./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1 --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 d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 13:14:17,499 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 13:14:17,556 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 13:14:17,562 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 13:14:17,562 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 13:14:17,584 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 13:14:17,585 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 13:14:17,585 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 13:14:17,585 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 13:14:17,585 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 13:14:17,585 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 13:14:17,585 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 13:14:17,586 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 13:14:17,586 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 13:14:17,586 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 13:14:17,586 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 13:14:17,586 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 13:14:17,586 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 13:14:17,586 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 13:14:17,586 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 13:14:17,586 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 13:14:17,586 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 13:14:17,587 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 13:14:17,587 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 13:14:17,587 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 13:14:17,587 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 13:14:17,587 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 13:14:17,587 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 13:14:17,587 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 13:14:17,587 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 13:14:17,587 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 13:14:17,587 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 13:14:17,587 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 13:14:17,587 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:14:17,587 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 13:14:17,588 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 13:14:17,588 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 13:14:17,588 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 13:14:17,588 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:14:17,588 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 13:14:17,588 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 13:14:17,588 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 13:14:17,588 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 13:14:17,588 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 13:14:17,588 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 13:14:17,588 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 13:14:17,588 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 13:14:17,588 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_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1 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 -> d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 [2024-12-02 13:14:17,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 13:14:17,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 13:14:17,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 13:14:17,841 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 13:14:17,841 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 13:14:17,842 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-12-02 13:14:20,441 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/data/da4f3efe7/ea9ada14200e43d98e0f8f73f819c065/FLAG7b0c681e0 [2024-12-02 13:14:20,676 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 13:14:20,676 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-12-02 13:14:20,684 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/data/da4f3efe7/ea9ada14200e43d98e0f8f73f819c065/FLAG7b0c681e0 [2024-12-02 13:14:20,697 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/data/da4f3efe7/ea9ada14200e43d98e0f8f73f819c065 [2024-12-02 13:14:20,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 13:14:20,700 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 13:14:20,701 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 13:14:20,701 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 13:14:20,704 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 13:14:20,705 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:14:20" (1/1) ... [2024-12-02 13:14:20,705 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4361646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:20, skipping insertion in model container [2024-12-02 13:14:20,705 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:14:20" (1/1) ... [2024-12-02 13:14:20,718 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 13:14:20,842 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-02 13:14:20,845 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 13:14:20,854 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 13:14:20,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 13:14:20,885 INFO L204 MainTranslator]: Completed translation [2024-12-02 13:14:20,885 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:20 WrapperNode [2024-12-02 13:14:20,886 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 13:14:20,886 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 13:14:20,887 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 13:14:20,887 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 13:14:20,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:20" (1/1) ... [2024-12-02 13:14:20,897 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:20" (1/1) ... [2024-12-02 13:14:20,916 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 138 [2024-12-02 13:14:20,917 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 13:14:20,917 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 13:14:20,917 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 13:14:20,918 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 13:14:20,924 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:20" (1/1) ... [2024-12-02 13:14:20,925 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:20" (1/1) ... [2024-12-02 13:14:20,927 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:20" (1/1) ... [2024-12-02 13:14:20,939 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]. [2024-12-02 13:14:20,939 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:20" (1/1) ... [2024-12-02 13:14:20,939 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:20" (1/1) ... [2024-12-02 13:14:20,943 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:20" (1/1) ... [2024-12-02 13:14:20,944 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:20" (1/1) ... [2024-12-02 13:14:20,946 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:20" (1/1) ... [2024-12-02 13:14:20,947 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:20" (1/1) ... [2024-12-02 13:14:20,947 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:20" (1/1) ... [2024-12-02 13:14:20,949 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 13:14:20,949 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 13:14:20,949 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 13:14:20,949 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 13:14:20,950 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:20" (1/1) ... [2024-12-02 13:14:20,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:14:20,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:14:20,973 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 13:14:20,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 13:14:20,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 13:14:20,995 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 13:14:20,995 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 13:14:20,995 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 13:14:20,995 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 13:14:20,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 13:14:20,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 13:14:20,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 13:14:20,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 13:14:20,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-12-02 13:14:20,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-12-02 13:14:20,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 13:14:20,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 13:14:20,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 13:14:20,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 13:14:20,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 13:14:20,998 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-12-02 13:14:21,083 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 13:14:21,084 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 13:14:21,339 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 13:14:21,339 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 13:14:21,509 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 13:14:21,509 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-12-02 13:14:21,509 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:14:21 BoogieIcfgContainer [2024-12-02 13:14:21,510 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 13:14:21,512 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 13:14:21,512 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 13:14:21,517 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 13:14:21,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:14:20" (1/3) ... [2024-12-02 13:14:21,517 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64e43a64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:14:21, skipping insertion in model container [2024-12-02 13:14:21,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:20" (2/3) ... [2024-12-02 13:14:21,518 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64e43a64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:14:21, skipping insertion in model container [2024-12-02 13:14:21,518 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:14:21" (3/3) ... [2024-12-02 13:14:21,519 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2024-12-02 13:14:21,535 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 13:14:21,537 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-send-receive-alt.wvr.c that has 3 procedures, 38 locations, 1 initial locations, 3 loop locations, and 10 error locations. [2024-12-02 13:14:21,537 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 13:14:21,590 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-12-02 13:14:21,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 43 transitions, 100 flow [2024-12-02 13:14:21,654 INFO L124 PetriNetUnfolderBase]: 6/41 cut-off events. [2024-12-02 13:14:21,656 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-12-02 13:14:21,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 41 events. 6/41 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 83 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-12-02 13:14:21,660 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 43 transitions, 100 flow [2024-12-02 13:14:21,663 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 40 transitions, 92 flow [2024-12-02 13:14:21,669 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 13:14:21,680 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;@59ffe9a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 13:14:21,680 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-12-02 13:14:21,683 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 13:14:21,683 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-12-02 13:14:21,683 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 13:14:21,683 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:21,684 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 13:14:21,684 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:14:21,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:21,689 INFO L85 PathProgramCache]: Analyzing trace with hash 456708, now seen corresponding path program 1 times [2024-12-02 13:14:21,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:21,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211032129] [2024-12-02 13:14:21,695 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:14:21,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:14:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:14:21,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:21,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211032129] [2024-12-02 13:14:21,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211032129] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:14:21,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:14:21,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-12-02 13:14:21,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110878114] [2024-12-02 13:14:21,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:14:21,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 13:14:21,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:21,921 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 13:14:21,922 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 13:14:21,929 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-12-02 13:14:21,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-12-02 13:14:21,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:21,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-12-02 13:14:21,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:14:22,094 INFO L124 PetriNetUnfolderBase]: 308/550 cut-off events. [2024-12-02 13:14:22,094 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-12-02 13:14:22,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 550 events. 308/550 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2436 event pairs, 250 based on Foata normal form. 1/376 useless extension candidates. Maximal degree in co-relation 1005. Up to 497 conditions per place. [2024-12-02 13:14:22,100 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-12-02 13:14:22,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 140 flow [2024-12-02 13:14:22,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 13:14:22,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 13:14:22,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-12-02 13:14:22,112 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-12-02 13:14:22,113 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 92 flow. Second operand 3 states and 60 transitions. [2024-12-02 13:14:22,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 140 flow [2024-12-02 13:14:22,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 132 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-02 13:14:22,119 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 78 flow [2024-12-02 13:14:22,121 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2024-12-02 13:14:22,123 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -5 predicate places. [2024-12-02 13:14:22,123 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 78 flow [2024-12-02 13:14:22,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-12-02 13:14:22,124 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:22,124 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 13:14:22,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 13:14:22,124 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:14:22,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:22,125 INFO L85 PathProgramCache]: Analyzing trace with hash 456709, now seen corresponding path program 1 times [2024-12-02 13:14:22,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:22,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846616719] [2024-12-02 13:14:22,125 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:14:22,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:14:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:14:22,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:22,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846616719] [2024-12-02 13:14:22,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846616719] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:14:22,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:14:22,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 13:14:22,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245807983] [2024-12-02 13:14:22,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:14:22,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 13:14:22,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:22,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 13:14:22,392 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 13:14:22,405 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-12-02 13:14:22,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2024-12-02 13:14:22,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:22,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-12-02 13:14:22,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:14:22,595 INFO L124 PetriNetUnfolderBase]: 309/553 cut-off events. [2024-12-02 13:14:22,595 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-12-02 13:14:22,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1071 conditions, 553 events. 309/553 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2445 event pairs, 250 based on Foata normal form. 0/378 useless extension candidates. Maximal degree in co-relation 1049. Up to 502 conditions per place. [2024-12-02 13:14:22,599 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 29 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2024-12-02 13:14:22,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 152 flow [2024-12-02 13:14:22,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 13:14:22,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 13:14:22,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-12-02 13:14:22,601 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-12-02 13:14:22,601 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 78 flow. Second operand 4 states and 70 transitions. [2024-12-02 13:14:22,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 152 flow [2024-12-02 13:14:22,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 13:14:22,603 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 101 flow [2024-12-02 13:14:22,603 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2024-12-02 13:14:22,604 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2024-12-02 13:14:22,604 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 101 flow [2024-12-02 13:14:22,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2024-12-02 13:14:22,604 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:22,604 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-12-02 13:14:22,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 13:14:22,605 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:14:22,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:22,605 INFO L85 PathProgramCache]: Analyzing trace with hash 438911998, now seen corresponding path program 1 times [2024-12-02 13:14:22,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:22,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909837097] [2024-12-02 13:14:22,606 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:14:22,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:22,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:14:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:14:22,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:22,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909837097] [2024-12-02 13:14:22,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909837097] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:14:22,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974020114] [2024-12-02 13:14:22,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:14:22,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:14:22,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:14:22,871 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:14:22,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 13:14:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:14:22,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 13:14:22,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:14:22,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-12-02 13:14:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:14:23,142 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:14:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:14:23,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974020114] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:14:23,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:14:23,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-12-02 13:14:23,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665470375] [2024-12-02 13:14:23,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:14:23,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 13:14:23,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:23,285 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 13:14:23,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-12-02 13:14:23,328 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-12-02 13:14:23,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 101 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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) [2024-12-02 13:14:23,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:23,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-12-02 13:14:23,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:14:23,656 INFO L124 PetriNetUnfolderBase]: 309/552 cut-off events. [2024-12-02 13:14:23,656 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-12-02 13:14:23,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 552 events. 309/552 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2423 event pairs, 250 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 1056. Up to 498 conditions per place. [2024-12-02 13:14:23,660 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 25 selfloop transitions, 7 changer transitions 0/37 dead transitions. [2024-12-02 13:14:23,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 161 flow [2024-12-02 13:14:23,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 13:14:23,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 13:14:23,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 87 transitions. [2024-12-02 13:14:23,662 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3372093023255814 [2024-12-02 13:14:23,662 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 101 flow. Second operand 6 states and 87 transitions. [2024-12-02 13:14:23,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 161 flow [2024-12-02 13:14:23,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 13:14:23,663 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 108 flow [2024-12-02 13:14:23,664 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-12-02 13:14:23,664 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2024-12-02 13:14:23,664 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 108 flow [2024-12-02 13:14:23,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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) [2024-12-02 13:14:23,665 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:23,665 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:14:23,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-12-02 13:14:23,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:14:23,865 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:14:23,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:23,866 INFO L85 PathProgramCache]: Analyzing trace with hash 952520465, now seen corresponding path program 1 times [2024-12-02 13:14:23,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:23,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969585907] [2024-12-02 13:14:23,866 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:14:23,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:14:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:14:23,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:23,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969585907] [2024-12-02 13:14:23,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969585907] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:14:23,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:14:23,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-12-02 13:14:23,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156291453] [2024-12-02 13:14:23,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:14:23,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 13:14:23,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:23,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 13:14:23,911 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 13:14:23,912 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-12-02 13:14:23,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-12-02 13:14:23,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:23,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-12-02 13:14:23,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:14:24,059 INFO L124 PetriNetUnfolderBase]: 404/742 cut-off events. [2024-12-02 13:14:24,059 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-12-02 13:14:24,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1454 conditions, 742 events. 404/742 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3420 event pairs, 186 based on Foata normal form. 22/525 useless extension candidates. Maximal degree in co-relation 1428. Up to 420 conditions per place. [2024-12-02 13:14:24,063 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 47 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2024-12-02 13:14:24,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 246 flow [2024-12-02 13:14:24,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 13:14:24,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 13:14:24,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-12-02 13:14:24,065 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6201550387596899 [2024-12-02 13:14:24,065 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 108 flow. Second operand 3 states and 80 transitions. [2024-12-02 13:14:24,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 246 flow [2024-12-02 13:14:24,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 55 transitions, 216 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-12-02 13:14:24,067 INFO L231 Difference]: Finished difference. Result has 38 places, 39 transitions, 101 flow [2024-12-02 13:14:24,067 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2024-12-02 13:14:24,067 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2024-12-02 13:14:24,068 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 101 flow [2024-12-02 13:14:24,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-12-02 13:14:24,068 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:24,068 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:14:24,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 13:14:24,068 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:14:24,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:24,068 INFO L85 PathProgramCache]: Analyzing trace with hash -478344103, now seen corresponding path program 1 times [2024-12-02 13:14:24,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:24,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442795140] [2024-12-02 13:14:24,069 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:14:24,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:14:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:14:24,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:24,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442795140] [2024-12-02 13:14:24,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442795140] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:14:24,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:14:24,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 13:14:24,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615530970] [2024-12-02 13:14:24,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:14:24,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 13:14:24,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:24,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 13:14:24,127 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 13:14:24,133 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-12-02 13:14:24,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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) [2024-12-02 13:14:24,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:24,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-12-02 13:14:24,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:14:24,233 INFO L124 PetriNetUnfolderBase]: 303/568 cut-off events. [2024-12-02 13:14:24,233 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-12-02 13:14:24,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 568 events. 303/568 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2457 event pairs, 246 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 460. Up to 510 conditions per place. [2024-12-02 13:14:24,236 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 28 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2024-12-02 13:14:24,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 36 transitions, 155 flow [2024-12-02 13:14:24,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 13:14:24,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 13:14:24,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-12-02 13:14:24,237 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-12-02 13:14:24,237 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 101 flow. Second operand 4 states and 65 transitions. [2024-12-02 13:14:24,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 36 transitions, 155 flow [2024-12-02 13:14:24,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 13:14:24,239 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 96 flow [2024-12-02 13:14:24,239 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2024-12-02 13:14:24,239 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2024-12-02 13:14:24,239 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 96 flow [2024-12-02 13:14:24,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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) [2024-12-02 13:14:24,240 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:24,240 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:14:24,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 13:14:24,240 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:14:24,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:24,240 INFO L85 PathProgramCache]: Analyzing trace with hash -478344102, now seen corresponding path program 1 times [2024-12-02 13:14:24,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:24,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004924340] [2024-12-02 13:14:24,241 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:14:24,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:14:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:14:24,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:24,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004924340] [2024-12-02 13:14:24,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004924340] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:14:24,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:14:24,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 13:14:24,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922140622] [2024-12-02 13:14:24,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:14:24,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 13:14:24,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:24,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 13:14:24,302 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 13:14:24,305 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-12-02 13:14:24,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:14:24,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:24,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-12-02 13:14:24,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:14:24,451 INFO L124 PetriNetUnfolderBase]: 370/705 cut-off events. [2024-12-02 13:14:24,452 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-12-02 13:14:24,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 705 events. 370/705 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3142 event pairs, 314 based on Foata normal form. 0/599 useless extension candidates. Maximal degree in co-relation 1155. Up to 513 conditions per place. [2024-12-02 13:14:24,455 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 42 selfloop transitions, 3 changer transitions 1/51 dead transitions. [2024-12-02 13:14:24,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 222 flow [2024-12-02 13:14:24,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 13:14:24,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 13:14:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-12-02 13:14:24,456 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4941860465116279 [2024-12-02 13:14:24,456 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 96 flow. Second operand 4 states and 85 transitions. [2024-12-02 13:14:24,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 222 flow [2024-12-02 13:14:24,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 218 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 13:14:24,457 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 101 flow [2024-12-02 13:14:24,458 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2024-12-02 13:14:24,458 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2024-12-02 13:14:24,458 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 101 flow [2024-12-02 13:14:24,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:14:24,458 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:24,458 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:14:24,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-02 13:14:24,459 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:14:24,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:24,459 INFO L85 PathProgramCache]: Analyzing trace with hash -2126182847, now seen corresponding path program 1 times [2024-12-02 13:14:24,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:24,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858826187] [2024-12-02 13:14:24,459 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:14:24,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:14:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:14:24,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:24,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858826187] [2024-12-02 13:14:24,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858826187] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:14:24,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117829404] [2024-12-02 13:14:24,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:14:24,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:14:24,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:14:24,656 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:14:24,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 13:14:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:14:24,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 13:14:24,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:14:24,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:14:24,834 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:14:24,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117829404] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:14:24,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 13:14:24,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-12-02 13:14:24,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115174160] [2024-12-02 13:14:24,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:14:24,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 13:14:24,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:24,835 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 13:14:24,835 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-12-02 13:14:24,850 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-12-02 13:14:24,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 101 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:14:24,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:24,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-12-02 13:14:24,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:14:25,015 INFO L124 PetriNetUnfolderBase]: 281/562 cut-off events. [2024-12-02 13:14:25,015 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-12-02 13:14:25,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1166 conditions, 562 events. 281/562 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2423 event pairs, 202 based on Foata normal form. 48/546 useless extension candidates. Maximal degree in co-relation 870. Up to 437 conditions per place. [2024-12-02 13:14:25,019 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 27 selfloop transitions, 8 changer transitions 0/40 dead transitions. [2024-12-02 13:14:25,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 40 transitions, 180 flow [2024-12-02 13:14:25,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:14:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:14:25,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-12-02 13:14:25,020 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-12-02 13:14:25,020 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 101 flow. Second operand 5 states and 84 transitions. [2024-12-02 13:14:25,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 40 transitions, 180 flow [2024-12-02 13:14:25,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 40 transitions, 175 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 13:14:25,022 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 104 flow [2024-12-02 13:14:25,022 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=104, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2024-12-02 13:14:25,023 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2024-12-02 13:14:25,023 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 104 flow [2024-12-02 13:14:25,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:14:25,023 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:25,023 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:14:25,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 13:14:25,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-12-02 13:14:25,223 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:14:25,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:25,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1091846263, now seen corresponding path program 1 times [2024-12-02 13:14:25,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:25,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628364707] [2024-12-02 13:14:25,224 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:14:25,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:14:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:14:25,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:25,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628364707] [2024-12-02 13:14:25,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628364707] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:14:25,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:14:25,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 13:14:25,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240497884] [2024-12-02 13:14:25,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:14:25,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 13:14:25,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:25,279 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 13:14:25,279 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 13:14:25,279 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-12-02 13:14:25,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2024-12-02 13:14:25,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:25,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-12-02 13:14:25,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:14:25,400 INFO L124 PetriNetUnfolderBase]: 355/670 cut-off events. [2024-12-02 13:14:25,400 INFO L125 PetriNetUnfolderBase]: For 271/271 co-relation queries the response was YES. [2024-12-02 13:14:25,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1529 conditions, 670 events. 355/670 cut-off events. For 271/271 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2774 event pairs, 220 based on Foata normal form. 3/600 useless extension candidates. Maximal degree in co-relation 1228. Up to 459 conditions per place. [2024-12-02 13:14:25,403 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 35 selfloop transitions, 2 changer transitions 5/47 dead transitions. [2024-12-02 13:14:25,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 47 transitions, 232 flow [2024-12-02 13:14:25,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 13:14:25,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 13:14:25,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-12-02 13:14:25,404 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5271317829457365 [2024-12-02 13:14:25,404 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 104 flow. Second operand 3 states and 68 transitions. [2024-12-02 13:14:25,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 47 transitions, 232 flow [2024-12-02 13:14:25,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 47 transitions, 210 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-02 13:14:25,406 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 97 flow [2024-12-02 13:14:25,407 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2024-12-02 13:14:25,407 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2024-12-02 13:14:25,407 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 97 flow [2024-12-02 13:14:25,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2024-12-02 13:14:25,407 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:25,408 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:14:25,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-12-02 13:14:25,408 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:14:25,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:25,408 INFO L85 PathProgramCache]: Analyzing trace with hash 591459576, now seen corresponding path program 1 times [2024-12-02 13:14:25,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:25,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752679520] [2024-12-02 13:14:25,408 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:14:25,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:14:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:14:25,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:25,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752679520] [2024-12-02 13:14:25,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752679520] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:14:25,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227274434] [2024-12-02 13:14:25,941 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:14:25,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:14:25,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:14:25,943 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:14:25,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 13:14:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:14:26,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-12-02 13:14:26,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:14:26,078 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 [2024-12-02 13:14:26,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:14:26,393 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:14:27,006 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 [2024-12-02 13:14:27,021 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 13:14:27,021 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 [2024-12-02 13:14:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:14:27,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227274434] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:14:27,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:14:27,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-12-02 13:14:27,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468709047] [2024-12-02 13:14:27,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:14:27,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-12-02 13:14:27,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:27,154 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-12-02 13:14:27,155 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-12-02 13:14:27,215 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-12-02 13:14:27,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 97 flow. Second operand has 19 states, 19 states have (on average 13.473684210526315) internal successors, (256), 19 states have internal predecessors, (256), 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) [2024-12-02 13:14:27,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:27,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-12-02 13:14:27,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:14:28,641 INFO L124 PetriNetUnfolderBase]: 1195/2240 cut-off events. [2024-12-02 13:14:28,641 INFO L125 PetriNetUnfolderBase]: For 589/589 co-relation queries the response was YES. [2024-12-02 13:14:28,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4899 conditions, 2240 events. 1195/2240 cut-off events. For 589/589 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 12435 event pairs, 330 based on Foata normal form. 19/2014 useless extension candidates. Maximal degree in co-relation 3711. Up to 500 conditions per place. [2024-12-02 13:14:28,652 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 117 selfloop transitions, 30 changer transitions 30/182 dead transitions. [2024-12-02 13:14:28,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 182 transitions, 872 flow [2024-12-02 13:14:28,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 13:14:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-12-02 13:14:28,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 339 transitions. [2024-12-02 13:14:28,655 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49273255813953487 [2024-12-02 13:14:28,655 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 97 flow. Second operand 16 states and 339 transitions. [2024-12-02 13:14:28,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 182 transitions, 872 flow [2024-12-02 13:14:28,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 182 transitions, 848 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-12-02 13:14:28,660 INFO L231 Difference]: Finished difference. Result has 57 places, 66 transitions, 373 flow [2024-12-02 13:14:28,660 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=373, PETRI_PLACES=57, PETRI_TRANSITIONS=66} [2024-12-02 13:14:28,661 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-12-02 13:14:28,661 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 66 transitions, 373 flow [2024-12-02 13:14:28,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.473684210526315) internal successors, (256), 19 states have internal predecessors, (256), 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) [2024-12-02 13:14:28,662 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:28,662 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:14:28,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-12-02 13:14:28,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-12-02 13:14:28,862 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:14:28,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:28,863 INFO L85 PathProgramCache]: Analyzing trace with hash -794308070, now seen corresponding path program 1 times [2024-12-02 13:14:28,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:28,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383477077] [2024-12-02 13:14:28,863 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:14:28,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:14:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:14:28,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:28,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383477077] [2024-12-02 13:14:28,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383477077] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:14:28,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:14:28,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 13:14:28,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657573972] [2024-12-02 13:14:28,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:14:28,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 13:14:28,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:28,937 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 13:14:28,938 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 13:14:28,944 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-12-02 13:14:28,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 66 transitions, 373 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2024-12-02 13:14:28,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:28,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-12-02 13:14:28,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:14:29,220 INFO L124 PetriNetUnfolderBase]: 1252/2198 cut-off events. [2024-12-02 13:14:29,220 INFO L125 PetriNetUnfolderBase]: For 1483/1483 co-relation queries the response was YES. [2024-12-02 13:14:29,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5451 conditions, 2198 events. 1252/2198 cut-off events. For 1483/1483 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 11190 event pairs, 765 based on Foata normal form. 22/2066 useless extension candidates. Maximal degree in co-relation 4777. Up to 1737 conditions per place. [2024-12-02 13:14:29,231 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 65 selfloop transitions, 2 changer transitions 3/73 dead transitions. [2024-12-02 13:14:29,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 73 transitions, 516 flow [2024-12-02 13:14:29,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 13:14:29,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 13:14:29,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-12-02 13:14:29,233 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-12-02 13:14:29,233 INFO L175 Difference]: Start difference. First operand has 57 places, 66 transitions, 373 flow. Second operand 3 states and 64 transitions. [2024-12-02 13:14:29,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 73 transitions, 516 flow [2024-12-02 13:14:29,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 73 transitions, 460 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-12-02 13:14:29,241 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 262 flow [2024-12-02 13:14:29,241 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2024-12-02 13:14:29,242 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-12-02 13:14:29,242 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 262 flow [2024-12-02 13:14:29,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2024-12-02 13:14:29,242 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:29,242 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:14:29,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-12-02 13:14:29,243 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:14:29,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:29,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1568474757, now seen corresponding path program 2 times [2024-12-02 13:14:29,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:29,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36893854] [2024-12-02 13:14:29,244 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:14:29,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:29,271 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:14:29,271 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:14:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 13:14:29,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:29,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36893854] [2024-12-02 13:14:29,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36893854] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:14:29,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:14:29,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 13:14:29,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622072911] [2024-12-02 13:14:29,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:14:29,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 13:14:29,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:29,430 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 13:14:29,431 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 13:14:29,431 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-12-02 13:14:29,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 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) [2024-12-02 13:14:29,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:29,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-12-02 13:14:29,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:14:29,767 INFO L124 PetriNetUnfolderBase]: 1050/1935 cut-off events. [2024-12-02 13:14:29,767 INFO L125 PetriNetUnfolderBase]: For 1032/1032 co-relation queries the response was YES. [2024-12-02 13:14:29,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4733 conditions, 1935 events. 1050/1935 cut-off events. For 1032/1032 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 10170 event pairs, 227 based on Foata normal form. 1/1802 useless extension candidates. Maximal degree in co-relation 3878. Up to 673 conditions per place. [2024-12-02 13:14:29,777 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 70 selfloop transitions, 8 changer transitions 10/94 dead transitions. [2024-12-02 13:14:29,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 94 transitions, 548 flow [2024-12-02 13:14:29,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:14:29,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:14:29,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-12-02 13:14:29,778 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5302325581395348 [2024-12-02 13:14:29,778 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 262 flow. Second operand 5 states and 114 transitions. [2024-12-02 13:14:29,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 94 transitions, 548 flow [2024-12-02 13:14:29,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 94 transitions, 546 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 13:14:29,785 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 291 flow [2024-12-02 13:14:29,785 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=291, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-12-02 13:14:29,786 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2024-12-02 13:14:29,786 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 291 flow [2024-12-02 13:14:29,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 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) [2024-12-02 13:14:29,786 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:29,786 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-12-02 13:14:29,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-12-02 13:14:29,786 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:14:29,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:29,787 INFO L85 PathProgramCache]: Analyzing trace with hash 2051528508, now seen corresponding path program 3 times [2024-12-02 13:14:29,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:29,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138141914] [2024-12-02 13:14:29,787 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:14:29,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:29,805 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 13:14:29,806 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:14:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 13:14:29,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:29,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138141914] [2024-12-02 13:14:29,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138141914] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:14:29,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576377207] [2024-12-02 13:14:29,875 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:14:29,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:14:29,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:14:29,877 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:14:29,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 13:14:29,964 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 13:14:29,964 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:14:29,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 13:14:29,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:14:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 13:14:30,009 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:14:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 13:14:30,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576377207] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:14:30,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:14:30,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2024-12-02 13:14:30,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566577064] [2024-12-02 13:14:30,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:14:30,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 13:14:30,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:30,136 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 13:14:30,137 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-12-02 13:14:30,137 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-12-02 13:14:30,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 291 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:14:30,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:30,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-12-02 13:14:30,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:14:30,575 INFO L124 PetriNetUnfolderBase]: 1850/3503 cut-off events. [2024-12-02 13:14:30,576 INFO L125 PetriNetUnfolderBase]: For 2556/2556 co-relation queries the response was YES. [2024-12-02 13:14:30,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8575 conditions, 3503 events. 1850/3503 cut-off events. For 2556/2556 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 20960 event pairs, 670 based on Foata normal form. 40/3319 useless extension candidates. Maximal degree in co-relation 7725. Up to 1434 conditions per place. [2024-12-02 13:14:30,585 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 73 selfloop transitions, 22 changer transitions 0/101 dead transitions. [2024-12-02 13:14:30,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 101 transitions, 693 flow [2024-12-02 13:14:30,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 13:14:30,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 13:14:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-12-02 13:14:30,587 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5406976744186046 [2024-12-02 13:14:30,587 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 291 flow. Second operand 4 states and 93 transitions. [2024-12-02 13:14:30,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 101 transitions, 693 flow [2024-12-02 13:14:30,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 101 transitions, 650 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-12-02 13:14:30,598 INFO L231 Difference]: Finished difference. Result has 61 places, 76 transitions, 497 flow [2024-12-02 13:14:30,598 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=497, PETRI_PLACES=61, PETRI_TRANSITIONS=76} [2024-12-02 13:14:30,598 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2024-12-02 13:14:30,599 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 76 transitions, 497 flow [2024-12-02 13:14:30,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:14:30,599 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:30,599 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:14:30,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 13:14:30,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:14:30,800 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:14:30,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:30,800 INFO L85 PathProgramCache]: Analyzing trace with hash 880675777, now seen corresponding path program 4 times [2024-12-02 13:14:30,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:30,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240752808] [2024-12-02 13:14:30,801 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 13:14:30,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:30,835 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 13:14:30,835 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:14:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-12-02 13:14:30,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:30,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240752808] [2024-12-02 13:14:30,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240752808] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:14:30,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:14:30,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 13:14:30,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2152177] [2024-12-02 13:14:30,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:14:30,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 13:14:30,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:30,976 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 13:14:30,976 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 13:14:30,980 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-12-02 13:14:30,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 76 transitions, 497 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 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) [2024-12-02 13:14:30,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:30,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-12-02 13:14:30,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:14:31,436 INFO L124 PetriNetUnfolderBase]: 2594/4508 cut-off events. [2024-12-02 13:14:31,436 INFO L125 PetriNetUnfolderBase]: For 4210/4210 co-relation queries the response was YES. [2024-12-02 13:14:31,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11945 conditions, 4508 events. 2594/4508 cut-off events. For 4210/4210 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 24453 event pairs, 530 based on Foata normal form. 242/4408 useless extension candidates. Maximal degree in co-relation 11887. Up to 2229 conditions per place. [2024-12-02 13:14:31,449 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 80 selfloop transitions, 4 changer transitions 4/90 dead transitions. [2024-12-02 13:14:31,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 90 transitions, 747 flow [2024-12-02 13:14:31,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 13:14:31,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 13:14:31,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-12-02 13:14:31,450 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-12-02 13:14:31,450 INFO L175 Difference]: Start difference. First operand has 61 places, 76 transitions, 497 flow. Second operand 4 states and 76 transitions. [2024-12-02 13:14:31,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 90 transitions, 747 flow [2024-12-02 13:14:31,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 90 transitions, 733 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-12-02 13:14:31,457 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 395 flow [2024-12-02 13:14:31,457 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=395, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-12-02 13:14:31,457 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 22 predicate places. [2024-12-02 13:14:31,457 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 395 flow [2024-12-02 13:14:31,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 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) [2024-12-02 13:14:31,458 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:31,458 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:14:31,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-12-02 13:14:31,458 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:14:31,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:31,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1610612813, now seen corresponding path program 1 times [2024-12-02 13:14:31,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:31,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174902177] [2024-12-02 13:14:31,459 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:14:31,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:14:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 13:14:32,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:32,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174902177] [2024-12-02 13:14:32,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174902177] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:14:32,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712691667] [2024-12-02 13:14:32,471 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:14:32,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:14:32,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:14:32,473 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:14:32,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 13:14:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:14:32,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-12-02 13:14:32,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:14:32,653 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 [2024-12-02 13:14:32,970 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-12-02 13:14:32,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 17 [2024-12-02 13:14:32,982 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 13:14:32,982 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:14:33,785 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 [2024-12-02 13:14:33,824 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2024-12-02 13:14:33,824 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 [2024-12-02 13:14:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 13:14:34,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712691667] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:14:34,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:14:34,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2024-12-02 13:14:34,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838714382] [2024-12-02 13:14:34,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:14:34,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-12-02 13:14:34,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:34,663 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-12-02 13:14:34,664 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2024-12-02 13:14:34,789 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-12-02 13:14:34,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 395 flow. Second operand has 30 states, 30 states have (on average 12.9) internal successors, (387), 30 states have internal predecessors, (387), 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) [2024-12-02 13:14:34,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:34,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-12-02 13:14:34,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:14:41,066 INFO L124 PetriNetUnfolderBase]: 6638/12739 cut-off events. [2024-12-02 13:14:41,066 INFO L125 PetriNetUnfolderBase]: For 16386/16394 co-relation queries the response was YES. [2024-12-02 13:14:41,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34709 conditions, 12739 events. 6638/12739 cut-off events. For 16386/16394 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 91776 event pairs, 939 based on Foata normal form. 83/11951 useless extension candidates. Maximal degree in co-relation 19942. Up to 2130 conditions per place. [2024-12-02 13:14:41,102 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 444 selfloop transitions, 151 changer transitions 110/712 dead transitions. [2024-12-02 13:14:41,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 712 transitions, 4347 flow [2024-12-02 13:14:41,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-12-02 13:14:41,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2024-12-02 13:14:41,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 1288 transitions. [2024-12-02 13:14:41,107 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49104079298513154 [2024-12-02 13:14:41,107 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 395 flow. Second operand 61 states and 1288 transitions. [2024-12-02 13:14:41,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 712 transitions, 4347 flow [2024-12-02 13:14:41,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 712 transitions, 4341 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-12-02 13:14:41,122 INFO L231 Difference]: Finished difference. Result has 153 places, 204 transitions, 2216 flow [2024-12-02 13:14:41,122 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=2216, PETRI_PLACES=153, PETRI_TRANSITIONS=204} [2024-12-02 13:14:41,122 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-12-02 13:14:41,122 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 204 transitions, 2216 flow [2024-12-02 13:14:41,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 12.9) internal successors, (387), 30 states have internal predecessors, (387), 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) [2024-12-02 13:14:41,123 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:41,123 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:14:41,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 13:14:41,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-12-02 13:14:41,323 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:14:41,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:41,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1535853325, now seen corresponding path program 2 times [2024-12-02 13:14:41,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:41,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812837193] [2024-12-02 13:14:41,324 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:14:41,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:41,356 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:14:41,356 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:14:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 13:14:42,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:42,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812837193] [2024-12-02 13:14:42,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812837193] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:14:42,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040271309] [2024-12-02 13:14:42,709 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:14:42,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:14:42,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:14:42,711 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:14:42,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 13:14:42,797 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:14:42,797 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:14:42,799 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-12-02 13:14:42,801 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:14:43,263 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-12-02 13:14:43,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 17 [2024-12-02 13:14:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 13:14:43,272 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:14:43,736 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 13:14:43,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 102 treesize of output 131 [2024-12-02 13:14:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 13:14:45,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040271309] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:14:45,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:14:45,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2024-12-02 13:14:45,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832253884] [2024-12-02 13:14:45,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:14:45,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-12-02 13:14:45,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:45,580 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-12-02 13:14:45,580 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2024-12-02 13:14:45,646 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-12-02 13:14:45,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 204 transitions, 2216 flow. Second operand has 29 states, 29 states have (on average 13.10344827586207) internal successors, (380), 29 states have internal predecessors, (380), 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) [2024-12-02 13:14:45,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:45,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-12-02 13:14:45,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:14:49,884 INFO L124 PetriNetUnfolderBase]: 10558/20150 cut-off events. [2024-12-02 13:14:49,884 INFO L125 PetriNetUnfolderBase]: For 202046/202046 co-relation queries the response was YES. [2024-12-02 13:14:49,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74840 conditions, 20150 events. 10558/20150 cut-off events. For 202046/202046 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 157302 event pairs, 4344 based on Foata normal form. 65/18857 useless extension candidates. Maximal degree in co-relation 73516. Up to 5491 conditions per place. [2024-12-02 13:14:50,005 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 222 selfloop transitions, 76 changer transitions 156/461 dead transitions. [2024-12-02 13:14:50,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 461 transitions, 4878 flow [2024-12-02 13:14:50,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-12-02 13:14:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-12-02 13:14:50,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 427 transitions. [2024-12-02 13:14:50,007 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-12-02 13:14:50,007 INFO L175 Difference]: Start difference. First operand has 153 places, 204 transitions, 2216 flow. Second operand 21 states and 427 transitions. [2024-12-02 13:14:50,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 461 transitions, 4878 flow [2024-12-02 13:14:50,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 461 transitions, 3850 flow, removed 510 selfloop flow, removed 4 redundant places. [2024-12-02 13:14:50,335 INFO L231 Difference]: Finished difference. Result has 173 places, 216 transitions, 2002 flow [2024-12-02 13:14:50,335 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2002, PETRI_PLACES=173, PETRI_TRANSITIONS=216} [2024-12-02 13:14:50,336 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-12-02 13:14:50,336 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 216 transitions, 2002 flow [2024-12-02 13:14:50,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 13.10344827586207) internal successors, (380), 29 states have internal predecessors, (380), 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) [2024-12-02 13:14:50,336 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:50,336 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:14:50,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 13:14:50,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-12-02 13:14:50,537 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:14:50,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:50,537 INFO L85 PathProgramCache]: Analyzing trace with hash 802414837, now seen corresponding path program 3 times [2024-12-02 13:14:50,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:50,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816661277] [2024-12-02 13:14:50,537 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:14:50,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:50,558 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 13:14:50,558 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:14:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 13:14:50,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:50,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816661277] [2024-12-02 13:14:50,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816661277] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:14:50,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752695204] [2024-12-02 13:14:50,877 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:14:50,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:14:50,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:14:50,879 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:14:50,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 13:14:50,962 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 13:14:50,962 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:14:50,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-12-02 13:14:50,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:14:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 13:14:51,241 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:14:51,440 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 13:14:51,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-12-02 13:14:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 13:14:51,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752695204] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:14:51,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:14:51,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2024-12-02 13:14:51,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828790324] [2024-12-02 13:14:51,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:14:51,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-12-02 13:14:51,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:51,562 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-12-02 13:14:51,562 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2024-12-02 13:14:51,562 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-12-02 13:14:51,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 216 transitions, 2002 flow. Second operand has 16 states, 16 states have (on average 15.0625) internal successors, (241), 16 states have internal predecessors, (241), 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) [2024-12-02 13:14:51,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:51,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-12-02 13:14:51,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:14:53,711 INFO L124 PetriNetUnfolderBase]: 9084/17430 cut-off events. [2024-12-02 13:14:53,711 INFO L125 PetriNetUnfolderBase]: For 203385/203385 co-relation queries the response was YES. [2024-12-02 13:14:53,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64359 conditions, 17430 events. 9084/17430 cut-off events. For 203385/203385 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 133230 event pairs, 3322 based on Foata normal form. 15/16278 useless extension candidates. Maximal degree in co-relation 63820. Up to 8935 conditions per place. [2024-12-02 13:14:53,794 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 244 selfloop transitions, 48 changer transitions 42/341 dead transitions. [2024-12-02 13:14:53,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 341 transitions, 3500 flow [2024-12-02 13:14:53,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 13:14:53,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 13:14:53,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-12-02 13:14:53,796 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-12-02 13:14:53,796 INFO L175 Difference]: Start difference. First operand has 173 places, 216 transitions, 2002 flow. Second operand 11 states and 253 transitions. [2024-12-02 13:14:53,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 341 transitions, 3500 flow [2024-12-02 13:14:54,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 341 transitions, 3267 flow, removed 97 selfloop flow, removed 13 redundant places. [2024-12-02 13:14:54,095 INFO L231 Difference]: Finished difference. Result has 166 places, 224 transitions, 2078 flow [2024-12-02 13:14:54,095 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1827, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2078, PETRI_PLACES=166, PETRI_TRANSITIONS=224} [2024-12-02 13:14:54,096 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-12-02 13:14:54,096 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 224 transitions, 2078 flow [2024-12-02 13:14:54,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 15.0625) internal successors, (241), 16 states have internal predecessors, (241), 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) [2024-12-02 13:14:54,096 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:54,096 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:14:54,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-12-02 13:14:54,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-12-02 13:14:54,297 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:14:54,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:54,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1192951734, now seen corresponding path program 4 times [2024-12-02 13:14:54,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:54,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027264060] [2024-12-02 13:14:54,298 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 13:14:54,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:54,347 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 13:14:54,348 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:14:55,201 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 13:14:55,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:55,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027264060] [2024-12-02 13:14:55,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027264060] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:14:55,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379551414] [2024-12-02 13:14:55,202 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 13:14:55,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:14:55,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:14:55,203 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:14:55,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 13:14:55,274 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 13:14:55,274 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:14:55,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-12-02 13:14:55,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:14:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 13:14:55,461 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:14:55,639 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 13:14:55,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-12-02 13:14:55,756 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-12-02 13:14:55,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379551414] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:14:55,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:14:55,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 20 [2024-12-02 13:14:55,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762269253] [2024-12-02 13:14:55,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:14:55,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-12-02 13:14:55,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:55,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-12-02 13:14:55,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2024-12-02 13:14:55,780 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-12-02 13:14:55,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 224 transitions, 2078 flow. Second operand has 21 states, 21 states have (on average 14.285714285714286) internal successors, (300), 21 states have internal predecessors, (300), 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) [2024-12-02 13:14:55,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:55,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-12-02 13:14:55,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:14:58,442 INFO L124 PetriNetUnfolderBase]: 9336/17926 cut-off events. [2024-12-02 13:14:58,442 INFO L125 PetriNetUnfolderBase]: For 156865/156865 co-relation queries the response was YES. [2024-12-02 13:14:58,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63698 conditions, 17926 events. 9336/17926 cut-off events. For 156865/156865 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 137607 event pairs, 3905 based on Foata normal form. 2/16721 useless extension candidates. Maximal degree in co-relation 63552. Up to 12649 conditions per place. [2024-12-02 13:14:58,558 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 253 selfloop transitions, 34 changer transitions 44/338 dead transitions. [2024-12-02 13:14:58,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 338 transitions, 3394 flow [2024-12-02 13:14:58,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 13:14:58,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-12-02 13:14:58,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 307 transitions. [2024-12-02 13:14:58,559 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.475968992248062 [2024-12-02 13:14:58,559 INFO L175 Difference]: Start difference. First operand has 166 places, 224 transitions, 2078 flow. Second operand 15 states and 307 transitions. [2024-12-02 13:14:58,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 338 transitions, 3394 flow [2024-12-02 13:14:58,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 338 transitions, 3273 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-12-02 13:14:58,816 INFO L231 Difference]: Finished difference. Result has 175 places, 226 transitions, 2081 flow [2024-12-02 13:14:58,817 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1977, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2081, PETRI_PLACES=175, PETRI_TRANSITIONS=226} [2024-12-02 13:14:58,817 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-12-02 13:14:58,817 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 226 transitions, 2081 flow [2024-12-02 13:14:58,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 14.285714285714286) internal successors, (300), 21 states have internal predecessors, (300), 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) [2024-12-02 13:14:58,817 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:58,818 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:14:58,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 13:14:59,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-12-02 13:14:59,018 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:14:59,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:59,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1300244017, now seen corresponding path program 5 times [2024-12-02 13:14:59,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:59,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522748164] [2024-12-02 13:14:59,019 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 13:14:59,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:59,038 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-12-02 13:14:59,038 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:14:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-12-02 13:14:59,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:59,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522748164] [2024-12-02 13:14:59,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522748164] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:14:59,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866151066] [2024-12-02 13:14:59,102 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 13:14:59,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:14:59,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:14:59,104 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:14:59,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 13:14:59,208 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-12-02 13:14:59,208 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:14:59,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 13:14:59,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:14:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-12-02 13:14:59,260 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:14:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-12-02 13:14:59,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866151066] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:14:59,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:14:59,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2024-12-02 13:14:59,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266362351] [2024-12-02 13:14:59,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:14:59,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 13:14:59,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:59,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 13:14:59,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-12-02 13:14:59,409 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-12-02 13:14:59,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 226 transitions, 2081 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 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) [2024-12-02 13:14:59,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:59,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-12-02 13:14:59,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:15:02,540 INFO L124 PetriNetUnfolderBase]: 11130/21526 cut-off events. [2024-12-02 13:15:02,541 INFO L125 PetriNetUnfolderBase]: For 179205/179205 co-relation queries the response was YES. [2024-12-02 13:15:02,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75882 conditions, 21526 events. 11130/21526 cut-off events. For 179205/179205 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 168420 event pairs, 3352 based on Foata normal form. 62/20154 useless extension candidates. Maximal degree in co-relation 75218. Up to 9565 conditions per place. [2024-12-02 13:15:02,668 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 181 selfloop transitions, 118 changer transitions 0/306 dead transitions. [2024-12-02 13:15:02,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 306 transitions, 3384 flow [2024-12-02 13:15:02,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:15:02,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:15:02,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-12-02 13:15:02,669 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5488372093023256 [2024-12-02 13:15:02,669 INFO L175 Difference]: Start difference. First operand has 175 places, 226 transitions, 2081 flow. Second operand 5 states and 118 transitions. [2024-12-02 13:15:02,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 306 transitions, 3384 flow [2024-12-02 13:15:02,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 306 transitions, 3271 flow, removed 23 selfloop flow, removed 13 redundant places. [2024-12-02 13:15:02,969 INFO L231 Difference]: Finished difference. Result has 167 places, 263 transitions, 2889 flow [2024-12-02 13:15:02,969 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1965, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2889, PETRI_PLACES=167, PETRI_TRANSITIONS=263} [2024-12-02 13:15:02,970 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-12-02 13:15:02,970 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 263 transitions, 2889 flow [2024-12-02 13:15:02,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 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) [2024-12-02 13:15:02,970 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:15:02,970 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:15:02,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 13:15:03,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-12-02 13:15:03,171 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:15:03,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:15:03,172 INFO L85 PathProgramCache]: Analyzing trace with hash 667395480, now seen corresponding path program 6 times [2024-12-02 13:15:03,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:15:03,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729925705] [2024-12-02 13:15:03,172 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 13:15:03,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:15:03,220 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-12-02 13:15:03,220 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:15:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 13:15:04,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:15:04,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729925705] [2024-12-02 13:15:04,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729925705] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:15:04,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337833473] [2024-12-02 13:15:04,500 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 13:15:04,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:15:04,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:15:04,502 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:15:04,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 13:15:04,582 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-12-02 13:15:04,582 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:15:04,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-12-02 13:15:04,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:15:04,698 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 [2024-12-02 13:15:05,525 INFO L349 Elim1Store]: treesize reduction 99, result has 9.2 percent of original size [2024-12-02 13:15:05,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 27 [2024-12-02 13:15:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 13:15:05,538 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:15:07,994 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 206 treesize of output 188 [2024-12-02 13:15:08,167 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 13:15:08,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 534 treesize of output 590 [2024-12-02 13:17:36,878 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:17:38,191 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:17:38,697 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:17:42,409 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:17:43,578 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:17:45,009 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:17:45,394 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:17:46,467 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:17:47,455 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:17:48,970 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:17:50,436 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:17:52,576 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:17:55,021 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:17:57,395 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:17:58,545 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:18:00,284 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:18:01,346 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:18:03,930 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:18:04,785 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:18:13,678 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:18:17,470 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:18:26,243 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:18:27,410 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:18:31,281 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:18:36,639 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:18:40,467 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:18:45,466 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:18:52,187 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:18:53,560 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:18:55,068 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:18:56,772 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:18:57,650 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:18:58,720 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:18:59,108 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:19:01,383 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:19:01,985 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:19:03,582 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:19:08,800 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:19:10,038 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:19:11,643 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:19:13,311 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:19:19,020 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:19:20,596 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:19:21,244 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:19:22,271 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:19:23,437 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:19:24,339 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:19:25,958 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 13:22:52,112 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-12-02 13:22:52,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2024-12-02 13:22:52,112 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-12-02 13:22:52,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 13:22:52,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:22:52,314 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:275) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:499) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:484) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:590) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:395) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:267) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:325) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 69 more [2024-12-02 13:22:52,319 INFO L158 Benchmark]: Toolchain (without parser) took 511618.77ms. Allocated memory was 142.6MB in the beginning and 3.1GB in the end (delta: 3.0GB). Free memory was 117.5MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 2.4GB. Max. memory is 16.1GB. [2024-12-02 13:22:52,319 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 142.6MB. Free memory is still 82.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 13:22:52,320 INFO L158 Benchmark]: CACSL2BoogieTranslator took 184.86ms. Allocated memory is still 142.6MB. Free memory was 117.3MB in the beginning and 105.4MB in the end (delta: 11.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-02 13:22:52,320 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.40ms. Allocated memory is still 142.6MB. Free memory was 105.4MB in the beginning and 103.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 13:22:52,320 INFO L158 Benchmark]: Boogie Preprocessor took 31.28ms. Allocated memory is still 142.6MB. Free memory was 103.9MB in the beginning and 102.1MB in the end (delta: 1.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-02 13:22:52,321 INFO L158 Benchmark]: RCFGBuilder took 560.55ms. Allocated memory is still 142.6MB. Free memory was 101.9MB in the beginning and 62.2MB in the end (delta: 39.7MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2024-12-02 13:22:52,321 INFO L158 Benchmark]: TraceAbstraction took 510806.69ms. Allocated memory was 142.6MB in the beginning and 3.1GB in the end (delta: 3.0GB). Free memory was 61.5MB in the beginning and 1.1GB in the end (delta: -1.1GB). Peak memory consumption was 2.4GB. Max. memory is 16.1GB. [2024-12-02 13:22:52,322 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 142.6MB. Free memory is still 82.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 184.86ms. Allocated memory is still 142.6MB. Free memory was 117.3MB in the beginning and 105.4MB in the end (delta: 11.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.40ms. Allocated memory is still 142.6MB. Free memory was 105.4MB in the beginning and 103.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 31.28ms. Allocated memory is still 142.6MB. Free memory was 103.9MB in the beginning and 102.1MB in the end (delta: 1.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 560.55ms. Allocated memory is still 142.6MB. Free memory was 101.9MB in the beginning and 62.2MB in the end (delta: 39.7MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * TraceAbstraction took 510806.69ms. Allocated memory was 142.6MB in the beginning and 3.1GB in the end (delta: 3.0GB). Free memory was 61.5MB in the beginning and 1.1GB in the end (delta: -1.1GB). Peak memory consumption was 2.4GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1 --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 d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 13:22:54,202 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 13:22:54,280 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-12-02 13:22:54,286 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 13:22:54,286 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 13:22:54,311 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 13:22:54,312 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 13:22:54,312 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 13:22:54,312 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 13:22:54,312 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 13:22:54,312 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 13:22:54,312 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 13:22:54,313 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 13:22:54,313 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 13:22:54,313 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 13:22:54,313 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 13:22:54,313 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 13:22:54,313 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 13:22:54,313 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 13:22:54,313 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 13:22:54,314 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 13:22:54,314 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 13:22:54,314 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 13:22:54,314 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 13:22:54,314 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 13:22:54,314 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-12-02 13:22:54,314 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-12-02 13:22:54,314 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 13:22:54,314 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 13:22:54,314 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 13:22:54,314 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 13:22:54,315 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 13:22:54,315 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 13:22:54,315 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 13:22:54,315 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 13:22:54,315 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:22:54,315 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 13:22:54,315 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 13:22:54,316 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 13:22:54,316 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 13:22:54,316 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:22:54,316 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 13:22:54,316 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 13:22:54,316 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-12-02 13:22:54,316 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-12-02 13:22:54,316 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 13:22:54,316 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 13:22:54,316 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 13:22:54,316 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 13:22:54,316 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_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1 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 -> d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 [2024-12-02 13:22:54,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 13:22:54,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 13:22:54,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 13:22:54,580 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 13:22:54,581 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 13:22:54,582 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-12-02 13:22:57,321 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/data/6f32c4ecf/87d39157b82849fd809c49f8e67de7ea/FLAG363c8ba2b [2024-12-02 13:22:57,501 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 13:22:57,502 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-12-02 13:22:57,508 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/data/6f32c4ecf/87d39157b82849fd809c49f8e67de7ea/FLAG363c8ba2b [2024-12-02 13:22:57,868 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/data/6f32c4ecf/87d39157b82849fd809c49f8e67de7ea [2024-12-02 13:22:57,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 13:22:57,871 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 13:22:57,872 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 13:22:57,872 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 13:22:57,875 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 13:22:57,875 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:22:57" (1/1) ... [2024-12-02 13:22:57,876 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f75c0f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:57, skipping insertion in model container [2024-12-02 13:22:57,876 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:22:57" (1/1) ... [2024-12-02 13:22:57,886 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 13:22:58,011 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-02 13:22:58,014 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 13:22:58,026 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 13:22:58,049 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 13:22:58,065 INFO L204 MainTranslator]: Completed translation [2024-12-02 13:22:58,065 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:58 WrapperNode [2024-12-02 13:22:58,065 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 13:22:58,066 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 13:22:58,066 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 13:22:58,067 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 13:22:58,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:58" (1/1) ... [2024-12-02 13:22:58,081 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:58" (1/1) ... [2024-12-02 13:22:58,100 INFO L138 Inliner]: procedures = 25, calls = 28, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 135 [2024-12-02 13:22:58,101 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 13:22:58,101 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 13:22:58,101 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 13:22:58,101 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 13:22:58,111 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:58" (1/1) ... [2024-12-02 13:22:58,111 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:58" (1/1) ... [2024-12-02 13:22:58,114 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:58" (1/1) ... [2024-12-02 13:22:58,127 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]. [2024-12-02 13:22:58,127 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:58" (1/1) ... [2024-12-02 13:22:58,127 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:58" (1/1) ... [2024-12-02 13:22:58,133 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:58" (1/1) ... [2024-12-02 13:22:58,134 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:58" (1/1) ... [2024-12-02 13:22:58,136 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:58" (1/1) ... [2024-12-02 13:22:58,137 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:58" (1/1) ... [2024-12-02 13:22:58,138 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:58" (1/1) ... [2024-12-02 13:22:58,141 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 13:22:58,142 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 13:22:58,142 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 13:22:58,142 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 13:22:58,143 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:58" (1/1) ... [2024-12-02 13:22:58,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:22:58,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:22:58,173 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 13:22:58,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 13:22:58,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 13:22:58,200 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 13:22:58,200 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 13:22:58,200 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 13:22:58,200 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 13:22:58,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-12-02 13:22:58,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-12-02 13:22:58,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-12-02 13:22:58,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-12-02 13:22:58,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 13:22:58,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-12-02 13:22:58,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-12-02 13:22:58,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 13:22:58,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 13:22:58,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-12-02 13:22:58,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-12-02 13:22:58,202 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-12-02 13:22:58,301 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 13:22:58,303 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 13:22:58,607 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 13:22:58,607 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 13:22:58,823 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 13:22:58,823 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-12-02 13:22:58,823 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:22:58 BoogieIcfgContainer [2024-12-02 13:22:58,824 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 13:22:58,826 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 13:22:58,826 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 13:22:58,830 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 13:22:58,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:22:57" (1/3) ... [2024-12-02 13:22:58,831 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a39b64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:22:58, skipping insertion in model container [2024-12-02 13:22:58,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:58" (2/3) ... [2024-12-02 13:22:58,831 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a39b64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:22:58, skipping insertion in model container [2024-12-02 13:22:58,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:22:58" (3/3) ... [2024-12-02 13:22:58,832 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2024-12-02 13:22:58,848 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 13:22:58,849 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-send-receive-alt.wvr.c that has 3 procedures, 38 locations, 1 initial locations, 3 loop locations, and 10 error locations. [2024-12-02 13:22:58,850 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 13:22:58,909 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-12-02 13:22:58,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 43 transitions, 100 flow [2024-12-02 13:22:58,975 INFO L124 PetriNetUnfolderBase]: 6/41 cut-off events. [2024-12-02 13:22:58,977 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-12-02 13:22:58,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 41 events. 6/41 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 72 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-12-02 13:22:58,981 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 43 transitions, 100 flow [2024-12-02 13:22:58,984 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 40 transitions, 92 flow [2024-12-02 13:22:58,990 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 13:22:59,000 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;@2e800e87, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 13:22:59,000 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-12-02 13:22:59,004 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 13:22:59,004 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-12-02 13:22:59,004 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 13:22:59,004 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:22:59,005 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 13:22:59,006 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:22:59,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:22:59,012 INFO L85 PathProgramCache]: Analyzing trace with hash 450737, now seen corresponding path program 1 times [2024-12-02 13:22:59,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:22:59,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081579160] [2024-12-02 13:22:59,023 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:22:59,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:22:59,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:22:59,025 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:22:59,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 13:22:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:22:59,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 13:22:59,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:22:59,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-12-02 13:22:59,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:22:59,153 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:22:59,154 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:22:59,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081579160] [2024-12-02 13:22:59,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081579160] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:22:59,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:22:59,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-12-02 13:22:59,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146871161] [2024-12-02 13:22:59,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:22:59,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 13:22:59,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:22:59,179 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 13:22:59,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 13:22:59,195 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-12-02 13:22:59,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-12-02 13:22:59,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:22:59,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-12-02 13:22:59,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:22:59,451 INFO L124 PetriNetUnfolderBase]: 308/550 cut-off events. [2024-12-02 13:22:59,451 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-12-02 13:22:59,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 550 events. 308/550 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2434 event pairs, 250 based on Foata normal form. 1/376 useless extension candidates. Maximal degree in co-relation 1005. Up to 497 conditions per place. [2024-12-02 13:22:59,458 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-12-02 13:22:59,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 140 flow [2024-12-02 13:22:59,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 13:22:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 13:22:59,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-12-02 13:22:59,472 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-12-02 13:22:59,473 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 92 flow. Second operand 3 states and 60 transitions. [2024-12-02 13:22:59,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 140 flow [2024-12-02 13:22:59,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 132 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-02 13:22:59,481 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 78 flow [2024-12-02 13:22:59,483 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2024-12-02 13:22:59,486 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -5 predicate places. [2024-12-02 13:22:59,487 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 78 flow [2024-12-02 13:22:59,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-12-02 13:22:59,487 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:22:59,487 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 13:22:59,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 13:22:59,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:22:59,688 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:22:59,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:22:59,688 INFO L85 PathProgramCache]: Analyzing trace with hash 450738, now seen corresponding path program 1 times [2024-12-02 13:22:59,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:22:59,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674952581] [2024-12-02 13:22:59,689 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:22:59,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:22:59,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:22:59,691 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:22:59,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 13:22:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:22:59,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 13:22:59,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:22:59,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-12-02 13:22:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:22:59,868 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:22:59,868 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:22:59,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674952581] [2024-12-02 13:22:59,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674952581] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:22:59,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:22:59,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 13:22:59,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110036580] [2024-12-02 13:22:59,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:22:59,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 13:22:59,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:22:59,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 13:22:59,871 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 13:22:59,879 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-12-02 13:22:59,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2024-12-02 13:22:59,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:22:59,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-12-02 13:22:59,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:23:00,179 INFO L124 PetriNetUnfolderBase]: 309/553 cut-off events. [2024-12-02 13:23:00,179 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-12-02 13:23:00,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1071 conditions, 553 events. 309/553 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2446 event pairs, 250 based on Foata normal form. 0/378 useless extension candidates. Maximal degree in co-relation 1049. Up to 502 conditions per place. [2024-12-02 13:23:00,191 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 29 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2024-12-02 13:23:00,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 152 flow [2024-12-02 13:23:00,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 13:23:00,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 13:23:00,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-12-02 13:23:00,193 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-12-02 13:23:00,193 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 78 flow. Second operand 4 states and 70 transitions. [2024-12-02 13:23:00,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 152 flow [2024-12-02 13:23:00,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 13:23:00,195 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 101 flow [2024-12-02 13:23:00,196 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2024-12-02 13:23:00,196 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2024-12-02 13:23:00,197 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 101 flow [2024-12-02 13:23:00,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2024-12-02 13:23:00,197 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:23:00,197 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-12-02 13:23:00,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 13:23:00,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:00,398 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:23:00,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:23:00,398 INFO L85 PathProgramCache]: Analyzing trace with hash 433173662, now seen corresponding path program 1 times [2024-12-02 13:23:00,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:23:00,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58899769] [2024-12-02 13:23:00,399 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:23:00,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:00,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:23:00,400 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:23:00,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 13:23:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:23:00,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 13:23:00,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:23:00,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-12-02 13:23:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:23:00,609 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:23:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:23:00,846 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:23:00,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58899769] [2024-12-02 13:23:00,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58899769] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:23:00,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:23:00,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-12-02 13:23:00,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043674786] [2024-12-02 13:23:00,847 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 13:23:00,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 13:23:00,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:23:00,848 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 13:23:00,848 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-12-02 13:23:00,889 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-12-02 13:23:00,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 101 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:23:00,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:23:00,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-12-02 13:23:00,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:23:01,622 INFO L124 PetriNetUnfolderBase]: 312/562 cut-off events. [2024-12-02 13:23:01,623 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-12-02 13:23:01,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1108 conditions, 562 events. 312/562 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2494 event pairs, 250 based on Foata normal form. 0/383 useless extension candidates. Maximal degree in co-relation 1056. Up to 505 conditions per place. [2024-12-02 13:23:01,627 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 29 selfloop transitions, 13 changer transitions 0/47 dead transitions. [2024-12-02 13:23:01,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 221 flow [2024-12-02 13:23:01,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 13:23:01,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-12-02 13:23:01,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2024-12-02 13:23:01,629 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.313953488372093 [2024-12-02 13:23:01,630 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 101 flow. Second operand 10 states and 135 transitions. [2024-12-02 13:23:01,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 221 flow [2024-12-02 13:23:01,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 13:23:01,632 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 178 flow [2024-12-02 13:23:01,632 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=178, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2024-12-02 13:23:01,633 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-12-02 13:23:01,633 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 178 flow [2024-12-02 13:23:01,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:23:01,633 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:23:01,634 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:23:01,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 13:23:01,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:01,834 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:23:01,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:23:01,835 INFO L85 PathProgramCache]: Analyzing trace with hash -253188019, now seen corresponding path program 1 times [2024-12-02 13:23:01,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:23:01,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300711259] [2024-12-02 13:23:01,835 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:23:01,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:01,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:23:01,837 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:23:01,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 13:23:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:23:01,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 13:23:01,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:23:01,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:23:01,947 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:23:01,947 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:23:01,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300711259] [2024-12-02 13:23:01,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300711259] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:23:01,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:23:01,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 13:23:01,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349335339] [2024-12-02 13:23:01,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:23:01,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 13:23:01,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:23:01,948 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 13:23:01,948 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 13:23:01,959 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-12-02 13:23:01,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2024-12-02 13:23:01,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:23:01,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-12-02 13:23:01,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:23:02,160 INFO L124 PetriNetUnfolderBase]: 379/699 cut-off events. [2024-12-02 13:23:02,160 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-12-02 13:23:02,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1408 conditions, 699 events. 379/699 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3230 event pairs, 318 based on Foata normal form. 12/524 useless extension candidates. Maximal degree in co-relation 1374. Up to 509 conditions per place. [2024-12-02 13:23:02,164 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 52 selfloop transitions, 3 changer transitions 1/62 dead transitions. [2024-12-02 13:23:02,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 62 transitions, 324 flow [2024-12-02 13:23:02,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 13:23:02,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 13:23:02,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-12-02 13:23:02,165 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5290697674418605 [2024-12-02 13:23:02,166 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 178 flow. Second operand 4 states and 91 transitions. [2024-12-02 13:23:02,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 62 transitions, 324 flow [2024-12-02 13:23:02,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 62 transitions, 294 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-12-02 13:23:02,168 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 163 flow [2024-12-02 13:23:02,168 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2024-12-02 13:23:02,169 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-12-02 13:23:02,169 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 163 flow [2024-12-02 13:23:02,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2024-12-02 13:23:02,169 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:23:02,169 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:23:02,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 13:23:02,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:02,370 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:23:02,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:23:02,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1072716231, now seen corresponding path program 1 times [2024-12-02 13:23:02,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:23:02,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [584495476] [2024-12-02 13:23:02,371 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:23:02,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:02,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:23:02,372 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:23:02,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 13:23:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:23:02,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-12-02 13:23:02,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:23:02,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-12-02 13:23:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:23:02,689 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:23:03,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:23:03,337 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:23:03,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584495476] [2024-12-02 13:23:03,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584495476] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:23:03,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:23:03,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-12-02 13:23:03,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196015510] [2024-12-02 13:23:03,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 13:23:03,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 13:23:03,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:23:03,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 13:23:03,339 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-12-02 13:23:03,719 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-12-02 13:23:03,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 163 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 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) [2024-12-02 13:23:03,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:23:03,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-12-02 13:23:03,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:23:05,099 INFO L124 PetriNetUnfolderBase]: 917/1659 cut-off events. [2024-12-02 13:23:05,099 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2024-12-02 13:23:05,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3461 conditions, 1659 events. 917/1659 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8789 event pairs, 752 based on Foata normal form. 0/1245 useless extension candidates. Maximal degree in co-relation 3158. Up to 499 conditions per place. [2024-12-02 13:23:05,117 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 92 selfloop transitions, 12 changer transitions 1/110 dead transitions. [2024-12-02 13:23:05,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 110 transitions, 523 flow [2024-12-02 13:23:05,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 13:23:05,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-12-02 13:23:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-12-02 13:23:05,120 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-12-02 13:23:05,120 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 163 flow. Second operand 10 states and 196 transitions. [2024-12-02 13:23:05,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 110 transitions, 523 flow [2024-12-02 13:23:05,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 110 transitions, 518 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 13:23:05,123 INFO L231 Difference]: Finished difference. Result has 60 places, 47 transitions, 189 flow [2024-12-02 13:23:05,123 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=189, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2024-12-02 13:23:05,124 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-12-02 13:23:05,124 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 189 flow [2024-12-02 13:23:05,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 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) [2024-12-02 13:23:05,124 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:23:05,124 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:23:05,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 13:23:05,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:05,325 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:23:05,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:23:05,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1072716232, now seen corresponding path program 1 times [2024-12-02 13:23:05,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:23:05,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237664446] [2024-12-02 13:23:05,326 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:23:05,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:05,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:23:05,327 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:23:05,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 13:23:05,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:23:05,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 13:23:05,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:23:05,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-12-02 13:23:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:23:05,403 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:23:05,403 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:23:05,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237664446] [2024-12-02 13:23:05,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237664446] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:23:05,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:23:05,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 13:23:05,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888654653] [2024-12-02 13:23:05,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:23:05,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 13:23:05,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:23:05,404 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 13:23:05,404 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 13:23:05,417 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-12-02 13:23:05,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 47 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2024-12-02 13:23:05,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:23:05,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-12-02 13:23:05,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:23:05,591 INFO L124 PetriNetUnfolderBase]: 684/1256 cut-off events. [2024-12-02 13:23:05,592 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2024-12-02 13:23:05,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2633 conditions, 1256 events. 684/1256 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 6214 event pairs, 545 based on Foata normal form. 0/1056 useless extension candidates. Maximal degree in co-relation 2316. Up to 1128 conditions per place. [2024-12-02 13:23:05,598 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 32 selfloop transitions, 6 changer transitions 0/44 dead transitions. [2024-12-02 13:23:05,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 44 transitions, 257 flow [2024-12-02 13:23:05,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 13:23:05,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 13:23:05,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-12-02 13:23:05,599 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-12-02 13:23:05,599 INFO L175 Difference]: Start difference. First operand has 60 places, 47 transitions, 189 flow. Second operand 4 states and 65 transitions. [2024-12-02 13:23:05,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 44 transitions, 257 flow [2024-12-02 13:23:05,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 44 transitions, 246 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-02 13:23:05,602 INFO L231 Difference]: Finished difference. Result has 56 places, 44 transitions, 182 flow [2024-12-02 13:23:05,602 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=56, PETRI_TRANSITIONS=44} [2024-12-02 13:23:05,603 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 15 predicate places. [2024-12-02 13:23:05,603 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 44 transitions, 182 flow [2024-12-02 13:23:05,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2024-12-02 13:23:05,603 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:23:05,604 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-12-02 13:23:05,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 13:23:05,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:05,804 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:23:05,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:23:05,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1555918434, now seen corresponding path program 2 times [2024-12-02 13:23:05,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:23:05,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058170806] [2024-12-02 13:23:05,805 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:23:05,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:05,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:23:05,806 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:23:05,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 13:23:05,876 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:23:05,876 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:23:05,878 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 13:23:05,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:23:05,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-12-02 13:23:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:23:06,168 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:23:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:23:06,876 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:23:06,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058170806] [2024-12-02 13:23:06,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058170806] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:23:06,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:23:06,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-12-02 13:23:06,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25400190] [2024-12-02 13:23:06,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 13:23:06,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 13:23:06,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:23:06,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 13:23:06,877 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-12-02 13:23:07,046 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-12-02 13:23:07,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 182 flow. Second operand has 14 states, 14 states have (on average 10.571428571428571) internal successors, (148), 14 states have internal predecessors, (148), 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) [2024-12-02 13:23:07,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:23:07,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-12-02 13:23:07,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:23:09,810 INFO L124 PetriNetUnfolderBase]: 690/1274 cut-off events. [2024-12-02 13:23:09,810 INFO L125 PetriNetUnfolderBase]: For 206/206 co-relation queries the response was YES. [2024-12-02 13:23:09,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2715 conditions, 1274 events. 690/1274 cut-off events. For 206/206 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 6433 event pairs, 545 based on Foata normal form. 6/1086 useless extension candidates. Maximal degree in co-relation 2319. Up to 1139 conditions per place. [2024-12-02 13:23:09,815 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 26 selfloop transitions, 31 changer transitions 0/62 dead transitions. [2024-12-02 13:23:09,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 62 transitions, 416 flow [2024-12-02 13:23:09,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-12-02 13:23:09,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-12-02 13:23:09,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 261 transitions. [2024-12-02 13:23:09,818 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2758985200845666 [2024-12-02 13:23:09,818 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 182 flow. Second operand 22 states and 261 transitions. [2024-12-02 13:23:09,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 62 transitions, 416 flow [2024-12-02 13:23:09,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 62 transitions, 403 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 13:23:09,822 INFO L231 Difference]: Finished difference. Result has 81 places, 62 transitions, 381 flow [2024-12-02 13:23:09,822 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=381, PETRI_PLACES=81, PETRI_TRANSITIONS=62} [2024-12-02 13:23:09,822 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-12-02 13:23:09,822 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 62 transitions, 381 flow [2024-12-02 13:23:09,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.571428571428571) internal successors, (148), 14 states have internal predecessors, (148), 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) [2024-12-02 13:23:09,823 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:23:09,823 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:23:09,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 13:23:10,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:10,023 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:23:10,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:23:10,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1338555344, now seen corresponding path program 1 times [2024-12-02 13:23:10,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:23:10,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313533049] [2024-12-02 13:23:10,024 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:23:10,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:10,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:23:10,026 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:23:10,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 13:23:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:23:10,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-12-02 13:23:10,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:23:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:23:10,087 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:23:10,087 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:23:10,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313533049] [2024-12-02 13:23:10,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313533049] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:23:10,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:23:10,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 13:23:10,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278212248] [2024-12-02 13:23:10,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:23:10,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 13:23:10,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:23:10,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 13:23:10,088 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 13:23:10,093 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-12-02 13:23:10,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 62 transitions, 381 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-12-02 13:23:10,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:23:10,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-12-02 13:23:10,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:23:10,364 INFO L124 PetriNetUnfolderBase]: 1175/2104 cut-off events. [2024-12-02 13:23:10,364 INFO L125 PetriNetUnfolderBase]: For 358/358 co-relation queries the response was YES. [2024-12-02 13:23:10,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4587 conditions, 2104 events. 1175/2104 cut-off events. For 358/358 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 11106 event pairs, 543 based on Foata normal form. 41/1898 useless extension candidates. Maximal degree in co-relation 4530. Up to 1198 conditions per place. [2024-12-02 13:23:10,370 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 73 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2024-12-02 13:23:10,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 79 transitions, 577 flow [2024-12-02 13:23:10,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 13:23:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 13:23:10,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-12-02 13:23:10,371 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5426356589147286 [2024-12-02 13:23:10,371 INFO L175 Difference]: Start difference. First operand has 81 places, 62 transitions, 381 flow. Second operand 3 states and 70 transitions. [2024-12-02 13:23:10,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 79 transitions, 577 flow [2024-12-02 13:23:10,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 79 transitions, 497 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-12-02 13:23:10,374 INFO L231 Difference]: Finished difference. Result has 75 places, 63 transitions, 313 flow [2024-12-02 13:23:10,374 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=313, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2024-12-02 13:23:10,375 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2024-12-02 13:23:10,375 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 313 flow [2024-12-02 13:23:10,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-12-02 13:23:10,375 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:23:10,375 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:23:10,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-12-02 13:23:10,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:10,576 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:23:10,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:23:10,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1338555310, now seen corresponding path program 1 times [2024-12-02 13:23:10,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:23:10,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370135040] [2024-12-02 13:23:10,576 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:23:10,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:10,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:23:10,578 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:23:10,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 13:23:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:23:10,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-12-02 13:23:10,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:23:10,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-12-02 13:23:10,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:23:10,962 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:23:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:23:11,634 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:23:11,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370135040] [2024-12-02 13:23:11,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370135040] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:23:11,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:23:11,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-12-02 13:23:11,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762469158] [2024-12-02 13:23:11,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 13:23:11,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 13:23:11,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:23:11,636 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 13:23:11,636 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-12-02 13:23:11,891 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-12-02 13:23:11,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 63 transitions, 313 flow. Second operand has 12 states, 12 states have (on average 10.833333333333334) internal successors, (130), 12 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:23:11,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:23:11,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-12-02 13:23:11,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:23:13,762 INFO L124 PetriNetUnfolderBase]: 934/1781 cut-off events. [2024-12-02 13:23:13,762 INFO L125 PetriNetUnfolderBase]: For 460/460 co-relation queries the response was YES. [2024-12-02 13:23:13,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3953 conditions, 1781 events. 934/1781 cut-off events. For 460/460 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 9453 event pairs, 699 based on Foata normal form. 4/1642 useless extension candidates. Maximal degree in co-relation 3900. Up to 602 conditions per place. [2024-12-02 13:23:13,767 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 92 selfloop transitions, 30 changer transitions 1/129 dead transitions. [2024-12-02 13:23:13,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 129 transitions, 724 flow [2024-12-02 13:23:13,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 13:23:13,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-12-02 13:23:13,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 217 transitions. [2024-12-02 13:23:13,769 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42054263565891475 [2024-12-02 13:23:13,769 INFO L175 Difference]: Start difference. First operand has 75 places, 63 transitions, 313 flow. Second operand 12 states and 217 transitions. [2024-12-02 13:23:13,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 129 transitions, 724 flow [2024-12-02 13:23:13,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 129 transitions, 719 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 13:23:13,774 INFO L231 Difference]: Finished difference. Result has 87 places, 69 transitions, 409 flow [2024-12-02 13:23:13,774 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=409, PETRI_PLACES=87, PETRI_TRANSITIONS=69} [2024-12-02 13:23:13,775 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 46 predicate places. [2024-12-02 13:23:13,775 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 69 transitions, 409 flow [2024-12-02 13:23:13,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.833333333333334) internal successors, (130), 12 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:23:13,775 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:23:13,775 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:23:13,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 13:23:13,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:13,976 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:23:13,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:23:13,976 INFO L85 PathProgramCache]: Analyzing trace with hash -817832451, now seen corresponding path program 2 times [2024-12-02 13:23:13,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:23:13,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515584423] [2024-12-02 13:23:13,976 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:23:13,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:13,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:23:13,978 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:23:13,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 13:23:14,031 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 13:23:14,031 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:23:14,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 13:23:14,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:23:14,105 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-12-02 13:23:14,106 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:23:14,106 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:23:14,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515584423] [2024-12-02 13:23:14,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515584423] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:23:14,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:23:14,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-12-02 13:23:14,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265182173] [2024-12-02 13:23:14,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:23:14,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 13:23:14,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:23:14,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 13:23:14,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 13:23:14,107 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-12-02 13:23:14,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 69 transitions, 409 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2024-12-02 13:23:14,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:23:14,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-12-02 13:23:14,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:23:14,315 INFO L124 PetriNetUnfolderBase]: 808/1587 cut-off events. [2024-12-02 13:23:14,315 INFO L125 PetriNetUnfolderBase]: For 872/872 co-relation queries the response was YES. [2024-12-02 13:23:14,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3834 conditions, 1587 events. 808/1587 cut-off events. For 872/872 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 8478 event pairs, 374 based on Foata normal form. 58/1544 useless extension candidates. Maximal degree in co-relation 3776. Up to 722 conditions per place. [2024-12-02 13:23:14,324 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 76 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2024-12-02 13:23:14,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 87 transitions, 633 flow [2024-12-02 13:23:14,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 13:23:14,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 13:23:14,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-12-02 13:23:14,325 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-12-02 13:23:14,325 INFO L175 Difference]: Start difference. First operand has 87 places, 69 transitions, 409 flow. Second operand 3 states and 72 transitions. [2024-12-02 13:23:14,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 87 transitions, 633 flow [2024-12-02 13:23:14,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 87 transitions, 589 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-02 13:23:14,331 INFO L231 Difference]: Finished difference. Result has 84 places, 72 transitions, 401 flow [2024-12-02 13:23:14,331 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=401, PETRI_PLACES=84, PETRI_TRANSITIONS=72} [2024-12-02 13:23:14,332 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-12-02 13:23:14,332 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 72 transitions, 401 flow [2024-12-02 13:23:14,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2024-12-02 13:23:14,332 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:23:14,332 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:23:14,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 13:23:14,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:14,533 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:23:14,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:23:14,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1736479977, now seen corresponding path program 1 times [2024-12-02 13:23:14,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:23:14,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263345027] [2024-12-02 13:23:14,533 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:23:14,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:14,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:23:14,535 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:23:14,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 13:23:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:23:14,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-12-02 13:23:14,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:23:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:23:14,612 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:23:14,612 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:23:14,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263345027] [2024-12-02 13:23:14,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263345027] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:23:14,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:23:14,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 13:23:14,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740398834] [2024-12-02 13:23:14,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:23:14,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 13:23:14,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:23:14,613 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 13:23:14,613 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 13:23:14,613 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-12-02 13:23:14,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 72 transitions, 401 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2024-12-02 13:23:14,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:23:14,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-12-02 13:23:14,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:23:14,866 INFO L124 PetriNetUnfolderBase]: 1085/2052 cut-off events. [2024-12-02 13:23:14,866 INFO L125 PetriNetUnfolderBase]: For 1497/1501 co-relation queries the response was YES. [2024-12-02 13:23:14,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5313 conditions, 2052 events. 1085/2052 cut-off events. For 1497/1501 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 11316 event pairs, 639 based on Foata normal form. 7/1915 useless extension candidates. Maximal degree in co-relation 5258. Up to 1246 conditions per place. [2024-12-02 13:23:14,877 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 84 selfloop transitions, 2 changer transitions 2/95 dead transitions. [2024-12-02 13:23:14,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 95 transitions, 683 flow [2024-12-02 13:23:14,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 13:23:14,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 13:23:14,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-12-02 13:23:14,878 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5736434108527132 [2024-12-02 13:23:14,878 INFO L175 Difference]: Start difference. First operand has 84 places, 72 transitions, 401 flow. Second operand 3 states and 74 transitions. [2024-12-02 13:23:14,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 95 transitions, 683 flow [2024-12-02 13:23:14,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 95 transitions, 679 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 13:23:14,885 INFO L231 Difference]: Finished difference. Result has 86 places, 72 transitions, 406 flow [2024-12-02 13:23:14,885 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=406, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2024-12-02 13:23:14,885 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2024-12-02 13:23:14,885 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 406 flow [2024-12-02 13:23:14,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2024-12-02 13:23:14,885 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:23:14,886 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:23:14,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 13:23:15,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:15,086 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:23:15,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:23:15,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1079065962, now seen corresponding path program 2 times [2024-12-02 13:23:15,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:23:15,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729594000] [2024-12-02 13:23:15,087 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:23:15,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:15,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:23:15,088 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:23:15,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 13:23:15,154 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 13:23:15,154 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:23:15,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 13:23:15,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:23:15,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-12-02 13:23:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-12-02 13:23:15,345 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:23:15,345 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:23:15,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729594000] [2024-12-02 13:23:15,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729594000] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:23:15,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:23:15,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 13:23:15,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492796564] [2024-12-02 13:23:15,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:23:15,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:23:15,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:23:15,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:23:15,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 13:23:15,363 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-12-02 13:23:15,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 406 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 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) [2024-12-02 13:23:15,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:23:15,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-12-02 13:23:15,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:23:15,627 INFO L124 PetriNetUnfolderBase]: 901/1776 cut-off events. [2024-12-02 13:23:15,627 INFO L125 PetriNetUnfolderBase]: For 1596/1596 co-relation queries the response was YES. [2024-12-02 13:23:15,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4489 conditions, 1776 events. 901/1776 cut-off events. For 1596/1596 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 10047 event pairs, 621 based on Foata normal form. 79/1736 useless extension candidates. Maximal degree in co-relation 4438. Up to 1275 conditions per place. [2024-12-02 13:23:15,633 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 47 selfloop transitions, 23 changer transitions 0/77 dead transitions. [2024-12-02 13:23:15,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 77 transitions, 558 flow [2024-12-02 13:23:15,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:23:15,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:23:15,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-12-02 13:23:15,635 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-12-02 13:23:15,635 INFO L175 Difference]: Start difference. First operand has 86 places, 72 transitions, 406 flow. Second operand 5 states and 84 transitions. [2024-12-02 13:23:15,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 77 transitions, 558 flow [2024-12-02 13:23:15,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 77 transitions, 548 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-02 13:23:15,638 INFO L231 Difference]: Finished difference. Result has 80 places, 69 transitions, 421 flow [2024-12-02 13:23:15,638 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=421, PETRI_PLACES=80, PETRI_TRANSITIONS=69} [2024-12-02 13:23:15,639 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-12-02 13:23:15,639 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 69 transitions, 421 flow [2024-12-02 13:23:15,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 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) [2024-12-02 13:23:15,639 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:23:15,639 INFO L206 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-12-02 13:23:15,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 13:23:15,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:15,840 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:23:15,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:23:15,840 INFO L85 PathProgramCache]: Analyzing trace with hash -353437462, now seen corresponding path program 3 times [2024-12-02 13:23:15,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:23:15,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038739915] [2024-12-02 13:23:15,840 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:23:15,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:15,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:23:15,842 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:23:15,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 13:23:16,240 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-12-02 13:23:16,240 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:23:16,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 13:23:16,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:23:16,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-12-02 13:23:16,886 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:23:16,886 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:23:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:23:19,322 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:23:19,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038739915] [2024-12-02 13:23:19,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038739915] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:23:19,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:23:19,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-12-02 13:23:19,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681454732] [2024-12-02 13:23:19,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 13:23:19,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-02 13:23:19,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:23:19,323 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-02 13:23:19,323 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2024-12-02 13:23:19,999 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-12-02 13:23:20,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 69 transitions, 421 flow. Second operand has 26 states, 26 states have (on average 10.76923076923077) internal successors, (280), 26 states have internal predecessors, (280), 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) [2024-12-02 13:23:20,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:23:20,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-12-02 13:23:20,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:23:37,355 INFO L124 PetriNetUnfolderBase]: 913/1782 cut-off events. [2024-12-02 13:23:37,355 INFO L125 PetriNetUnfolderBase]: For 2413/2413 co-relation queries the response was YES. [2024-12-02 13:23:37,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4797 conditions, 1782 events. 913/1782 cut-off events. For 2413/2413 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 9846 event pairs, 751 based on Foata normal form. 12/1670 useless extension candidates. Maximal degree in co-relation 4579. Up to 1525 conditions per place. [2024-12-02 13:23:37,362 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 33 selfloop transitions, 66 changer transitions 0/105 dead transitions. [2024-12-02 13:23:37,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 105 transitions, 871 flow [2024-12-02 13:23:37,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-12-02 13:23:37,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-12-02 13:23:37,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 515 transitions. [2024-12-02 13:23:37,366 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2603640040444894 [2024-12-02 13:23:37,366 INFO L175 Difference]: Start difference. First operand has 80 places, 69 transitions, 421 flow. Second operand 46 states and 515 transitions. [2024-12-02 13:23:37,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 105 transitions, 871 flow [2024-12-02 13:23:37,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 105 transitions, 801 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-02 13:23:37,371 INFO L231 Difference]: Finished difference. Result has 133 places, 105 transitions, 789 flow [2024-12-02 13:23:37,372 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=789, PETRI_PLACES=133, PETRI_TRANSITIONS=105} [2024-12-02 13:23:37,372 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-12-02 13:23:37,372 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 105 transitions, 789 flow [2024-12-02 13:23:37,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 10.76923076923077) internal successors, (280), 26 states have internal predecessors, (280), 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) [2024-12-02 13:23:37,373 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:23:37,373 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:23:37,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 13:23:37,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:37,573 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:23:37,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:23:37,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1592210245, now seen corresponding path program 1 times [2024-12-02 13:23:37,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:23:37,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324574929] [2024-12-02 13:23:37,574 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:23:37,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:23:37,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:23:37,575 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:23:37,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 13:23:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:23:37,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-12-02 13:23:37,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:23:37,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 13:23:37,983 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 13:23:37,991 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 13:23:37,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2024-12-02 13:23:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:23:38,020 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:23:51,434 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 81 treesize of output 75 [2024-12-02 13:23:51,508 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 13:23:51,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 142 [2024-12-02 13:23:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:23:58,039 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:23:58,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324574929] [2024-12-02 13:23:58,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324574929] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:23:58,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:23:58,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-12-02 13:23:58,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276512902] [2024-12-02 13:23:58,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 13:23:58,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 13:23:58,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:23:58,040 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 13:23:58,040 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=132, Unknown=3, NotChecked=0, Total=182 [2024-12-02 13:24:02,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-12-02 13:24:06,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-12-02 13:24:06,049 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-12-02 13:24:06,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 105 transitions, 789 flow. Second operand has 14 states, 14 states have (on average 11.428571428571429) internal successors, (160), 14 states have internal predecessors, (160), 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) [2024-12-02 13:24:06,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:24:06,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-12-02 13:24:06,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:24:10,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 13:24:14,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 13:24:18,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 13:24:22,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 13:24:26,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 13:24:30,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 13:24:34,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 13:24:38,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 13:24:42,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 13:24:46,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 13:24:50,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 13:24:54,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 13:24:58,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 13:25:02,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 13:25:06,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 13:25:10,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 13:25:15,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 13:25:19,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 13:25:23,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 13:25:27,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 13:25:31,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-12-02 13:25:35,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-12-02 13:25:39,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 13:25:43,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-12-02 13:25:47,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-12-02 13:25:51,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-12-02 13:25:55,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-12-02 13:25:59,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-12-02 13:26:11,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 13:26:15,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-12-02 13:26:19,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-12-02 13:26:23,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-12-02 13:26:27,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-12-02 13:26:31,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-12-02 13:26:35,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 13:26:39,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-12-02 13:26:43,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-12-02 13:26:47,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-12-02 13:26:51,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-12-02 13:26:56,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-12-02 13:27:00,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-12-02 13:27:00,479 INFO L124 PetriNetUnfolderBase]: 986/1909 cut-off events. [2024-12-02 13:27:00,479 INFO L125 PetriNetUnfolderBase]: For 1510/1510 co-relation queries the response was YES. [2024-12-02 13:27:00,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4965 conditions, 1909 events. 986/1909 cut-off events. For 1510/1510 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 10615 event pairs, 418 based on Foata normal form. 12/1793 useless extension candidates. Maximal degree in co-relation 4881. Up to 685 conditions per place. [2024-12-02 13:27:00,489 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 97 selfloop transitions, 53 changer transitions 19/175 dead transitions. [2024-12-02 13:27:00,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 175 transitions, 1345 flow [2024-12-02 13:27:00,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 13:27:00,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 13:27:00,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-12-02 13:27:00,492 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3974630021141649 [2024-12-02 13:27:00,492 INFO L175 Difference]: Start difference. First operand has 133 places, 105 transitions, 789 flow. Second operand 11 states and 188 transitions. [2024-12-02 13:27:00,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 175 transitions, 1345 flow [2024-12-02 13:27:00,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 175 transitions, 1183 flow, removed 51 selfloop flow, removed 21 redundant places. [2024-12-02 13:27:00,505 INFO L231 Difference]: Finished difference. Result has 126 places, 110 transitions, 796 flow [2024-12-02 13:27:00,505 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=796, PETRI_PLACES=126, PETRI_TRANSITIONS=110} [2024-12-02 13:27:00,505 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-12-02 13:27:00,505 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 110 transitions, 796 flow [2024-12-02 13:27:00,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.428571428571429) internal successors, (160), 14 states have internal predecessors, (160), 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) [2024-12-02 13:27:00,506 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:27:00,506 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:27:00,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-12-02 13:27:00,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:27:00,707 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:27:00,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:27:00,707 INFO L85 PathProgramCache]: Analyzing trace with hash -684818653, now seen corresponding path program 2 times [2024-12-02 13:27:00,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:27:00,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128171655] [2024-12-02 13:27:00,708 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:27:00,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:27:00,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:27:00,710 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:27:00,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 13:27:00,800 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:27:00,800 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:27:00,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-12-02 13:27:00,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:27:01,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 13:27:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:27:01,654 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:27:03,025 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 63 treesize of output 57 [2024-12-02 13:27:03,052 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 13:27:03,053 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 104 treesize of output 98 [2024-12-02 13:27:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:27:05,493 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:27:05,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128171655] [2024-12-02 13:27:05,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128171655] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:27:05,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:27:05,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2024-12-02 13:27:05,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468384078] [2024-12-02 13:27:05,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 13:27:05,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 13:27:05,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:27:05,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 13:27:05,495 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2024-12-02 13:27:05,901 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-12-02 13:27:05,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 110 transitions, 796 flow. Second operand has 18 states, 18 states have (on average 12.88888888888889) internal successors, (232), 18 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:27:05,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:27:05,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-12-02 13:27:05,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:27:11,276 WARN L286 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 132 DAG size of output: 126 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-12-02 13:27:19,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-12-02 13:27:20,419 INFO L124 PetriNetUnfolderBase]: 2115/4033 cut-off events. [2024-12-02 13:27:20,419 INFO L125 PetriNetUnfolderBase]: For 4716/4716 co-relation queries the response was YES. [2024-12-02 13:27:20,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10626 conditions, 4033 events. 2115/4033 cut-off events. For 4716/4716 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 26401 event pairs, 552 based on Foata normal form. 4/3779 useless extension candidates. Maximal degree in co-relation 10547. Up to 1222 conditions per place. [2024-12-02 13:27:20,453 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 134 selfloop transitions, 75 changer transitions 40/256 dead transitions. [2024-12-02 13:27:20,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 256 transitions, 1838 flow [2024-12-02 13:27:20,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 13:27:20,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-12-02 13:27:20,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 354 transitions. [2024-12-02 13:27:20,455 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-12-02 13:27:20,455 INFO L175 Difference]: Start difference. First operand has 126 places, 110 transitions, 796 flow. Second operand 18 states and 354 transitions. [2024-12-02 13:27:20,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 256 transitions, 1838 flow [2024-12-02 13:27:20,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 256 transitions, 1785 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-12-02 13:27:20,470 INFO L231 Difference]: Finished difference. Result has 146 places, 138 transitions, 1219 flow [2024-12-02 13:27:20,471 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1219, PETRI_PLACES=146, PETRI_TRANSITIONS=138} [2024-12-02 13:27:20,471 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-12-02 13:27:20,471 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 138 transitions, 1219 flow [2024-12-02 13:27:20,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.88888888888889) internal successors, (232), 18 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:27:20,471 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:27:20,472 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-12-02 13:27:20,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 13:27:20,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:27:20,672 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:27:20,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:27:20,673 INFO L85 PathProgramCache]: Analyzing trace with hash -415296816, now seen corresponding path program 3 times [2024-12-02 13:27:20,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:27:20,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369480091] [2024-12-02 13:27:20,673 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:27:20,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:27:20,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:27:20,675 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:27:20,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 13:27:20,752 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 13:27:20,752 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:27:20,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 13:27:20,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:27:20,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 13:27:20,986 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:27:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 13:27:21,415 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:27:21,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369480091] [2024-12-02 13:27:21,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369480091] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:27:21,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:27:21,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-12-02 13:27:21,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754725375] [2024-12-02 13:27:21,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 13:27:21,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 13:27:21,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:27:21,416 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 13:27:21,416 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-12-02 13:27:21,472 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-12-02 13:27:21,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 138 transitions, 1219 flow. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 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) [2024-12-02 13:27:21,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:27:21,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-12-02 13:27:21,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:27:22,344 INFO L124 PetriNetUnfolderBase]: 1906/3670 cut-off events. [2024-12-02 13:27:22,344 INFO L125 PetriNetUnfolderBase]: For 6237/6237 co-relation queries the response was YES. [2024-12-02 13:27:22,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10237 conditions, 3670 events. 1906/3670 cut-off events. For 6237/6237 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 23533 event pairs, 712 based on Foata normal form. 38/3469 useless extension candidates. Maximal degree in co-relation 10151. Up to 1940 conditions per place. [2024-12-02 13:27:22,359 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 74 selfloop transitions, 49 changer transitions 48/178 dead transitions. [2024-12-02 13:27:22,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 178 transitions, 1617 flow [2024-12-02 13:27:22,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 13:27:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-12-02 13:27:22,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-12-02 13:27:22,360 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-12-02 13:27:22,360 INFO L175 Difference]: Start difference. First operand has 146 places, 138 transitions, 1219 flow. Second operand 9 states and 170 transitions. [2024-12-02 13:27:22,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 178 transitions, 1617 flow [2024-12-02 13:27:22,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 178 transitions, 1537 flow, removed 20 selfloop flow, removed 11 redundant places. [2024-12-02 13:27:22,394 INFO L231 Difference]: Finished difference. Result has 143 places, 125 transitions, 1127 flow [2024-12-02 13:27:22,394 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1127, PETRI_PLACES=143, PETRI_TRANSITIONS=125} [2024-12-02 13:27:22,395 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-12-02 13:27:22,395 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 125 transitions, 1127 flow [2024-12-02 13:27:22,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 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) [2024-12-02 13:27:22,395 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:27:22,395 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:27:22,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-02 13:27:22,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:27:22,596 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:27:22,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:27:22,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1476722974, now seen corresponding path program 4 times [2024-12-02 13:27:22,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:27:22,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354989212] [2024-12-02 13:27:22,597 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 13:27:22,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:27:22,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:27:22,600 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:27:22,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 13:27:22,711 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 13:27:22,711 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:27:22,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-12-02 13:27:22,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:27:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:27:23,464 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:27:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:27:25,212 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:27:25,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354989212] [2024-12-02 13:27:25,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354989212] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:27:25,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:27:25,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2024-12-02 13:27:25,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236735936] [2024-12-02 13:27:25,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 13:27:25,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-12-02 13:27:25,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:27:25,214 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-12-02 13:27:25,214 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2024-12-02 13:27:25,344 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-12-02 13:27:25,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 125 transitions, 1127 flow. Second operand has 20 states, 20 states have (on average 12.8) internal successors, (256), 20 states have internal predecessors, (256), 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) [2024-12-02 13:27:25,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:27:25,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-12-02 13:27:25,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:27:27,530 INFO L124 PetriNetUnfolderBase]: 2760/5341 cut-off events. [2024-12-02 13:27:27,531 INFO L125 PetriNetUnfolderBase]: For 8350/8350 co-relation queries the response was YES. [2024-12-02 13:27:27,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14720 conditions, 5341 events. 2760/5341 cut-off events. For 8350/8350 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 35773 event pairs, 803 based on Foata normal form. 66/5074 useless extension candidates. Maximal degree in co-relation 14636. Up to 1568 conditions per place. [2024-12-02 13:27:27,550 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 163 selfloop transitions, 55 changer transitions 9/234 dead transitions. [2024-12-02 13:27:27,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 234 transitions, 2095 flow [2024-12-02 13:27:27,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 13:27:27,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-12-02 13:27:27,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 264 transitions. [2024-12-02 13:27:27,553 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-12-02 13:27:27,553 INFO L175 Difference]: Start difference. First operand has 143 places, 125 transitions, 1127 flow. Second operand 14 states and 264 transitions. [2024-12-02 13:27:27,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 234 transitions, 2095 flow [2024-12-02 13:27:27,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 234 transitions, 2017 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-12-02 13:27:27,572 INFO L231 Difference]: Finished difference. Result has 144 places, 159 transitions, 1524 flow [2024-12-02 13:27:27,573 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1524, PETRI_PLACES=144, PETRI_TRANSITIONS=159} [2024-12-02 13:27:27,573 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-12-02 13:27:27,573 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 159 transitions, 1524 flow [2024-12-02 13:27:27,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.8) internal successors, (256), 20 states have internal predecessors, (256), 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) [2024-12-02 13:27:27,573 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:27:27,574 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:27:27,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-02 13:27:27,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:27:27,774 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:27:27,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:27:27,775 INFO L85 PathProgramCache]: Analyzing trace with hash -940257192, now seen corresponding path program 5 times [2024-12-02 13:27:27,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:27:27,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126360629] [2024-12-02 13:27:27,775 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 13:27:27,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:27:27,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:27:27,777 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:27:27,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-02 13:27:27,855 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-12-02 13:27:27,856 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:27:27,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 13:27:27,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:27:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 13:27:27,882 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:27:27,882 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:27:27,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126360629] [2024-12-02 13:27:27,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126360629] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:27:27,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:27:27,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 13:27:27,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213612319] [2024-12-02 13:27:27,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:27:27,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 13:27:27,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:27:27,883 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 13:27:27,883 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 13:27:27,889 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-12-02 13:27:27,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 159 transitions, 1524 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2024-12-02 13:27:27,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:27:27,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-12-02 13:27:27,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:27:28,896 INFO L124 PetriNetUnfolderBase]: 4786/8344 cut-off events. [2024-12-02 13:27:28,896 INFO L125 PetriNetUnfolderBase]: For 12893/12893 co-relation queries the response was YES. [2024-12-02 13:27:28,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24241 conditions, 8344 events. 4786/8344 cut-off events. For 12893/12893 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 51562 event pairs, 931 based on Foata normal form. 462/8178 useless extension candidates. Maximal degree in co-relation 24156. Up to 4140 conditions per place. [2024-12-02 13:27:28,936 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 174 selfloop transitions, 4 changer transitions 3/184 dead transitions. [2024-12-02 13:27:28,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 184 transitions, 2048 flow [2024-12-02 13:27:28,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 13:27:28,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 13:27:28,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-12-02 13:27:28,937 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-12-02 13:27:28,938 INFO L175 Difference]: Start difference. First operand has 144 places, 159 transitions, 1524 flow. Second operand 4 states and 76 transitions. [2024-12-02 13:27:28,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 184 transitions, 2048 flow [2024-12-02 13:27:28,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 184 transitions, 1982 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-12-02 13:27:28,977 INFO L231 Difference]: Finished difference. Result has 144 places, 149 transitions, 1388 flow [2024-12-02 13:27:28,978 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1388, PETRI_PLACES=144, PETRI_TRANSITIONS=149} [2024-12-02 13:27:28,978 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-12-02 13:27:28,978 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 149 transitions, 1388 flow [2024-12-02 13:27:28,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2024-12-02 13:27:28,979 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:27:28,979 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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] [2024-12-02 13:27:28,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-12-02 13:27:29,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:27:29,179 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:27:29,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:27:29,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1485616748, now seen corresponding path program 1 times [2024-12-02 13:27:29,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:27:29,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14573212] [2024-12-02 13:27:29,180 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:27:29,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:27:29,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:27:29,182 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:27:29,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-02 13:27:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:27:29,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-12-02 13:27:29,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:27:29,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-12-02 13:27:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:27:30,891 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:27:31,495 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 13:27:31,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2024-12-02 13:27:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:27:35,826 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:27:35,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14573212] [2024-12-02 13:27:35,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14573212] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:27:35,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:27:35,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2024-12-02 13:27:35,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259280921] [2024-12-02 13:27:35,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 13:27:35,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-12-02 13:27:35,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:27:35,827 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-12-02 13:27:35,827 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2024-12-02 13:27:36,510 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-12-02 13:27:36,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 149 transitions, 1388 flow. Second operand has 22 states, 22 states have (on average 11.818181818181818) internal successors, (260), 22 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:27:36,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:27:36,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-12-02 13:27:36,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:27:52,410 INFO L124 PetriNetUnfolderBase]: 6282/12087 cut-off events. [2024-12-02 13:27:52,411 INFO L125 PetriNetUnfolderBase]: For 23727/23727 co-relation queries the response was YES. [2024-12-02 13:27:52,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36155 conditions, 12087 events. 6282/12087 cut-off events. For 23727/23727 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 90307 event pairs, 2192 based on Foata normal form. 16/11286 useless extension candidates. Maximal degree in co-relation 36068. Up to 3587 conditions per place. [2024-12-02 13:27:52,476 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 233 selfloop transitions, 119 changer transitions 73/432 dead transitions. [2024-12-02 13:27:52,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 432 transitions, 3560 flow [2024-12-02 13:27:52,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-12-02 13:27:52,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-12-02 13:27:52,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 579 transitions. [2024-12-02 13:27:52,479 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-12-02 13:27:52,479 INFO L175 Difference]: Start difference. First operand has 144 places, 149 transitions, 1388 flow. Second operand 30 states and 579 transitions. [2024-12-02 13:27:52,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 432 transitions, 3560 flow [2024-12-02 13:27:52,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 432 transitions, 3552 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-12-02 13:27:52,511 INFO L231 Difference]: Finished difference. Result has 187 places, 193 transitions, 2330 flow [2024-12-02 13:27:52,512 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1383, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2330, PETRI_PLACES=187, PETRI_TRANSITIONS=193} [2024-12-02 13:27:52,512 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 146 predicate places. [2024-12-02 13:27:52,512 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 193 transitions, 2330 flow [2024-12-02 13:27:52,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 11.818181818181818) internal successors, (260), 22 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:27:52,512 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:27:52,512 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:27:52,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-02 13:27:52,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:27:52,713 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-12-02 13:27:52,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:27:52,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1513758391, now seen corresponding path program 2 times [2024-12-02 13:27:52,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:27:52,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478548839] [2024-12-02 13:27:52,713 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:27:52,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:27:52,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:27:52,715 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:27:52,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7ca204f-2a27-43bd-ab62-505ddb2f2675/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-02 13:27:52,790 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:27:52,790 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:27:52,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-12-02 13:27:52,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:27:53,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 13:27:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:27:53,834 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:28:01,246 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 119 treesize of output 107 [2024-12-02 13:28:01,365 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 13:28:01,366 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 307 treesize of output 294 [2024-12-02 13:28:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:28:21,373 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:28:21,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478548839] [2024-12-02 13:28:21,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478548839] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:28:21,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:28:21,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2024-12-02 13:28:21,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18711555] [2024-12-02 13:28:21,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 13:28:21,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-12-02 13:28:21,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:28:21,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-12-02 13:28:21,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=397, Unknown=1, NotChecked=0, Total=552 [2024-12-02 13:28:25,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-12-02 13:28:30,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-12-02 13:28:30,336 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-12-02 13:28:30,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 193 transitions, 2330 flow. Second operand has 24 states, 24 states have (on average 10.666666666666666) internal successors, (256), 24 states have internal predecessors, (256), 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) [2024-12-02 13:28:30,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:28:30,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-12-02 13:28:30,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand