 flow [2024-11-28 03:42:21,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:42:21,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:42:21,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-11-28 03:42:21,530 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-11-28 03:42:21,530 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 839 flow. Second operand 4 states and 112 transitions. [2024-11-28 03:42:21,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 140 transitions, 1412 flow [2024-11-28 03:42:21,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 140 transitions, 1350 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-11-28 03:42:21,537 INFO L231 Difference]: Finished difference. Result has 92 places, 96 transitions, 838 flow [2024-11-28 03:42:21,537 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=838, PETRI_PLACES=92, PETRI_TRANSITIONS=96} [2024-11-28 03:42:21,538 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2024-11-28 03:42:21,538 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 96 transitions, 838 flow [2024-11-28 03:42:21,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2024-11-28 03:42:21,538 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:42:21,538 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] [2024-11-28 03:42:21,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-28 03:42:21,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:21,739 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:42:21,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:42:21,739 INFO L85 PathProgramCache]: Analyzing trace with hash 626289079, now seen corresponding path program 2 times [2024-11-28 03:42:21,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:42:21,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789095362] [2024-11-28 03:42:21,740 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:42:21,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:21,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:42:21,742 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:42:21,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 03:42:21,824 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:42:21,824 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:42:21,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:42:21,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:42:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:42:21,865 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:42:21,866 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:42:21,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789095362] [2024-11-28 03:42:21,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789095362] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:42:21,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:42:21,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:42:21,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162087708] [2024-11-28 03:42:21,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:42:21,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:42:21,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:42:21,867 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:42:21,867 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:42:21,867 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:42:21,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 96 transitions, 838 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2024-11-28 03:42:21,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:42:21,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:42:21,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:42:22,163 INFO L124 PetriNetUnfolderBase]: 890/1567 cut-off events. [2024-11-28 03:42:22,163 INFO L125 PetriNetUnfolderBase]: For 4235/4235 co-relation queries the response was YES. [2024-11-28 03:42:22,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6398 conditions, 1567 events. 890/1567 cut-off events. For 4235/4235 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 7595 event pairs, 237 based on Foata normal form. 42/1609 useless extension candidates. Maximal degree in co-relation 6334. Up to 1215 conditions per place. [2024-11-28 03:42:22,170 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 105 selfloop transitions, 16 changer transitions 2/125 dead transitions. [2024-11-28 03:42:22,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 125 transitions, 1296 flow [2024-11-28 03:42:22,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:42:22,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:42:22,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-11-28 03:42:22,171 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-11-28 03:42:22,171 INFO L175 Difference]: Start difference. First operand has 92 places, 96 transitions, 838 flow. Second operand 4 states and 105 transitions. [2024-11-28 03:42:22,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 125 transitions, 1296 flow [2024-11-28 03:42:22,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 125 transitions, 1260 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:42:22,178 INFO L231 Difference]: Finished difference. Result has 95 places, 103 transitions, 952 flow [2024-11-28 03:42:22,178 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=952, PETRI_PLACES=95, PETRI_TRANSITIONS=103} [2024-11-28 03:42:22,179 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-11-28 03:42:22,179 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 103 transitions, 952 flow [2024-11-28 03:42:22,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2024-11-28 03:42:22,179 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:42:22,179 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] [2024-11-28 03:42:22,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-28 03:42:22,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:22,380 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:42:22,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:42:22,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1946202453, now seen corresponding path program 3 times [2024-11-28 03:42:22,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:42:22,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100389233] [2024-11-28 03:42:22,381 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:42:22,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:22,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:42:22,385 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:42:22,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 03:42:22,465 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-28 03:42:22,465 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:42:22,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:42:22,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:42:22,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:42:22,507 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:42:22,507 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:42:22,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100389233] [2024-11-28 03:42:22,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100389233] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:42:22,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:42:22,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:42:22,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993166281] [2024-11-28 03:42:22,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:42:22,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:42:22,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:42:22,509 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:42:22,509 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:42:22,509 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:42:22,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 103 transitions, 952 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2024-11-28 03:42:22,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:42:22,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:42:22,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:42:22,820 INFO L124 PetriNetUnfolderBase]: 869/1510 cut-off events. [2024-11-28 03:42:22,820 INFO L125 PetriNetUnfolderBase]: For 5010/5010 co-relation queries the response was YES. [2024-11-28 03:42:22,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6459 conditions, 1510 events. 