./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC --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 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 22:38:52,504 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 22:38:52,631 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-23 22:38:52,642 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 22:38:52,642 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 22:38:52,671 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 22:38:52,672 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 22:38:52,672 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 22:38:52,673 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 22:38:52,673 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 22:38:52,673 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 22:38:52,673 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 22:38:52,674 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 22:38:52,674 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 22:38:52,674 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 22:38:52,674 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 22:38:52,674 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 22:38:52,674 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 22:38:52,675 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 22:38:52,675 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 22:38:52,675 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-23 22:38:52,675 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-23 22:38:52,675 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-23 22:38:52,675 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 22:38:52,675 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 22:38:52,676 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 22:38:52,676 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 22:38:52,676 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 22:38:52,676 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 22:38:52,676 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 22:38:52,676 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 22:38:52,676 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 22:38:52,676 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 22:38:52,677 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 22:38:52,677 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 22:38:52,677 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 22:38:52,677 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 22:38:52,677 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 22:38:52,677 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 22:38:52,678 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 22:38:52,678 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 22:38:52,678 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 22:38:52,678 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 22:38:52,678 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 22:38:52,678 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 22:38:52,678 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 22:38:52,678 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 22:38:52,678 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_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC 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 -> 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 [2024-11-23 22:38:53,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 22:38:53,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 22:38:53,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 22:38:53,105 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 22:38:53,106 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 22:38:53,107 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2024-11-23 22:38:56,728 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/data/9175f3f03/5b3d11f52f36472eb12982378e52c3ac/FLAGbbfd5fe23 [2024-11-23 22:38:57,017 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 22:38:57,018 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2024-11-23 22:38:57,028 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/data/9175f3f03/5b3d11f52f36472eb12982378e52c3ac/FLAGbbfd5fe23 [2024-11-23 22:38:57,044 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/data/9175f3f03/5b3d11f52f36472eb12982378e52c3ac [2024-11-23 22:38:57,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 22:38:57,049 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 22:38:57,050 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 22:38:57,051 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 22:38:57,057 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 22:38:57,059 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:38:57" (1/1) ... [2024-11-23 22:38:57,060 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bca4751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:57, skipping insertion in model container [2024-11-23 22:38:57,060 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:38:57" (1/1) ... [2024-11-23 22:38:57,081 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 22:38:57,381 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 22:38:57,386 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 22:38:57,405 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 22:38:57,458 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 22:38:57,482 INFO L204 MainTranslator]: Completed translation [2024-11-23 22:38:57,482 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:57 WrapperNode [2024-11-23 22:38:57,483 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 22:38:57,484 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 22:38:57,486 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 22:38:57,486 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 22:38:57,496 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:57" (1/1) ... [2024-11-23 22:38:57,505 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:57" (1/1) ... [2024-11-23 22:38:57,541 INFO L138 Inliner]: procedures = 24, calls = 38, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 147 [2024-11-23 22:38:57,546 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 22:38:57,547 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 22:38:57,547 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 22:38:57,547 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 22:38:57,559 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:57" (1/1) ... [2024-11-23 22:38:57,561 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:57" (1/1) ... [2024-11-23 22:38:57,569 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:57" (1/1) ... [2024-11-23 22:38:57,602 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-23 22:38:57,602 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:57" (1/1) ... [2024-11-23 22:38:57,603 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:57" (1/1) ... [2024-11-23 22:38:57,611 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:57" (1/1) ... [2024-11-23 22:38:57,612 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:57" (1/1) ... [2024-11-23 22:38:57,621 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:57" (1/1) ... [2024-11-23 22:38:57,626 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:57" (1/1) ... [2024-11-23 22:38:57,627 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:57" (1/1) ... [2024-11-23 22:38:57,634 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 22:38:57,635 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 22:38:57,636 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 22:38:57,636 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 22:38:57,637 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:57" (1/1) ... [2024-11-23 22:38:57,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 22:38:57,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:38:57,686 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 22:38:57,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 22:38:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 22:38:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 22:38:57,730 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 22:38:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 22:38:57,731 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 22:38:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-23 22:38:57,731 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-23 22:38:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 22:38:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 22:38:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 22:38:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 22:38:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-23 22:38:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-23 22:38:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 22:38:57,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 22:38:57,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 22:38:57,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 22:38:57,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 22:38:57,734 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 22:38:57,874 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 22:38:57,876 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 22:38:58,324 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 22:38:58,324 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 22:38:58,660 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 22:38:58,661 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-23 22:38:58,661 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:38:58 BoogieIcfgContainer [2024-11-23 22:38:58,661 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 22:38:58,664 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 22:38:58,664 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 22:38:58,674 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 22:38:58,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:38:57" (1/3) ... [2024-11-23 22:38:58,675 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1168523e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:38:58, skipping insertion in model container [2024-11-23 22:38:58,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:57" (2/3) ... [2024-11-23 22:38:58,676 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1168523e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:38:58, skipping insertion in model container [2024-11-23 22:38:58,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:38:58" (3/3) ... [2024-11-23 22:38:58,677 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2024-11-23 22:38:58,697 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 22:38:58,699 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-send-receive.wvr.c that has 4 procedures, 45 locations, 1 initial locations, 3 loop locations, and 10 error locations. [2024-11-23 22:38:58,699 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 22:38:58,778 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-23 22:38:58,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 48 transitions, 117 flow [2024-11-23 22:38:58,891 INFO L124 PetriNetUnfolderBase]: 4/45 cut-off events. [2024-11-23 22:38:58,897 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-23 22:38:58,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 45 events. 