./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.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_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/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_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/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_3d5516e2-8c78-486b-b18c-9a405a15187e/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 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 11:22:18,633 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 11:22:18,688 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 11:22:18,692 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 11:22:18,693 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 11:22:18,714 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 11:22:18,715 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 11:22:18,715 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 11:22:18,715 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 11:22:18,715 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 11:22:18,715 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 11:22:18,716 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 11:22:18,716 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 11:22:18,716 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 11:22:18,716 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 11:22:18,716 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 11:22:18,716 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 11:22:18,716 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 11:22:18,717 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 11:22:18,717 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 11:22:18,717 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 11:22:18,717 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 11:22:18,717 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 11:22:18,717 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 11:22:18,717 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 11:22:18,717 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 11:22:18,717 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 11:22:18,717 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 11:22:18,717 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 11:22:18,718 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 11:22:18,718 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 11:22:18,718 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 11:22:18,718 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 11:22:18,718 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 11:22:18,718 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 11:22:18,718 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 11:22:18,718 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 11:22:18,718 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 11:22:18,718 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 11:22:18,719 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 11:22:18,719 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 11:22:18,719 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 11:22:18,719 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 11:22:18,719 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 11:22:18,719 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 11:22:18,719 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 11:22:18,719 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 11:22:18,719 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_3d5516e2-8c78-486b-b18c-9a405a15187e/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 -> 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a [2024-12-02 11:22:18,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 11:22:18,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 11:22:18,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 11:22:18,937 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 11:22:18,937 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 11:22:18,938 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2024-12-02 11:22:21,570 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/data/4522ca1e9/b72a5267f8064ec2ba70c4a23df239d9/FLAG944494785 [2024-12-02 11:22:21,780 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 11:22:21,780 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2024-12-02 11:22:21,788 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/data/4522ca1e9/b72a5267f8064ec2ba70c4a23df239d9/FLAG944494785 [2024-12-02 11:22:21,802 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/data/4522ca1e9/b72a5267f8064ec2ba70c4a23df239d9 [2024-12-02 11:22:21,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 11:22:21,805 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 11:22:21,806 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 11:22:21,806 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 11:22:21,809 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 11:22:21,810 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 11:22:21" (1/1) ... [2024-12-02 11:22:21,811 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44fd7529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:22:21, skipping insertion in model container [2024-12-02 11:22:21,811 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 11:22:21" (1/1) ... [2024-12-02 11:22:21,824 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 11:22:21,957 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 11:22:21,962 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 11:22:21,969 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 11:22:21,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 11:22:22,003 INFO L204 MainTranslator]: Completed translation [2024-12-02 11:22:22,003 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:22:22 WrapperNode [2024-12-02 11:22:22,003 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 11:22:22,004 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 11:22:22,004 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 11:22:22,004 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 11:22:22,011 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:22:22" (1/1) ... [2024-12-02 11:22:22,017 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:22:22" (1/1) ... [2024-12-02 11:22:22,039 INFO L138 Inliner]: procedures = 24, calls = 31, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 180 [2024-12-02 11:22:22,040 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 11:22:22,040 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 11:22:22,040 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 11:22:22,040 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 11:22:22,047 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:22:22" (1/1) ... [2024-12-02 11:22:22,047 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:22:22" (1/1) ... [2024-12-02 11:22:22,050 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:22:22" (1/1) ... [2024-12-02 11:22:22,064 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 11:22:22,064 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:22:22" (1/1) ... [2024-12-02 11:22:22,064 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:22:22" (1/1) ... [2024-12-02 11:22:22,071 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:22:22" (1/1) ... [2024-12-02 11:22:22,072 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:22:22" (1/1) ... [2024-12-02 11:22:22,076 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:22:22" (1/1) ... [2024-12-02 11:22:22,078 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:22:22" (1/1) ... [2024-12-02 11:22:22,079 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:22:22" (1/1) ... [2024-12-02 11:22:22,081 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 11:22:22,082 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 11:22:22,082 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 11:22:22,082 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 11:22:22,083 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:22:22" (1/1) ... [2024-12-02 11:22:22,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 11:22:22,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:22:22,106 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 11:22:22,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 11:22:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 11:22:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 11:22:22,129 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 11:22:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 11:22:22,129 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 11:22:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-12-02 11:22:22,129 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-12-02 11:22:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 11:22:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 11:22:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 11:22:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 11:22:22,130 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-12-02 11:22:22,130 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-12-02 11:22:22,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 11:22:22,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 11:22:22,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 11:22:22,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 11:22:22,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 11:22:22,132 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 11:22:22,228 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 11:22:22,230 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 11:22:22,536 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 11:22:22,536 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 11:22:22,796 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 11:22:22,796 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-12-02 11:22:22,796 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 11:22:22 BoogieIcfgContainer [2024-12-02 11:22:22,796 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 11:22:22,798 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 11:22:22,798 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 11:22:22,803 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 11:22:22,803 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 11:22:21" (1/3) ... [2024-12-02 11:22:22,804 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f94a90c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 11:22:22, skipping insertion in model container [2024-12-02 11:22:22,804 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:22:22" (2/3) ... [2024-12-02 11:22:22,804 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f94a90c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 11:22:22, skipping insertion in model container [2024-12-02 11:22:22,804 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 11:22:22" (3/3) ... [2024-12-02 11:22:22,805 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2024-12-02 11:22:22,821 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 11:22:22,823 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-array-sum-alt2.wvr.c that has 4 procedures, 41 locations, 1 initial locations, 4 loop locations, and 10 error locations. [2024-12-02 11:22:22,823 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 11:22:22,880 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-12-02 11:22:22,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 44 transitions, 109 flow [2024-12-02 11:22:22,942 INFO L124 PetriNetUnfolderBase]: 4/41 cut-off events. [2024-12-02 11:22:22,944 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-02 11:22:22,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 41 events. 4/41 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 85 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2024-12-02 11:22:22,948 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 44 transitions, 109 flow [2024-12-02 11:22:22,950 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 40 transitions, 98 flow [2024-12-02 11:22:22,958 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 11:22:22,970 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;@61cc6e22, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 11:22:22,970 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-12-02 11:22:22,973 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 11:22:22,973 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-12-02 11:22:22,973 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 11:22:22,974 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:22:22,974 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 11:22:22,975 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:22:22,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:22:22,980 INFO L85 PathProgramCache]: Analyzing trace with hash 609152, now seen corresponding path program 1 times [2024-12-02 11:22:22,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:22:22,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518519428] [2024-12-02 11:22:22,988 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:22:22,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:22:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:22:23,194 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 11:22:23,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:22:23,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518519428] [2024-12-02 11:22:23,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518519428] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:22:23,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:22:23,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-12-02 11:22:23,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756392682] [2024-12-02 11:22:23,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:22:23,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 11:22:23,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:22:23,224 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 11:22:23,225 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 11:22:23,235 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-12-02 11:22:23,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 98 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 11:22:23,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:22:23,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-12-02 11:22:23,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:22:23,603 INFO L124 PetriNetUnfolderBase]: 1316/1924 cut-off events. [2024-12-02 11:22:23,604 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2024-12-02 11:22:23,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3937 conditions, 1924 events. 1316/1924 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9789 event pairs, 1060 based on Foata normal form. 1/1371 useless extension candidates. Maximal degree in co-relation 3631. Up to 1877 conditions per place. [2024-12-02 11:22:23,621 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 30 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-12-02 11:22:23,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 156 flow [2024-12-02 11:22:23,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 11:22:23,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 11:22:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-12-02 11:22:23,634 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-12-02 11:22:23,636 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 98 flow. Second operand 3 states and 61 transitions. [2024-12-02 11:22:23,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 156 flow [2024-12-02 11:22:23,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-02 11:22:23,648 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 84 flow [2024-12-02 11:22:23,651 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-12-02 11:22:23,654 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -7 predicate places. [2024-12-02 11:22:23,654 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 84 flow [2024-12-02 11:22:23,654 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 11:22:23,654 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:22:23,654 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 11:22:23,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 11:22:23,655 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:22:23,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:22:23,655 INFO L85 PathProgramCache]: Analyzing trace with hash 609153, now seen corresponding path program 1 times [2024-12-02 11:22:23,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:22:23,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45152920] [2024-12-02 11:22:23,656 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:22:23,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:22:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:22:23,894 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 11:22:23,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:22:23,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45152920] [2024-12-02 11:22:23,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45152920] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:22:23,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:22:23,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 11:22:23,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462417187] [2024-12-02 11:22:23,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:22:23,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 11:22:23,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:22:23,896 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 11:22:23,896 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 11:22:23,903 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-12-02 11:22:23,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 84 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 11:22:23,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:22:23,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-12-02 11:22:23,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:22:24,150 INFO L124 PetriNetUnfolderBase]: 1317/1927 cut-off events. [2024-12-02 11:22:24,150 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-12-02 11:22:24,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3859 conditions, 1927 events. 1317/1927 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9837 event pairs, 1060 based on Foata normal form. 0/1373 useless extension candidates. Maximal degree in co-relation 3837. Up to 1882 conditions per place. [2024-12-02 11:22:24,160 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-12-02 11:22:24,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 164 flow [2024-12-02 11:22:24,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 11:22:24,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 11:22:24,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-12-02 11:22:24,162 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-12-02 11:22:24,162 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 84 flow. Second operand 4 states and 73 transitions. [2024-12-02 11:22:24,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 164 flow [2024-12-02 11:22:24,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 11:22:24,164 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 107 flow [2024-12-02 11:22:24,165 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-12-02 11:22:24,165 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2024-12-02 11:22:24,165 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 107 flow [2024-12-02 11:22:24,165 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 11:22:24,165 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:22:24,166 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-12-02 11:22:24,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 11:22:24,166 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:22:24,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:22:24,166 INFO L85 PathProgramCache]: Analyzing trace with hash 585415132, now seen corresponding path program 1 times [2024-12-02 11:22:24,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:22:24,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059726132] [2024-12-02 11:22:24,167 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:22:24,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:22:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:22:24,438 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 11:22:24,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:22:24,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059726132] [2024-12-02 11:22:24,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059726132] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:22:24,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637561303] [2024-12-02 11:22:24,439 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:22:24,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:22:24,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:22:24,441 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:22:24,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 11:22:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:22:24,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-12-02 11:22:24,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:22:24,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-12-02 11:22:24,826 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 11:22:24,826 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:22:24,952 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 11:22:24,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637561303] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:22:24,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:22:24,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-12-02 11:22:24,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622414542] [2024-12-02 11:22:24,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:22:24,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 11:22:24,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:22:24,953 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 11:22:24,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-12-02 11:22:25,000 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-12-02 11:22:25,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 107 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 11:22:25,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:22:25,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-12-02 11:22:25,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:22:25,606 INFO L124 PetriNetUnfolderBase]: 1318/1929 cut-off events. [2024-12-02 11:22:25,606 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-12-02 11:22:25,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3875 conditions, 1929 events. 1318/1929 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9847 event pairs, 1060 based on Foata normal form. 0/1374 useless extension candidates. Maximal degree in co-relation 3844. Up to 1879 conditions per place. [2024-12-02 11:22:25,620 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 28 selfloop transitions, 10 changer transitions 0/42 dead transitions. [2024-12-02 11:22:25,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 191 flow [2024-12-02 11:22:25,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 11:22:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 11:22:25,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-12-02 11:22:25,622 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-12-02 11:22:25,622 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 107 flow. Second operand 8 states and 112 transitions. [2024-12-02 11:22:25,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 191 flow [2024-12-02 11:22:25,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 11:22:25,624 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 132 flow [2024-12-02 11:22:25,624 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=132, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-12-02 11:22:25,625 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 1 predicate places. [2024-12-02 11:22:25,625 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 132 flow [2024-12-02 11:22:25,625 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 11:22:25,625 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:22:25,625 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-12-02 11:22:25,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 11:22:25,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:22:25,826 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:22:25,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:22:25,826 INFO L85 PathProgramCache]: Analyzing trace with hash 970344253, now seen corresponding path program 1 times [2024-12-02 11:22:25,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:22:25,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067529059] [2024-12-02 11:22:25,827 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:22:25,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:22:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:22:25,906 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 11:22:25,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:22:25,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067529059] [2024-12-02 11:22:25,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067529059] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:22:25,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:22:25,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 11:22:25,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152715904] [2024-12-02 11:22:25,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:22:25,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 11:22:25,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:22:25,907 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 11:22:25,907 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 11:22:25,914 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-12-02 11:22:25,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 11:22:25,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:22:25,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-12-02 11:22:25,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:22:26,114 INFO L124 PetriNetUnfolderBase]: 794/1175 cut-off events. [2024-12-02 11:22:26,115 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-12-02 11:22:26,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2375 conditions, 1175 events. 794/1175 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5295 event pairs, 608 based on Foata normal form. 0/959 useless extension candidates. Maximal degree in co-relation 2337. Up to 1136 conditions per place. [2024-12-02 11:22:26,121 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 31 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2024-12-02 11:22:26,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 39 transitions, 196 flow [2024-12-02 11:22:26,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 11:22:26,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 11:22:26,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-12-02 11:22:26,122 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-12-02 11:22:26,122 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 132 flow. Second operand 4 states and 68 transitions. [2024-12-02 11:22:26,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 39 transitions, 196 flow [2024-12-02 11:22:26,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 154 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-12-02 11:22:26,124 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 92 flow [2024-12-02 11:22:26,124 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2024-12-02 11:22:26,125 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -6 predicate places. [2024-12-02 11:22:26,125 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 92 flow [2024-12-02 11:22:26,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 11:22:26,125 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:22:26,125 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-12-02 11:22:26,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 11:22:26,125 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:22:26,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:22:26,126 INFO L85 PathProgramCache]: Analyzing trace with hash 970344254, now seen corresponding path program 1 times [2024-12-02 11:22:26,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:22:26,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403470215] [2024-12-02 11:22:26,126 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:22:26,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:22:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:22:26,200 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 11:22:26,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:22:26,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403470215] [2024-12-02 11:22:26,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403470215] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:22:26,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:22:26,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 11:22:26,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283522916] [2024-12-02 11:22:26,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:22:26,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 11:22:26,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:22:26,201 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 11:22:26,202 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 11:22:26,209 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-12-02 11:22:26,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 11:22:26,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:22:26,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-12-02 11:22:26,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:22:26,501 INFO L124 PetriNetUnfolderBase]: 1375/2055 cut-off events. [2024-12-02 11:22:26,501 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-12-02 11:22:26,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4123 conditions, 2055 events. 1375/2055 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 9951 event pairs, 908 based on Foata normal form. 0/1699 useless extension candidates. Maximal degree in co-relation 2758. Up to 1350 conditions per place. [2024-12-02 11:22:26,513 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 68 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2024-12-02 11:22:26,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 76 transitions, 320 flow [2024-12-02 11:22:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 11:22:26,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 11:22:26,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-12-02 11:22:26,514 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-12-02 11:22:26,514 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 92 flow. Second operand 5 states and 116 transitions. [2024-12-02 11:22:26,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 76 transitions, 320 flow [2024-12-02 11:22:26,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 76 transitions, 315 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 11:22:26,516 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 112 flow [2024-12-02 11:22:26,517 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2024-12-02 11:22:26,517 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -2 predicate places. [2024-12-02 11:22:26,518 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 112 flow [2024-12-02 11:22:26,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 11:22:26,518 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:22:26,518 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:22:26,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 11:22:26,518 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:22:26,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:22:26,519 INFO L85 PathProgramCache]: Analyzing trace with hash 491784939, now seen corresponding path program 1 times [2024-12-02 11:22:26,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:22:26,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194959197] [2024-12-02 11:22:26,519 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:22:26,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:22:26,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:22:26,602 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 11:22:26,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:22:26,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194959197] [2024-12-02 11:22:26,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194959197] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:22:26,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:22:26,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 11:22:26,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689300488] [2024-12-02 11:22:26,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:22:26,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 11:22:26,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:22:26,603 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 11:22:26,603 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 11:22:26,613 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-12-02 11:22:26,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:22:26,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:22:26,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-12-02 11:22:26,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:22:26,876 INFO L124 PetriNetUnfolderBase]: 1172/1762 cut-off events. [2024-12-02 11:22:26,876 INFO L125 PetriNetUnfolderBase]: For 379/451 co-relation queries the response was YES. [2024-12-02 11:22:26,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3846 conditions, 1762 events. 1172/1762 cut-off events. For 379/451 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8143 event pairs, 848 based on Foata normal form. 0/1460 useless extension candidates. Maximal degree in co-relation 2937. Up to 1361 conditions per place. [2024-12-02 11:22:26,886 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 61 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2024-12-02 11:22:26,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 69 transitions, 316 flow [2024-12-02 11:22:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 11:22:26,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 11:22:26,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-12-02 11:22:26,887 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-12-02 11:22:26,887 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 112 flow. Second operand 5 states and 109 transitions. [2024-12-02 11:22:26,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 69 transitions, 316 flow [2024-12-02 11:22:26,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 69 transitions, 311 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 11:22:26,889 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 132 flow [2024-12-02 11:22:26,889 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-12-02 11:22:26,890 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2024-12-02 11:22:26,890 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 132 flow [2024-12-02 11:22:26,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:22:26,890 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:22:26,891 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:22:26,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-02 11:22:26,891 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:22:26,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:22:26,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1757055229, now seen corresponding path program 1 times [2024-12-02 11:22:26,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:22:26,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001926918] [2024-12-02 11:22:26,891 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:22:26,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:22:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:22:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:22:27,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:22:27,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001926918] [2024-12-02 11:22:27,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001926918] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:22:27,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388595774] [2024-12-02 11:22:27,048 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:22:27,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:22:27,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:22:27,050 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:22:27,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 11:22:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:22:27,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 11:22:27,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:22:27,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:22:27,184 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:22:27,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-12-02 11:22:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:22:27,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388595774] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:22:27,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:22:27,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-12-02 11:22:27,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244664311] [2024-12-02 11:22:27,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:22:27,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 11:22:27,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:22:27,240 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 11:22:27,241 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-12-02 11:22:27,270 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-12-02 11:22:27,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 132 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 11:22:27,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:22:27,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-12-02 11:22:27,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:22:27,686 INFO L124 PetriNetUnfolderBase]: 1373/2063 cut-off events. [2024-12-02 11:22:27,686 INFO L125 PetriNetUnfolderBase]: For 763/920 co-relation queries the response was YES. [2024-12-02 11:22:27,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4845 conditions, 2063 events. 1373/2063 cut-off events. For 763/920 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9935 event pairs, 583 based on Foata normal form. 0/1798 useless extension candidates. Maximal degree in co-relation 3766. Up to 988 conditions per place. [2024-12-02 11:22:27,698 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 77 selfloop transitions, 10 changer transitions 0/91 dead transitions. [2024-12-02 11:22:27,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 91 transitions, 422 flow [2024-12-02 11:22:27,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 11:22:27,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 11:22:27,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-12-02 11:22:27,699 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5032467532467533 [2024-12-02 11:22:27,700 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 132 flow. Second operand 7 states and 155 transitions. [2024-12-02 11:22:27,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 91 transitions, 422 flow [2024-12-02 11:22:27,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 91 transitions, 417 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 11:22:27,702 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 171 flow [2024-12-02 11:22:27,703 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=171, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-12-02 11:22:27,703 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2024-12-02 11:22:27,703 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 171 flow [2024-12-02 11:22:27,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 11:22:27,704 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:22:27,704 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:22:27,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 11:22:27,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:22:27,904 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:22:27,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:22:27,905 INFO L85 PathProgramCache]: Analyzing trace with hash -609067664, now seen corresponding path program 1 times [2024-12-02 11:22:27,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:22:27,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709157768] [2024-12-02 11:22:27,905 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:22:27,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:22:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:22:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:22:28,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:22:28,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709157768] [2024-12-02 11:22:28,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709157768] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:22:28,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753485084] [2024-12-02 11:22:28,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:22:28,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:22:28,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:22:28,055 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:22:28,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 11:22:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:22:28,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 11:22:28,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:22:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:22:28,176 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:22:28,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-12-02 11:22:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:22:28,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753485084] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:22:28,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:22:28,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-12-02 11:22:28,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468054452] [2024-12-02 11:22:28,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:22:28,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 11:22:28,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:22:28,233 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 11:22:28,234 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-12-02 11:22:28,255 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-12-02 11:22:28,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 171 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 11:22:28,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:22:28,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-12-02 11:22:28,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:22:28,762 INFO L124 PetriNetUnfolderBase]: 1912/2847 cut-off events. [2024-12-02 11:22:28,762 INFO L125 PetriNetUnfolderBase]: For 2626/2861 co-relation queries the response was YES. [2024-12-02 11:22:28,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7617 conditions, 2847 events. 1912/2847 cut-off events. For 2626/2861 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14000 event pairs, 874 based on Foata normal form. 0/2614 useless extension candidates. Maximal degree in co-relation 6519. Up to 1390 conditions per place. [2024-12-02 11:22:28,779 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 84 selfloop transitions, 10 changer transitions 0/98 dead transitions. [2024-12-02 11:22:28,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 98 transitions, 535 flow [2024-12-02 11:22:28,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 11:22:28,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 11:22:28,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-12-02 11:22:28,782 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4967532467532468 [2024-12-02 11:22:28,783 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 171 flow. Second operand 7 states and 153 transitions. [2024-12-02 11:22:28,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 98 transitions, 535 flow [2024-12-02 11:22:28,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 98 transitions, 518 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-12-02 11:22:28,787 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 202 flow [2024-12-02 11:22:28,787 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=202, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2024-12-02 11:22:28,788 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 12 predicate places. [2024-12-02 11:22:28,788 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 202 flow [2024-12-02 11:22:28,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 11:22:28,788 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:22:28,788 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:22:28,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 11:22:28,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:22:28,989 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:22:28,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:22:28,989 INFO L85 PathProgramCache]: Analyzing trace with hash 152094039, now seen corresponding path program 1 times [2024-12-02 11:22:28,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:22:28,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328537395] [2024-12-02 11:22:28,989 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:22:28,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:22:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:22:29,059 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 11:22:29,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:22:29,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328537395] [2024-12-02 11:22:29,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328537395] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:22:29,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:22:29,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 11:22:29,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74022975] [2024-12-02 11:22:29,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:22:29,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 11:22:29,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:22:29,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 11:22:29,060 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 11:22:29,079 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-12-02 11:22:29,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 11:22:29,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:22:29,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-12-02 11:22:29,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:22:29,430 INFO L124 PetriNetUnfolderBase]: 2101/3015 cut-off events. [2024-12-02 11:22:29,431 INFO L125 PetriNetUnfolderBase]: For 4923/5264 co-relation queries the response was YES. [2024-12-02 11:22:29,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9266 conditions, 3015 events. 2101/3015 cut-off events. For 4923/5264 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 13795 event pairs, 1546 based on Foata normal form. 0/2798 useless extension candidates. Maximal degree in co-relation 8592. Up to 2733 conditions per place. [2024-12-02 11:22:29,450 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 60 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2024-12-02 11:22:29,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 68 transitions, 392 flow [2024-12-02 11:22:29,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 11:22:29,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 11:22:29,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-12-02 11:22:29,452 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-12-02 11:22:29,452 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 202 flow. Second operand 5 states and 102 transitions. [2024-12-02 11:22:29,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 68 transitions, 392 flow [2024-12-02 11:22:29,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 68 transitions, 377 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-12-02 11:22:29,457 INFO L231 Difference]: Finished difference. Result has 60 places, 51 transitions, 214 flow [2024-12-02 11:22:29,457 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=60, PETRI_TRANSITIONS=51} [2024-12-02 11:22:29,457 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2024-12-02 11:22:29,458 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 51 transitions, 214 flow [2024-12-02 11:22:29,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 11:22:29,458 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:22:29,458 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:22:29,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-12-02 11:22:29,458 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:22:29,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:22:29,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1665272304, now seen corresponding path program 1 times [2024-12-02 11:22:29,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:22:29,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831675527] [2024-12-02 11:22:29,459 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:22:29,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:22:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:22:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:22:29,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:22:29,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831675527] [2024-12-02 11:22:29,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831675527] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:22:29,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609291330] [2024-12-02 11:22:29,555 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:22:29,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:22:29,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:22:29,557 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:22:29,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 11:22:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:22:29,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 11:22:29,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:22:29,688 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 11:22:29,688 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:22:29,742 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 11:22:29,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609291330] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:22:29,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:22:29,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-12-02 11:22:29,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790476523] [2024-12-02 11:22:29,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:22:29,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 11:22:29,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:22:29,743 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 11:22:29,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-12-02 11:22:29,780 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-12-02 11:22:29,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 51 transitions, 214 flow. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:22:29,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:22:29,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-12-02 11:22:29,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:22:30,296 INFO L124 PetriNetUnfolderBase]: 3628/5261 cut-off events. [2024-12-02 11:22:30,296 INFO L125 PetriNetUnfolderBase]: For 6633/7056 co-relation queries the response was YES. [2024-12-02 11:22:30,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16358 conditions, 5261 events. 3628/5261 cut-off events. For 6633/7056 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 27053 event pairs, 2002 based on Foata normal form. 86/5117 useless extension candidates. Maximal degree in co-relation 15640. Up to 2940 conditions per place. [2024-12-02 11:22:30,322 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 104 selfloop transitions, 13 changer transitions 0/120 dead transitions. [2024-12-02 11:22:30,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 120 transitions, 728 flow [2024-12-02 11:22:30,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 11:22:30,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 11:22:30,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-12-02 11:22:30,324 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-12-02 11:22:30,324 INFO L175 Difference]: Start difference. First operand has 60 places, 51 transitions, 214 flow. Second operand 8 states and 165 transitions. [2024-12-02 11:22:30,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 120 transitions, 728 flow [2024-12-02 11:22:30,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 120 transitions, 723 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 11:22:30,330 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 285 flow [2024-12-02 11:22:30,330 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=285, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2024-12-02 11:22:30,331 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2024-12-02 11:22:30,331 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 285 flow [2024-12-02 11:22:30,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:22:30,331 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:22:30,331 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:22:30,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 11:22:30,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-12-02 11:22:30,532 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:22:30,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:22:30,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1205302628, now seen corresponding path program 1 times [2024-12-02 11:22:30,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:22:30,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851912878] [2024-12-02 11:22:30,532 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:22:30,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:22:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:22:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:22:30,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:22:30,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851912878] [2024-12-02 11:22:30,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851912878] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:22:30,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798370100] [2024-12-02 11:22:30,705 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:22:30,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:22:30,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:22:30,707 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:22:30,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 11:22:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:22:30,775 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 11:22:30,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:22:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:22:30,917 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 11:22:30,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798370100] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:22:30,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 11:22:30,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-12-02 11:22:30,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695375917] [2024-12-02 11:22:30,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:22:30,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 11:22:30,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:22:30,918 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 11:22:30,918 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-12-02 11:22:30,956 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-12-02 11:22:30,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 285 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:22:30,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:22:30,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-12-02 11:22:30,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:22:31,344 INFO L124 PetriNetUnfolderBase]: 2977/4337 cut-off events. [2024-12-02 11:22:31,344 INFO L125 PetriNetUnfolderBase]: For 10505/10968 co-relation queries the response was YES. [2024-12-02 11:22:31,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15030 conditions, 4337 events. 2977/4337 cut-off events. For 10505/10968 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21394 event pairs, 999 based on Foata normal form. 0/4148 useless extension candidates. Maximal degree in co-relation 8069. Up to 1920 conditions per place. [2024-12-02 11:22:31,361 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 91 selfloop transitions, 10 changer transitions 0/104 dead transitions. [2024-12-02 11:22:31,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 104 transitions, 805 flow [2024-12-02 11:22:31,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 11:22:31,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 11:22:31,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-12-02 11:22:31,362 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-12-02 11:22:31,362 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 285 flow. Second operand 6 states and 110 transitions. [2024-12-02 11:22:31,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 104 transitions, 805 flow [2024-12-02 11:22:31,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 104 transitions, 781 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-12-02 11:22:31,370 INFO L231 Difference]: Finished difference. Result has 68 places, 54 transitions, 287 flow [2024-12-02 11:22:31,371 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=287, PETRI_PLACES=68, PETRI_TRANSITIONS=54} [2024-12-02 11:22:31,371 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2024-12-02 11:22:31,371 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 54 transitions, 287 flow [2024-12-02 11:22:31,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:22:31,371 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:22:31,372 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:22:31,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 11:22:31,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:22:31,572 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:22:31,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:22:31,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1502672810, now seen corresponding path program 1 times [2024-12-02 11:22:31,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:22:31,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710664180] [2024-12-02 11:22:31,573 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:22:31,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:22:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:22:31,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:22:31,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:22:31,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710664180] [2024-12-02 11:22:31,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710664180] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:22:31,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981187973] [2024-12-02 11:22:31,659 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:22:31,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:22:31,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:22:31,661 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:22:31,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 11:22:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:22:31,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 11:22:31,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:22:31,822 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 11:22:31,822 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:22:31,881 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 11:22:31,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981187973] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:22:31,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:22:31,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-12-02 11:22:31,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582954661] [2024-12-02 11:22:31,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:22:31,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-12-02 11:22:31,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:22:31,883 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-12-02 11:22:31,883 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-12-02 11:22:31,924 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-12-02 11:22:31,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 54 transitions, 287 flow. Second operand has 15 states, 15 states have (on average 11.2) internal successors, (168), 15 states have internal predecessors, (168), 0 states have call successors, (0), 0 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 11:22:31,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:22:31,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-12-02 11:22:31,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:22:32,473 INFO L124 PetriNetUnfolderBase]: 2677/3873 cut-off events. [2024-12-02 11:22:32,473 INFO L125 PetriNetUnfolderBase]: For 8754/9210 co-relation queries the response was YES. [2024-12-02 11:22:32,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13795 conditions, 3873 events. 2677/3873 cut-off events. For 8754/9210 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18127 event pairs, 1559 based on Foata normal form. 54/3924 useless extension candidates. Maximal degree in co-relation 8628. Up to 2459 conditions per place. [2024-12-02 11:22:32,490 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 89 selfloop transitions, 13 changer transitions 0/105 dead transitions. [2024-12-02 11:22:32,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 105 transitions, 747 flow [2024-12-02 11:22:32,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 11:22:32,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 11:22:32,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-12-02 11:22:32,491 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-12-02 11:22:32,491 INFO L175 Difference]: Start difference. First operand has 68 places, 54 transitions, 287 flow. Second operand 8 states and 156 transitions. [2024-12-02 11:22:32,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 105 transitions, 747 flow [2024-12-02 11:22:32,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 105 transitions, 705 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-12-02 11:22:32,500 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 343 flow [2024-12-02 11:22:32,500 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=343, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2024-12-02 11:22:32,501 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 27 predicate places. [2024-12-02 11:22:32,501 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 343 flow [2024-12-02 11:22:32,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.2) internal successors, (168), 15 states have internal predecessors, (168), 0 states have call successors, (0), 0 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 11:22:32,501 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:22:32,501 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:22:32,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 11:22:32,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:22:32,701 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:22:32,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:22:32,702 INFO L85 PathProgramCache]: Analyzing trace with hash -794896021, now seen corresponding path program 2 times [2024-12-02 11:22:32,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:22:32,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595575756] [2024-12-02 11:22:32,702 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 11:22:32,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:22:32,717 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 11:22:32,717 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:22:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 11:22:32,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:22:32,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595575756] [2024-12-02 11:22:32,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595575756] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:22:32,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121366506] [2024-12-02 11:22:32,926 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 11:22:32,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:22:32,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:22:32,928 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:22:32,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 11:22:32,989 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 11:22:32,989 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:22:32,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-12-02 11:22:32,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:22:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:22:33,116 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:22:33,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-12-02 11:22:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:22:33,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121366506] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:22:33,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:22:33,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-12-02 11:22:33,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004541668] [2024-12-02 11:22:33,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:22:33,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-12-02 11:22:33,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:22:33,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-12-02 11:22:33,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-12-02 11:22:33,483 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-12-02 11:22:33,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 343 flow. Second operand has 20 states, 20 states have (on average 10.9) internal successors, (218), 20 states have internal predecessors, (218), 0 states have call successors, (0), 0 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 11:22:33,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:22:33,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-12-02 11:22:33,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:22:34,532 INFO L124 PetriNetUnfolderBase]: 3091/4409 cut-off events. [2024-12-02 11:22:34,532 INFO L125 PetriNetUnfolderBase]: For 11268/11891 co-relation queries the response was YES. [2024-12-02 11:22:34,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16159 conditions, 4409 events. 3091/4409 cut-off events. For 11268/11891 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 20863 event pairs, 499 based on Foata normal form. 144/4549 useless extension candidates. Maximal degree in co-relation 10659. Up to 756 conditions per place. [2024-12-02 11:22:34,548 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 169 selfloop transitions, 21 changer transitions 0/193 dead transitions. [2024-12-02 11:22:34,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 193 transitions, 1345 flow [2024-12-02 11:22:34,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 11:22:34,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-12-02 11:22:34,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 289 transitions. [2024-12-02 11:22:34,550 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46915584415584416 [2024-12-02 11:22:34,550 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 343 flow. Second operand 14 states and 289 transitions. [2024-12-02 11:22:34,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 193 transitions, 1345 flow [2024-12-02 11:22:34,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 193 transitions, 1317 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-12-02 11:22:34,567 INFO L231 Difference]: Finished difference. Result has 83 places, 61 transitions, 403 flow [2024-12-02 11:22:34,567 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=403, PETRI_PLACES=83, PETRI_TRANSITIONS=61} [2024-12-02 11:22:34,568 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 37 predicate places. [2024-12-02 11:22:34,568 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 61 transitions, 403 flow [2024-12-02 11:22:34,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.9) internal successors, (218), 20 states have internal predecessors, (218), 0 states have call successors, (0), 0 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 11:22:34,568 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:22:34,568 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:22:34,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 11:22:34,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-12-02 11:22:34,769 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:22:34,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:22:34,769 INFO L85 PathProgramCache]: Analyzing trace with hash 415658053, now seen corresponding path program 2 times [2024-12-02 11:22:34,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:22:34,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804451802] [2024-12-02 11:22:34,769 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 11:22:34,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:22:34,781 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 11:22:34,781 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:22:34,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 11:22:34,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:22:34,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804451802] [2024-12-02 11:22:34,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804451802] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:22:34,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820760649] [2024-12-02 11:22:34,945 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 11:22:34,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:22:34,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:22:34,947 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:22:34,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 11:22:35,016 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 11:22:35,016 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:22:35,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-12-02 11:22:35,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:22:35,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:22:35,148 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:22:35,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-12-02 11:22:35,308 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:22:35,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820760649] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:22:35,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:22:35,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-12-02 11:22:35,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415270960] [2024-12-02 11:22:35,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:22:35,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-12-02 11:22:35,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:22:35,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-12-02 11:22:35,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-12-02 11:22:35,460 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-12-02 11:22:35,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 61 transitions, 403 flow. Second operand has 20 states, 20 states have (on average 11.2) internal successors, (224), 20 states have internal predecessors, (224), 0 states have call successors, (0), 0 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 11:22:35,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:22:35,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-12-02 11:22:35,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:22:36,505 INFO L124 PetriNetUnfolderBase]: 3521/4979 cut-off events. [2024-12-02 11:22:36,505 INFO L125 PetriNetUnfolderBase]: For 16380/17123 co-relation queries the response was YES. [2024-12-02 11:22:36,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19477 conditions, 4979 events. 3521/4979 cut-off events. For 16380/17123 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 22652 event pairs, 544 based on Foata normal form. 168/5143 useless extension candidates. Maximal degree in co-relation 13684. Up to 912 conditions per place. [2024-12-02 11:22:36,521 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 167 selfloop transitions, 21 changer transitions 0/193 dead transitions. [2024-12-02 11:22:36,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 193 transitions, 1515 flow [2024-12-02 11:22:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 11:22:36,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-12-02 11:22:36,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 277 transitions. [2024-12-02 11:22:36,523 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4496753246753247 [2024-12-02 11:22:36,523 INFO L175 Difference]: Start difference. First operand has 83 places, 61 transitions, 403 flow. Second operand 14 states and 277 transitions. [2024-12-02 11:22:36,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 193 transitions, 1515 flow [2024-12-02 11:22:36,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 193 transitions, 1327 flow, removed 38 selfloop flow, removed 10 redundant places. [2024-12-02 11:22:36,541 INFO L231 Difference]: Finished difference. Result has 87 places, 64 transitions, 418 flow [2024-12-02 11:22:36,541 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=418, PETRI_PLACES=87, PETRI_TRANSITIONS=64} [2024-12-02 11:22:36,541 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 41 predicate places. [2024-12-02 11:22:36,541 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 64 transitions, 418 flow [2024-12-02 11:22:36,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.2) internal successors, (224), 20 states have internal predecessors, (224), 0 states have call successors, (0), 0 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 11:22:36,541 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:22:36,541 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:22:36,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 11:22:36,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-12-02 11:22:36,742 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:22:36,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:22:36,742 INFO L85 PathProgramCache]: Analyzing trace with hash -480796997, now seen corresponding path program 1 times [2024-12-02 11:22:36,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:22:36,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652054591] [2024-12-02 11:22:36,743 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:22:36,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:22:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:22:36,768 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 11:22:36,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:22:36,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652054591] [2024-12-02 11:22:36,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652054591] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:22:36,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:22:36,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 11:22:36,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350736967] [2024-12-02 11:22:36,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:22:36,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 11:22:36,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:22:36,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 11:22:36,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 11:22:36,769 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-12-02 11:22:36,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 64 transitions, 418 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:22:36,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:22:36,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-12-02 11:22:36,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:22:37,129 INFO L124 PetriNetUnfolderBase]: 3013/4554 cut-off events. [2024-12-02 11:22:37,130 INFO L125 PetriNetUnfolderBase]: For 15577/16254 co-relation queries the response was YES. [2024-12-02 11:22:37,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17750 conditions, 4554 events. 3013/4554 cut-off events. For 15577/16254 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 22024 event pairs, 715 based on Foata normal form. 3/4538 useless extension candidates. Maximal degree in co-relation 11955. Up to 3581 conditions per place. [2024-12-02 11:22:37,153 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 65 selfloop transitions, 4 changer transitions 8/85 dead transitions. [2024-12-02 11:22:37,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 85 transitions, 695 flow [2024-12-02 11:22:37,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 11:22:37,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 11:22:37,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-12-02 11:22:37,154 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-12-02 11:22:37,154 INFO L175 Difference]: Start difference. First operand has 87 places, 64 transitions, 418 flow. Second operand 3 states and 74 transitions. [2024-12-02 11:22:37,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 85 transitions, 695 flow [2024-12-02 11:22:37,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 85 transitions, 618 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-12-02 11:22:37,171 INFO L231 Difference]: Finished difference. Result has 80 places, 60 transitions, 334 flow [2024-12-02 11:22:37,171 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=334, PETRI_PLACES=80, PETRI_TRANSITIONS=60} [2024-12-02 11:22:37,172 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 34 predicate places. [2024-12-02 11:22:37,172 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 60 transitions, 334 flow [2024-12-02 11:22:37,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:22:37,172 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:22:37,172 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:22:37,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-12-02 11:22:37,172 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:22:37,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:22:37,173 INFO L85 PathProgramCache]: Analyzing trace with hash 316762409, now seen corresponding path program 1 times [2024-12-02 11:22:37,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:22:37,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814275900] [2024-12-02 11:22:37,173 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:22:37,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:22:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:22:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:22:37,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:22:37,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814275900] [2024-12-02 11:22:37,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814275900] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:22:37,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263673643] [2024-12-02 11:22:37,250 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:22:37,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:22:37,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:22:37,252 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:22:37,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 11:22:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:22:37,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 11:22:37,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:22:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:22:37,351 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:22:37,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:22:37,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263673643] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 11:22:37,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 11:22:37,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-12-02 11:22:37,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214402213] [2024-12-02 11:22:37,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:22:37,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 11:22:37,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:22:37,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 11:22:37,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-12-02 11:22:37,385 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-12-02 11:22:37,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 60 transitions, 334 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 11:22:37,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:22:37,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-12-02 11:22:37,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:22:37,738 INFO L124 PetriNetUnfolderBase]: 3449/4975 cut-off events. [2024-12-02 11:22:37,738 INFO L125 PetriNetUnfolderBase]: For 12510/13086 co-relation queries the response was YES. [2024-12-02 11:22:37,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18357 conditions, 4975 events. 3449/4975 cut-off events. For 12510/13086 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 24059 event pairs, 906 based on Foata normal form. 166/5034 useless extension candidates. Maximal degree in co-relation 13798. Up to 2830 conditions per place. [2024-12-02 11:22:37,753 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 68 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2024-12-02 11:22:37,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 83 transitions, 613 flow [2024-12-02 11:22:37,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 11:22:37,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 11:22:37,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-12-02 11:22:37,754 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-12-02 11:22:37,754 INFO L175 Difference]: Start difference. First operand has 80 places, 60 transitions, 334 flow. Second operand 5 states and 88 transitions. [2024-12-02 11:22:37,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 83 transitions, 613 flow [2024-12-02 11:22:37,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 83 transitions, 555 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-12-02 11:22:37,769 INFO L231 Difference]: Finished difference. Result has 72 places, 59 transitions, 316 flow [2024-12-02 11:22:37,769 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=316, PETRI_PLACES=72, PETRI_TRANSITIONS=59} [2024-12-02 11:22:37,769 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 26 predicate places. [2024-12-02 11:22:37,769 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 59 transitions, 316 flow [2024-12-02 11:22:37,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 11:22:37,769 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:22:37,769 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:22:37,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 11:22:37,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-12-02 11:22:37,970 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:22:37,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:22:37,970 INFO L85 PathProgramCache]: Analyzing trace with hash -387099273, now seen corresponding path program 1 times [2024-12-02 11:22:37,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:22:37,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480001433] [2024-12-02 11:22:37,971 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:22:37,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:22:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:22:38,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:22:38,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:22:38,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480001433] [2024-12-02 11:22:38,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480001433] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:22:38,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375987354] [2024-12-02 11:22:38,063 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:22:38,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:22:38,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:22:38,065 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:22:38,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 11:22:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:22:38,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 11:22:38,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:22:38,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:22:38,216 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:22:38,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:22:38,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375987354] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 11:22:38,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 11:22:38,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-12-02 11:22:38,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125364425] [2024-12-02 11:22:38,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:22:38,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 11:22:38,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:22:38,269 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 11:22:38,269 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-12-02 11:22:38,286 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-12-02 11:22:38,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 59 transitions, 316 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:22:38,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:22:38,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-12-02 11:22:38,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:22:38,821 INFO L124 PetriNetUnfolderBase]: 4417/6333 cut-off events. [2024-12-02 11:22:38,821 INFO L125 PetriNetUnfolderBase]: For 15960/16078 co-relation queries the response was YES. [2024-12-02 11:22:38,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21887 conditions, 6333 events. 4417/6333 cut-off events. For 15960/16078 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 31528 event pairs, 1172 based on Foata normal form. 0/5905 useless extension candidates. Maximal degree in co-relation 16379. Up to 2406 conditions per place. [2024-12-02 11:22:38,840 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 144 selfloop transitions, 21 changer transitions 0/170 dead transitions. [2024-12-02 11:22:38,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 170 transitions, 1316 flow [2024-12-02 11:22:38,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 11:22:38,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-12-02 11:22:38,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-12-02 11:22:38,841 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-12-02 11:22:38,841 INFO L175 Difference]: Start difference. First operand has 72 places, 59 transitions, 316 flow. Second operand 9 states and 165 transitions. [2024-12-02 11:22:38,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 170 transitions, 1316 flow [2024-12-02 11:22:38,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 170 transitions, 1269 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-12-02 11:22:38,850 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 408 flow [2024-12-02 11:22:38,850 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=408, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2024-12-02 11:22:38,850 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 33 predicate places. [2024-12-02 11:22:38,850 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 408 flow [2024-12-02 11:22:38,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:22:38,851 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:22:38,851 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:22:38,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 11:22:39,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-12-02 11:22:39,051 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:22:39,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:22:39,051 INFO L85 PathProgramCache]: Analyzing trace with hash -482899191, now seen corresponding path program 2 times [2024-12-02 11:22:39,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:22:39,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701466987] [2024-12-02 11:22:39,052 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 11:22:39,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:22:39,057 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 11:22:39,057 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:22:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 11:22:39,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:22:39,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701466987] [2024-12-02 11:22:39,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701466987] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:22:39,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:22:39,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 11:22:39,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903977779] [2024-12-02 11:22:39,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:22:39,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 11:22:39,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:22:39,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 11:22:39,100 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-12-02 11:22:39,107 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2024-12-02 11:22:39,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 408 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 11:22:39,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:22:39,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2024-12-02 11:22:39,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:22:40,309 INFO L124 PetriNetUnfolderBase]: 8880/12569 cut-off events. [2024-12-02 11:22:40,309 INFO L125 PetriNetUnfolderBase]: For 29059/29059 co-relation queries the response was YES. [2024-12-02 11:22:40,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46419 conditions, 12569 events. 8880/12569 cut-off events. For 29059/29059 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 63702 event pairs, 479 based on Foata normal form. 28/12384 useless extension candidates. Maximal degree in co-relation 36092. Up to 2968 conditions per place. [2024-12-02 11:22:40,350 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 308 selfloop transitions, 118 changer transitions 0/427 dead transitions. [2024-12-02 11:22:40,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 427 transitions, 3350 flow [2024-12-02 11:22:40,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 11:22:40,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-12-02 11:22:40,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 305 transitions. [2024-12-02 11:22:40,352 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4077540106951872 [2024-12-02 11:22:40,352 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 408 flow. Second operand 17 states and 305 transitions. [2024-12-02 11:22:40,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 427 transitions, 3350 flow [2024-12-02 11:22:40,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 427 transitions, 3347 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 11:22:40,388 INFO L231 Difference]: Finished difference. Result has 105 places, 177 transitions, 1591 flow [2024-12-02 11:22:40,388 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1591, PETRI_PLACES=105, PETRI_TRANSITIONS=177} [2024-12-02 11:22:40,388 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 59 predicate places. [2024-12-02 11:22:40,388 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 177 transitions, 1591 flow [2024-12-02 11:22:40,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 11:22:40,389 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:22:40,389 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:22:40,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-12-02 11:22:40,389 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:22:40,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:22:40,389 INFO L85 PathProgramCache]: Analyzing trace with hash 283446195, now seen corresponding path program 3 times [2024-12-02 11:22:40,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:22:40,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36423874] [2024-12-02 11:22:40,389 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 11:22:40,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:22:40,397 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 11:22:40,397 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:22:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 11:22:40,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:22:40,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36423874] [2024-12-02 11:22:40,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36423874] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:22:40,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:22:40,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 11:22:40,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790166940] [2024-12-02 11:22:40,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:22:40,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 11:22:40,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:22:40,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 11:22:40,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-12-02 11:22:40,451 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2024-12-02 11:22:40,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 177 transitions, 1591 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 11:22:40,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:22:40,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2024-12-02 11:22:40,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:22:41,831 INFO L124 PetriNetUnfolderBase]: 11076/15629 cut-off events. [2024-12-02 11:22:41,832 INFO L125 PetriNetUnfolderBase]: For 72880/72880 co-relation queries the response was YES. [2024-12-02 11:22:41,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71348 conditions, 15629 events. 11076/15629 cut-off events. For 72880/72880 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 81291 event pairs, 4198 based on Foata normal form. 4/15633 useless extension candidates. Maximal degree in co-relation 62126. Up to 9120 conditions per place. [2024-12-02 11:22:41,976 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 279 selfloop transitions, 89 changer transitions 3/372 dead transitions. [2024-12-02 11:22:41,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 372 transitions, 4035 flow [2024-12-02 11:22:41,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 11:22:41,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 11:22:41,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-12-02 11:22:41,978 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4383116883116883 [2024-12-02 11:22:41,978 INFO L175 Difference]: Start difference. First operand has 105 places, 177 transitions, 1591 flow. Second operand 7 states and 135 transitions. [2024-12-02 11:22:41,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 372 transitions, 4035 flow [2024-12-02 11:22:42,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 372 transitions, 3945 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-12-02 11:22:42,442 INFO L231 Difference]: Finished difference. Result has 115 places, 226 transitions, 2411 flow [2024-12-02 11:22:42,442 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1560, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2411, PETRI_PLACES=115, PETRI_TRANSITIONS=226} [2024-12-02 11:22:42,442 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 69 predicate places. [2024-12-02 11:22:42,442 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 226 transitions, 2411 flow [2024-12-02 11:22:42,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 11:22:42,442 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:22:42,443 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:22:42,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-12-02 11:22:42,443 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:22:42,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:22:42,443 INFO L85 PathProgramCache]: Analyzing trace with hash -496933285, now seen corresponding path program 4 times [2024-12-02 11:22:42,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:22:42,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741878140] [2024-12-02 11:22:42,443 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 11:22:42,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:22:42,453 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 11:22:42,453 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:22:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 11:22:42,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:22:42,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741878140] [2024-12-02 11:22:42,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741878140] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:22:42,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:22:42,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 11:22:42,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602312561] [2024-12-02 11:22:42,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:22:42,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 11:22:42,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:22:42,501 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 11:22:42,501 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-12-02 11:22:42,514 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2024-12-02 11:22:42,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 226 transitions, 2411 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 11:22:42,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:22:42,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2024-12-02 11:22:42,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:22:45,818 INFO L124 PetriNetUnfolderBase]: 21414/29774 cut-off events. [2024-12-02 11:22:45,818 INFO L125 PetriNetUnfolderBase]: For 184770/184770 co-relation queries the response was YES. [2024-12-02 11:22:45,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144617 conditions, 29774 events. 21414/29774 cut-off events. For 184770/184770 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 164795 event pairs, 1483 based on Foata normal form. 44/29818 useless extension candidates. Maximal degree in co-relation 129496. Up to 7461 conditions per place. [2024-12-02 11:22:45,988 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 497 selfloop transitions, 355 changer transitions 0/853 dead transitions. [2024-12-02 11:22:45,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 853 transitions, 10292 flow [2024-12-02 11:22:45,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 11:22:45,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-12-02 11:22:45,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 324 transitions. [2024-12-02 11:22:45,990 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-12-02 11:22:45,990 INFO L175 Difference]: Start difference. First operand has 115 places, 226 transitions, 2411 flow. Second operand 18 states and 324 transitions. [2024-12-02 11:22:45,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 853 transitions, 10292 flow [2024-12-02 11:22:47,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 853 transitions, 9999 flow, removed 51 selfloop flow, removed 2 redundant places. [2024-12-02 11:22:47,533 INFO L231 Difference]: Finished difference. Result has 145 places, 529 transitions, 7243 flow [2024-12-02 11:22:47,534 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2316, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7243, PETRI_PLACES=145, PETRI_TRANSITIONS=529} [2024-12-02 11:22:47,534 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 99 predicate places. [2024-12-02 11:22:47,534 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 529 transitions, 7243 flow [2024-12-02 11:22:47,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 11:22:47,534 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:22:47,534 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:22:47,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-12-02 11:22:47,534 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:22:47,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:22:47,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1720850023, now seen corresponding path program 5 times [2024-12-02 11:22:47,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:22:47,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29868401] [2024-12-02 11:22:47,535 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 11:22:47,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:22:47,545 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-12-02 11:22:47,546 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:22:47,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:22:47,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:22:47,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29868401] [2024-12-02 11:22:47,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29868401] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:22:47,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441500829] [2024-12-02 11:22:47,612 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 11:22:47,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:22:47,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:22:47,614 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:22:47,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 11:22:47,696 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-12-02 11:22:47,696 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:22:47,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 11:22:47,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:22:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:22:47,784 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:22:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:22:47,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441500829] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 11:22:47,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 11:22:47,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-12-02 11:22:47,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245393139] [2024-12-02 11:22:47,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:22:47,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 11:22:47,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:22:47,851 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 11:22:47,851 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-12-02 11:22:47,862 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-12-02 11:22:47,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 529 transitions, 7243 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:22:47,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:22:47,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-12-02 11:22:47,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:22:52,941 INFO L124 PetriNetUnfolderBase]: 23272/33259 cut-off events. [2024-12-02 11:22:52,941 INFO L125 PetriNetUnfolderBase]: For 326131/326916 co-relation queries the response was YES. [2024-12-02 11:22:53,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188645 conditions, 33259 events. 23272/33259 cut-off events. For 326131/326916 co-relation queries the response was YES. Maximal size of possible extension queue 931. Compared 202823 event pairs, 3159 based on Foata normal form. 254/33291 useless extension candidates. Maximal degree in co-relation 180594. Up to 15636 conditions per place. [2024-12-02 11:22:53,230 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 538 selfloop transitions, 273 changer transitions 0/834 dead transitions. [2024-12-02 11:22:53,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 834 transitions, 12467 flow [2024-12-02 11:22:53,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 11:22:53,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 11:22:53,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-12-02 11:22:53,231 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-12-02 11:22:53,231 INFO L175 Difference]: Start difference. First operand has 145 places, 529 transitions, 7243 flow. Second operand 8 states and 150 transitions. [2024-12-02 11:22:53,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 834 transitions, 12467 flow [2024-12-02 11:22:59,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 834 transitions, 12065 flow, removed 201 selfloop flow, removed 0 redundant places. [2024-12-02 11:22:59,528 INFO L231 Difference]: Finished difference. Result has 157 places, 651 transitions, 9739 flow [2024-12-02 11:22:59,529 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6921, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9739, PETRI_PLACES=157, PETRI_TRANSITIONS=651} [2024-12-02 11:22:59,529 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 111 predicate places. [2024-12-02 11:22:59,529 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 651 transitions, 9739 flow [2024-12-02 11:22:59,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:22:59,529 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:22:59,529 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:22:59,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 11:22:59,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-12-02 11:22:59,729 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:22:59,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:22:59,730 INFO L85 PathProgramCache]: Analyzing trace with hash 527922367, now seen corresponding path program 6 times [2024-12-02 11:22:59,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:22:59,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947622571] [2024-12-02 11:22:59,730 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 11:22:59,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:22:59,735 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-12-02 11:22:59,736 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:22:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 11:22:59,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:22:59,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947622571] [2024-12-02 11:22:59,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947622571] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:22:59,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:22:59,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 11:22:59,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912571217] [2024-12-02 11:22:59,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:22:59,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 11:22:59,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:22:59,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 11:22:59,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-12-02 11:22:59,784 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2024-12-02 11:22:59,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 651 transitions, 9739 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 11:22:59,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:22:59,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2024-12-02 11:22:59,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:23:07,463 INFO L124 PetriNetUnfolderBase]: 32010/44515 cut-off events. [2024-12-02 11:23:07,463 INFO L125 PetriNetUnfolderBase]: For 494478/494478 co-relation queries the response was YES. [2024-12-02 11:23:07,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268259 conditions, 44515 events. 32010/44515 cut-off events. For 494478/494478 co-relation queries the response was YES. Maximal size of possible extension queue 1117. Compared 260171 event pairs, 3226 based on Foata normal form. 44/44559 useless extension candidates. Maximal degree in co-relation 257112. Up to 13143 conditions per place. [2024-12-02 11:23:07,989 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 578 selfloop transitions, 636 changer transitions 1/1216 dead transitions. [2024-12-02 11:23:07,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 1216 transitions, 19092 flow [2024-12-02 11:23:07,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-12-02 11:23:07,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-12-02 11:23:07,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 367 transitions. [2024-12-02 11:23:07,991 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3971861471861472 [2024-12-02 11:23:07,991 INFO L175 Difference]: Start difference. First operand has 157 places, 651 transitions, 9739 flow. Second operand 21 states and 367 transitions. [2024-12-02 11:23:07,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 1216 transitions, 19092 flow [2024-12-02 11:23:15,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 1216 transitions, 18887 flow, removed 101 selfloop flow, removed 2 redundant places. [2024-12-02 11:23:15,708 INFO L231 Difference]: Finished difference. Result has 187 places, 943 transitions, 16441 flow [2024-12-02 11:23:15,709 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9566, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=16441, PETRI_PLACES=187, PETRI_TRANSITIONS=943} [2024-12-02 11:23:15,709 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 141 predicate places. [2024-12-02 11:23:15,709 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 943 transitions, 16441 flow [2024-12-02 11:23:15,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 11:23:15,709 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:23:15,709 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:23:15,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-12-02 11:23:15,709 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:23:15,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:23:15,709 INFO L85 PathProgramCache]: Analyzing trace with hash 880782853, now seen corresponding path program 7 times [2024-12-02 11:23:15,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:23:15,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565257098] [2024-12-02 11:23:15,710 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 11:23:15,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:23:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:23:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:23:15,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:23:15,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565257098] [2024-12-02 11:23:15,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565257098] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:23:15,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82551322] [2024-12-02 11:23:15,787 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 11:23:15,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:23:15,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:23:15,789 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:23:15,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 11:23:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:23:15,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 11:23:15,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:23:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:23:15,994 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:23:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:23:16,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82551322] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 11:23:16,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 11:23:16,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-12-02 11:23:16,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723122534] [2024-12-02 11:23:16,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:23:16,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 11:23:16,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:23:16,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 11:23:16,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-12-02 11:23:16,060 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-12-02 11:23:16,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 943 transitions, 16441 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:23:16,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:23:16,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-12-02 11:23:16,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:23:24,946 INFO L124 PetriNetUnfolderBase]: 31521/44534 cut-off events. [2024-12-02 11:23:24,946 INFO L125 PetriNetUnfolderBase]: For 647498/648773 co-relation queries the response was YES. [2024-12-02 11:23:25,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291541 conditions, 44534 events. 31521/44534 cut-off events. For 647498/648773 co-relation queries the response was YES. Maximal size of possible extension queue 1273. Compared 275974 event pairs, 4144 based on Foata normal form. 536/44835 useless extension candidates. Maximal degree in co-relation 283365. Up to 15264 conditions per place. [2024-12-02 11:23:25,389 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 681 selfloop transitions, 655 changer transitions 0/1365 dead transitions. [2024-12-02 11:23:25,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 1365 transitions, 25556 flow [2024-12-02 11:23:25,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 11:23:25,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-12-02 11:23:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-12-02 11:23:25,390 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-12-02 11:23:25,390 INFO L175 Difference]: Start difference. First operand has 187 places, 943 transitions, 16441 flow. Second operand 9 states and 175 transitions. [2024-12-02 11:23:25,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 1365 transitions, 25556 flow [2024-12-02 11:23:40,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 1365 transitions, 25112 flow, removed 222 selfloop flow, removed 0 redundant places. [2024-12-02 11:23:40,506 INFO L231 Difference]: Finished difference. Result has 199 places, 1121 transitions, 21507 flow [2024-12-02 11:23:40,506 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16137, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=481, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21507, PETRI_PLACES=199, PETRI_TRANSITIONS=1121} [2024-12-02 11:23:40,506 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 153 predicate places. [2024-12-02 11:23:40,506 INFO L471 AbstractCegarLoop]: Abstraction has has 199 places, 1121 transitions, 21507 flow [2024-12-02 11:23:40,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:23:40,507 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:23:40,507 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:23:40,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 11:23:40,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-12-02 11:23:40,707 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:23:40,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:23:40,707 INFO L85 PathProgramCache]: Analyzing trace with hash 854666707, now seen corresponding path program 8 times [2024-12-02 11:23:40,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:23:40,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35092875] [2024-12-02 11:23:40,708 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 11:23:40,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:23:40,713 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 11:23:40,713 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:23:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 11:23:40,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:23:40,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35092875] [2024-12-02 11:23:40,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35092875] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:23:40,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:23:40,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 11:23:40,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108129016] [2024-12-02 11:23:40,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:23:40,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 11:23:40,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:23:40,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 11:23:40,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-12-02 11:23:40,753 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2024-12-02 11:23:40,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 1121 transitions, 21507 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 11:23:40,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:23:40,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2024-12-02 11:23:40,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:23:53,464 INFO L124 PetriNetUnfolderBase]: 40334/56210 cut-off events. [2024-12-02 11:23:53,464 INFO L125 PetriNetUnfolderBase]: For 989547/989547 co-relation queries the response was YES. [2024-12-02 11:23:53,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387693 conditions, 56210 events. 40334/56210 cut-off events. For 989547/989547 co-relation queries the response was YES. Maximal size of possible extension queue 1406. Compared 341019 event pairs, 5444 based on Foata normal form. 41/56251 useless extension candidates. Maximal degree in co-relation 381486. Up to 16680 conditions per place. [2024-12-02 11:23:54,164 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 724 selfloop transitions, 928 changer transitions 0/1653 dead transitions. [2024-12-02 11:23:54,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 1653 transitions, 33576 flow [2024-12-02 11:23:54,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 11:23:54,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 11:23:54,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-12-02 11:23:54,165 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4194214876033058 [2024-12-02 11:23:54,165 INFO L175 Difference]: Start difference. First operand has 199 places, 1121 transitions, 21507 flow. Second operand 11 states and 203 transitions. [2024-12-02 11:23:54,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 1653 transitions, 33576 flow [2024-12-02 11:24:15,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 1653 transitions, 32906 flow, removed 230 selfloop flow, removed 3 redundant places. [2024-12-02 11:24:15,992 INFO L231 Difference]: Finished difference. Result has 214 places, 1397 transitions, 29795 flow [2024-12-02 11:24:15,993 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=21075, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=656, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=29795, PETRI_PLACES=214, PETRI_TRANSITIONS=1397} [2024-12-02 11:24:15,993 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 168 predicate places. [2024-12-02 11:24:15,993 INFO L471 AbstractCegarLoop]: Abstraction has has 214 places, 1397 transitions, 29795 flow [2024-12-02 11:24:15,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 11:24:15,993 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:24:15,994 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:24:15,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-12-02 11:24:15,994 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:24:15,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:24:15,994 INFO L85 PathProgramCache]: Analyzing trace with hash 81799911, now seen corresponding path program 9 times [2024-12-02 11:24:15,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:24:15,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077045467] [2024-12-02 11:24:15,995 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 11:24:15,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:24:16,002 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 11:24:16,002 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:24:16,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 11:24:16,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:24:16,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077045467] [2024-12-02 11:24:16,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077045467] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:24:16,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215111192] [2024-12-02 11:24:16,055 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 11:24:16,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:24:16,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:24:16,057 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:24:16,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 11:24:16,128 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 11:24:16,128 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:24:16,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 11:24:16,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:24:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 11:24:16,199 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:24:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 11:24:16,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215111192] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:24:16,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:24:16,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-12-02 11:24:16,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396193966] [2024-12-02 11:24:16,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:24:16,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 11:24:16,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:24:16,240 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 11:24:16,240 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-12-02 11:24:16,251 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2024-12-02 11:24:16,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 1397 transitions, 29795 flow. Second operand has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 11:24:16,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:24:16,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2024-12-02 11:24:16,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:24:35,727 INFO L124 PetriNetUnfolderBase]: 52310/72650 cut-off events. [2024-12-02 11:24:35,727 INFO L125 PetriNetUnfolderBase]: For 1552348/1552348 co-relation queries the response was YES. [2024-12-02 11:24:36,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543588 conditions, 72650 events. 52310/72650 cut-off events. For 1552348/1552348 co-relation queries the response was YES. Maximal size of possible extension queue 1895. Compared 454103 event pairs, 3067 based on Foata normal form. 44/72694 useless extension candidates. Maximal degree in co-relation 540438. Up to 14476 conditions per place. [2024-12-02 11:24:36,583 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 700 selfloop transitions, 1754 changer transitions 0/2455 dead transitions. [2024-12-02 11:24:36,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 2455 transitions, 53458 flow [2024-12-02 11:24:36,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-12-02 11:24:36,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-12-02 11:24:36,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 472 transitions. [2024-12-02 11:24:36,584 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39730639730639733 [2024-12-02 11:24:36,584 INFO L175 Difference]: Start difference. First operand has 214 places, 1397 transitions, 29795 flow. Second operand 27 states and 472 transitions. [2024-12-02 11:24:36,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 2455 transitions, 53458 flow [2024-12-02 11:25:41,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 2455 transitions, 52122 flow, removed 448 selfloop flow, removed 1 redundant places. [2024-12-02 11:25:41,726 INFO L231 Difference]: Finished difference. Result has 259 places, 2107 transitions, 50716 flow [2024-12-02 11:25:41,727 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=28907, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1079, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=50716, PETRI_PLACES=259, PETRI_TRANSITIONS=2107} [2024-12-02 11:25:41,727 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 213 predicate places. [2024-12-02 11:25:41,727 INFO L471 AbstractCegarLoop]: Abstraction has has 259 places, 2107 transitions, 50716 flow [2024-12-02 11:25:41,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 11:25:41,727 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:25:41,727 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:25:41,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-12-02 11:25:41,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-12-02 11:25:41,929 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:25:41,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:25:41,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1006118533, now seen corresponding path program 10 times [2024-12-02 11:25:41,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:25:41,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701537677] [2024-12-02 11:25:41,930 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 11:25:41,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:25:41,935 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 11:25:41,935 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:25:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 11:25:41,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:25:41,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701537677] [2024-12-02 11:25:41,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701537677] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:25:41,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495178845] [2024-12-02 11:25:41,966 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 11:25:41,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:25:41,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:25:41,967 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:25:41,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 11:25:42,024 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 11:25:42,024 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:25:42,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 11:25:42,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:25:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 11:25:42,090 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:25:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 11:25:42,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495178845] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:25:42,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:25:42,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-12-02 11:25:42,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426218662] [2024-12-02 11:25:42,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:25:42,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 11:25:42,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:25:42,149 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 11:25:42,149 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-12-02 11:25:42,158 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2024-12-02 11:25:42,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 2107 transitions, 50716 flow. Second operand has 14 states, 14 states have (on average 9.714285714285714) internal successors, (136), 14 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:25:42,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:25:42,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2024-12-02 11:25:42,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:26:19,080 INFO L124 PetriNetUnfolderBase]: 60555/84807 cut-off events. [2024-12-02 11:26:19,080 INFO L125 PetriNetUnfolderBase]: For 2256135/2256135 co-relation queries the response was YES. [2024-12-02 11:26:20,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 686918 conditions, 84807 events. 60555/84807 cut-off events. For 2256135/2256135 co-relation queries the response was YES. Maximal size of possible extension queue 2278. Compared 551632 event pairs, 4618 based on Foata normal form. 30/84837 useless extension candidates. Maximal degree in co-relation 685201. Up to 15314 conditions per place. [2024-12-02 11:26:20,588 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 940 selfloop transitions, 2317 changer transitions 1/3259 dead transitions. [2024-12-02 11:26:20,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 3259 transitions, 78535 flow [2024-12-02 11:26:20,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-12-02 11:26:20,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-12-02 11:26:20,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 644 transitions. [2024-12-02 11:26:20,590 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38516746411483255 [2024-12-02 11:26:20,590 INFO L175 Difference]: Start difference. First operand has 259 places, 2107 transitions, 50716 flow. Second operand 38 states and 644 transitions. [2024-12-02 11:26:20,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 3259 transitions, 78535 flow [2024-12-02 11:28:28,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 3259 transitions, 77505 flow, removed 515 selfloop flow, removed 0 redundant places. [2024-12-02 11:28:28,525 INFO L231 Difference]: Finished difference. Result has 318 places, 2730 transitions, 72532 flow [2024-12-02 11:28:28,527 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=49958, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1718, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=72532, PETRI_PLACES=318, PETRI_TRANSITIONS=2730} [2024-12-02 11:28:28,527 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 272 predicate places. [2024-12-02 11:28:28,527 INFO L471 AbstractCegarLoop]: Abstraction has has 318 places, 2730 transitions, 72532 flow [2024-12-02 11:28:28,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.714285714285714) internal successors, (136), 14 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:28:28,527 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:28:28,527 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:28:28,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-12-02 11:28:28,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-12-02 11:28:28,728 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:28:28,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:28:28,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1335329463, now seen corresponding path program 11 times [2024-12-02 11:28:28,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:28:28,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417386640] [2024-12-02 11:28:28,729 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 11:28:28,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:28:28,741 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-12-02 11:28:28,741 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:28:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:28:28,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:28:28,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417386640] [2024-12-02 11:28:28,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417386640] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:28:28,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122945715] [2024-12-02 11:28:28,804 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 11:28:28,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:28:28,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:28:28,806 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:28:28,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 11:28:28,895 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-12-02 11:28:28,895 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:28:28,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 11:28:28,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:28:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:28:28,962 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:28:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:28:29,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122945715] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 11:28:29,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 11:28:29,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-12-02 11:28:29,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687104369] [2024-12-02 11:28:29,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:28:29,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 11:28:29,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:28:29,021 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 11:28:29,021 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-12-02 11:28:29,036 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-12-02 11:28:29,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 2730 transitions, 72532 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:28:29,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:28:29,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-12-02 11:28:29,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:29:14,909 INFO L124 PetriNetUnfolderBase]: 54788/77852 cut-off events. [2024-12-02 11:29:14,910 INFO L125 PetriNetUnfolderBase]: For 2413155/2415170 co-relation queries the response was YES. [2024-12-02 11:29:16,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675322 conditions, 77852 events. 54788/77852 cut-off events. For 2413155/2415170 co-relation queries the response was YES. Maximal size of possible extension queue 2347. Compared 526572 event pairs, 5867 based on Foata normal form. 596/77824 useless extension candidates. Maximal degree in co-relation 673946. Up to 21948 conditions per place. [2024-12-02 11:29:16,471 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 1236 selfloop transitions, 1592 changer transitions 0/2915 dead transitions. [2024-12-02 11:29:16,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 2915 transitions, 81190 flow [2024-12-02 11:29:16,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 11:29:16,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-12-02 11:29:16,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-12-02 11:29:16,473 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-12-02 11:29:16,473 INFO L175 Difference]: Start difference. First operand has 318 places, 2730 transitions, 72532 flow. Second operand 9 states and 170 transitions. [2024-12-02 11:29:16,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 2915 transitions, 81190 flow [2024-12-02 11:31:37,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 2915 transitions, 77171 flow, removed 555 selfloop flow, removed 8 redundant places. [2024-12-02 11:31:37,929 INFO L231 Difference]: Finished difference. Result has 317 places, 2720 transitions, 71463 flow [2024-12-02 11:31:37,931 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=68279, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1592, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=71463, PETRI_PLACES=317, PETRI_TRANSITIONS=2720} [2024-12-02 11:31:37,931 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 271 predicate places. [2024-12-02 11:31:37,931 INFO L471 AbstractCegarLoop]: Abstraction has has 317 places, 2720 transitions, 71463 flow [2024-12-02 11:31:37,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:31:37,931 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:31:37,931 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:31:37,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-12-02 11:31:38,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-12-02 11:31:38,132 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:31:38,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:31:38,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1867690177, now seen corresponding path program 12 times [2024-12-02 11:31:38,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:31:38,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809356151] [2024-12-02 11:31:38,133 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 11:31:38,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:31:38,141 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-12-02 11:31:38,141 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:31:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 11:31:38,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:31:38,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809356151] [2024-12-02 11:31:38,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809356151] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:31:38,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267216270] [2024-12-02 11:31:38,196 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 11:31:38,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:31:38,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:31:38,198 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:31:38,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 11:31:38,275 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-12-02 11:31:38,275 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:31:38,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 11:31:38,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:31:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:31:38,361 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:31:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:31:38,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267216270] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 11:31:38,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 11:31:38,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-12-02 11:31:38,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456955771] [2024-12-02 11:31:38,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:31:38,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 11:31:38,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:31:38,423 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 11:31:38,423 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-12-02 11:31:38,434 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-12-02 11:31:38,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 2720 transitions, 71463 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:31:38,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:31:38,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-12-02 11:31:38,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:32:23,585 INFO L124 PetriNetUnfolderBase]: 54923/78141 cut-off events. [2024-12-02 11:32:23,586 INFO L125 PetriNetUnfolderBase]: For 2318182/2320397 co-relation queries the response was YES. [2024-12-02 11:32:24,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 682203 conditions, 78141 events. 54923/78141 cut-off events. For 2318182/2320397 co-relation queries the response was YES. Maximal size of possible extension queue 2367. Compared 529784 event pairs, 5544 based on Foata normal form. 581/78132 useless extension candidates. Maximal degree in co-relation 681006. Up to 30324 conditions per place. [2024-12-02 11:32:25,074 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 1048 selfloop transitions, 1809 changer transitions 0/2944 dead transitions. [2024-12-02 11:32:25,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 2944 transitions, 81584 flow [2024-12-02 11:32:25,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 11:32:25,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-12-02 11:32:25,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-12-02 11:32:25,075 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2024-12-02 11:32:25,075 INFO L175 Difference]: Start difference. First operand has 317 places, 2720 transitions, 71463 flow. Second operand 9 states and 158 transitions. [2024-12-02 11:32:25,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 2944 transitions, 81584 flow [2024-12-02 11:34:11,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 2944 transitions, 80100 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-12-02 11:34:11,584 INFO L231 Difference]: Finished difference. Result has 323 places, 2763 transitions, 75382 flow [2024-12-02 11:34:11,586 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=69884, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1762, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=930, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=75382, PETRI_PLACES=323, PETRI_TRANSITIONS=2763} [2024-12-02 11:34:11,586 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 277 predicate places. [2024-12-02 11:34:11,586 INFO L471 AbstractCegarLoop]: Abstraction has has 323 places, 2763 transitions, 75382 flow [2024-12-02 11:34:11,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:34:11,587 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:34:11,587 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:34:11,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-12-02 11:34:11,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-12-02 11:34:11,787 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-12-02 11:34:11,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:34:11,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1483439483, now seen corresponding path program 13 times [2024-12-02 11:34:11,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:34:11,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102072762] [2024-12-02 11:34:11,788 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 11:34:11,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:34:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:34:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:34:11,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:34:11,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102072762] [2024-12-02 11:34:11,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102072762] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:34:11,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082223982] [2024-12-02 11:34:11,863 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 11:34:11,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:34:11,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:34:11,865 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:34:11,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d5516e2-8c78-486b-b18c-9a405a15187e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 11:34:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:34:11,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 11:34:11,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:34:11,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:34:11,993 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:34:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:34:12,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082223982] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 11:34:12,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 11:34:12,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-12-02 11:34:12,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298319677] [2024-12-02 11:34:12,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:34:12,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 11:34:12,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:34:12,061 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 11:34:12,061 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-12-02 11:34:12,078 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-12-02 11:34:12,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 2763 transitions, 75382 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:34:12,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:34:12,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-12-02 11:34:12,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:34:54,812 INFO L124 PetriNetUnfolderBase]: 54629/77829 cut-off events. [2024-12-02 11:34:54,812 INFO L125 PetriNetUnfolderBase]: For 2459787/2462036 co-relation queries the response was YES. [2024-12-02 11:34:56,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 693782 conditions, 77829 events. 54629/77829 cut-off events. For 2459787/2462036 co-relation queries the response was YES. Maximal size of possible extension queue 2358. Compared 528156 event pairs, 5185 based on Foata normal form. 640/77851 useless extension candidates. Maximal degree in co-relation 692179. Up to 36276 conditions per place. [2024-12-02 11:34:56,693 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 1073 selfloop transitions, 1788 changer transitions 0/2948 dead transitions. [2024-12-02 11:34:56,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 2948 transitions, 84400 flow [2024-12-02 11:34:56,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 11:34:56,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 11:34:56,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-12-02 11:34:56,694 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-12-02 11:34:56,694 INFO L175 Difference]: Start difference. First operand has 323 places, 2763 transitions, 75382 flow. Second operand 8 states and 146 transitions. [2024-12-02 11:34:56,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 2948 transitions, 84400 flow