869/1510 cut-off events. For 5010/5010 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 7208 event pairs, 264 based on Foata normal form. 42/1552 useless extension candidates. Maximal degree in co-relation 6394. Up to 892 conditions per place. [2024-11-28 03:42:22,829 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 117 selfloop transitions, 29 changer transitions 2/150 dead transitions. [2024-11-28 03:42:22,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 150 transitions, 1586 flow [2024-11-28 03:42:22,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:42:22,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:42:22,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-11-28 03:42:22,830 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-11-28 03:42:22,830 INFO L175 Difference]: Start difference. First operand has 95 places, 103 transitions, 952 flow. Second operand 4 states and 112 transitions. [2024-11-28 03:42:22,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 150 transitions, 1586 flow [2024-11-28 03:42:22,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 150 transitions, 1556 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-11-28 03:42:22,842 INFO L231 Difference]: Finished difference. Result has 98 places, 111 transitions, 1115 flow [2024-11-28 03:42:22,842 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1115, PETRI_PLACES=98, PETRI_TRANSITIONS=111} [2024-11-28 03:42:22,843 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-11-28 03:42:22,843 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 111 transitions, 1115 flow [2024-11-28 03:42:22,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2024-11-28 03:42:22,843 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:42:22,843 INFO L206 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-11-28 03:42:22,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 03:42:23,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:23,044 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:42:23,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:42:23,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1217053519, now seen corresponding path program 3 times [2024-11-28 03:42:23,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:42:23,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585141086] [2024-11-28 03:42:23,045 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:42:23,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:23,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:42:23,046 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:42:23,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 03:42:23,559 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-28 03:42:23,559 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:42:23,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 03:42:23,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:42:23,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2024-11-28 03:42:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:42:24,350 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:42:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:42:27,382 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:42:27,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585141086] [2024-11-28 03:42:27,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585141086] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:42:27,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:42:27,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-11-28 03:42:27,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252784365] [2024-11-28 03:42:27,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:42:27,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 03:42:27,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:42:27,383 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 03:42:27,384 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2024-11-28 03:42:32,193 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-28 03:42:32,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 111 transitions, 1115 flow. Second operand has 26 states, 26 states have (on average 16.76923076923077) internal successors, (436), 26 states have internal predecessors, (436), 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) [2024-11-28 03:42:32,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:42:32,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-28 03:42:32,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:42:55,094 INFO L124 PetriNetUnfolderBase]: 860/1501 cut-off events. [2024-11-28 03:42:55,094 INFO L125 PetriNetUnfolderBase]: For 6699/6699 co-relation queries the response was YES. [2024-11-28 03:42:55,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6968 conditions, 1501 events. 860/1501 cut-off events. For 6699/6699 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6780 event pairs, 504 based on Foata normal form. 12/1513 useless extension candidates. Maximal degree in co-relation 6697. Up to 1455 conditions per place. [2024-11-28 03:42:55,103 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 81 selfloop transitions, 65 changer transitions 0/147 dead transitions. [2024-11-28 03:42:55,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 147 transitions, 1755 flow [2024-11-28 03:42:55,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-28 03:42:55,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-11-28 03:42:55,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 775 transitions. [2024-11-28 03:42:55,108 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-11-28 03:42:55,108 INFO L175 Difference]: Start difference. First operand has 98 places, 111 transitions, 1115 flow. Second operand 45 states and 775 transitions. [2024-11-28 03:42:55,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 147 transitions, 1755 flow [2024-11-28 03:42:55,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 147 transitions, 1715 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-28 03:42:55,124 INFO L231 Difference]: Finished difference. Result has 150 places, 147 transitions, 1607 flow [2024-11-28 03:42:55,124 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1075, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1607, PETRI_PLACES=150, PETRI_TRANSITIONS=147} [2024-11-28 03:42:55,125 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-11-28 03:42:55,125 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 147 transitions, 1607 flow [2024-11-28 03:42:55,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 16.76923076923077) internal successors, (436), 26 states have internal predecessors, (436), 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) [2024-11-28 03:42:55,125 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:42:55,126 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] [2024-11-28 03:42:55,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 03:42:55,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:55,327 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:42:55,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:42:55,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1535330165, now seen corresponding path program 1 times [2024-11-28 03:42:55,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:42:55,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705510586] [2024-11-28 03:42:55,328 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:42:55,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:55,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:42:55,331 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:42:55,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 03:42:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:42:55,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:42:55,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:42:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:42:55,511 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:42:55,511 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:42:55,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705510586] [2024-11-28 03:42:55,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705510586] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:42:55,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:42:55,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:42:55,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958214663] [2024-11-28 03:42:55,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:42:55,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:42:55,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:42:55,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:42:55,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:42:55,514 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:42:55,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 147 transitions, 1607 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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) [2024-11-28 03:42:55,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:42:55,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:42:55,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:42:56,057 INFO L124 PetriNetUnfolderBase]: 1079/1870 cut-off events. [2024-11-28 03:42:56,057 INFO L125 PetriNetUnfolderBase]: For 6213/6213 co-relation queries the response was YES. [2024-11-28 03:42:56,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8468 conditions, 1870 events. 1079/1870 cut-off events. For 6213/6213 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 8931 event pairs, 275 based on Foata normal form. 72/1942 useless extension candidates. Maximal degree in co-relation 8368. Up to 892 conditions per place. [2024-11-28 03:42:56,071 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 182 selfloop transitions, 32 changer transitions 0/216 dead transitions. [2024-11-28 03:42:56,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 216 transitions, 2522 flow [2024-11-28 03:42:56,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:42:56,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:42:56,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-11-28 03:42:56,073 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.69 [2024-11-28 03:42:56,073 INFO L175 Difference]: Start difference. First operand has 150 places, 147 transitions, 1607 flow. Second operand 5 states and 138 transitions. [2024-11-28 03:42:56,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 216 transitions, 2522 flow [2024-11-28 03:42:56,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 216 transitions, 2338 flow, removed 63 selfloop flow, removed 20 redundant places. [2024-11-28 03:42:56,096 INFO L231 Difference]: Finished difference. Result has 135 places, 150 transitions, 1528 flow [2024-11-28 03:42:56,096 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1423, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1528, PETRI_PLACES=135, PETRI_TRANSITIONS=150} [2024-11-28 03:42:56,097 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2024-11-28 03:42:56,097 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 150 transitions, 1528 flow [2024-11-28 03:42:56,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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) [2024-11-28 03:42:56,097 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:42:56,097 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:42:56,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-28 03:42:56,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:56,298 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:42:56,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:42:56,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1842165169, now seen corresponding path program 2 times [2024-11-28 03:42:56,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:42:56,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632505580] [2024-11-28 03:42:56,299 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:42:56,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:56,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:42:56,301 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:42:56,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 03:42:56,398 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:42:56,399 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:42:56,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:42:56,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:42:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:42:56,497 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:42:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:42:56,676 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:42:56,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632505580] [2024-11-28 03:42:56,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632505580] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:42:56,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:42:56,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-28 03:42:56,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316394269] [2024-11-28 03:42:56,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:42:56,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:42:56,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:42:56,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:42:56,677 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:42:56,677 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:42:56,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 150 transitions, 1528 flow. Second operand has 10 states, 10 states have (on average 19.5) internal successors, (195), 10 states have internal predecessors, (195), 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) [2024-11-28 03:42:56,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:42:56,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:42:56,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:42:57,788 INFO L124 PetriNetUnfolderBase]: 1421/2446 cut-off events. [2024-11-28 03:42:57,788 INFO L125 PetriNetUnfolderBase]: For 9401/9401 co-relation queries the response was YES. [2024-11-28 03:42:57,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11584 conditions, 2446 events. 1421/2446 cut-off events. For 9401/9401 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 12219 event pairs, 191 based on Foata normal form. 156/2602 useless extension candidates. Maximal degree in co-relation 11494. Up to 703 conditions per place. [2024-11-28 03:42:57,803 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 231 selfloop transitions, 44 changer transitions 0/277 dead transitions. [2024-11-28 03:42:57,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 277 transitions, 3031 flow [2024-11-28 03:42:57,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:42:57,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:42:57,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-11-28 03:42:57,805 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6928571428571428 [2024-11-28 03:42:57,805 INFO L175 Difference]: Start difference. First operand has 135 places, 150 transitions, 1528 flow. Second operand 7 states and 194 transitions. [2024-11-28 03:42:57,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 277 transitions, 3031 flow [2024-11-28 03:42:57,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 277 transitions, 2976 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-28 03:42:57,826 INFO L231 Difference]: Finished difference. Result has 141 places, 159 transitions, 1687 flow [2024-11-28 03:42:57,826 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1687, PETRI_PLACES=141, PETRI_TRANSITIONS=159} [2024-11-28 03:42:57,826 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-11-28 03:42:57,827 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 159 transitions, 1687 flow [2024-11-28 03:42:57,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.5) internal successors, (195), 10 states have internal predecessors, (195), 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) [2024-11-28 03:42:57,827 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:42:57,827 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:42:57,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-28 03:42:58,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:58,027 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:42:58,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:42:58,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1383411061, now seen corresponding path program 3 times [2024-11-28 03:42:58,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:42:58,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99225360] [2024-11-28 03:42:58,028 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:42:58,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:42:58,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:42:58,030 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:42:58,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 03:42:58,139 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:42:58,139 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:42:58,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 03:42:58,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:42:58,200 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 15 treesize of output 1 [2024-11-28 03:42:58,639 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:42:58,650 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:42:58,650 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 19 treesize of output 10 [2024-11-28 03:42:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:42:58,693 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:43:00,187 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 33 treesize of output 29 [2024-11-28 03:43:00,218 INFO L349 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2024-11-28 03:43:00,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 69 [2024-11-28 03:43:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:43:00,487 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:43:00,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99225360] [2024-11-28 03:43:00,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99225360] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:43:00,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:43:00,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-28 03:43:00,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102007957] [2024-11-28 03:43:00,488 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:43:00,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:43:00,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:43:00,488 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:43:00,489 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:43:02,988 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-28 03:43:02,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 159 transitions, 1687 flow. Second operand has 15 states, 15 states have (on average 18.866666666666667) internal successors, (283), 15 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:02,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:43:02,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-28 03:43:02,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:43:05,758 INFO L124 PetriNetUnfolderBase]: 1709/2940 cut-off events. [2024-11-28 03:43:05,758 INFO L125 PetriNetUnfolderBase]: For 15351/15351 co-relation queries the response was YES. [2024-11-28 03:43:05,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14727 conditions, 2940 events. 1709/2940 cut-off events. For 15351/15351 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 14312 event pairs, 279 based on Foata normal form. 3/2943 useless extension candidates. Maximal degree in co-relation 14635. Up to 1457 conditions per place. [2024-11-28 03:43:05,772 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 116 selfloop transitions, 79 changer transitions 63/260 dead transitions. [2024-11-28 03:43:05,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 260 transitions, 2978 flow [2024-11-28 03:43:05,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:43:05,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 03:43:05,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 277 transitions. [2024-11-28 03:43:05,774 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6295454545454545 [2024-11-28 03:43:05,774 INFO L175 Difference]: Start difference. First operand has 141 places, 159 transitions, 1687 flow. Second operand 11 states and 277 transitions. [2024-11-28 03:43:05,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 260 transitions, 2978 flow [2024-11-28 03:43:05,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 260 transitions, 2767 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-11-28 03:43:05,802 INFO L231 Difference]: Finished difference. Result has 149 places, 160 transitions, 1699 flow [2024-11-28 03:43:05,803 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1699, PETRI_PLACES=149, PETRI_TRANSITIONS=160} [2024-11-28 03:43:05,803 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-11-28 03:43:05,803 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 160 transitions, 1699 flow [2024-11-28 03:43:05,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 18.866666666666667) internal successors, (283), 15 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:05,804 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:43:05,804 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:05,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-28 03:43:06,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:06,004 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-28 03:43:06,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:06,005 INFO L85 PathProgramCache]: Analyzing trace with hash 34927269, now seen corresponding path program 4 times [2024-11-28 03:43:06,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:43:06,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367706214] [2024-11-28 03:43:06,005 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:43:06,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:06,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:06,007 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:06,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81090f67-0af9-4d54-80be-3839e79d0f01/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 03:43:06,167 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:43:06,167 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:43:06,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 03:43:06,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:06,367 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 15 treesize of output 1 [2024-11-28 03:43:07,837 INFO L349 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2024-11-28 03:43:07,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 45 [2024-11-28 03:43:07,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:43:07,951 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:43:36,038 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 532 treesize of output 468 [2024-11-28 03:43:42,072 WARN L286 SmtUtils]: Spent 5.98s on a formula simplification. DAG size of input: 251 DAG size of output: 248 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-28 03:43:42,074 INFO L349 Elim1Store]: treesize reduction 5, result has 99.1 percent of original size [2024-11-28 03:43:42,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 19 new quantified variables, introduced 55 case distinctions, treesize of input 6599 treesize of output 3996