4/45 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 100 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-11-23 22:38:58,905 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 48 transitions, 117 flow [2024-11-23 22:38:58,911 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 44 transitions, 106 flow [2024-11-23 22:38:58,922 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 22:38:58,939 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;@135be3af, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 22:38:58,939 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-23 22:38:58,945 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 22:38:58,945 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-23 22:38:58,945 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 22:38:58,945 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:38:58,946 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 22:38:58,947 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-23 22:38:58,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:38:58,954 INFO L85 PathProgramCache]: Analyzing trace with hash 456575, now seen corresponding path program 1 times [2024-11-23 22:38:58,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:38:58,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617450449] [2024-11-23 22:38:58,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:38:58,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:38:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:38:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:38:59,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:38:59,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617450449] [2024-11-23 22:38:59,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617450449] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:38:59,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:38:59,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 22:38:59,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729997545] [2024-11-23 22:38:59,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:38:59,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 22:38:59,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:38:59,394 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 22:38:59,395 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 22:38:59,415 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-23 22:38:59,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2024-11-23 22:38:59,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:38:59,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-23 22:38:59,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:38:59,890 INFO L124 PetriNetUnfolderBase]: 535/975 cut-off events. [2024-11-23 22:38:59,890 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-11-23 22:38:59,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1931 conditions, 975 events. 535/975 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 6778 event pairs, 491 based on Foata normal form. 1/627 useless extension candidates. Maximal degree in co-relation 1792. Up to 826 conditions per place. [2024-11-23 22:38:59,916 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 25 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-11-23 22:38:59,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 41 transitions, 154 flow [2024-11-23 22:38:59,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 22:38:59,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 22:38:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-11-23 22:38:59,945 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2024-11-23 22:38:59,948 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 106 flow. Second operand 3 states and 83 transitions. [2024-11-23 22:38:59,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 41 transitions, 154 flow [2024-11-23 22:38:59,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 41 transitions, 142 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-23 22:38:59,964 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 92 flow [2024-11-23 22:38:59,969 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2024-11-23 22:38:59,976 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2024-11-23 22:38:59,978 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 92 flow [2024-11-23 22:38:59,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2024-11-23 22:38:59,978 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:38:59,979 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 22:38:59,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 22:38:59,979 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-23 22:38:59,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:38:59,981 INFO L85 PathProgramCache]: Analyzing trace with hash 456576, now seen corresponding path program 1 times [2024-11-23 22:38:59,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:38:59,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012755983] [2024-11-23 22:38:59,983 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:38:59,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:39:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:39:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:39:00,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:00,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012755983] [2024-11-23 22:39:00,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012755983] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:39:00,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:39:00,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 22:39:00,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121725445] [2024-11-23 22:39:00,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:39:00,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 22:39:00,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:39:00,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 22:39:00,541 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 22:39:00,562 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-23 22:39:00,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2024-11-23 22:39:00,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:39:00,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-23 22:39:00,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:39:00,946 INFO L124 PetriNetUnfolderBase]: 536/978 cut-off events. [2024-11-23 22:39:00,946 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 22:39:00,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1867 conditions, 978 events. 536/978 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 6752 event pairs, 491 based on Foata normal form. 0/629 useless extension candidates. Maximal degree in co-relation 1845. Up to 831 conditions per place. [2024-11-23 22:39:00,964 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 27 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-11-23 22:39:00,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 162 flow [2024-11-23 22:39:00,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 22:39:00,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 22:39:00,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-11-23 22:39:00,968 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-23 22:39:00,968 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 92 flow. Second operand 4 states and 104 transitions. [2024-11-23 22:39:00,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 162 flow [2024-11-23 22:39:00,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 22:39:00,974 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 115 flow [2024-11-23 22:39:00,974 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2024-11-23 22:39:00,975 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2024-11-23 22:39:00,976 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 115 flow [2024-11-23 22:39:00,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2024-11-23 22:39:00,976 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:39:00,977 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-23 22:39:00,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 22:39:00,977 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-23 22:39:00,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:39:00,978 INFO L85 PathProgramCache]: Analyzing trace with hash 438783091, now seen corresponding path program 1 times [2024-11-23 22:39:00,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:39:00,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553328532] [2024-11-23 22:39:00,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:39:00,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:39:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:39:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:39:01,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:01,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553328532] [2024-11-23 22:39:01,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553328532] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:39:01,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676629821] [2024-11-23 22:39:01,531 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:39:01,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:39:01,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:39:01,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:39:01,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 22:39:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:39:01,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 22:39:01,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:39:01,738 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 10 treesize of output 9 [2024-11-23 22:39:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:39:02,117 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:39:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:39:02,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676629821] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:39:02,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:39:02,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-23 22:39:02,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596978293] [2024-11-23 22:39:02,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:39:02,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 22:39:02,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:39:02,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 22:39:02,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-23 22:39:02,402 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-23 22:39:02,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 115 flow. Second operand has 11 states, 11 states have (on average 19.363636363636363) internal successors, (213), 11 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:39:02,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:39:02,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-23 22:39:02,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:39:03,051 INFO L124 PetriNetUnfolderBase]: 536/977 cut-off events. [2024-11-23 22:39:03,051 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 22:39:03,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1874 conditions, 977 events. 536/977 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 6754 event pairs, 491 based on Foata normal form. 0/628 useless extension candidates. Maximal degree in co-relation 1852. Up to 827 conditions per place. [2024-11-23 22:39:03,061 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 23 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2024-11-23 22:39:03,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 43 transitions, 171 flow [2024-11-23 22:39:03,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 22:39:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 22:39:03,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-11-23 22:39:03,065 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4826388888888889 [2024-11-23 22:39:03,065 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 115 flow. Second operand 6 states and 139 transitions. [2024-11-23 22:39:03,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 43 transitions, 171 flow [2024-11-23 22:39:03,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 43 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 22:39:03,069 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 122 flow [2024-11-23 22:39:03,069 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=122, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2024-11-23 22:39:03,070 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2024-11-23 22:39:03,070 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 122 flow [2024-11-23 22:39:03,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.363636363636363) internal successors, (213), 11 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:39:03,071 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:39:03,071 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:39:03,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-23 22:39:03,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:39:03,272 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-23 22:39:03,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:39:03,272 INFO L85 PathProgramCache]: Analyzing trace with hash 837017746, now seen corresponding path program 1 times [2024-11-23 22:39:03,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:39:03,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40859609] [2024-11-23 22:39:03,273 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:39:03,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:39:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:39:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:39:03,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:03,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40859609] [2024-11-23 22:39:03,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40859609] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:39:03,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:39:03,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 22:39:03,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119428745] [2024-11-23 22:39:03,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:39:03,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 22:39:03,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:39:03,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 22:39:03,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 22:39:03,332 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-23 22:39:03,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:39:03,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:39:03,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-23 22:39:03,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:39:03,609 INFO L124 PetriNetUnfolderBase]: 788/1330 cut-off events. [2024-11-23 22:39:03,610 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-23 22:39:03,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2543 conditions, 1330 events. 788/1330 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7090 event pairs, 266 based on Foata normal form. 46/935 useless extension candidates. Maximal degree in co-relation 2517. Up to 856 conditions per place. [2024-11-23 22:39:03,619 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 43 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2024-11-23 22:39:03,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 59 transitions, 250 flow [2024-11-23 22:39:03,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 22:39:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 22:39:03,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-11-23 22:39:03,621 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7152777777777778 [2024-11-23 22:39:03,621 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 122 flow. Second operand 3 states and 103 transitions. [2024-11-23 22:39:03,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 59 transitions, 250 flow [2024-11-23 22:39:03,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 59 transitions, 220 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-23 22:39:03,624 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 115 flow [2024-11-23 22:39:03,624 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2024-11-23 22:39:03,624 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -5 predicate places. [2024-11-23 22:39:03,627 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 115 flow [2024-11-23 22:39:03,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:39:03,627 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:39:03,627 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:39:03,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-23 22:39:03,627 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-23 22:39:03,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:39:03,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1377938232, now seen corresponding path program 1 times [2024-11-23 22:39:03,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:39:03,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81117588] [2024-11-23 22:39:03,629 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:39:03,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:39:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:39:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:39:03,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:03,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81117588] [2024-11-23 22:39:03,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81117588] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:39:03,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:39:03,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 22:39:03,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984857822] [2024-11-23 22:39:03,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:39:03,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 22:39:03,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:39:03,783 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 22:39:03,783 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 22:39:03,804 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-23 22:39:03,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:39:03,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:39:03,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-23 22:39:03,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:39:04,010 INFO L124 PetriNetUnfolderBase]: 488/856 cut-off events. [2024-11-23 22:39:04,010 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-11-23 22:39:04,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1841 conditions, 856 events. 488/856 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4388 event pairs, 330 based on Foata normal form. 0/700 useless extension candidates. Maximal degree in co-relation 842. Up to 712 conditions per place. [2024-11-23 22:39:04,020 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 26 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2024-11-23 22:39:04,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 42 transitions, 165 flow [2024-11-23 22:39:04,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 22:39:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 22:39:04,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-11-23 22:39:04,026 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-11-23 22:39:04,026 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 115 flow. Second operand 4 states and 99 transitions. [2024-11-23 22:39:04,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 42 transitions, 165 flow [2024-11-23 22:39:04,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 42 transitions, 162 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 22:39:04,028 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 110 flow [2024-11-23 22:39:04,028 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=110, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2024-11-23 22:39:04,033 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2024-11-23 22:39:04,033 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 110 flow [2024-11-23 22:39:04,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:39:04,033 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:39:04,034 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:39:04,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-23 22:39:04,034 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-23 22:39:04,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:39:04,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1377938231, now seen corresponding path program 1 times [2024-11-23 22:39:04,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:39:04,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018557947] [2024-11-23 22:39:04,035 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:39:04,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:39:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:39:04,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:39:04,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:04,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018557947] [2024-11-23 22:39:04,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018557947] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:39:04,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:39:04,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 22:39:04,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071732420] [2024-11-23 22:39:04,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:39:04,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 22:39:04,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:39:04,198 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 22:39:04,198 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 22:39:04,205 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-23 22:39:04,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 110 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) [2024-11-23 22:39:04,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:39:04,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-23 22:39:04,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:39:04,455 INFO L124 PetriNetUnfolderBase]: 540/979 cut-off events. [2024-11-23 22:39:04,455 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-11-23 22:39:04,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2050 conditions, 979 events. 540/979 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5295 event pairs, 383 based on Foata normal form. 0/818 useless extension candidates. Maximal degree in co-relation 1794. Up to 715 conditions per place. [2024-11-23 22:39:04,463 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 39 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2024-11-23 22:39:04,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 226 flow [2024-11-23 22:39:04,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 22:39:04,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 22:39:04,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-11-23 22:39:04,466 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-11-23 22:39:04,466 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 110 flow. Second operand 4 states and 117 transitions. [2024-11-23 22:39:04,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 226 flow [2024-11-23 22:39:04,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 22:39:04,468 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 115 flow [2024-11-23 22:39:04,468 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2024-11-23 22:39:04,472 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2024-11-23 22:39:04,472 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 115 flow [2024-11-23 22:39:04,472 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) [2024-11-23 22:39:04,472 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:39:04,472 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:39:04,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-23 22:39:04,473 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-23 22:39:04,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:39:04,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1832196214, now seen corresponding path program 1 times [2024-11-23 22:39:04,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:39:04,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146402067] [2024-11-23 22:39:04,474 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:39:04,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:39:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:39:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 22:39:04,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:04,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146402067] [2024-11-23 22:39:04,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146402067] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:39:04,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:39:04,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 22:39:04,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661683895] [2024-11-23 22:39:04,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:39:04,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 22:39:04,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:39:04,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 22:39:04,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 22:39:04,578 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-11-23 22:39:04,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2024-11-23 22:39:04,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:39:04,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-11-23 22:39:04,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:39:04,842 INFO L124 PetriNetUnfolderBase]: 694/1162 cut-off events. [2024-11-23 22:39:04,842 INFO L125 PetriNetUnfolderBase]: For 185/185 co-relation queries the response was YES. [2024-11-23 22:39:04,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2562 conditions, 1162 events. 694/1162 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6192 event pairs, 219 based on Foata normal form. 14/1011 useless extension candidates. Maximal degree in co-relation 2313. Up to 743 conditions per place. [2024-11-23 22:39:04,852 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 42 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2024-11-23 22:39:04,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 237 flow [2024-11-23 22:39:04,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 22:39:04,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 22:39:04,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-11-23 22:39:04,854 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-11-23 22:39:04,854 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 115 flow. Second operand 3 states and 93 transitions. [2024-11-23 22:39:04,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 237 flow [2024-11-23 22:39:04,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 55 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 22:39:04,858 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 118 flow [2024-11-23 22:39:04,858 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-11-23 22:39:04,861 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2024-11-23 22:39:04,861 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 118 flow [2024-11-23 22:39:04,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2024-11-23 22:39:04,862 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:39:04,862 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:39:04,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-23 22:39:04,862 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-23 22:39:04,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:39:04,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1832196180, now seen corresponding path program 1 times [2024-11-23 22:39:04,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:39:04,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164506061] [2024-11-23 22:39:04,863 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:39:04,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:39:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:39:05,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 22:39:05,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:05,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164506061] [2024-11-23 22:39:05,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164506061] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:39:05,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:39:05,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 22:39:05,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879880241] [2024-11-23 22:39:05,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:39:05,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 22:39:05,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:39:05,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 22:39:05,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-23 22:39:05,392 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-23 22:39:05,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 118 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 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) [2024-11-23 22:39:05,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:39:05,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-23 22:39:05,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:39:05,673 INFO L124 PetriNetUnfolderBase]: 327/682 cut-off events. [2024-11-23 22:39:05,673 INFO L125 PetriNetUnfolderBase]: For 212/212 co-relation queries the response was YES. [2024-11-23 22:39:05,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1444 conditions, 682 events. 327/682 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3669 event pairs, 200 based on Foata normal form. 54/699 useless extension candidates. Maximal degree in co-relation 1172. Up to 419 conditions per place. [2024-11-23 22:39:05,679 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 25 selfloop transitions, 7 changer transitions 0/46 dead transitions. [2024-11-23 22:39:05,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 192 flow [2024-11-23 22:39:05,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 22:39:05,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 22:39:05,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-11-23 22:39:05,681 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-11-23 22:39:05,681 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 118 flow. Second operand 5 states and 127 transitions. [2024-11-23 22:39:05,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 192 flow [2024-11-23 22:39:05,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 22:39:05,683 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 122 flow [2024-11-23 22:39:05,683 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2024-11-23 22:39:05,688 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2024-11-23 22:39:05,689 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 122 flow [2024-11-23 22:39:05,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 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) [2024-11-23 22:39:05,691 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:39:05,691 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] [2024-11-23 22:39:05,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-23 22:39:05,692 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-23 22:39:05,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:39:05,692 INFO L85 PathProgramCache]: Analyzing trace with hash 530930398, now seen corresponding path program 1 times [2024-11-23 22:39:05,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:39:05,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608247069] [2024-11-23 22:39:05,693 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:39:05,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:39:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:39:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:39:05,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:05,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608247069] [2024-11-23 22:39:05,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608247069] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:39:05,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:39:05,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 22:39:05,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576175972] [2024-11-23 22:39:05,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:39:05,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 22:39:05,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:39:05,884 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 22:39:05,884 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 22:39:05,901 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-23 22:39:05,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 122 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) [2024-11-23 22:39:05,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:39:05,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-23 22:39:05,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:39:06,139 INFO L124 PetriNetUnfolderBase]: 497/875 cut-off events. [2024-11-23 22:39:06,140 INFO L125 PetriNetUnfolderBase]: For 460/460 co-relation queries the response was YES. [2024-11-23 22:39:06,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2062 conditions, 875 events. 497/875 cut-off events. For 460/460 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4276 event pairs, 63 based on Foata normal form. 48/911 useless extension candidates. Maximal degree in co-relation 1650. Up to 522 conditions per place. [2024-11-23 22:39:06,149 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 46 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2024-11-23 22:39:06,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 306 flow [2024-11-23 22:39:06,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 22:39:06,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 22:39:06,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-11-23 22:39:06,152 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5677083333333334 [2024-11-23 22:39:06,152 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 122 flow. Second operand 4 states and 109 transitions. [2024-11-23 22:39:06,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 306 flow [2024-11-23 22:39:06,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 276 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 22:39:06,154 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 129 flow [2024-11-23 22:39:06,156 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-11-23 22:39:06,157 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2024-11-23 22:39:06,158 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 129 flow [2024-11-23 22:39:06,158 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) [2024-11-23 22:39:06,158 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:39:06,158 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] [2024-11-23 22:39:06,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-23 22:39:06,159 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-23 22:39:06,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:39:06,159 INFO L85 PathProgramCache]: Analyzing trace with hash -2062177844, now seen corresponding path program 2 times [2024-11-23 22:39:06,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:39:06,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374306166] [2024-11-23 22:39:06,160 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:39:06,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:39:06,190 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 22:39:06,190 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:39:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:39:06,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:06,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374306166] [2024-11-23 22:39:06,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374306166] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:39:06,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:39:06,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 22:39:06,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831655393] [2024-11-23 22:39:06,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:39:06,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 22:39:06,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:39:06,335 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 22:39:06,335 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 22:39:06,360 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-23 22:39:06,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 129 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) [2024-11-23 22:39:06,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:39:06,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-23 22:39:06,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:39:06,588 INFO L124 PetriNetUnfolderBase]: 489/848 cut-off events. [2024-11-23 22:39:06,588 INFO L125 PetriNetUnfolderBase]: For 302/344 co-relation queries the response was YES. [2024-11-23 22:39:06,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2078 conditions, 848 events. 489/848 cut-off events. For 302/344 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3619 event pairs, 95 based on Foata normal form. 58/905 useless extension candidates. Maximal degree in co-relation 1659. Up to 613 conditions per place. [2024-11-23 22:39:06,596 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 37 selfloop transitions, 6 changer transitions 0/55 dead transitions. [2024-11-23 22:39:06,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 262 flow [2024-11-23 22:39:06,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 22:39:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 22:39:06,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-11-23 22:39:06,598 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-11-23 22:39:06,598 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 129 flow. Second operand 4 states and 101 transitions. [2024-11-23 22:39:06,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 262 flow [2024-11-23 22:39:06,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 257 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 22:39:06,602 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 159 flow [2024-11-23 22:39:06,602 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-11-23 22:39:06,603 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2024-11-23 22:39:06,603 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 159 flow [2024-11-23 22:39:06,604 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) [2024-11-23 22:39:06,604 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:39:06,604 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] [2024-11-23 22:39:06,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-23 22:39:06,604 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-23 22:39:06,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:39:06,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1686629776, now seen corresponding path program 3 times [2024-11-23 22:39:06,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:39:06,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47931375] [2024-11-23 22:39:06,606 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 22:39:06,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:39:06,625 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 22:39:06,626 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:39:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:39:06,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:06,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47931375] [2024-11-23 22:39:06,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47931375] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:39:06,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:39:06,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 22:39:06,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103651109] [2024-11-23 22:39:06,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:39:06,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 22:39:06,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:39:06,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 22:39:06,877 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 22:39:06,920 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-23 22:39:06,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 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) [2024-11-23 22:39:06,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:39:06,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-23 22:39:06,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:39:07,264 INFO L124 PetriNetUnfolderBase]: 564/1015 cut-off events. [2024-11-23 22:39:07,265 INFO L125 PetriNetUnfolderBase]: For 608/618 co-relation queries the response was YES. [2024-11-23 22:39:07,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2635 conditions, 1015 events. 564/1015 cut-off events. For 608/618 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5071 event pairs, 142 based on Foata normal form. 62/1068 useless extension candidates. Maximal degree in co-relation 2041. Up to 552 conditions per place. [2024-11-23 22:39:07,273 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 53 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2024-11-23 22:39:07,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 72 transitions, 373 flow [2024-11-23 22:39:07,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 22:39:07,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 22:39:07,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-11-23 22:39:07,276 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-11-23 22:39:07,276 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 159 flow. Second operand 5 states and 132 transitions. [2024-11-23 22:39:07,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 72 transitions, 373 flow [2024-11-23 22:39:07,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 72 transitions, 368 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 22:39:07,285 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 177 flow [2024-11-23 22:39:07,285 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2024-11-23 22:39:07,286 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 6 predicate places. [2024-11-23 22:39:07,286 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 177 flow [2024-11-23 22:39:07,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 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) [2024-11-23 22:39:07,287 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:39:07,287 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] [2024-11-23 22:39:07,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-23 22:39:07,287 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-23 22:39:07,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:39:07,288 INFO L85 PathProgramCache]: Analyzing trace with hash 932407458, now seen corresponding path program 4 times [2024-11-23 22:39:07,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:39:07,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009621829] [2024-11-23 22:39:07,288 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 22:39:07,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:39:07,316 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 22:39:07,316 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:39:07,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:39:07,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:07,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009621829] [2024-11-23 22:39:07,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009621829] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:39:07,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:39:07,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 22:39:07,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360761705] [2024-11-23 22:39:07,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:39:07,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 22:39:07,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:39:07,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 22:39:07,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 22:39:07,500 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-23 22:39:07,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 177 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) [2024-11-23 22:39:07,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:39:07,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-23 22:39:07,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:39:07,845 INFO L124 PetriNetUnfolderBase]: 740/1385 cut-off events. [2024-11-23 22:39:07,845 INFO L125 PetriNetUnfolderBase]: For 1297/1355 co-relation queries the response was YES. [2024-11-23 22:39:07,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3583 conditions, 1385 events. 740/1385 cut-off events. For 1297/1355 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7710 event pairs, 212 based on Foata normal form. 100/1438 useless extension candidates. Maximal degree in co-relation 3042. Up to 667 conditions per place. [2024-11-23 22:39:07,860 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 46 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2024-11-23 22:39:07,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 353 flow [2024-11-23 22:39:07,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 22:39:07,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 22:39:07,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-11-23 22:39:07,863 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-11-23 22:39:07,863 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 177 flow. Second operand 5 states and 126 transitions. [2024-11-23 22:39:07,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 353 flow [2024-11-23 22:39:07,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 66 transitions, 342 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 22:39:07,870 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 189 flow [2024-11-23 22:39:07,870 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=189, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2024-11-23 22:39:07,871 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2024-11-23 22:39:07,871 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 189 flow [2024-11-23 22:39:07,872 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) [2024-11-23 22:39:07,873 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:39:07,873 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] [2024-11-23 22:39:07,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-23 22:39:07,873 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-23 22:39:07,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:39:07,874 INFO L85 PathProgramCache]: Analyzing trace with hash -869113440, now seen corresponding path program 5 times [2024-11-23 22:39:07,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:39:07,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032199108] [2024-11-23 22:39:07,874 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 22:39:07,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:39:07,902 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:39:07,906 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:39:08,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:39:08,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:08,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032199108] [2024-11-23 22:39:08,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032199108] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:39:08,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:39:08,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 22:39:08,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769193157] [2024-11-23 22:39:08,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:39:08,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 22:39:08,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:39:08,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 22:39:08,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 22:39:08,242 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-23 22:39:08,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 189 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) [2024-11-23 22:39:08,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:39:08,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-23 22:39:08,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:39:08,711 INFO L124 PetriNetUnfolderBase]: 1003/1803 cut-off events. [2024-11-23 22:39:08,711 INFO L125 PetriNetUnfolderBase]: For 1597/1613 co-relation queries the response was YES. [2024-11-23 22:39:08,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4770 conditions, 1803 events. 1003/1803 cut-off events. For 1597/1613 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10265 event pairs, 210 based on Foata normal form. 117/1868 useless extension candidates. Maximal degree in co-relation 4295. Up to 476 conditions per place. [2024-11-23 22:39:08,726 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 53 selfloop transitions, 5 changer transitions 7/77 dead transitions. [2024-11-23 22:39:08,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 77 transitions, 433 flow [2024-11-23 22:39:08,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 22:39:08,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 22:39:08,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-11-23 22:39:08,727 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-11-23 22:39:08,728 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 189 flow. Second operand 5 states and 136 transitions. [2024-11-23 22:39:08,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 77 transitions, 433 flow [2024-11-23 22:39:08,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 77 transitions, 421 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 22:39:08,733 INFO L231 Difference]: Finished difference. Result has 61 places, 44 transitions, 192 flow [2024-11-23 22:39:08,733 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=192, PETRI_PLACES=61, PETRI_TRANSITIONS=44} [2024-11-23 22:39:08,734 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 11 predicate places. [2024-11-23 22:39:08,734 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 44 transitions, 192 flow [2024-11-23 22:39:08,734 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) [2024-11-23 22:39:08,734 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:39:08,735 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:39:08,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-23 22:39:08,735 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-23 22:39:08,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:39:08,736 INFO L85 PathProgramCache]: Analyzing trace with hash -387412801, now seen corresponding path program 1 times [2024-11-23 22:39:08,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:39:08,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256911382] [2024-11-23 22:39:08,736 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:39:08,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:39:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:39:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 22:39:09,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:09,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256911382] [2024-11-23 22:39:09,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256911382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:39:09,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258446873] [2024-11-23 22:39:09,683 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:39:09,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:39:09,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:39:09,686 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:39:09,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 22:39:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:39:09,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-23 22:39:09,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:39:09,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-23 22:39:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 22:39:10,481 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:39:11,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2024-11-23 22:39:11,887 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 22:39:11,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2024-11-23 22:39:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 22:39:12,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258446873] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:39:12,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:39:12,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 28 [2024-11-23 22:39:12,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523995371] [2024-11-23 22:39:12,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:39:12,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-23 22:39:12,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:39:12,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-23 22:39:12,187 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2024-11-23 22:39:12,526 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-11-23 22:39:12,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 44 transitions, 192 flow. Second operand has 29 states, 29 states have (on average 12.689655172413794) internal successors, (368), 29 states have internal predecessors, (368), 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) [2024-11-23 22:39:12,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:39:12,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-11-23 22:39:12,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:39:19,996 INFO L124 PetriNetUnfolderBase]: 12007/17737 cut-off events. [2024-11-23 22:39:19,997 INFO L125 PetriNetUnfolderBase]: For 19316/19316 co-relation queries the response was YES. [2024-11-23 22:39:20,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50225 conditions, 17737 events. 12007/17737 cut-off events. For 19316/19316 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 105660 event pairs, 981 based on Foata normal form. 696/18428 useless extension candidates. Maximal degree in co-relation 26003. Up to 3565 conditions per place. [2024-11-23 22:39:20,083 INFO L140 encePairwiseOnDemand]: 31/48 looper letters, 351 selfloop transitions, 117 changer transitions 92/564 dead transitions. [2024-11-23 22:39:20,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 564 transitions, 3337 flow [2024-11-23 22:39:20,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-23 22:39:20,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2024-11-23 22:39:20,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 1097 transitions. [2024-11-23 22:39:20,092 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40095029239766083 [2024-11-23 22:39:20,096 INFO L175 Difference]: Start difference. First operand has 61 places, 44 transitions, 192 flow. Second operand 57 states and 1097 transitions. [2024-11-23 22:39:20,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 564 transitions, 3337 flow [2024-11-23 22:39:20,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 564 transitions, 3234 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-11-23 22:39:20,128 INFO L231 Difference]: Finished difference. Result has 146 places, 166 transitions, 1289 flow [2024-11-23 22:39:20,130 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1289, PETRI_PLACES=146, PETRI_TRANSITIONS=166} [2024-11-23 22:39:20,130 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 96 predicate places. [2024-11-23 22:39:20,131 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 166 transitions, 1289 flow [2024-11-23 22:39:20,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 12.689655172413794) internal successors, (368), 29 states have internal predecessors, (368), 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) [2024-11-23 22:39:20,131 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:39:20,132 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:39:20,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-23 22:39:20,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-23 22:39:20,333 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-23 22:39:20,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:39:20,333 INFO L85 PathProgramCache]: Analyzing trace with hash -394733690, now seen corresponding path program 2 times [2024-11-23 22:39:20,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:39:20,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784144243] [2024-11-23 22:39:20,334 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:39:20,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:39:20,375 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:39:20,376 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:39:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 22:39:20,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:20,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784144243] [2024-11-23 22:39:20,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784144243] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:39:20,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:39:20,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 22:39:20,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634060468] [2024-11-23 22:39:20,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:39:20,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 22:39:20,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:39:20,486 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 22:39:20,487 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 22:39:20,487 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-23 22:39:20,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 166 transitions, 1289 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 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) [2024-11-23 22:39:20,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:39:20,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-23 22:39:20,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:39:21,466 INFO L124 PetriNetUnfolderBase]: 2082/3910 cut-off events. [2024-11-23 22:39:21,466 INFO L125 PetriNetUnfolderBase]: For 54010/54262 co-relation queries the response was YES. [2024-11-23 22:39:21,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20741 conditions, 3910 events. 2082/3910 cut-off events. For 54010/54262 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 24850 event pairs, 475 based on Foata normal form. 276/3891 useless extension candidates. Maximal degree in co-relation 18141. Up to 1551 conditions per place. [2024-11-23 22:39:21,520 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 113 selfloop transitions, 47 changer transitions 0/226 dead transitions. [2024-11-23 22:39:21,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 226 transitions, 2142 flow [2024-11-23 22:39:21,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 22:39:21,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 22:39:21,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-11-23 22:39:21,522 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.640625 [2024-11-23 22:39:21,523 INFO L175 Difference]: Start difference. First operand has 146 places, 166 transitions, 1289 flow. Second operand 4 states and 123 transitions. [2024-11-23 22:39:21,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 226 transitions, 2142 flow [2024-11-23 22:39:21,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 226 transitions, 1782 flow, removed 112 selfloop flow, removed 15 redundant places. [2024-11-23 22:39:21,668 INFO L231 Difference]: Finished difference. Result has 136 places, 204 transitions, 1551 flow [2024-11-23 22:39:21,669 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1551, PETRI_PLACES=136, PETRI_TRANSITIONS=204} [2024-11-23 22:39:21,670 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 86 predicate places. [2024-11-23 22:39:21,670 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 204 transitions, 1551 flow [2024-11-23 22:39:21,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 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) [2024-11-23 22:39:21,670 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:39:21,670 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:39:21,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-23 22:39:21,671 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-23 22:39:21,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:39:21,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1768465980, now seen corresponding path program 3 times [2024-11-23 22:39:21,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:39:21,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753920608] [2024-11-23 22:39:21,672 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 22:39:21,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:39:21,728 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 22:39:21,731 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:39:22,260 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-23 22:39:22,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:22,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753920608] [2024-11-23 22:39:22,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753920608] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:39:22,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:39:22,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-23 22:39:22,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270335498] [2024-11-23 22:39:22,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:39:22,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 22:39:22,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:39:22,262 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 22:39:22,263 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-23 22:39:22,333 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-23 22:39:22,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 204 transitions, 1551 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-11-23 22:39:22,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:39:22,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-23 22:39:22,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:39:24,258 INFO L124 PetriNetUnfolderBase]: 4290/7539 cut-off events. [2024-11-23 22:39:24,259 INFO L125 PetriNetUnfolderBase]: For 81442/81526 co-relation queries the response was YES. [2024-11-23 22:39:24,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38708 conditions, 7539 events. 4290/7539 cut-off events. For 81442/81526 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 50296 event pairs, 775 based on Foata normal form. 236/7419 useless extension candidates. Maximal degree in co-relation 28976. Up to 2376 conditions per place. [2024-11-23 22:39:24,313 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 175 selfloop transitions, 49 changer transitions 54/315 dead transitions. [2024-11-23 22:39:24,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 315 transitions, 3177 flow [2024-11-23 22:39:24,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 22:39:24,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 22:39:24,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-11-23 22:39:24,315 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-11-23 22:39:24,316 INFO L175 Difference]: Start difference. First operand has 136 places, 204 transitions, 1551 flow. Second operand 8 states and 200 transitions. [2024-11-23 22:39:24,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 315 transitions, 3177 flow [2024-11-23 22:39:24,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 315 transitions, 3107 flow, removed 35 selfloop flow, removed 0 redundant places. [2024-11-23 22:39:24,449 INFO L231 Difference]: Finished difference. Result has 145 places, 213 transitions, 1779 flow [2024-11-23 22:39:24,449 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1779, PETRI_PLACES=145, PETRI_TRANSITIONS=213} [2024-11-23 22:39:24,450 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 95 predicate places. [2024-11-23 22:39:24,450 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 213 transitions, 1779 flow [2024-11-23 22:39:24,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-11-23 22:39:24,450 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:39:24,451 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:39:24,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-23 22:39:24,451 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-23 22:39:24,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:39:24,452 INFO L85 PathProgramCache]: Analyzing trace with hash -754410586, now seen corresponding path program 4 times [2024-11-23 22:39:24,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:39:24,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232778329] [2024-11-23 22:39:24,452 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 22:39:24,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:39:24,513 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 22:39:24,513 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:39:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 22:39:24,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:24,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232778329] [2024-11-23 22:39:24,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232778329] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:39:24,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:39:24,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 22:39:24,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736448609] [2024-11-23 22:39:24,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:39:24,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 22:39:24,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:39:24,870 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 22:39:24,870 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 22:39:24,876 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-23 22:39:24,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 213 transitions, 1779 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2024-11-23 22:39:24,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:39:24,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-23 22:39:24,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:39:25,996 INFO L124 PetriNetUnfolderBase]: 3332/5927 cut-off events. [2024-11-23 22:39:25,996 INFO L125 PetriNetUnfolderBase]: For 64999/65381 co-relation queries the response was YES. [2024-11-23 22:39:26,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30626 conditions, 5927 events. 3332/5927 cut-off events. For 64999/65381 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 37525 event pairs, 605 based on Foata normal form. 527/6135 useless extension candidates. Maximal degree in co-relation 27353. Up to 2545 conditions per place. [2024-11-23 22:39:26,039 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 149 selfloop transitions, 6 changer transitions 3/198 dead transitions. [2024-11-23 22:39:26,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 198 transitions, 2098 flow [2024-11-23 22:39:26,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 22:39:26,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 22:39:26,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-11-23 22:39:26,041 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-11-23 22:39:26,041 INFO L175 Difference]: Start difference. First operand has 145 places, 213 transitions, 1779 flow. Second operand 4 states and 105 transitions. [2024-11-23 22:39:26,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 198 transitions, 2098 flow [2024-11-23 22:39:26,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 198 transitions, 1957 flow, removed 40 selfloop flow, removed 11 redundant places. [2024-11-23 22:39:26,109 INFO L231 Difference]: Finished difference. Result has 129 places, 163 transitions, 1355 flow [2024-11-23 22:39:26,109 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1355, PETRI_PLACES=129, PETRI_TRANSITIONS=163} [2024-11-23 22:39:26,110 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 79 predicate places. [2024-11-23 22:39:26,110 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 163 transitions, 1355 flow [2024-11-23 22:39:26,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2024-11-23 22:39:26,110 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:39:26,110 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:39:26,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-23 22:39:26,111 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-23 22:39:26,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:39:26,112 INFO L85 PathProgramCache]: Analyzing trace with hash -204723836, now seen corresponding path program 1 times [2024-11-23 22:39:26,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:39:26,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925065519] [2024-11-23 22:39:26,112 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:39:26,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:39:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:39:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 22:39:28,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:28,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925065519] [2024-11-23 22:39:28,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925065519] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:39:28,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136018045] [2024-11-23 22:39:28,399 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:39:28,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:39:28,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:39:28,402 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:39:28,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 22:39:28,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:39:28,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-23 22:39:28,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:39:29,670 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2024-11-23 22:39:29,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 20 [2024-11-23 22:39:29,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 22:39:29,770 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:39:30,596 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2024-11-23 22:39:30,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 52 [2024-11-23 22:39:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 22:39:32,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136018045] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:39:32,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:39:32,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 35 [2024-11-23 22:39:32,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508827425] [2024-11-23 22:39:32,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:39:32,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-23 22:39:32,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:39:32,051 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-23 22:39:32,052 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2024-11-23 22:39:32,420 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-11-23 22:39:32,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 163 transitions, 1355 flow. Second operand has 36 states, 36 states have (on average 13.833333333333334) internal successors, (498), 36 states have internal predecessors, (498), 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) [2024-11-23 22:39:32,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:39:32,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-11-23 22:39:32,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:40:13,739 INFO L124 PetriNetUnfolderBase]: 63936/101292 cut-off events. [2024-11-23 22:40:13,739 INFO L125 PetriNetUnfolderBase]: For 616989/617245 co-relation queries the response was YES. [2024-11-23 22:40:14,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445237 conditions, 101292 events. 63936/101292 cut-off events. For 616989/617245 co-relation queries the response was YES. Maximal size of possible extension queue 1745. Compared 788086 event pairs, 3428 based on Foata normal form. 4722/105512 useless extension candidates. Maximal degree in co-relation 353065. Up to 14348 conditions per place. [2024-11-23 22:40:14,558 INFO L140 encePairwiseOnDemand]: 31/48 looper letters, 2040 selfloop transitions, 1095 changer transitions 641/3783 dead transitions. [2024-11-23 22:40:14,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 3783 transitions, 36455 flow [2024-11-23 22:40:14,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2024-11-23 22:40:14,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2024-11-23 22:40:14,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 4380 transitions. [2024-11-23 22:40:14,575 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44730392156862747 [2024-11-23 22:40:14,575 INFO L175 Difference]: Start difference. First operand has 129 places, 163 transitions, 1355 flow. Second operand 204 states and 4380 transitions. [2024-11-23 22:40:14,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 3783 transitions, 36455 flow [2024-11-23 22:40:15,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 3783 transitions, 36191 flow, removed 129 selfloop flow, removed 1 redundant places. [2024-11-23 22:40:15,500 INFO L231 Difference]: Finished difference. Result has 426 places, 1377 transitions, 17312 flow [2024-11-23 22:40:15,500 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1321, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=204, PETRI_FLOW=17312, PETRI_PLACES=426, PETRI_TRANSITIONS=1377} [2024-11-23 22:40:15,501 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 376 predicate places. [2024-11-23 22:40:15,501 INFO L471 AbstractCegarLoop]: Abstraction has has 426 places, 1377 transitions, 17312 flow [2024-11-23 22:40:15,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 13.833333333333334) internal successors, (498), 36 states have internal predecessors, (498), 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) [2024-11-23 22:40:15,502 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:40:15,502 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:40:15,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-23 22:40:15,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-23 22:40:15,703 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-23 22:40:15,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:40:15,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1148571384, now seen corresponding path program 2 times [2024-11-23 22:40:15,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:40:15,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029956785] [2024-11-23 22:40:15,704 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:40:15,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:40:15,784 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:40:15,784 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:40:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 22:40:17,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:40:17,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029956785] [2024-11-23 22:40:17,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029956785] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:40:17,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948359906] [2024-11-23 22:40:17,260 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:40:17,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:40:17,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:40:17,262 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:40:17,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60377e2-6bbb-432c-bc6b-5f0c56f86a2e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 22:40:17,395 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:40:17,396 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:40:17,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-23 22:40:17,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:40:17,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-23 22:40:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 22:40:18,553 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:40:20,329 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 116 treesize of output 104 [2024-11-23 22:40:20,371 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2024-11-23 22:40:20,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 232 treesize of output 196 [2024-11-23 22:40:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 22:40:21,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948359906] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:40:21,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:40:21,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 38 [2024-11-23 22:40:21,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438060926] [2024-11-23 22:40:21,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:40:21,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-23 22:40:21,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:40:21,727 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-23 22:40:21,727 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2024-11-23 22:40:22,405 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-11-23 22:40:22,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 1377 transitions, 17312 flow. Second operand has 39 states, 39 states have (on average 17.205128205128204) internal successors, (671), 39 states have internal predecessors, (671), 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) [2024-11-23 22:40:22,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:40:22,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-11-23 22:40:22,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand