./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-poker-hand-symm.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_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/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_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-poker-hand-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/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_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/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 6f8a234fc2a7dd634bd03f872a0d7e8707283ecf0f996c6ed729f53ab07d6660 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 07:28:41,847 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 07:28:41,901 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 07:28:41,906 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 07:28:41,906 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 07:28:41,927 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 07:28:41,927 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 07:28:41,928 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 07:28:41,928 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 07:28:41,928 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 07:28:41,928 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 07:28:41,928 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 07:28:41,928 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 07:28:41,929 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 07:28:41,929 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 07:28:41,929 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 07:28:41,929 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 07:28:41,929 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 07:28:41,929 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 07:28:41,929 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 07:28:41,929 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 07:28:41,929 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 07:28:41,929 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 07:28:41,929 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 07:28:41,929 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 07:28:41,930 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 07:28:41,930 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 07:28:41,930 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 07:28:41,930 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 07:28:41,930 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 07:28:41,930 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:28:41,930 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:28:41,930 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:28:41,930 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:28:41,930 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 07:28:41,930 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:28:41,930 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:28:41,930 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:28:41,930 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:28:41,931 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 07:28:41,931 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 07:28:41,931 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 07:28:41,931 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 07:28:41,931 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 07:28:41,931 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 07:28:41,931 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 07:28:41,931 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 07:28:41,931 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_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/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 -> 6f8a234fc2a7dd634bd03f872a0d7e8707283ecf0f996c6ed729f53ab07d6660 [2024-12-02 07:28:42,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 07:28:42,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 07:28:42,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 07:28:42,182 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 07:28:42,182 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 07:28:42,183 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/chl-poker-hand-symm.wvr.c [2024-12-02 07:28:44,799 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/data/7f3cc5b97/3ff8f61b9d1144efbb525556fe044d5f/FLAGb24cce772 [2024-12-02 07:28:45,030 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 07:28:45,031 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/sv-benchmarks/c/weaver/chl-poker-hand-symm.wvr.c [2024-12-02 07:28:45,039 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/data/7f3cc5b97/3ff8f61b9d1144efbb525556fe044d5f/FLAGb24cce772 [2024-12-02 07:28:45,056 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/data/7f3cc5b97/3ff8f61b9d1144efbb525556fe044d5f [2024-12-02 07:28:45,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 07:28:45,059 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 07:28:45,060 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 07:28:45,060 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 07:28:45,063 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 07:28:45,064 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:28:45" (1/1) ... [2024-12-02 07:28:45,065 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26059964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:45, skipping insertion in model container [2024-12-02 07:28:45,065 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:28:45" (1/1) ... [2024-12-02 07:28:45,082 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 07:28:45,283 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 07:28:45,286 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:28:45,294 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 07:28:45,354 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:28:45,369 INFO L204 MainTranslator]: Completed translation [2024-12-02 07:28:45,369 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:45 WrapperNode [2024-12-02 07:28:45,369 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 07:28:45,370 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 07:28:45,370 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 07:28:45,370 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 07:28:45,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:45" (1/1) ... [2024-12-02 07:28:45,392 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:45" (1/1) ... [2024-12-02 07:28:45,451 INFO L138 Inliner]: procedures = 24, calls = 298, calls flagged for inlining = 70, calls inlined = 98, statements flattened = 1549 [2024-12-02 07:28:45,451 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 07:28:45,452 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 07:28:45,452 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 07:28:45,452 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 07:28:45,458 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:45" (1/1) ... [2024-12-02 07:28:45,459 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:45" (1/1) ... [2024-12-02 07:28:45,467 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:45" (1/1) ... [2024-12-02 07:28:45,495 INFO L175 MemorySlicer]: Split 186 memory accesses to 2 slices as follows [2, 184]. 99 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 8 writes are split as follows [0, 8]. [2024-12-02 07:28:45,496 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:45" (1/1) ... [2024-12-02 07:28:45,496 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:45" (1/1) ... [2024-12-02 07:28:45,527 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:45" (1/1) ... [2024-12-02 07:28:45,530 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:45" (1/1) ... [2024-12-02 07:28:45,541 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:45" (1/1) ... [2024-12-02 07:28:45,545 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:45" (1/1) ... [2024-12-02 07:28:45,549 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:45" (1/1) ... [2024-12-02 07:28:45,558 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 07:28:45,559 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 07:28:45,559 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 07:28:45,559 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 07:28:45,560 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:45" (1/1) ... [2024-12-02 07:28:45,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:28:45,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:45,587 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 07:28:45,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 07:28:45,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 07:28:45,610 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 07:28:45,610 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 07:28:45,610 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 07:28:45,610 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 07:28:45,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 07:28:45,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 07:28:45,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 07:28:45,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 07:28:45,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-12-02 07:28:45,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-12-02 07:28:45,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 07:28:45,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 07:28:45,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 07:28:45,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 07:28:45,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 07:28:45,613 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 07:28:45,764 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 07:28:45,765 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 07:28:47,790 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 07:28:47,790 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 07:28:52,778 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 07:28:52,779 INFO L312 CfgBuilder]: Removed 12 assume(true) statements. [2024-12-02 07:28:52,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:28:52 BoogieIcfgContainer [2024-12-02 07:28:52,779 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 07:28:52,780 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 07:28:52,780 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 07:28:52,783 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 07:28:52,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:28:45" (1/3) ... [2024-12-02 07:28:52,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22a1b24b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:28:52, skipping insertion in model container [2024-12-02 07:28:52,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:45" (2/3) ... [2024-12-02 07:28:52,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22a1b24b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:28:52, skipping insertion in model container [2024-12-02 07:28:52,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:28:52" (3/3) ... [2024-12-02 07:28:52,785 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-poker-hand-symm.wvr.c [2024-12-02 07:28:52,800 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 07:28:52,801 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-poker-hand-symm.wvr.c that has 3 procedures, 445 locations, 1 initial locations, 12 loop locations, and 370 error locations. [2024-12-02 07:28:52,802 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 07:28:54,228 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-12-02 07:28:54,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 451 places, 472 transitions, 958 flow [2024-12-02 07:28:54,645 INFO L124 PetriNetUnfolderBase]: 28/470 cut-off events. [2024-12-02 07:28:54,647 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-12-02 07:28:54,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 470 events. 28/470 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 4135 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 423. Up to 7 conditions per place. [2024-12-02 07:28:54,661 INFO L82 GeneralOperation]: Start removeDead. Operand has 451 places, 472 transitions, 958 flow [2024-12-02 07:28:54,688 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 448 places, 469 transitions, 950 flow [2024-12-02 07:28:54,695 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 07:28:54,706 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;@76c15d1d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 07:28:54,706 INFO L334 AbstractCegarLoop]: Starting to check reachability of 724 error locations. [2024-12-02 07:28:54,710 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 07:28:54,710 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-12-02 07:28:54,710 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 07:28:54,710 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:28:54,710 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 07:28:54,711 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:28:54,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:54,715 INFO L85 PathProgramCache]: Analyzing trace with hash 7643541, now seen corresponding path program 1 times [2024-12-02 07:28:54,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:54,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109445957] [2024-12-02 07:28:54,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:54,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:54,963 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 07:28:54,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:54,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109445957] [2024-12-02 07:28:54,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109445957] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:28:54,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:28:54,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-12-02 07:28:54,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076682109] [2024-12-02 07:28:54,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:28:54,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:28:54,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:54,997 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:28:54,998 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:28:55,031 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 472 [2024-12-02 07:28:55,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 469 transitions, 950 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 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 07:28:55,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:28:55,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 472 [2024-12-02 07:28:55,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:29:06,490 INFO L124 PetriNetUnfolderBase]: 43994/71282 cut-off events. [2024-12-02 07:29:06,490 INFO L125 PetriNetUnfolderBase]: For 438/438 co-relation queries the response was YES. [2024-12-02 07:29:06,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142910 conditions, 71282 events. 43994/71282 cut-off events. For 438/438 co-relation queries the response was YES. Maximal size of possible extension queue 4325. Compared 631751 event pairs, 40250 based on Foata normal form. 1/24575 useless extension candidates. Maximal degree in co-relation 142244. Up to 71250 conditions per place. [2024-12-02 07:29:06,798 INFO L140 encePairwiseOnDemand]: 289/472 looper letters, 276 selfloop transitions, 2 changer transitions 0/287 dead transitions. [2024-12-02 07:29:06,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 287 transitions, 1142 flow [2024-12-02 07:29:06,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:29:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:29:06,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2024-12-02 07:29:06,814 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3495762711864407 [2024-12-02 07:29:06,816 INFO L175 Difference]: Start difference. First operand has 448 places, 469 transitions, 950 flow. Second operand 3 states and 495 transitions. [2024-12-02 07:29:06,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 287 transitions, 1142 flow [2024-12-02 07:29:06,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 287 transitions, 1134 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-02 07:29:06,833 INFO L231 Difference]: Finished difference. Result has 268 places, 287 transitions, 582 flow [2024-12-02 07:29:06,836 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=582, PETRI_PLACES=268, PETRI_TRANSITIONS=287} [2024-12-02 07:29:06,839 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -180 predicate places. [2024-12-02 07:29:06,840 INFO L471 AbstractCegarLoop]: Abstraction has has 268 places, 287 transitions, 582 flow [2024-12-02 07:29:06,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 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 07:29:06,840 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:29:06,840 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 07:29:06,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 07:29:06,840 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:29:06,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:29:06,841 INFO L85 PathProgramCache]: Analyzing trace with hash 7643542, now seen corresponding path program 1 times [2024-12-02 07:29:06,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:29:06,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766648954] [2024-12-02 07:29:06,841 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:29:06,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:29:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:29:07,047 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 07:29:07,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:29:07,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766648954] [2024-12-02 07:29:07,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766648954] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:29:07,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:29:07,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:29:07,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769252484] [2024-12-02 07:29:07,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:29:07,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:29:07,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:29:07,049 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:29:07,049 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:29:07,082 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 472 [2024-12-02 07:29:07,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 287 transitions, 582 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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 07:29:07,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:29:07,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 472 [2024-12-02 07:29:07,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:29:17,864 INFO L124 PetriNetUnfolderBase]: 43998/71294 cut-off events. [2024-12-02 07:29:17,865 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2024-12-02 07:29:17,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142710 conditions, 71294 events. 43998/71294 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 4325. Compared 631990 event pairs, 40250 based on Foata normal form. 0/24576 useless extension candidates. Maximal degree in co-relation 142614. Up to 71284 conditions per place. [2024-12-02 07:29:18,020 INFO L140 encePairwiseOnDemand]: 458/472 looper letters, 288 selfloop transitions, 10 changer transitions 0/299 dead transitions. [2024-12-02 07:29:18,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 299 transitions, 1204 flow [2024-12-02 07:29:18,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:29:18,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:29:18,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2024-12-02 07:29:18,024 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2387005649717514 [2024-12-02 07:29:18,024 INFO L175 Difference]: Start difference. First operand has 268 places, 287 transitions, 582 flow. Second operand 3 states and 338 transitions. [2024-12-02 07:29:18,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 299 transitions, 1204 flow [2024-12-02 07:29:18,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 299 transitions, 1198 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 07:29:18,030 INFO L231 Difference]: Finished difference. Result has 270 places, 295 transitions, 658 flow [2024-12-02 07:29:18,031 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=658, PETRI_PLACES=270, PETRI_TRANSITIONS=295} [2024-12-02 07:29:18,031 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -178 predicate places. [2024-12-02 07:29:18,031 INFO L471 AbstractCegarLoop]: Abstraction has has 270 places, 295 transitions, 658 flow [2024-12-02 07:29:18,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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 07:29:18,032 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:29:18,032 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-12-02 07:29:18,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 07:29:18,032 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:29:18,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:29:18,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1244245927, now seen corresponding path program 1 times [2024-12-02 07:29:18,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:29:18,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486494468] [2024-12-02 07:29:18,033 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:29:18,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:29:18,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:29:18,266 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 07:29:18,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:29:18,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486494468] [2024-12-02 07:29:18,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486494468] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:29:18,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176383604] [2024-12-02 07:29:18,267 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:29:18,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:29:18,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:29:18,269 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:29:18,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 07:29:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:29:19,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-12-02 07:29:19,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:29:19,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:29:19,365 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 07:29:19,366 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:29:19,426 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 07:29:19,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176383604] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:29:19,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:29:19,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-12-02 07:29:19,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078129563] [2024-12-02 07:29:19,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:29:19,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 07:29:19,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:29:19,427 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 07:29:19,427 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-12-02 07:29:19,528 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 472 [2024-12-02 07:29:19,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 295 transitions, 658 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 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 07:29:19,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:29:19,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 472 [2024-12-02 07:29:19,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:29:29,361 INFO L124 PetriNetUnfolderBase]: 44018/71354 cut-off events. [2024-12-02 07:29:29,361 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2024-12-02 07:29:29,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142894 conditions, 71354 events. 44018/71354 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 4361. Compared 633197 event pairs, 40250 based on Foata normal form. 0/24637 useless extension candidates. Maximal degree in co-relation 142614. Up to 71286 conditions per place. [2024-12-02 07:29:29,549 INFO L140 encePairwiseOnDemand]: 447/472 looper letters, 308 selfloop transitions, 50 changer transitions 0/359 dead transitions. [2024-12-02 07:29:29,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 359 transitions, 1570 flow [2024-12-02 07:29:29,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 07:29:29,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 07:29:29,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 474 transitions. [2024-12-02 07:29:29,552 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.12552966101694915 [2024-12-02 07:29:29,552 INFO L175 Difference]: Start difference. First operand has 270 places, 295 transitions, 658 flow. Second operand 8 states and 474 transitions. [2024-12-02 07:29:29,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 359 transitions, 1570 flow [2024-12-02 07:29:29,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 359 transitions, 1534 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 07:29:29,558 INFO L231 Difference]: Finished difference. Result has 279 places, 335 transitions, 998 flow [2024-12-02 07:29:29,559 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=998, PETRI_PLACES=279, PETRI_TRANSITIONS=335} [2024-12-02 07:29:29,559 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -169 predicate places. [2024-12-02 07:29:29,560 INFO L471 AbstractCegarLoop]: Abstraction has has 279 places, 335 transitions, 998 flow [2024-12-02 07:29:29,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 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 07:29:29,560 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:29:29,560 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-12-02 07:29:29,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 07:29:29,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:29:29,761 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:29:29,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:29:29,761 INFO L85 PathProgramCache]: Analyzing trace with hash -993591868, now seen corresponding path program 1 times [2024-12-02 07:29:29,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:29:29,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196431337] [2024-12-02 07:29:29,761 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:29:29,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:29:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:29:29,839 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 07:29:29,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:29:29,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196431337] [2024-12-02 07:29:29,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196431337] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:29:29,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:29:29,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:29:29,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297665853] [2024-12-02 07:29:29,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:29:29,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:29:29,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:29:29,840 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:29:29,840 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:29:29,854 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:29:29,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 335 transitions, 998 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 07:29:29,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:29:29,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:29:29,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:29:40,566 INFO L124 PetriNetUnfolderBase]: 44014/71350 cut-off events. [2024-12-02 07:29:40,566 INFO L125 PetriNetUnfolderBase]: For 179/179 co-relation queries the response was YES. [2024-12-02 07:29:40,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142977 conditions, 71350 events. 44014/71350 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 4361. Compared 633146 event pairs, 40250 based on Foata normal form. 4/24654 useless extension candidates. Maximal degree in co-relation 142852. Up to 71326 conditions per place. [2024-12-02 07:29:40,748 INFO L140 encePairwiseOnDemand]: 462/472 looper letters, 310 selfloop transitions, 16 changer transitions 0/335 dead transitions. [2024-12-02 07:29:40,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 335 transitions, 1637 flow [2024-12-02 07:29:40,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:29:40,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:29:40,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2024-12-02 07:29:40,749 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.24717514124293785 [2024-12-02 07:29:40,750 INFO L175 Difference]: Start difference. First operand has 279 places, 335 transitions, 998 flow. Second operand 3 states and 350 transitions. [2024-12-02 07:29:40,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 335 transitions, 1637 flow [2024-12-02 07:29:40,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 335 transitions, 1585 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-12-02 07:29:40,756 INFO L231 Difference]: Finished difference. Result has 280 places, 331 transitions, 957 flow [2024-12-02 07:29:40,756 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=925, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=957, PETRI_PLACES=280, PETRI_TRANSITIONS=331} [2024-12-02 07:29:40,757 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -168 predicate places. [2024-12-02 07:29:40,757 INFO L471 AbstractCegarLoop]: Abstraction has has 280 places, 331 transitions, 957 flow [2024-12-02 07:29:40,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 07:29:40,757 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:29:40,757 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-12-02 07:29:40,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 07:29:40,757 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:29:40,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:29:40,758 INFO L85 PathProgramCache]: Analyzing trace with hash -2057027550, now seen corresponding path program 2 times [2024-12-02 07:29:40,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:29:40,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264622844] [2024-12-02 07:29:40,758 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:29:40,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:29:40,784 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:29:40,785 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:29:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:29:40,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:29:40,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264622844] [2024-12-02 07:29:40,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264622844] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:29:40,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990525049] [2024-12-02 07:29:40,981 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:29:40,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:29:40,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:29:40,983 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:29:40,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 07:29:41,969 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:29:41,969 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:29:41,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-12-02 07:29:41,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:29:41,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-12-02 07:29:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:29:42,173 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:29:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:29:42,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990525049] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:29:42,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:29:42,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2024-12-02 07:29:42,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939676852] [2024-12-02 07:29:42,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:29:42,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-12-02 07:29:42,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:29:42,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-12-02 07:29:42,408 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2024-12-02 07:29:42,699 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 472 [2024-12-02 07:29:42,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 331 transitions, 957 flow. Second operand has 19 states, 19 states have (on average 13.68421052631579) internal successors, (260), 19 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:29:42,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:29:42,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 472 [2024-12-02 07:29:42,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:29:55,079 INFO L124 PetriNetUnfolderBase]: 44022/71366 cut-off events. [2024-12-02 07:29:55,079 INFO L125 PetriNetUnfolderBase]: For 179/179 co-relation queries the response was YES. [2024-12-02 07:29:55,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142998 conditions, 71366 events. 44022/71366 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 4361. Compared 633275 event pairs, 40250 based on Foata normal form. 16/24682 useless extension candidates. Maximal degree in co-relation 142889. Up to 71253 conditions per place. [2024-12-02 07:29:55,275 INFO L140 encePairwiseOnDemand]: 439/472 looper letters, 264 selfloop transitions, 104 changer transitions 0/369 dead transitions. [2024-12-02 07:29:55,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 369 transitions, 1765 flow [2024-12-02 07:29:55,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 07:29:55,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-12-02 07:29:55,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 596 transitions. [2024-12-02 07:29:55,278 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.07015065913370998 [2024-12-02 07:29:55,279 INFO L175 Difference]: Start difference. First operand has 280 places, 331 transitions, 957 flow. Second operand 18 states and 596 transitions. [2024-12-02 07:29:55,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 369 transitions, 1765 flow [2024-12-02 07:29:55,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 369 transitions, 1632 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-12-02 07:29:55,283 INFO L231 Difference]: Finished difference. Result has 282 places, 369 transitions, 1120 flow [2024-12-02 07:29:55,283 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1120, PETRI_PLACES=282, PETRI_TRANSITIONS=369} [2024-12-02 07:29:55,284 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -166 predicate places. [2024-12-02 07:29:55,284 INFO L471 AbstractCegarLoop]: Abstraction has has 282 places, 369 transitions, 1120 flow [2024-12-02 07:29:55,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.68421052631579) internal successors, (260), 19 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:29:55,284 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:29:55,284 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:29:55,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 07:29:55,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:29:55,485 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:29:55,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:29:55,485 INFO L85 PathProgramCache]: Analyzing trace with hash 37374772, now seen corresponding path program 1 times [2024-12-02 07:29:55,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:29:55,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712799745] [2024-12-02 07:29:55,485 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:29:55,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:29:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:29:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 07:29:55,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:29:55,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712799745] [2024-12-02 07:29:55,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712799745] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:29:55,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:29:55,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:29:55,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396086166] [2024-12-02 07:29:55,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:29:55,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:29:55,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:29:55,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:29:55,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:29:55,644 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:29:55,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 369 transitions, 1120 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:29:55,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:29:55,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:29:55,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:30:05,137 INFO L124 PetriNetUnfolderBase]: 44018/71362 cut-off events. [2024-12-02 07:30:05,138 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2024-12-02 07:30:05,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143030 conditions, 71362 events. 44018/71362 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 4361. Compared 633071 event pairs, 40250 based on Foata normal form. 4/24666 useless extension candidates. Maximal degree in co-relation 142614. Up to 71342 conditions per place. [2024-12-02 07:30:05,309 INFO L140 encePairwiseOnDemand]: 463/472 looper letters, 344 selfloop transitions, 20 changer transitions 0/365 dead transitions. [2024-12-02 07:30:05,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 365 transitions, 1830 flow [2024-12-02 07:30:05,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:30:05,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:30:05,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2024-12-02 07:30:05,311 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.24717514124293785 [2024-12-02 07:30:05,311 INFO L175 Difference]: Start difference. First operand has 282 places, 369 transitions, 1120 flow. Second operand 3 states and 350 transitions. [2024-12-02 07:30:05,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 365 transitions, 1830 flow [2024-12-02 07:30:05,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 365 transitions, 1797 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-12-02 07:30:05,319 INFO L231 Difference]: Finished difference. Result has 281 places, 365 transitions, 1109 flow [2024-12-02 07:30:05,319 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1109, PETRI_PLACES=281, PETRI_TRANSITIONS=365} [2024-12-02 07:30:05,320 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -167 predicate places. [2024-12-02 07:30:05,320 INFO L471 AbstractCegarLoop]: Abstraction has has 281 places, 365 transitions, 1109 flow [2024-12-02 07:30:05,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:30:05,320 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:30:05,320 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:30:05,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-02 07:30:05,320 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:30:05,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:30:05,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2007974623, now seen corresponding path program 1 times [2024-12-02 07:30:05,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:30:05,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794972156] [2024-12-02 07:30:05,321 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:30:05,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:30:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:30:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-12-02 07:30:05,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:30:05,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794972156] [2024-12-02 07:30:05,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794972156] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:30:05,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18651450] [2024-12-02 07:30:05,453 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:30:05,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:30:05,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:30:05,454 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:30:05,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 07:30:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:30:06,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 07:30:06,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:30:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-12-02 07:30:06,585 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:30:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-12-02 07:30:06,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18651450] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:30:06,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:30:06,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2024-12-02 07:30:06,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948214741] [2024-12-02 07:30:06,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:30:06,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 07:30:06,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:30:06,607 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 07:30:06,607 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-12-02 07:30:06,652 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:30:06,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 365 transitions, 1109 flow. Second operand has 8 states, 8 states have (on average 27.25) internal successors, (218), 8 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 07:30:06,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:30:06,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:30:06,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:30:17,359 INFO L124 PetriNetUnfolderBase]: 44002/71346 cut-off events. [2024-12-02 07:30:17,359 INFO L125 PetriNetUnfolderBase]: For 107/107 co-relation queries the response was YES. [2024-12-02 07:30:17,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142967 conditions, 71346 events. 44002/71346 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 4361. Compared 632789 event pairs, 40250 based on Foata normal form. 14/24660 useless extension candidates. Maximal degree in co-relation 142724. Up to 71274 conditions per place. [2024-12-02 07:30:17,707 INFO L140 encePairwiseOnDemand]: 447/472 looper letters, 278 selfloop transitions, 72 changer transitions 0/351 dead transitions. [2024-12-02 07:30:17,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 351 transitions, 1718 flow [2024-12-02 07:30:17,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 07:30:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 07:30:17,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 494 transitions. [2024-12-02 07:30:17,710 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.1308262711864407 [2024-12-02 07:30:17,710 INFO L175 Difference]: Start difference. First operand has 281 places, 365 transitions, 1109 flow. Second operand 8 states and 494 transitions. [2024-12-02 07:30:17,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 351 transitions, 1718 flow [2024-12-02 07:30:17,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 351 transitions, 1704 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 07:30:17,716 INFO L231 Difference]: Finished difference. Result has 288 places, 351 transitions, 1208 flow [2024-12-02 07:30:17,716 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1208, PETRI_PLACES=288, PETRI_TRANSITIONS=351} [2024-12-02 07:30:17,717 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -160 predicate places. [2024-12-02 07:30:17,717 INFO L471 AbstractCegarLoop]: Abstraction has has 288 places, 351 transitions, 1208 flow [2024-12-02 07:30:17,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.25) internal successors, (218), 8 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 07:30:17,717 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:30:17,717 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:30:17,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 07:30:17,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:30:17,918 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:30:17,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:30:17,919 INFO L85 PathProgramCache]: Analyzing trace with hash -834556813, now seen corresponding path program 2 times [2024-12-02 07:30:17,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:30:17,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132284876] [2024-12-02 07:30:17,919 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:30:17,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:30:18,017 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 07:30:18,018 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:30:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-12-02 07:30:18,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:30:18,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132284876] [2024-12-02 07:30:18,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132284876] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:30:18,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:30:18,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 07:30:18,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097088026] [2024-12-02 07:30:18,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:30:18,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 07:30:18,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:30:18,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 07:30:18,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-12-02 07:30:18,705 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 472 [2024-12-02 07:30:18,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 351 transitions, 1208 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 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 07:30:18,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:30:18,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 472 [2024-12-02 07:30:18,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:30:26,980 INFO L124 PetriNetUnfolderBase]: 28854/46505 cut-off events. [2024-12-02 07:30:26,980 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2024-12-02 07:30:27,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93362 conditions, 46505 events. 28854/46505 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 2897. Compared 386072 event pairs, 25838 based on Foata normal form. 0/17648 useless extension candidates. Maximal degree in co-relation 92910. Up to 46458 conditions per place. [2024-12-02 07:30:27,096 INFO L140 encePairwiseOnDemand]: 422/472 looper letters, 298 selfloop transitions, 6 changer transitions 0/305 dead transitions. [2024-12-02 07:30:27,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 305 transitions, 1724 flow [2024-12-02 07:30:27,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:30:27,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 07:30:27,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 338 transitions. [2024-12-02 07:30:27,098 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.14322033898305084 [2024-12-02 07:30:27,098 INFO L175 Difference]: Start difference. First operand has 288 places, 351 transitions, 1208 flow. Second operand 5 states and 338 transitions. [2024-12-02 07:30:27,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 305 transitions, 1724 flow [2024-12-02 07:30:27,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 305 transitions, 1684 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-12-02 07:30:27,102 INFO L231 Difference]: Finished difference. Result has 241 places, 305 transitions, 1088 flow [2024-12-02 07:30:27,102 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1088, PETRI_PLACES=241, PETRI_TRANSITIONS=305} [2024-12-02 07:30:27,102 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -207 predicate places. [2024-12-02 07:30:27,103 INFO L471 AbstractCegarLoop]: Abstraction has has 241 places, 305 transitions, 1088 flow [2024-12-02 07:30:27,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 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 07:30:27,103 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:30:27,103 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:30:27,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-12-02 07:30:27,103 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:30:27,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:30:27,103 INFO L85 PathProgramCache]: Analyzing trace with hash -834556820, now seen corresponding path program 1 times [2024-12-02 07:30:27,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:30:27,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446956491] [2024-12-02 07:30:27,104 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:30:27,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:30:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:30:27,293 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-12-02 07:30:27,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:30:27,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446956491] [2024-12-02 07:30:27,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446956491] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:30:27,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574101191] [2024-12-02 07:30:27,293 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:30:27,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:30:27,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:30:27,295 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:30:27,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 07:30:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:30:28,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 07:30:28,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:30:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-12-02 07:30:28,566 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:30:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-12-02 07:30:28,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574101191] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:30:28,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:30:28,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-12-02 07:30:28,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075911273] [2024-12-02 07:30:28,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:30:28,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 07:30:28,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:30:28,601 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 07:30:28,601 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-12-02 07:30:28,672 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:30:28,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 305 transitions, 1088 flow. Second operand has 13 states, 13 states have (on average 23.692307692307693) internal successors, (308), 13 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 07:30:28,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:30:28,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:30:28,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:30:36,651 INFO L124 PetriNetUnfolderBase]: 28846/46505 cut-off events. [2024-12-02 07:30:36,651 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2024-12-02 07:30:36,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93337 conditions, 46505 events. 28846/46505 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 2897. Compared 386251 event pairs, 25838 based on Foata normal form. 12/17660 useless extension candidates. Maximal degree in co-relation 92911. Up to 46425 conditions per place. [2024-12-02 07:30:36,780 INFO L140 encePairwiseOnDemand]: 447/472 looper letters, 244 selfloop transitions, 60 changer transitions 0/305 dead transitions. [2024-12-02 07:30:36,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 305 transitions, 1684 flow [2024-12-02 07:30:36,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 07:30:36,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 07:30:36,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 532 transitions. [2024-12-02 07:30:36,783 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.1024653312788906 [2024-12-02 07:30:36,783 INFO L175 Difference]: Start difference. First operand has 241 places, 305 transitions, 1088 flow. Second operand 11 states and 532 transitions. [2024-12-02 07:30:36,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 305 transitions, 1684 flow [2024-12-02 07:30:36,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 305 transitions, 1676 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-02 07:30:36,787 INFO L231 Difference]: Finished difference. Result has 249 places, 305 transitions, 1238 flow [2024-12-02 07:30:36,787 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1238, PETRI_PLACES=249, PETRI_TRANSITIONS=305} [2024-12-02 07:30:36,788 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -199 predicate places. [2024-12-02 07:30:36,788 INFO L471 AbstractCegarLoop]: Abstraction has has 249 places, 305 transitions, 1238 flow [2024-12-02 07:30:36,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 23.692307692307693) internal successors, (308), 13 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 07:30:36,788 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:30:36,788 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:30:36,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 07:30:36,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-12-02 07:30:36,989 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:30:36,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:30:36,989 INFO L85 PathProgramCache]: Analyzing trace with hash -895601051, now seen corresponding path program 2 times [2024-12-02 07:30:36,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:30:36,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865065978] [2024-12-02 07:30:36,989 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:30:36,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:30:37,183 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 07:30:37,183 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:30:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2024-12-02 07:30:37,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:30:37,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865065978] [2024-12-02 07:30:37,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865065978] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:30:37,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:30:37,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:30:37,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774661149] [2024-12-02 07:30:37,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:30:37,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:30:37,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:30:37,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:30:37,536 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:30:37,575 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 472 [2024-12-02 07:30:37,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 305 transitions, 1238 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 07:30:37,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:30:37,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 472 [2024-12-02 07:30:37,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:30:44,751 INFO L124 PetriNetUnfolderBase]: 23798/38251 cut-off events. [2024-12-02 07:30:44,751 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2024-12-02 07:30:44,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76903 conditions, 38251 events. 23798/38251 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 2473. Compared 307609 event pairs, 21078 based on Foata normal form. 0/15204 useless extension candidates. Maximal degree in co-relation 76395. Up to 38154 conditions per place. [2024-12-02 07:30:44,840 INFO L140 encePairwiseOnDemand]: 451/472 looper letters, 283 selfloop transitions, 3 changer transitions 0/287 dead transitions. [2024-12-02 07:30:44,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 287 transitions, 1774 flow [2024-12-02 07:30:44,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:30:44,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 07:30:44,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 292 transitions. [2024-12-02 07:30:44,842 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.12372881355932204 [2024-12-02 07:30:44,842 INFO L175 Difference]: Start difference. First operand has 249 places, 305 transitions, 1238 flow. Second operand 5 states and 292 transitions. [2024-12-02 07:30:44,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 287 transitions, 1774 flow [2024-12-02 07:30:44,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 287 transitions, 1694 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-12-02 07:30:44,848 INFO L231 Difference]: Finished difference. Result has 230 places, 287 transitions, 1128 flow [2024-12-02 07:30:44,848 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1128, PETRI_PLACES=230, PETRI_TRANSITIONS=287} [2024-12-02 07:30:44,849 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -218 predicate places. [2024-12-02 07:30:44,849 INFO L471 AbstractCegarLoop]: Abstraction has has 230 places, 287 transitions, 1128 flow [2024-12-02 07:30:44,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 07:30:44,849 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:30:44,849 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:30:44,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-12-02 07:30:44,850 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:30:44,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:30:44,850 INFO L85 PathProgramCache]: Analyzing trace with hash -895601050, now seen corresponding path program 1 times [2024-12-02 07:30:44,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:30:44,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021033714] [2024-12-02 07:30:44,850 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:30:44,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:30:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:30:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2024-12-02 07:30:45,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:30:45,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021033714] [2024-12-02 07:30:45,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021033714] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:30:45,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435343737] [2024-12-02 07:30:45,077 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:30:45,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:30:45,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:30:45,078 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:30:45,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 07:30:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:30:46,231 INFO L256 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 07:30:46,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:30:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2024-12-02 07:30:46,312 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:30:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2024-12-02 07:30:46,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435343737] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:30:46,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:30:46,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-12-02 07:30:46,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196278544] [2024-12-02 07:30:46,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:30:46,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-12-02 07:30:46,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:30:46,389 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-12-02 07:30:46,389 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=200, Unknown=0, NotChecked=0, Total=380 [2024-12-02 07:30:46,493 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:30:46,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 287 transitions, 1128 flow. Second operand has 20 states, 20 states have (on average 23.05) internal successors, (461), 20 states have internal predecessors, (461), 0 states have call successors, (0), 0 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 07:30:46,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:30:46,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:30:46,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:30:55,431 INFO L124 PetriNetUnfolderBase]: 23798/38277 cut-off events. [2024-12-02 07:30:55,432 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2024-12-02 07:30:55,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77025 conditions, 38277 events. 23798/38277 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 2473. Compared 307655 event pairs, 21078 based on Foata normal form. 14/15244 useless extension candidates. Maximal degree in co-relation 76396. Up to 38169 conditions per place. [2024-12-02 07:30:55,539 INFO L140 encePairwiseOnDemand]: 447/472 looper letters, 240 selfloop transitions, 72 changer transitions 0/313 dead transitions. [2024-12-02 07:30:55,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 313 transitions, 2012 flow [2024-12-02 07:30:55,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 07:30:55,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-12-02 07:30:55,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 600 transitions. [2024-12-02 07:30:55,542 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.09079903147699758 [2024-12-02 07:30:55,542 INFO L175 Difference]: Start difference. First operand has 230 places, 287 transitions, 1128 flow. Second operand 14 states and 600 transitions. [2024-12-02 07:30:55,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 313 transitions, 2012 flow [2024-12-02 07:30:55,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 313 transitions, 2007 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 07:30:55,549 INFO L231 Difference]: Finished difference. Result has 248 places, 301 transitions, 1549 flow [2024-12-02 07:30:55,550 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1549, PETRI_PLACES=248, PETRI_TRANSITIONS=301} [2024-12-02 07:30:55,550 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -200 predicate places. [2024-12-02 07:30:55,550 INFO L471 AbstractCegarLoop]: Abstraction has has 248 places, 301 transitions, 1549 flow [2024-12-02 07:30:55,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 23.05) internal successors, (461), 20 states have internal predecessors, (461), 0 states have call successors, (0), 0 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 07:30:55,551 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:30:55,551 INFO L206 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:30:55,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 07:30:55,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-12-02 07:30:55,751 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:30:55,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:30:55,752 INFO L85 PathProgramCache]: Analyzing trace with hash -942660445, now seen corresponding path program 2 times [2024-12-02 07:30:55,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:30:55,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293539915] [2024-12-02 07:30:55,752 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:30:55,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:30:55,801 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 07:30:55,802 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:30:56,385 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2024-12-02 07:30:56,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:30:56,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293539915] [2024-12-02 07:30:56,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293539915] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:30:56,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:30:56,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:30:56,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465165475] [2024-12-02 07:30:56,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:30:56,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 07:30:56,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:30:56,387 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 07:30:56,388 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-12-02 07:30:56,462 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 472 [2024-12-02 07:30:56,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 301 transitions, 1549 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 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 07:30:56,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:30:56,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 472 [2024-12-02 07:30:56,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:31:03,172 INFO L124 PetriNetUnfolderBase]: 16900/27028 cut-off events. [2024-12-02 07:31:03,172 INFO L125 PetriNetUnfolderBase]: For 270/270 co-relation queries the response was YES. [2024-12-02 07:31:03,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54674 conditions, 27028 events. 16900/27028 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 1797. Compared 204579 event pairs, 14628 based on Foata normal form. 0/11746 useless extension candidates. Maximal degree in co-relation 53892. Up to 26949 conditions per place. [2024-12-02 07:31:03,268 INFO L140 encePairwiseOnDemand]: 439/472 looper letters, 267 selfloop transitions, 5 changer transitions 0/273 dead transitions. [2024-12-02 07:31:03,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 273 transitions, 2037 flow [2024-12-02 07:31:03,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:31:03,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 07:31:03,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 274 transitions. [2024-12-02 07:31:03,270 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.11610169491525424 [2024-12-02 07:31:03,271 INFO L175 Difference]: Start difference. First operand has 248 places, 301 transitions, 1549 flow. Second operand 5 states and 274 transitions. [2024-12-02 07:31:03,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 273 transitions, 2037 flow [2024-12-02 07:31:03,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 273 transitions, 2025 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 07:31:03,281 INFO L231 Difference]: Finished difference. Result has 221 places, 273 transitions, 1491 flow [2024-12-02 07:31:03,281 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=1481, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1491, PETRI_PLACES=221, PETRI_TRANSITIONS=273} [2024-12-02 07:31:03,282 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -227 predicate places. [2024-12-02 07:31:03,282 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 273 transitions, 1491 flow [2024-12-02 07:31:03,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 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 07:31:03,282 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:31:03,282 INFO L206 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:31:03,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-12-02 07:31:03,282 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:31:03,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:31:03,283 INFO L85 PathProgramCache]: Analyzing trace with hash 341704985, now seen corresponding path program 1 times [2024-12-02 07:31:03,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:31:03,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675799566] [2024-12-02 07:31:03,283 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:31:03,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:31:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:31:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2024-12-02 07:31:03,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:31:03,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675799566] [2024-12-02 07:31:03,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675799566] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:31:03,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117680103] [2024-12-02 07:31:03,838 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:31:03,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:31:03,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:31:03,840 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:31:03,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 07:31:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:31:05,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 07:31:05,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:31:05,347 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2024-12-02 07:31:05,348 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:31:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2024-12-02 07:31:05,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117680103] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:31:05,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:31:05,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2024-12-02 07:31:05,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422878010] [2024-12-02 07:31:05,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:31:05,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-12-02 07:31:05,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:31:05,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-12-02 07:31:05,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2024-12-02 07:31:05,682 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:31:05,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 273 transitions, 1491 flow. Second operand has 29 states, 29 states have (on average 22.82758620689655) internal successors, (662), 29 states have internal predecessors, (662), 0 states have call successors, (0), 0 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 07:31:05,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:31:05,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:31:05,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:31:13,231 INFO L124 PetriNetUnfolderBase]: 16900/27034 cut-off events. [2024-12-02 07:31:13,232 INFO L125 PetriNetUnfolderBase]: For 317/317 co-relation queries the response was YES. [2024-12-02 07:31:13,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54720 conditions, 27034 events. 16900/27034 cut-off events. For 317/317 co-relation queries the response was YES. Maximal size of possible extension queue 1797. Compared 204525 event pairs, 14628 based on Foata normal form. 2/11754 useless extension candidates. Maximal degree in co-relation 53893. Up to 26922 conditions per place. [2024-12-02 07:31:13,344 INFO L140 encePairwiseOnDemand]: 447/472 looper letters, 214 selfloop transitions, 76 changer transitions 0/291 dead transitions. [2024-12-02 07:31:13,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 291 transitions, 2299 flow [2024-12-02 07:31:13,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-12-02 07:31:13,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-12-02 07:31:13,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 686 transitions. [2024-12-02 07:31:13,348 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.07266949152542374 [2024-12-02 07:31:13,348 INFO L175 Difference]: Start difference. First operand has 221 places, 273 transitions, 1491 flow. Second operand 20 states and 686 transitions. [2024-12-02 07:31:13,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 291 transitions, 2299 flow [2024-12-02 07:31:13,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 291 transitions, 2289 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-02 07:31:13,353 INFO L231 Difference]: Finished difference. Result has 238 places, 279 transitions, 1759 flow [2024-12-02 07:31:13,353 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=1481, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1759, PETRI_PLACES=238, PETRI_TRANSITIONS=279} [2024-12-02 07:31:13,354 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -210 predicate places. [2024-12-02 07:31:13,354 INFO L471 AbstractCegarLoop]: Abstraction has has 238 places, 279 transitions, 1759 flow [2024-12-02 07:31:13,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 22.82758620689655) internal successors, (662), 29 states have internal predecessors, (662), 0 states have call successors, (0), 0 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 07:31:13,354 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:31:13,354 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:31:13,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 07:31:13,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-12-02 07:31:13,555 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:31:13,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:31:13,555 INFO L85 PathProgramCache]: Analyzing trace with hash 349810164, now seen corresponding path program 2 times [2024-12-02 07:31:13,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:31:13,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662590577] [2024-12-02 07:31:13,555 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:31:13,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:31:13,601 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 07:31:13,601 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:31:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2024-12-02 07:31:13,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:31:13,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662590577] [2024-12-02 07:31:13,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662590577] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:31:13,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:31:13,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:31:13,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213303522] [2024-12-02 07:31:13,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:31:13,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:31:13,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:31:13,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:31:13,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:31:13,816 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 472 [2024-12-02 07:31:13,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 279 transitions, 1759 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:31:13,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:31:13,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 472 [2024-12-02 07:31:13,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:31:19,183 INFO L124 PetriNetUnfolderBase]: 14720/23489 cut-off events. [2024-12-02 07:31:19,184 INFO L125 PetriNetUnfolderBase]: For 433/433 co-relation queries the response was YES. [2024-12-02 07:31:19,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47718 conditions, 23489 events. 14720/23489 cut-off events. For 433/433 co-relation queries the response was YES. Maximal size of possible extension queue 1507. Compared 172186 event pairs, 12608 based on Foata normal form. 0/10602 useless extension candidates. Maximal degree in co-relation 46798. Up to 23360 conditions per place. [2024-12-02 07:31:19,417 INFO L140 encePairwiseOnDemand]: 459/472 looper letters, 265 selfloop transitions, 3 changer transitions 0/269 dead transitions. [2024-12-02 07:31:19,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 269 transitions, 2275 flow [2024-12-02 07:31:19,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:31:19,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 07:31:19,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 246 transitions. [2024-12-02 07:31:19,418 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.10423728813559321 [2024-12-02 07:31:19,418 INFO L175 Difference]: Start difference. First operand has 238 places, 279 transitions, 1759 flow. Second operand 5 states and 246 transitions. [2024-12-02 07:31:19,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 269 transitions, 2275 flow [2024-12-02 07:31:19,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 269 transitions, 2175 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-12-02 07:31:19,425 INFO L231 Difference]: Finished difference. Result has 219 places, 269 transitions, 1645 flow [2024-12-02 07:31:19,425 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=1639, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1645, PETRI_PLACES=219, PETRI_TRANSITIONS=269} [2024-12-02 07:31:19,425 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -229 predicate places. [2024-12-02 07:31:19,425 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 269 transitions, 1645 flow [2024-12-02 07:31:19,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:31:19,425 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:31:19,425 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:31:19,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-12-02 07:31:19,426 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err64REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:31:19,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:31:19,426 INFO L85 PathProgramCache]: Analyzing trace with hash 349810176, now seen corresponding path program 1 times [2024-12-02 07:31:19,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:31:19,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223455284] [2024-12-02 07:31:19,427 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:31:19,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:31:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:31:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-12-02 07:31:19,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:31:19,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223455284] [2024-12-02 07:31:19,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223455284] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:31:19,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:31:19,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:31:19,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946050971] [2024-12-02 07:31:19,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:31:19,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:31:19,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:31:19,917 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:31:19,917 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:31:19,971 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 472 [2024-12-02 07:31:19,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 269 transitions, 1645 flow. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 07:31:19,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:31:19,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 472 [2024-12-02 07:31:19,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:31:25,319 INFO L124 PetriNetUnfolderBase]: 13282/21154 cut-off events. [2024-12-02 07:31:25,320 INFO L125 PetriNetUnfolderBase]: For 310/310 co-relation queries the response was YES. [2024-12-02 07:31:25,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42998 conditions, 21154 events. 13282/21154 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 1311. Compared 151598 event pairs, 11282 based on Foata normal form. 0/9826 useless extension candidates. Maximal degree in co-relation 42125. Up to 21025 conditions per place. [2024-12-02 07:31:25,387 INFO L140 encePairwiseOnDemand]: 462/472 looper letters, 258 selfloop transitions, 3 changer transitions 0/262 dead transitions. [2024-12-02 07:31:25,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 262 transitions, 2153 flow [2024-12-02 07:31:25,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:31:25,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 07:31:25,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 236 transitions. [2024-12-02 07:31:25,389 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.1 [2024-12-02 07:31:25,389 INFO L175 Difference]: Start difference. First operand has 219 places, 269 transitions, 1645 flow. Second operand 5 states and 236 transitions. [2024-12-02 07:31:25,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 262 transitions, 2153 flow [2024-12-02 07:31:25,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 262 transitions, 2148 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 07:31:25,395 INFO L231 Difference]: Finished difference. Result has 213 places, 262 transitions, 1632 flow [2024-12-02 07:31:25,396 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=1626, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1632, PETRI_PLACES=213, PETRI_TRANSITIONS=262} [2024-12-02 07:31:25,396 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -235 predicate places. [2024-12-02 07:31:25,396 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 262 transitions, 1632 flow [2024-12-02 07:31:25,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 07:31:25,396 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:31:25,396 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:31:25,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-12-02 07:31:25,396 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err53REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:31:25,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:31:25,397 INFO L85 PathProgramCache]: Analyzing trace with hash 349810165, now seen corresponding path program 1 times [2024-12-02 07:31:25,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:31:25,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120874051] [2024-12-02 07:31:25,397 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:31:25,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:31:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:31:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2024-12-02 07:31:27,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:31:27,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120874051] [2024-12-02 07:31:27,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120874051] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:31:27,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278493170] [2024-12-02 07:31:27,162 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:31:27,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:31:27,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:31:27,164 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:31:27,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 07:31:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:31:28,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 135 conjuncts are in the unsatisfiable core [2024-12-02 07:31:28,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:31:28,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:31:28,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:31:28,647 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-12-02 07:31:28,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-12-02 07:31:28,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2024-12-02 07:31:28,917 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-12-02 07:31:28,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-12-02 07:31:28,933 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-12-02 07:31:28,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2024-12-02 07:31:29,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:31:29,097 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-02 07:31:29,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2024-12-02 07:31:29,107 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:31:29,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-12-02 07:31:29,168 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2024-12-02 07:31:29,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2024-12-02 07:31:29,914 INFO L349 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2024-12-02 07:31:29,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 43 [2024-12-02 07:31:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 12 proven. 365 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-12-02 07:31:30,413 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:31:32,135 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2024-12-02 07:31:32,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278493170] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 07:31:32,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:31:32,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [9, 30] total 50 [2024-12-02 07:31:32,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819670589] [2024-12-02 07:31:32,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:31:32,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 07:31:32,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:31:32,136 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 07:31:32,137 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2024-12-02 07:31:33,141 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:31:33,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 262 transitions, 1632 flow. Second operand has 14 states, 14 states have (on average 23.214285714285715) internal successors, (325), 14 states have internal predecessors, (325), 0 states have call successors, (0), 0 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 07:31:33,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:31:33,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:31:33,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:31:34,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 07:31:40,682 INFO L124 PetriNetUnfolderBase]: 11357/18034 cut-off events. [2024-12-02 07:31:40,682 INFO L125 PetriNetUnfolderBase]: For 305/305 co-relation queries the response was YES. [2024-12-02 07:31:40,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36754 conditions, 18034 events. 11357/18034 cut-off events. For 305/305 co-relation queries the response was YES. Maximal size of possible extension queue 1067. Compared 125064 event pairs, 9517 based on Foata normal form. 0/8761 useless extension candidates. Maximal degree in co-relation 35881. Up to 17905 conditions per place. [2024-12-02 07:31:40,741 INFO L140 encePairwiseOnDemand]: 459/472 looper letters, 248 selfloop transitions, 3 changer transitions 0/252 dead transitions. [2024-12-02 07:31:40,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 252 transitions, 2114 flow [2024-12-02 07:31:40,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:31:40,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 07:31:40,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 269 transitions. [2024-12-02 07:31:40,742 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.11398305084745762 [2024-12-02 07:31:40,742 INFO L175 Difference]: Start difference. First operand has 213 places, 262 transitions, 1632 flow. Second operand 5 states and 269 transitions. [2024-12-02 07:31:40,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 252 transitions, 2114 flow [2024-12-02 07:31:40,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 252 transitions, 2109 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 07:31:40,748 INFO L231 Difference]: Finished difference. Result has 204 places, 252 transitions, 1613 flow [2024-12-02 07:31:40,749 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1613, PETRI_PLACES=204, PETRI_TRANSITIONS=252} [2024-12-02 07:31:40,749 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -244 predicate places. [2024-12-02 07:31:40,749 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 252 transitions, 1613 flow [2024-12-02 07:31:40,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.214285714285715) internal successors, (325), 14 states have internal predecessors, (325), 0 states have call successors, (0), 0 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 07:31:40,749 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:31:40,749 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:31:40,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 07:31:40,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:31:40,950 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err65REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:31:40,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:31:40,950 INFO L85 PathProgramCache]: Analyzing trace with hash 349810177, now seen corresponding path program 1 times [2024-12-02 07:31:40,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:31:40,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16907319] [2024-12-02 07:31:40,950 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:31:40,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:31:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:31:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2024-12-02 07:31:41,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:31:41,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16907319] [2024-12-02 07:31:41,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16907319] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:31:41,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78888797] [2024-12-02 07:31:41,546 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:31:41,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:31:41,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:31:41,547 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:31:41,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 07:31:42,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:31:42,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-12-02 07:31:42,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:31:42,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:31:42,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-12-02 07:31:42,808 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-12-02 07:31:42,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-12-02 07:31:42,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:31:43,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:31:43,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:31:43,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-12-02 07:31:43,089 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-12-02 07:31:43,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-12-02 07:31:43,327 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-12-02 07:31:43,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 25 [2024-12-02 07:31:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 168 proven. 26 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2024-12-02 07:31:44,320 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:31:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2024-12-02 07:31:46,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78888797] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 07:31:46,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:31:46,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [6, 23] total 49 [2024-12-02 07:31:46,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781781059] [2024-12-02 07:31:46,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:31:46,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-12-02 07:31:46,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:31:46,130 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-12-02 07:31:46,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=658, Invalid=1792, Unknown=0, NotChecked=0, Total=2450 [2024-12-02 07:31:47,360 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:31:47,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 252 transitions, 1613 flow. Second operand has 23 states, 23 states have (on average 22.652173913043477) internal successors, (521), 23 states have internal predecessors, (521), 0 states have call successors, (0), 0 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 07:31:47,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:31:47,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:31:47,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:31:55,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 07:31:58,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.70s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 07:32:02,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 07:32:06,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 07:32:10,889 INFO L124 PetriNetUnfolderBase]: 10102/16012 cut-off events. [2024-12-02 07:32:10,889 INFO L125 PetriNetUnfolderBase]: For 309/309 co-relation queries the response was YES. [2024-12-02 07:32:10,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32833 conditions, 16012 events. 10102/16012 cut-off events. For 309/309 co-relation queries the response was YES. Maximal size of possible extension queue 903. Compared 108249 event pairs, 8368 based on Foata normal form. 0/8062 useless extension candidates. Maximal degree in co-relation 31798. Up to 15865 conditions per place. [2024-12-02 07:32:10,927 INFO L140 encePairwiseOnDemand]: 449/472 looper letters, 214 selfloop transitions, 48 changer transitions 0/263 dead transitions. [2024-12-02 07:32:10,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 263 transitions, 2417 flow [2024-12-02 07:32:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 07:32:10,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-12-02 07:32:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 591 transitions. [2024-12-02 07:32:10,929 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.06956214689265537 [2024-12-02 07:32:10,930 INFO L175 Difference]: Start difference. First operand has 204 places, 252 transitions, 1613 flow. Second operand 18 states and 591 transitions. [2024-12-02 07:32:10,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 263 transitions, 2417 flow [2024-12-02 07:32:10,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 263 transitions, 2410 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 07:32:10,939 INFO L231 Difference]: Finished difference. Result has 213 places, 257 transitions, 1910 flow [2024-12-02 07:32:10,940 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=1594, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1910, PETRI_PLACES=213, PETRI_TRANSITIONS=257} [2024-12-02 07:32:10,940 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -235 predicate places. [2024-12-02 07:32:10,940 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 257 transitions, 1910 flow [2024-12-02 07:32:10,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 22.652173913043477) internal successors, (521), 23 states have internal predecessors, (521), 0 states have call successors, (0), 0 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 07:32:10,941 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:32:10,941 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:32:10,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 07:32:11,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-12-02 07:32:11,141 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err58REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:32:11,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:32:11,142 INFO L85 PathProgramCache]: Analyzing trace with hash 349810170, now seen corresponding path program 1 times [2024-12-02 07:32:11,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:32:11,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680739061] [2024-12-02 07:32:11,142 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:32:11,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:32:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:32:11,550 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-12-02 07:32:11,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:32:11,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680739061] [2024-12-02 07:32:11,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680739061] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:32:11,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:32:11,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 07:32:11,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702887933] [2024-12-02 07:32:11,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:32:11,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 07:32:11,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:32:11,551 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 07:32:11,551 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 07:32:11,613 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 472 [2024-12-02 07:32:11,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 257 transitions, 1910 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 07:32:11,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:32:11,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 472 [2024-12-02 07:32:11,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:32:14,694 INFO L124 PetriNetUnfolderBase]: 8432/13317 cut-off events. [2024-12-02 07:32:14,694 INFO L125 PetriNetUnfolderBase]: For 441/441 co-relation queries the response was YES. [2024-12-02 07:32:14,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27503 conditions, 13317 events. 8432/13317 cut-off events. For 441/441 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 86210 event pairs, 6858 based on Foata normal form. 0/7082 useless extension candidates. Maximal degree in co-relation 26904. Up to 13170 conditions per place. [2024-12-02 07:32:14,734 INFO L140 encePairwiseOnDemand]: 459/472 looper letters, 242 selfloop transitions, 4 changer transitions 0/247 dead transitions. [2024-12-02 07:32:14,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 247 transitions, 2382 flow [2024-12-02 07:32:14,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:32:14,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 07:32:14,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 212 transitions. [2024-12-02 07:32:14,735 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.08983050847457627 [2024-12-02 07:32:14,735 INFO L175 Difference]: Start difference. First operand has 213 places, 257 transitions, 1910 flow. Second operand 5 states and 212 transitions. [2024-12-02 07:32:14,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 247 transitions, 2382 flow [2024-12-02 07:32:14,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 247 transitions, 2347 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-12-02 07:32:14,742 INFO L231 Difference]: Finished difference. Result has 202 places, 247 transitions, 1863 flow [2024-12-02 07:32:14,742 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=1855, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1863, PETRI_PLACES=202, PETRI_TRANSITIONS=247} [2024-12-02 07:32:14,742 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -246 predicate places. [2024-12-02 07:32:14,742 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 247 transitions, 1863 flow [2024-12-02 07:32:14,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 07:32:14,742 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:32:14,743 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:32:14,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-12-02 07:32:14,743 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:32:14,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:32:14,743 INFO L85 PathProgramCache]: Analyzing trace with hash 349810171, now seen corresponding path program 1 times [2024-12-02 07:32:14,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:32:14,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687697298] [2024-12-02 07:32:14,743 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:32:14,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:32:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:32:15,622 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2024-12-02 07:32:15,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:32:15,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687697298] [2024-12-02 07:32:15,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687697298] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:32:15,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536676562] [2024-12-02 07:32:15,622 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:32:15,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:32:15,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:32:15,624 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:32:15,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 07:32:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:32:16,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-12-02 07:32:16,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:32:16,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:32:16,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:32:16,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:32:16,952 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-12-02 07:32:16,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-12-02 07:32:16,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:32:16,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:32:16,992 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:32:16,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-12-02 07:32:17,030 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-02 07:32:17,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-12-02 07:32:17,563 INFO L349 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2024-12-02 07:32:17,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 33 [2024-12-02 07:32:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 168 proven. 186 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-12-02 07:32:18,301 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:32:22,990 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2036 Int)) (or (< v_ArrVal_2036 52) (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_610| Int) (|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_611| Int)) (<= (+ 16 c_~count_occurrences_of_6~0.offset) (select (store (store |c_#length| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_611| v_ArrVal_2036) |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_610| 52) c_~count_occurrences_of_6~0.base))))) (<= 0 (+ 12 c_~count_occurrences_of_6~0.offset))) is different from false [2024-12-02 07:32:23,400 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 493 treesize of output 487 [2024-12-02 07:32:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 181 proven. 4 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2024-12-02 07:32:24,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536676562] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:32:24,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:32:24,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 36, 23] total 63 [2024-12-02 07:32:24,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888151912] [2024-12-02 07:32:24,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:32:24,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-12-02 07:32:24,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:32:24,278 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-12-02 07:32:24,279 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=815, Invalid=3094, Unknown=1, NotChecked=122, Total=4032 [2024-12-02 07:32:24,445 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 472 [2024-12-02 07:32:24,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 247 transitions, 1863 flow. Second operand has 64 states, 64 states have (on average 5.515625) internal successors, (353), 64 states have internal predecessors, (353), 0 states have call successors, (0), 0 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 07:32:24,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:32:24,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 472 [2024-12-02 07:32:24,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:32:33,228 INFO L124 PetriNetUnfolderBase]: 6928/10920 cut-off events. [2024-12-02 07:32:33,229 INFO L125 PetriNetUnfolderBase]: For 417/417 co-relation queries the response was YES. [2024-12-02 07:32:33,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23042 conditions, 10920 events. 6928/10920 cut-off events. For 417/417 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 66908 event pairs, 5498 based on Foata normal form. 0/6200 useless extension candidates. Maximal degree in co-relation 22221. Up to 10725 conditions per place. [2024-12-02 07:32:33,266 INFO L140 encePairwiseOnDemand]: 445/472 looper letters, 197 selfloop transitions, 105 changer transitions 0/303 dead transitions. [2024-12-02 07:32:33,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 303 transitions, 3517 flow [2024-12-02 07:32:33,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-12-02 07:32:33,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-12-02 07:32:33,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 435 transitions. [2024-12-02 07:32:33,270 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.022478296816866472 [2024-12-02 07:32:33,271 INFO L175 Difference]: Start difference. First operand has 202 places, 247 transitions, 1863 flow. Second operand 41 states and 435 transitions. [2024-12-02 07:32:33,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 303 transitions, 3517 flow [2024-12-02 07:32:33,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 303 transitions, 3510 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 07:32:33,278 INFO L231 Difference]: Finished difference. Result has 229 places, 269 transitions, 2602 flow [2024-12-02 07:32:33,279 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=2602, PETRI_PLACES=229, PETRI_TRANSITIONS=269} [2024-12-02 07:32:33,279 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -219 predicate places. [2024-12-02 07:32:33,279 INFO L471 AbstractCegarLoop]: Abstraction has has 229 places, 269 transitions, 2602 flow [2024-12-02 07:32:33,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 5.515625) internal successors, (353), 64 states have internal predecessors, (353), 0 states have call successors, (0), 0 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 07:32:33,279 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:32:33,279 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:32:33,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 07:32:33,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:32:33,480 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err66REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:32:33,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:32:33,480 INFO L85 PathProgramCache]: Analyzing trace with hash 349810178, now seen corresponding path program 1 times [2024-12-02 07:32:33,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:32:33,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256446414] [2024-12-02 07:32:33,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:32:33,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:32:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:32:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-12-02 07:32:33,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:32:33,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256446414] [2024-12-02 07:32:33,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256446414] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:32:33,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:32:33,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:32:33,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51967613] [2024-12-02 07:32:33,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:32:33,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:32:33,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:32:33,931 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:32:33,931 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:32:33,976 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 472 [2024-12-02 07:32:33,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 269 transitions, 2602 flow. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 07:32:33,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:32:33,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 472 [2024-12-02 07:32:33,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:32:37,047 INFO L124 PetriNetUnfolderBase]: 5956/9362 cut-off events. [2024-12-02 07:32:37,047 INFO L125 PetriNetUnfolderBase]: For 592/592 co-relation queries the response was YES. [2024-12-02 07:32:37,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20027 conditions, 9362 events. 5956/9362 cut-off events. For 592/592 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 55255 event pairs, 4638 based on Foata normal form. 0/5580 useless extension candidates. Maximal degree in co-relation 19154. Up to 9167 conditions per place. [2024-12-02 07:32:37,068 INFO L140 encePairwiseOnDemand]: 462/472 looper letters, 249 selfloop transitions, 12 changer transitions 0/262 dead transitions. [2024-12-02 07:32:37,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 262 transitions, 3110 flow [2024-12-02 07:32:37,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:32:37,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 07:32:37,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 192 transitions. [2024-12-02 07:32:37,069 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.08135593220338982 [2024-12-02 07:32:37,070 INFO L175 Difference]: Start difference. First operand has 229 places, 269 transitions, 2602 flow. Second operand 5 states and 192 transitions. [2024-12-02 07:32:37,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 262 transitions, 3110 flow [2024-12-02 07:32:37,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 262 transitions, 2803 flow, removed 27 selfloop flow, removed 31 redundant places. [2024-12-02 07:32:37,077 INFO L231 Difference]: Finished difference. Result has 195 places, 262 transitions, 2305 flow [2024-12-02 07:32:37,078 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=2281, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2305, PETRI_PLACES=195, PETRI_TRANSITIONS=262} [2024-12-02 07:32:37,078 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -253 predicate places. [2024-12-02 07:32:37,078 INFO L471 AbstractCegarLoop]: Abstraction has has 195 places, 262 transitions, 2305 flow [2024-12-02 07:32:37,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 07:32:37,078 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:32:37,078 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:32:37,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-12-02 07:32:37,078 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err67REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:32:37,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:32:37,079 INFO L85 PathProgramCache]: Analyzing trace with hash 349810179, now seen corresponding path program 1 times [2024-12-02 07:32:37,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:32:37,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118444336] [2024-12-02 07:32:37,079 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:32:37,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:32:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:32:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2024-12-02 07:32:37,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:32:37,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118444336] [2024-12-02 07:32:37,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118444336] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:32:37,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421110093] [2024-12-02 07:32:37,834 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:32:37,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:32:37,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:32:37,835 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:32:37,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 07:32:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:32:39,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 1004 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-12-02 07:32:39,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:32:39,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-12-02 07:32:39,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:32:39,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-12-02 07:32:39,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:32:39,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:32:39,188 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:32:39,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-12-02 07:32:39,256 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-02 07:32:39,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-12-02 07:32:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 168 proven. 26 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2024-12-02 07:32:39,861 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:32:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:32:40,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421110093] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 07:32:40,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:32:40,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [9, 22] total 45 [2024-12-02 07:32:40,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857464622] [2024-12-02 07:32:40,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:32:40,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 07:32:40,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:32:40,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 07:32:40,826 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=524, Invalid=1546, Unknown=0, NotChecked=0, Total=2070 [2024-12-02 07:32:41,268 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:32:41,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 262 transitions, 2305 flow. Second operand has 18 states, 18 states have (on average 23.055555555555557) internal successors, (415), 18 states have internal predecessors, (415), 0 states have call successors, (0), 0 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 07:32:41,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:32:41,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:32:41,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:32:43,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 07:32:46,004 INFO L124 PetriNetUnfolderBase]: 5056/7924 cut-off events. [2024-12-02 07:32:46,004 INFO L125 PetriNetUnfolderBase]: For 307/307 co-relation queries the response was YES. [2024-12-02 07:32:46,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17003 conditions, 7924 events. 5056/7924 cut-off events. For 307/307 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 44558 event pairs, 3850 based on Foata normal form. 0/4984 useless extension candidates. Maximal degree in co-relation 16203. Up to 7729 conditions per place. [2024-12-02 07:32:46,020 INFO L140 encePairwiseOnDemand]: 451/472 looper letters, 198 selfloop transitions, 62 changer transitions 0/261 dead transitions. [2024-12-02 07:32:46,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 261 transitions, 2913 flow [2024-12-02 07:32:46,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 07:32:46,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 07:32:46,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 415 transitions. [2024-12-02 07:32:46,022 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.0799306625577812 [2024-12-02 07:32:46,022 INFO L175 Difference]: Start difference. First operand has 195 places, 262 transitions, 2305 flow. Second operand 11 states and 415 transitions. [2024-12-02 07:32:46,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 261 transitions, 2913 flow [2024-12-02 07:32:46,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 261 transitions, 2890 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 07:32:46,028 INFO L231 Difference]: Finished difference. Result has 195 places, 255 transitions, 2392 flow [2024-12-02 07:32:46,028 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=2268, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2392, PETRI_PLACES=195, PETRI_TRANSITIONS=255} [2024-12-02 07:32:46,029 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -253 predicate places. [2024-12-02 07:32:46,029 INFO L471 AbstractCegarLoop]: Abstraction has has 195 places, 255 transitions, 2392 flow [2024-12-02 07:32:46,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 23.055555555555557) internal successors, (415), 18 states have internal predecessors, (415), 0 states have call successors, (0), 0 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 07:32:46,029 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:32:46,029 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:32:46,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 07:32:46,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:32:46,230 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:32:46,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:32:46,230 INFO L85 PathProgramCache]: Analyzing trace with hash -2041775572, now seen corresponding path program 1 times [2024-12-02 07:32:46,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:32:46,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394691986] [2024-12-02 07:32:46,231 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:32:46,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:32:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:32:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 132 proven. 37 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:32:46,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:32:46,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394691986] [2024-12-02 07:32:46,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394691986] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:32:46,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909100161] [2024-12-02 07:32:46,784 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:32:46,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:32:46,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:32:46,786 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:32:46,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 07:32:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:32:47,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-12-02 07:32:47,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:32:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 156 proven. 13 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:32:48,233 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:32:48,306 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 07:32:48,569 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 156 proven. 13 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:32:48,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909100161] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:32:48,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:32:48,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2024-12-02 07:32:48,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576335436] [2024-12-02 07:32:48,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:32:48,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-12-02 07:32:48,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:32:48,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-12-02 07:32:48,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=722, Invalid=1630, Unknown=0, NotChecked=0, Total=2352 [2024-12-02 07:32:49,392 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:32:49,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 255 transitions, 2392 flow. Second operand has 49 states, 49 states have (on average 22.551020408163264) internal successors, (1105), 49 states have internal predecessors, (1105), 0 states have call successors, (0), 0 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 07:32:49,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:32:49,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:32:49,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:32:54,268 INFO L124 PetriNetUnfolderBase]: 7652/12138 cut-off events. [2024-12-02 07:32:54,268 INFO L125 PetriNetUnfolderBase]: For 524/524 co-relation queries the response was YES. [2024-12-02 07:32:54,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26213 conditions, 12138 events. 7652/12138 cut-off events. For 524/524 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 74307 event pairs, 3850 based on Foata normal form. 0/7618 useless extension candidates. Maximal degree in co-relation 24475. Up to 7729 conditions per place. [2024-12-02 07:32:54,313 INFO L140 encePairwiseOnDemand]: 451/472 looper letters, 330 selfloop transitions, 166 changer transitions 0/497 dead transitions. [2024-12-02 07:32:54,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 497 transitions, 5757 flow [2024-12-02 07:32:54,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-12-02 07:32:54,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-12-02 07:32:54,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1116 transitions. [2024-12-02 07:32:54,317 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.07627118644067797 [2024-12-02 07:32:54,317 INFO L175 Difference]: Start difference. First operand has 195 places, 255 transitions, 2392 flow. Second operand 31 states and 1116 transitions. [2024-12-02 07:32:54,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 497 transitions, 5757 flow [2024-12-02 07:32:54,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 497 transitions, 5574 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-12-02 07:32:54,327 INFO L231 Difference]: Finished difference. Result has 218 places, 317 transitions, 3670 flow [2024-12-02 07:32:54,327 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3670, PETRI_PLACES=218, PETRI_TRANSITIONS=317} [2024-12-02 07:32:54,327 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -230 predicate places. [2024-12-02 07:32:54,327 INFO L471 AbstractCegarLoop]: Abstraction has has 218 places, 317 transitions, 3670 flow [2024-12-02 07:32:54,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 22.551020408163264) internal successors, (1105), 49 states have internal predecessors, (1105), 0 states have call successors, (0), 0 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 07:32:54,328 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:32:54,328 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:32:54,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 07:32:54,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:32:54,528 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:32:54,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:32:54,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2041775585, now seen corresponding path program 1 times [2024-12-02 07:32:54,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:32:54,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722724572] [2024-12-02 07:32:54,529 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:32:54,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:32:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:32:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2024-12-02 07:32:54,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:32:54,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722724572] [2024-12-02 07:32:54,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722724572] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:32:54,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:32:54,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:32:54,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772471681] [2024-12-02 07:32:54,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:32:54,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:32:54,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:32:54,731 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:32:54,731 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:32:54,756 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 472 [2024-12-02 07:32:54,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 317 transitions, 3670 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 07:32:54,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:32:54,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 472 [2024-12-02 07:32:54,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:32:57,049 INFO L124 PetriNetUnfolderBase]: 6464/10226 cut-off events. [2024-12-02 07:32:57,050 INFO L125 PetriNetUnfolderBase]: For 1053/1053 co-relation queries the response was YES. [2024-12-02 07:32:57,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23123 conditions, 10226 events. 6464/10226 cut-off events. For 1053/1053 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 59418 event pairs, 5020 based on Foata normal form. 0/7062 useless extension candidates. Maximal degree in co-relation 21341. Up to 9939 conditions per place. [2024-12-02 07:32:57,078 INFO L140 encePairwiseOnDemand]: 463/472 looper letters, 307 selfloop transitions, 3 changer transitions 0/311 dead transitions. [2024-12-02 07:32:57,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 311 transitions, 4278 flow [2024-12-02 07:32:57,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:32:57,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 07:32:57,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 178 transitions. [2024-12-02 07:32:57,079 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.07542372881355933 [2024-12-02 07:32:57,079 INFO L175 Difference]: Start difference. First operand has 218 places, 317 transitions, 3670 flow. Second operand 5 states and 178 transitions. [2024-12-02 07:32:57,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 311 transitions, 4278 flow [2024-12-02 07:32:57,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 311 transitions, 4065 flow, removed 32 selfloop flow, removed 17 redundant places. [2024-12-02 07:32:57,089 INFO L231 Difference]: Finished difference. Result has 199 places, 311 transitions, 3451 flow [2024-12-02 07:32:57,089 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3445, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3451, PETRI_PLACES=199, PETRI_TRANSITIONS=311} [2024-12-02 07:32:57,089 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -249 predicate places. [2024-12-02 07:32:57,089 INFO L471 AbstractCegarLoop]: Abstraction has has 199 places, 311 transitions, 3451 flow [2024-12-02 07:32:57,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 07:32:57,090 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:32:57,090 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:32:57,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-12-02 07:32:57,090 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:32:57,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:32:57,090 INFO L85 PathProgramCache]: Analyzing trace with hash -2041775584, now seen corresponding path program 1 times [2024-12-02 07:32:57,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:32:57,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195030158] [2024-12-02 07:32:57,090 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:32:57,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:32:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:32:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2024-12-02 07:32:57,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:32:57,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195030158] [2024-12-02 07:32:57,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195030158] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:32:57,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270972815] [2024-12-02 07:32:57,437 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:32:57,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:32:57,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:32:57,438 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:32:57,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 07:32:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:32:58,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-12-02 07:32:58,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:32:58,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:32:58,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-12-02 07:32:58,795 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:32:58,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-12-02 07:32:58,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:32:59,387 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 156 proven. 13 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:32:59,387 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:33:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:33:00,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270972815] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 07:33:00,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:33:00,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [6, 17] total 38 [2024-12-02 07:33:00,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360924247] [2024-12-02 07:33:00,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:33:00,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 07:33:00,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:33:00,076 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 07:33:00,076 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=978, Unknown=0, NotChecked=0, Total=1482 [2024-12-02 07:33:00,513 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:33:00,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 311 transitions, 3451 flow. Second operand has 18 states, 18 states have (on average 23.11111111111111) internal successors, (416), 18 states have internal predecessors, (416), 0 states have call successors, (0), 0 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 07:33:00,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:33:00,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:33:00,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:33:03,605 INFO L124 PetriNetUnfolderBase]: 6352/10048 cut-off events. [2024-12-02 07:33:03,605 INFO L125 PetriNetUnfolderBase]: For 741/741 co-relation queries the response was YES. [2024-12-02 07:33:03,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22637 conditions, 10048 events. 6352/10048 cut-off events. For 741/741 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 58421 event pairs, 3549 based on Foata normal form. 0/6982 useless extension candidates. Maximal degree in co-relation 20950. Up to 7196 conditions per place. [2024-12-02 07:33:03,638 INFO L140 encePairwiseOnDemand]: 450/472 looper letters, 269 selfloop transitions, 99 changer transitions 0/369 dead transitions. [2024-12-02 07:33:03,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 369 transitions, 4396 flow [2024-12-02 07:33:03,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 07:33:03,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-12-02 07:33:03,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 476 transitions. [2024-12-02 07:33:03,639 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.08403954802259887 [2024-12-02 07:33:03,639 INFO L175 Difference]: Start difference. First operand has 199 places, 311 transitions, 3451 flow. Second operand 12 states and 476 transitions. [2024-12-02 07:33:03,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 369 transitions, 4396 flow [2024-12-02 07:33:03,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 369 transitions, 4391 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 07:33:03,650 INFO L231 Difference]: Finished difference. Result has 209 places, 313 transitions, 3667 flow [2024-12-02 07:33:03,650 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3446, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3667, PETRI_PLACES=209, PETRI_TRANSITIONS=313} [2024-12-02 07:33:03,651 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -239 predicate places. [2024-12-02 07:33:03,651 INFO L471 AbstractCegarLoop]: Abstraction has has 209 places, 313 transitions, 3667 flow [2024-12-02 07:33:03,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 23.11111111111111) internal successors, (416), 18 states have internal predecessors, (416), 0 states have call successors, (0), 0 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 07:33:03,651 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:33:03,651 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:33:03,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-12-02 07:33:03,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-12-02 07:33:03,851 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:33:03,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:33:03,852 INFO L85 PathProgramCache]: Analyzing trace with hash -2041775581, now seen corresponding path program 1 times [2024-12-02 07:33:03,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:33:03,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134567759] [2024-12-02 07:33:03,852 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:33:03,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:33:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:33:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2024-12-02 07:33:03,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:33:03,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134567759] [2024-12-02 07:33:03,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134567759] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:33:03,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:33:03,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:33:03,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478120844] [2024-12-02 07:33:03,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:33:03,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:33:03,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:33:03,988 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:33:03,988 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:33:04,016 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 472 [2024-12-02 07:33:04,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 313 transitions, 3667 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:33:04,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:33:04,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 472 [2024-12-02 07:33:04,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:33:05,906 INFO L124 PetriNetUnfolderBase]: 5164/8154 cut-off events. [2024-12-02 07:33:05,907 INFO L125 PetriNetUnfolderBase]: For 2520/2520 co-relation queries the response was YES. [2024-12-02 07:33:05,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19514 conditions, 8154 events. 5164/8154 cut-off events. For 2520/2520 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 44483 event pairs, 3896 based on Foata normal form. 186/6226 useless extension candidates. Maximal degree in co-relation 17750. Up to 7867 conditions per place. [2024-12-02 07:33:05,927 INFO L140 encePairwiseOnDemand]: 464/472 looper letters, 302 selfloop transitions, 2 changer transitions 0/305 dead transitions. [2024-12-02 07:33:05,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 305 transitions, 4247 flow [2024-12-02 07:33:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 07:33:05,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 07:33:05,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 160 transitions. [2024-12-02 07:33:05,927 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.0847457627118644 [2024-12-02 07:33:05,928 INFO L175 Difference]: Start difference. First operand has 209 places, 313 transitions, 3667 flow. Second operand 4 states and 160 transitions. [2024-12-02 07:33:05,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 305 transitions, 4247 flow [2024-12-02 07:33:05,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 305 transitions, 4047 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-12-02 07:33:05,936 INFO L231 Difference]: Finished difference. Result has 194 places, 305 transitions, 3443 flow [2024-12-02 07:33:05,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3439, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3443, PETRI_PLACES=194, PETRI_TRANSITIONS=305} [2024-12-02 07:33:05,937 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -254 predicate places. [2024-12-02 07:33:05,937 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 305 transitions, 3443 flow [2024-12-02 07:33:05,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:33:05,937 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:33:05,937 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:33:05,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-12-02 07:33:05,937 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:33:05,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:33:05,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1884495589, now seen corresponding path program 1 times [2024-12-02 07:33:05,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:33:05,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60288228] [2024-12-02 07:33:05,938 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:33:05,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:33:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:33:06,461 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 132 proven. 37 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:33:06,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:33:06,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60288228] [2024-12-02 07:33:06,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60288228] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:33:06,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163168430] [2024-12-02 07:33:06,461 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:33:06,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:33:06,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:33:06,462 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:33:06,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 07:33:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:33:07,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-12-02 07:33:07,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:33:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 156 proven. 13 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:33:07,952 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:33:08,029 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 07:33:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 156 proven. 13 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:33:08,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163168430] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:33:08,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:33:08,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2024-12-02 07:33:08,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057980812] [2024-12-02 07:33:08,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:33:08,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-12-02 07:33:08,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:33:08,281 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-12-02 07:33:08,281 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=722, Invalid=1630, Unknown=0, NotChecked=0, Total=2352 [2024-12-02 07:33:08,914 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:33:08,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 305 transitions, 3443 flow. Second operand has 49 states, 49 states have (on average 22.6734693877551) internal successors, (1111), 49 states have internal predecessors, (1111), 0 states have call successors, (0), 0 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 07:33:08,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:33:08,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:33:08,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:33:13,328 INFO L124 PetriNetUnfolderBase]: 7386/11640 cut-off events. [2024-12-02 07:33:13,328 INFO L125 PetriNetUnfolderBase]: For 1857/1857 co-relation queries the response was YES. [2024-12-02 07:33:13,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26138 conditions, 11640 events. 7386/11640 cut-off events. For 1857/1857 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 68278 event pairs, 3636 based on Foata normal form. 0/8600 useless extension candidates. Maximal degree in co-relation 24451. Up to 7397 conditions per place. [2024-12-02 07:33:13,373 INFO L140 encePairwiseOnDemand]: 450/472 looper letters, 302 selfloop transitions, 168 changer transitions 0/471 dead transitions. [2024-12-02 07:33:13,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 471 transitions, 5667 flow [2024-12-02 07:33:13,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-12-02 07:33:13,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-12-02 07:33:13,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1082 transitions. [2024-12-02 07:33:13,377 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.07394751230180427 [2024-12-02 07:33:13,377 INFO L175 Difference]: Start difference. First operand has 194 places, 305 transitions, 3443 flow. Second operand 31 states and 1082 transitions. [2024-12-02 07:33:13,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 471 transitions, 5667 flow [2024-12-02 07:33:13,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 471 transitions, 5664 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 07:33:13,389 INFO L231 Difference]: Finished difference. Result has 225 places, 309 transitions, 3805 flow [2024-12-02 07:33:13,389 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3440, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3805, PETRI_PLACES=225, PETRI_TRANSITIONS=309} [2024-12-02 07:33:13,390 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -223 predicate places. [2024-12-02 07:33:13,390 INFO L471 AbstractCegarLoop]: Abstraction has has 225 places, 309 transitions, 3805 flow [2024-12-02 07:33:13,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 22.6734693877551) internal successors, (1111), 49 states have internal predecessors, (1111), 0 states have call successors, (0), 0 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 07:33:13,390 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:33:13,390 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:33:13,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 07:33:13,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-12-02 07:33:13,591 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:33:13,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:33:13,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1884495593, now seen corresponding path program 1 times [2024-12-02 07:33:13,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:33:13,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551561143] [2024-12-02 07:33:13,591 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:33:13,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:33:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:33:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2024-12-02 07:33:14,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:33:14,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551561143] [2024-12-02 07:33:14,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551561143] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:33:14,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029671664] [2024-12-02 07:33:14,031 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:33:14,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:33:14,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:33:14,033 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:33:14,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 07:33:15,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:33:15,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-12-02 07:33:15,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:33:15,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-12-02 07:33:15,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:33:15,646 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:33:15,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-12-02 07:33:15,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:33:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 156 proven. 182 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2024-12-02 07:33:16,426 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:33:17,380 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:33:17,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029671664] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 07:33:17,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:33:17,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [7, 31] total 53 [2024-12-02 07:33:17,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894534278] [2024-12-02 07:33:17,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:33:17,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 07:33:17,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:33:17,381 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 07:33:17,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=594, Invalid=2268, Unknown=0, NotChecked=0, Total=2862 [2024-12-02 07:33:17,764 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:33:17,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 309 transitions, 3805 flow. Second operand has 18 states, 18 states have (on average 23.22222222222222) internal successors, (418), 18 states have internal predecessors, (418), 0 states have call successors, (0), 0 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 07:33:17,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:33:17,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:33:17,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:33:21,165 INFO L124 PetriNetUnfolderBase]: 7094/11170 cut-off events. [2024-12-02 07:33:21,165 INFO L125 PetriNetUnfolderBase]: For 2613/2613 co-relation queries the response was YES. [2024-12-02 07:33:21,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26654 conditions, 11170 events. 7094/11170 cut-off events. For 2613/2613 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 64571 event pairs, 4676 based on Foata normal form. 89/8720 useless extension candidates. Maximal degree in co-relation 24851. Up to 9461 conditions per place. [2024-12-02 07:33:21,206 INFO L140 encePairwiseOnDemand]: 453/472 looper letters, 267 selfloop transitions, 95 changer transitions 0/363 dead transitions. [2024-12-02 07:33:21,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 363 transitions, 4753 flow [2024-12-02 07:33:21,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 07:33:21,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-12-02 07:33:21,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 465 transitions. [2024-12-02 07:33:21,207 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.08209745762711865 [2024-12-02 07:33:21,207 INFO L175 Difference]: Start difference. First operand has 225 places, 309 transitions, 3805 flow. Second operand 12 states and 465 transitions. [2024-12-02 07:33:21,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 363 transitions, 4753 flow [2024-12-02 07:33:21,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 363 transitions, 4446 flow, removed 0 selfloop flow, removed 26 redundant places. [2024-12-02 07:33:21,220 INFO L231 Difference]: Finished difference. Result has 211 places, 309 transitions, 3694 flow [2024-12-02 07:33:21,221 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3498, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3694, PETRI_PLACES=211, PETRI_TRANSITIONS=309} [2024-12-02 07:33:21,221 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -237 predicate places. [2024-12-02 07:33:21,221 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 309 transitions, 3694 flow [2024-12-02 07:33:21,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 23.22222222222222) internal successors, (418), 18 states have internal predecessors, (418), 0 states have call successors, (0), 0 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 07:33:21,221 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:33:21,221 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:33:21,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 07:33:21,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-12-02 07:33:21,422 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err75REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:33:21,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:33:21,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1612376235, now seen corresponding path program 1 times [2024-12-02 07:33:21,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:33:21,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734259961] [2024-12-02 07:33:21,422 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:33:21,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:33:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:33:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 132 proven. 37 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:33:21,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:33:21,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734259961] [2024-12-02 07:33:21,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734259961] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:33:21,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876977126] [2024-12-02 07:33:21,992 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:33:21,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:33:21,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:33:21,994 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:33:21,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 07:33:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:33:23,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-12-02 07:33:23,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:33:23,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-12-02 07:33:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 156 proven. 13 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:33:23,511 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:33:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:33:23,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876977126] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 07:33:23,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:33:23,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [17, 17] total 49 [2024-12-02 07:33:23,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192388357] [2024-12-02 07:33:23,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:33:23,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 07:33:23,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:33:23,993 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 07:33:23,993 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=801, Invalid=1649, Unknown=0, NotChecked=0, Total=2450 [2024-12-02 07:33:24,317 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:33:24,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 309 transitions, 3694 flow. Second operand has 18 states, 18 states have (on average 23.22222222222222) internal successors, (418), 18 states have internal predecessors, (418), 0 states have call successors, (0), 0 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 07:33:24,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:33:24,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:33:24,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:33:27,128 INFO L124 PetriNetUnfolderBase]: 7059/11186 cut-off events. [2024-12-02 07:33:27,128 INFO L125 PetriNetUnfolderBase]: For 3700/3700 co-relation queries the response was YES. [2024-12-02 07:33:27,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27086 conditions, 11186 events. 7059/11186 cut-off events. For 3700/3700 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 65653 event pairs, 4574 based on Foata normal form. 0/8804 useless extension candidates. Maximal degree in co-relation 25315. Up to 9081 conditions per place. [2024-12-02 07:33:27,157 INFO L140 encePairwiseOnDemand]: 467/472 looper letters, 351 selfloop transitions, 3 changer transitions 0/355 dead transitions. [2024-12-02 07:33:27,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 355 transitions, 4537 flow [2024-12-02 07:33:27,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:33:27,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 07:33:27,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 250 transitions. [2024-12-02 07:33:27,159 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.1059322033898305 [2024-12-02 07:33:27,159 INFO L175 Difference]: Start difference. First operand has 211 places, 309 transitions, 3694 flow. Second operand 5 states and 250 transitions. [2024-12-02 07:33:27,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 355 transitions, 4537 flow [2024-12-02 07:33:27,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 355 transitions, 4343 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-12-02 07:33:27,170 INFO L231 Difference]: Finished difference. Result has 202 places, 307 transitions, 3506 flow [2024-12-02 07:33:27,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3500, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3506, PETRI_PLACES=202, PETRI_TRANSITIONS=307} [2024-12-02 07:33:27,170 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -246 predicate places. [2024-12-02 07:33:27,170 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 307 transitions, 3506 flow [2024-12-02 07:33:27,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 23.22222222222222) internal successors, (418), 18 states have internal predecessors, (418), 0 states have call successors, (0), 0 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 07:33:27,171 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:33:27,171 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:33:27,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 07:33:27,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-12-02 07:33:27,371 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err71REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:33:27,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:33:27,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1612376231, now seen corresponding path program 1 times [2024-12-02 07:33:27,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:33:27,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254957363] [2024-12-02 07:33:27,372 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:33:27,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:33:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:33:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2024-12-02 07:33:27,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:33:27,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254957363] [2024-12-02 07:33:27,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254957363] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:33:27,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526532157] [2024-12-02 07:33:27,830 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:33:27,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:33:27,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:33:27,831 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:33:27,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 07:33:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:33:29,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-12-02 07:33:29,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:33:29,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:33:29,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-12-02 07:33:29,228 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-02 07:33:29,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-12-02 07:33:29,240 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:33:29,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-12-02 07:33:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 156 proven. 13 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:33:29,879 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:33:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:33:30,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526532157] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 07:33:30,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:33:30,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [7, 17] total 39 [2024-12-02 07:33:30,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131904522] [2024-12-02 07:33:30,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:33:30,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 07:33:30,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:33:30,583 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 07:33:30,583 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=1052, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 07:33:30,936 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:33:30,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 307 transitions, 3506 flow. Second operand has 18 states, 18 states have (on average 23.22222222222222) internal successors, (418), 18 states have internal predecessors, (418), 0 states have call successors, (0), 0 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 07:33:30,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:33:30,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:33:30,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:33:34,166 INFO L124 PetriNetUnfolderBase]: 6913/10954 cut-off events. [2024-12-02 07:33:34,166 INFO L125 PetriNetUnfolderBase]: For 2962/2962 co-relation queries the response was YES. [2024-12-02 07:33:34,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26400 conditions, 10954 events. 6913/10954 cut-off events. For 2962/2962 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 63884 event pairs, 4574 based on Foata normal form. 0/8688 useless extension candidates. Maximal degree in co-relation 24704. Up to 9081 conditions per place. [2024-12-02 07:33:34,218 INFO L140 encePairwiseOnDemand]: 455/472 looper letters, 265 selfloop transitions, 94 changer transitions 0/360 dead transitions. [2024-12-02 07:33:34,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 360 transitions, 4459 flow [2024-12-02 07:33:34,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 07:33:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-12-02 07:33:34,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 458 transitions. [2024-12-02 07:33:34,220 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.08086158192090395 [2024-12-02 07:33:34,220 INFO L175 Difference]: Start difference. First operand has 202 places, 307 transitions, 3506 flow. Second operand 12 states and 458 transitions. [2024-12-02 07:33:34,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 360 transitions, 4459 flow [2024-12-02 07:33:34,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 360 transitions, 4454 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 07:33:34,234 INFO L231 Difference]: Finished difference. Result has 209 places, 306 transitions, 3687 flow [2024-12-02 07:33:34,234 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3499, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3687, PETRI_PLACES=209, PETRI_TRANSITIONS=306} [2024-12-02 07:33:34,235 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -239 predicate places. [2024-12-02 07:33:34,235 INFO L471 AbstractCegarLoop]: Abstraction has has 209 places, 306 transitions, 3687 flow [2024-12-02 07:33:34,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 23.22222222222222) internal successors, (418), 18 states have internal predecessors, (418), 0 states have call successors, (0), 0 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 07:33:34,235 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:33:34,235 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:33:34,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-02 07:33:34,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-12-02 07:33:34,436 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:33:34,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:33:34,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1201000722, now seen corresponding path program 1 times [2024-12-02 07:33:34,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:33:34,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840320862] [2024-12-02 07:33:34,437 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:33:34,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:33:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:33:34,841 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2024-12-02 07:33:34,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:33:34,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840320862] [2024-12-02 07:33:34,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840320862] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:33:34,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421001383] [2024-12-02 07:33:34,841 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:33:34,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:33:34,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:33:34,843 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:33:34,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 07:33:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:33:36,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-12-02 07:33:36,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:33:36,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:33:36,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-12-02 07:33:36,279 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:33:36,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-12-02 07:33:36,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:33:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 156 proven. 16 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:33:36,967 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:33:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 169 proven. 3 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:33:37,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421001383] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:33:37,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:33:37,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 19, 18] total 42 [2024-12-02 07:33:37,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689834396] [2024-12-02 07:33:37,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:33:37,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-12-02 07:33:37,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:33:37,723 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-12-02 07:33:37,723 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=1240, Unknown=0, NotChecked=0, Total=1806 [2024-12-02 07:33:38,553 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 472 [2024-12-02 07:33:38,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 306 transitions, 3687 flow. Second operand has 43 states, 43 states have (on average 14.790697674418604) internal successors, (636), 43 states have internal predecessors, (636), 0 states have call successors, (0), 0 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 07:33:38,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:33:38,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 472 [2024-12-02 07:33:38,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:33:44,720 INFO L124 PetriNetUnfolderBase]: 9085/14346 cut-off events. [2024-12-02 07:33:44,721 INFO L125 PetriNetUnfolderBase]: For 4095/4095 co-relation queries the response was YES. [2024-12-02 07:33:44,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34302 conditions, 14346 events. 9085/14346 cut-off events. For 4095/4095 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 84756 event pairs, 3399 based on Foata normal form. 258/11574 useless extension candidates. Maximal degree in co-relation 32531. Up to 6980 conditions per place. [2024-12-02 07:33:44,780 INFO L140 encePairwiseOnDemand]: 451/472 looper letters, 419 selfloop transitions, 112 changer transitions 0/532 dead transitions. [2024-12-02 07:33:44,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 532 transitions, 5527 flow [2024-12-02 07:33:44,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-12-02 07:33:44,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-12-02 07:33:44,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 736 transitions. [2024-12-02 07:33:44,782 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.05569007263922518 [2024-12-02 07:33:44,782 INFO L175 Difference]: Start difference. First operand has 209 places, 306 transitions, 3687 flow. Second operand 28 states and 736 transitions. [2024-12-02 07:33:44,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 532 transitions, 5527 flow [2024-12-02 07:33:44,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 532 transitions, 5340 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-12-02 07:33:44,797 INFO L231 Difference]: Finished difference. Result has 230 places, 310 transitions, 3769 flow [2024-12-02 07:33:44,797 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3500, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3769, PETRI_PLACES=230, PETRI_TRANSITIONS=310} [2024-12-02 07:33:44,797 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -218 predicate places. [2024-12-02 07:33:44,797 INFO L471 AbstractCegarLoop]: Abstraction has has 230 places, 310 transitions, 3769 flow [2024-12-02 07:33:44,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 14.790697674418604) internal successors, (636), 43 states have internal predecessors, (636), 0 states have call successors, (0), 0 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 07:33:44,798 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:33:44,798 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:33:44,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-02 07:33:44,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:33:44,998 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err75REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:33:44,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:33:44,998 INFO L85 PathProgramCache]: Analyzing trace with hash -517273008, now seen corresponding path program 1 times [2024-12-02 07:33:44,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:33:44,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289140704] [2024-12-02 07:33:44,999 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:33:44,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:33:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:33:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2024-12-02 07:33:45,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:33:45,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289140704] [2024-12-02 07:33:45,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289140704] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:33:45,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013733318] [2024-12-02 07:33:45,560 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:33:45,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:33:45,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:33:45,562 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:33:45,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-02 07:33:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:33:46,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-12-02 07:33:46,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:33:46,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:33:47,193 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-12-02 07:33:47,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-12-02 07:33:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2024-12-02 07:33:47,873 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:33:48,680 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:33:48,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013733318] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 07:33:48,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:33:48,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [7, 31] total 53 [2024-12-02 07:33:48,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794548357] [2024-12-02 07:33:48,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:33:48,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 07:33:48,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:33:48,681 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 07:33:48,681 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=659, Invalid=2203, Unknown=0, NotChecked=0, Total=2862 [2024-12-02 07:33:49,050 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:33:49,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 310 transitions, 3769 flow. Second operand has 18 states, 18 states have (on average 23.333333333333332) internal successors, (420), 18 states have internal predecessors, (420), 0 states have call successors, (0), 0 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 07:33:49,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:33:49,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:33:49,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:33:53,227 INFO L124 PetriNetUnfolderBase]: 8969/14248 cut-off events. [2024-12-02 07:33:53,227 INFO L125 PetriNetUnfolderBase]: For 7998/7998 co-relation queries the response was YES. [2024-12-02 07:33:53,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35922 conditions, 14248 events. 8969/14248 cut-off events. For 7998/7998 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 85384 event pairs, 5908 based on Foata normal form. 0/11450 useless extension candidates. Maximal degree in co-relation 34147. Up to 11691 conditions per place. [2024-12-02 07:33:53,280 INFO L140 encePairwiseOnDemand]: 454/472 looper letters, 264 selfloop transitions, 94 changer transitions 0/359 dead transitions. [2024-12-02 07:33:53,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 359 transitions, 4751 flow [2024-12-02 07:33:53,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 07:33:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-12-02 07:33:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 452 transitions. [2024-12-02 07:33:53,282 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.07980225988700565 [2024-12-02 07:33:53,282 INFO L175 Difference]: Start difference. First operand has 230 places, 310 transitions, 3769 flow. Second operand 12 states and 452 transitions. [2024-12-02 07:33:53,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 359 transitions, 4751 flow [2024-12-02 07:33:53,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 359 transitions, 4533 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-12-02 07:33:53,300 INFO L231 Difference]: Finished difference. Result has 226 places, 308 transitions, 3751 flow [2024-12-02 07:33:53,300 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3563, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3751, PETRI_PLACES=226, PETRI_TRANSITIONS=308} [2024-12-02 07:33:53,300 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -222 predicate places. [2024-12-02 07:33:53,300 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 308 transitions, 3751 flow [2024-12-02 07:33:53,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 23.333333333333332) internal successors, (420), 18 states have internal predecessors, (420), 0 states have call successors, (0), 0 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 07:33:53,300 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:33:53,301 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:33:53,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-12-02 07:33:53,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-12-02 07:33:53,501 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err71REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:33:53,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:33:53,501 INFO L85 PathProgramCache]: Analyzing trace with hash -517273012, now seen corresponding path program 1 times [2024-12-02 07:33:53,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:33:53,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597419313] [2024-12-02 07:33:53,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:33:53,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:33:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:33:53,815 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2024-12-02 07:33:53,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:33:53,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597419313] [2024-12-02 07:33:53,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597419313] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:33:53,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463123545] [2024-12-02 07:33:53,815 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:33:53,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:33:53,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:33:53,817 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:33:53,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-02 07:33:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:33:55,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-12-02 07:33:55,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:33:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 156 proven. 13 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:33:55,386 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:33:55,468 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 07:33:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 156 proven. 13 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:33:55,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463123545] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:33:55,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:33:55,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 17, 17] total 36 [2024-12-02 07:33:55,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951335222] [2024-12-02 07:33:55,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:33:55,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-12-02 07:33:55,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:33:55,716 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-12-02 07:33:55,716 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=949, Unknown=0, NotChecked=0, Total=1332 [2024-12-02 07:33:56,235 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:33:56,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 308 transitions, 3751 flow. Second operand has 37 states, 37 states have (on average 23.08108108108108) internal successors, (854), 37 states have internal predecessors, (854), 0 states have call successors, (0), 0 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 07:33:56,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:33:56,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:33:56,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:34:01,569 INFO L124 PetriNetUnfolderBase]: 8782/13945 cut-off events. [2024-12-02 07:34:01,569 INFO L125 PetriNetUnfolderBase]: For 6204/6204 co-relation queries the response was YES. [2024-12-02 07:34:01,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34682 conditions, 13945 events. 8782/13945 cut-off events. For 6204/6204 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 83078 event pairs, 5908 based on Foata normal form. 0/11293 useless extension candidates. Maximal degree in co-relation 32907. Up to 11691 conditions per place. [2024-12-02 07:34:01,618 INFO L140 encePairwiseOnDemand]: 453/472 looper letters, 251 selfloop transitions, 164 changer transitions 0/416 dead transitions. [2024-12-02 07:34:01,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 416 transitions, 5759 flow [2024-12-02 07:34:01,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-12-02 07:34:01,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-12-02 07:34:01,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1016 transitions. [2024-12-02 07:34:01,621 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.06943685073810825 [2024-12-02 07:34:01,621 INFO L175 Difference]: Start difference. First operand has 226 places, 308 transitions, 3751 flow. Second operand 31 states and 1016 transitions. [2024-12-02 07:34:01,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 416 transitions, 5759 flow [2024-12-02 07:34:01,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 416 transitions, 5572 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-12-02 07:34:01,641 INFO L231 Difference]: Finished difference. Result has 245 places, 307 transitions, 3890 flow [2024-12-02 07:34:01,642 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3562, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3890, PETRI_PLACES=245, PETRI_TRANSITIONS=307} [2024-12-02 07:34:01,642 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -203 predicate places. [2024-12-02 07:34:01,642 INFO L471 AbstractCegarLoop]: Abstraction has has 245 places, 307 transitions, 3890 flow [2024-12-02 07:34:01,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 23.08108108108108) internal successors, (854), 37 states have internal predecessors, (854), 0 states have call successors, (0), 0 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 07:34:01,642 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:34:01,642 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:34:01,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-02 07:34:01,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-12-02 07:34:01,843 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:34:01,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:34:01,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1499349694, now seen corresponding path program 1 times [2024-12-02 07:34:01,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:34:01,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012469580] [2024-12-02 07:34:01,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:34:01,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:34:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:34:02,401 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2024-12-02 07:34:02,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:34:02,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012469580] [2024-12-02 07:34:02,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012469580] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:34:02,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643901836] [2024-12-02 07:34:02,401 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:34:02,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:34:02,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:34:02,402 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:34:02,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-02 07:34:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:34:03,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-12-02 07:34:03,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:34:03,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-12-02 07:34:03,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:34:04,088 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:34:04,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-12-02 07:34:04,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:34:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 156 proven. 185 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2024-12-02 07:34:05,049 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:34:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 169 proven. 3 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:34:06,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643901836] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:34:06,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:34:06,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 32, 18] total 56 [2024-12-02 07:34:06,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736018546] [2024-12-02 07:34:06,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:34:06,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-12-02 07:34:06,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:34:06,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-12-02 07:34:06,051 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=2570, Unknown=0, NotChecked=0, Total=3192 [2024-12-02 07:34:06,470 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 472 [2024-12-02 07:34:06,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 307 transitions, 3890 flow. Second operand has 57 states, 57 states have (on average 6.631578947368421) internal successors, (378), 57 states have internal predecessors, (378), 0 states have call successors, (0), 0 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 07:34:06,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:34:06,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 472 [2024-12-02 07:34:06,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:34:15,285 INFO L124 PetriNetUnfolderBase]: 11168/17991 cut-off events. [2024-12-02 07:34:15,285 INFO L125 PetriNetUnfolderBase]: For 8500/8500 co-relation queries the response was YES. [2024-12-02 07:34:15,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44048 conditions, 17991 events. 11168/17991 cut-off events. For 8500/8500 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 111435 event pairs, 4894 based on Foata normal form. 348/15151 useless extension candidates. Maximal degree in co-relation 42235. Up to 9745 conditions per place. [2024-12-02 07:34:15,352 INFO L140 encePairwiseOnDemand]: 451/472 looper letters, 398 selfloop transitions, 124 changer transitions 0/523 dead transitions. [2024-12-02 07:34:15,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 523 transitions, 5828 flow [2024-12-02 07:34:15,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-12-02 07:34:15,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-12-02 07:34:15,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 574 transitions. [2024-12-02 07:34:15,354 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.028954802259887006 [2024-12-02 07:34:15,354 INFO L175 Difference]: Start difference. First operand has 245 places, 307 transitions, 3890 flow. Second operand 42 states and 574 transitions. [2024-12-02 07:34:15,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 523 transitions, 5828 flow [2024-12-02 07:34:15,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 523 transitions, 5510 flow, removed 0 selfloop flow, removed 29 redundant places. [2024-12-02 07:34:15,381 INFO L231 Difference]: Finished difference. Result has 259 places, 307 transitions, 3830 flow [2024-12-02 07:34:15,381 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3560, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=3830, PETRI_PLACES=259, PETRI_TRANSITIONS=307} [2024-12-02 07:34:15,381 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -189 predicate places. [2024-12-02 07:34:15,381 INFO L471 AbstractCegarLoop]: Abstraction has has 259 places, 307 transitions, 3830 flow [2024-12-02 07:34:15,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 6.631578947368421) internal successors, (378), 57 states have internal predecessors, (378), 0 states have call successors, (0), 0 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 07:34:15,381 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:34:15,381 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:34:15,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-12-02 07:34:15,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-12-02 07:34:15,582 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:34:15,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:34:15,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1926357148, now seen corresponding path program 1 times [2024-12-02 07:34:15,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:34:15,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571696443] [2024-12-02 07:34:15,583 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:34:15,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:34:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:34:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2024-12-02 07:34:15,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:34:15,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571696443] [2024-12-02 07:34:15,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571696443] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:34:15,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747223606] [2024-12-02 07:34:15,974 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:34:15,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:34:15,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:34:15,976 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:34:15,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-12-02 07:34:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:34:17,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-12-02 07:34:17,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:34:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 156 proven. 22 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:34:17,595 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:34:17,732 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 07:34:18,040 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 156 proven. 22 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:34:18,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747223606] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:34:18,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:34:18,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 19, 19] total 43 [2024-12-02 07:34:18,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892681222] [2024-12-02 07:34:18,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:34:18,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-12-02 07:34:18,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:34:18,042 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-12-02 07:34:18,042 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=1447, Unknown=0, NotChecked=0, Total=1892 [2024-12-02 07:34:18,934 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:34:18,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 307 transitions, 3830 flow. Second operand has 44 states, 44 states have (on average 22.75) internal successors, (1001), 44 states have internal predecessors, (1001), 0 states have call successors, (0), 0 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 07:34:18,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:34:18,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:34:18,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:34:26,777 INFO L124 PetriNetUnfolderBase]: 13214/21527 cut-off events. [2024-12-02 07:34:26,777 INFO L125 PetriNetUnfolderBase]: For 13283/13283 co-relation queries the response was YES. [2024-12-02 07:34:26,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53016 conditions, 21527 events. 13214/21527 cut-off events. For 13283/13283 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 136161 event pairs, 4782 based on Foata normal form. 448/18449 useless extension candidates. Maximal degree in co-relation 51236. Up to 9369 conditions per place. [2024-12-02 07:34:26,858 INFO L140 encePairwiseOnDemand]: 451/472 looper letters, 496 selfloop transitions, 170 changer transitions 0/667 dead transitions. [2024-12-02 07:34:26,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 667 transitions, 7120 flow [2024-12-02 07:34:26,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-12-02 07:34:26,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-12-02 07:34:26,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1362 transitions. [2024-12-02 07:34:26,861 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.08015536723163842 [2024-12-02 07:34:26,861 INFO L175 Difference]: Start difference. First operand has 259 places, 307 transitions, 3830 flow. Second operand 36 states and 1362 transitions. [2024-12-02 07:34:26,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 667 transitions, 7120 flow [2024-12-02 07:34:26,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 667 transitions, 6796 flow, removed 14 selfloop flow, removed 37 redundant places. [2024-12-02 07:34:26,891 INFO L231 Difference]: Finished difference. Result has 259 places, 307 transitions, 3912 flow [2024-12-02 07:34:26,891 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3550, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=3912, PETRI_PLACES=259, PETRI_TRANSITIONS=307} [2024-12-02 07:34:26,891 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -189 predicate places. [2024-12-02 07:34:26,891 INFO L471 AbstractCegarLoop]: Abstraction has has 259 places, 307 transitions, 3912 flow [2024-12-02 07:34:26,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 22.75) internal successors, (1001), 44 states have internal predecessors, (1001), 0 states have call successors, (0), 0 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 07:34:26,892 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:34:26,892 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:34:26,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-12-02 07:34:27,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-12-02 07:34:27,092 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:34:27,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:34:27,093 INFO L85 PathProgramCache]: Analyzing trace with hash -524479803, now seen corresponding path program 1 times [2024-12-02 07:34:27,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:34:27,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474795777] [2024-12-02 07:34:27,093 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:34:27,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:34:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:34:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2024-12-02 07:34:27,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:34:27,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474795777] [2024-12-02 07:34:27,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474795777] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:34:27,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225814657] [2024-12-02 07:34:27,488 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:34:27,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:34:27,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:34:27,489 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:34:27,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-12-02 07:34:28,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:34:28,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-12-02 07:34:28,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:34:28,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-12-02 07:34:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 156 proven. 22 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:34:29,167 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:34:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 169 proven. 9 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:34:29,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225814657] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:34:29,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:34:29,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 19, 19] total 43 [2024-12-02 07:34:29,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209546959] [2024-12-02 07:34:29,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:34:29,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-12-02 07:34:29,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:34:29,752 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-12-02 07:34:29,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1421, Unknown=0, NotChecked=0, Total=1892 [2024-12-02 07:34:30,652 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 472 [2024-12-02 07:34:30,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 307 transitions, 3912 flow. Second operand has 44 states, 44 states have (on average 14.886363636363637) internal successors, (655), 44 states have internal predecessors, (655), 0 states have call successors, (0), 0 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 07:34:30,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:34:30,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 472 [2024-12-02 07:34:30,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:34:39,884 INFO L124 PetriNetUnfolderBase]: 16150/26215 cut-off events. [2024-12-02 07:34:39,884 INFO L125 PetriNetUnfolderBase]: For 16202/16202 co-relation queries the response was YES. [2024-12-02 07:34:39,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64722 conditions, 26215 events. 16150/26215 cut-off events. For 16202/16202 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 168083 event pairs, 5580 based on Foata normal form. 568/22329 useless extension candidates. Maximal degree in co-relation 62904. Up to 10967 conditions per place. [2024-12-02 07:34:40,024 INFO L140 encePairwiseOnDemand]: 450/472 looper letters, 498 selfloop transitions, 172 changer transitions 0/671 dead transitions. [2024-12-02 07:34:40,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 671 transitions, 7344 flow [2024-12-02 07:34:40,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-12-02 07:34:40,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-12-02 07:34:40,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1060 transitions. [2024-12-02 07:34:40,027 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.062382297551789076 [2024-12-02 07:34:40,027 INFO L175 Difference]: Start difference. First operand has 259 places, 307 transitions, 3912 flow. Second operand 36 states and 1060 transitions. [2024-12-02 07:34:40,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 671 transitions, 7344 flow [2024-12-02 07:34:40,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 671 transitions, 6921 flow, removed 14 selfloop flow, removed 32 redundant places. [2024-12-02 07:34:40,062 INFO L231 Difference]: Finished difference. Result has 267 places, 311 transitions, 3974 flow [2024-12-02 07:34:40,062 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3573, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=3974, PETRI_PLACES=267, PETRI_TRANSITIONS=311} [2024-12-02 07:34:40,062 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -181 predicate places. [2024-12-02 07:34:40,062 INFO L471 AbstractCegarLoop]: Abstraction has has 267 places, 311 transitions, 3974 flow [2024-12-02 07:34:40,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 14.886363636363637) internal successors, (655), 44 states have internal predecessors, (655), 0 states have call successors, (0), 0 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 07:34:40,062 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:34:40,063 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:34:40,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-12-02 07:34:40,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-12-02 07:34:40,263 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:34:40,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:34:40,263 INFO L85 PathProgramCache]: Analyzing trace with hash 665505152, now seen corresponding path program 1 times [2024-12-02 07:34:40,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:34:40,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364125509] [2024-12-02 07:34:40,264 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:34:40,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:34:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:34:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2024-12-02 07:34:40,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:34:40,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364125509] [2024-12-02 07:34:40,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364125509] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:34:40,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:34:40,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:34:40,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088100017] [2024-12-02 07:34:40,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:34:40,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:34:40,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:34:40,706 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:34:40,706 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:34:40,706 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:34:40,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 311 transitions, 3974 flow. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 07:34:40,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:34:40,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:34:40,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:34:46,998 INFO L124 PetriNetUnfolderBase]: 17222/27989 cut-off events. [2024-12-02 07:34:46,998 INFO L125 PetriNetUnfolderBase]: For 22744/22744 co-relation queries the response was YES. [2024-12-02 07:34:47,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71125 conditions, 27989 events. 17222/27989 cut-off events. For 22744/22744 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 182831 event pairs, 5576 based on Foata normal form. 1/23249 useless extension candidates. Maximal degree in co-relation 69302. Up to 24178 conditions per place. [2024-12-02 07:34:47,177 INFO L140 encePairwiseOnDemand]: 451/472 looper letters, 396 selfloop transitions, 22 changer transitions 9/428 dead transitions. [2024-12-02 07:34:47,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 428 transitions, 5201 flow [2024-12-02 07:34:47,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:34:47,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 07:34:47,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 312 transitions. [2024-12-02 07:34:47,179 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.13220338983050847 [2024-12-02 07:34:47,179 INFO L175 Difference]: Start difference. First operand has 267 places, 311 transitions, 3974 flow. Second operand 5 states and 312 transitions. [2024-12-02 07:34:47,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 428 transitions, 5201 flow [2024-12-02 07:34:47,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 428 transitions, 4819 flow, removed 16 selfloop flow, removed 33 redundant places. [2024-12-02 07:34:47,226 INFO L231 Difference]: Finished difference. Result has 241 places, 329 transitions, 3773 flow [2024-12-02 07:34:47,227 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3622, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3773, PETRI_PLACES=241, PETRI_TRANSITIONS=329} [2024-12-02 07:34:47,227 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -207 predicate places. [2024-12-02 07:34:47,227 INFO L471 AbstractCegarLoop]: Abstraction has has 241 places, 329 transitions, 3773 flow [2024-12-02 07:34:47,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 07:34:47,227 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:34:47,227 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:34:47,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-12-02 07:34:47,227 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:34:47,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:34:47,228 INFO L85 PathProgramCache]: Analyzing trace with hash 757440802, now seen corresponding path program 2 times [2024-12-02 07:34:47,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:34:47,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20505370] [2024-12-02 07:34:47,229 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:34:47,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:34:47,269 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 07:34:47,269 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:34:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2024-12-02 07:34:47,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:34:47,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20505370] [2024-12-02 07:34:47,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20505370] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:34:47,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:34:47,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:34:47,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987023098] [2024-12-02 07:34:47,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:34:47,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:34:47,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:34:47,388 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:34:47,388 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:34:47,388 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:34:47,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 329 transitions, 3773 flow. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 07:34:47,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:34:47,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:34:47,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:34:54,032 INFO L124 PetriNetUnfolderBase]: 17512/28587 cut-off events. [2024-12-02 07:34:54,032 INFO L125 PetriNetUnfolderBase]: For 21361/21361 co-relation queries the response was YES. [2024-12-02 07:34:54,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76054 conditions, 28587 events. 17512/28587 cut-off events. For 21361/21361 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 189113 event pairs, 5737 based on Foata normal form. 1/23787 useless extension candidates. Maximal degree in co-relation 75688. Up to 24888 conditions per place. [2024-12-02 07:34:54,156 INFO L140 encePairwiseOnDemand]: 451/472 looper letters, 392 selfloop transitions, 22 changer transitions 9/424 dead transitions. [2024-12-02 07:34:54,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 424 transitions, 4905 flow [2024-12-02 07:34:54,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:34:54,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 07:34:54,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 310 transitions. [2024-12-02 07:34:54,157 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.13135593220338984 [2024-12-02 07:34:54,158 INFO L175 Difference]: Start difference. First operand has 241 places, 329 transitions, 3773 flow. Second operand 5 states and 310 transitions. [2024-12-02 07:34:54,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 424 transitions, 4905 flow [2024-12-02 07:34:54,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 424 transitions, 4899 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-12-02 07:34:54,212 INFO L231 Difference]: Finished difference. Result has 246 places, 329 transitions, 3825 flow [2024-12-02 07:34:54,212 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3769, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3825, PETRI_PLACES=246, PETRI_TRANSITIONS=329} [2024-12-02 07:34:54,213 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -202 predicate places. [2024-12-02 07:34:54,213 INFO L471 AbstractCegarLoop]: Abstraction has has 246 places, 329 transitions, 3825 flow [2024-12-02 07:34:54,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 07:34:54,213 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:34:54,213 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:34:54,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-12-02 07:34:54,213 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:34:54,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:34:54,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1485941600, now seen corresponding path program 2 times [2024-12-02 07:34:54,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:34:54,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504047144] [2024-12-02 07:34:54,214 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:34:54,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:34:54,320 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:34:54,320 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:34:54,966 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2024-12-02 07:34:54,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:34:54,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504047144] [2024-12-02 07:34:54,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504047144] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:34:54,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635570351] [2024-12-02 07:34:54,966 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:34:54,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:34:54,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:34:54,968 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:34:54,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-12-02 07:34:56,375 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:34:56,375 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:34:56,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-12-02 07:34:56,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:34:56,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:34:56,746 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-12-02 07:34:56,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-12-02 07:34:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:34:57,120 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:34:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 169 proven. 30 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2024-12-02 07:34:58,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635570351] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:34:58,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:34:58,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 21, 21] total 50 [2024-12-02 07:34:58,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095201912] [2024-12-02 07:34:58,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:34:58,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-12-02 07:34:58,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:34:58,320 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-12-02 07:34:58,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=2073, Unknown=0, NotChecked=0, Total=2550 [2024-12-02 07:34:58,526 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 472 [2024-12-02 07:34:58,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 329 transitions, 3825 flow. Second operand has 51 states, 51 states have (on average 6.862745098039215) internal successors, (350), 51 states have internal predecessors, (350), 0 states have call successors, (0), 0 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 07:34:58,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:34:58,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 472 [2024-12-02 07:34:58,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:35:13,056 INFO L124 PetriNetUnfolderBase]: 24327/39695 cut-off events. [2024-12-02 07:35:13,056 INFO L125 PetriNetUnfolderBase]: For 43023/43023 co-relation queries the response was YES. [2024-12-02 07:35:13,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106092 conditions, 39695 events. 24327/39695 cut-off events. For 43023/43023 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 265243 event pairs, 6267 based on Foata normal form. 840/33594 useless extension candidates. Maximal degree in co-relation 105578. Up to 12597 conditions per place. [2024-12-02 07:35:13,278 INFO L140 encePairwiseOnDemand]: 453/472 looper letters, 783 selfloop transitions, 112 changer transitions 0/896 dead transitions. [2024-12-02 07:35:13,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 896 transitions, 8222 flow [2024-12-02 07:35:13,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-12-02 07:35:13,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-12-02 07:35:13,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 858 transitions. [2024-12-02 07:35:13,282 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.03867652362062748 [2024-12-02 07:35:13,282 INFO L175 Difference]: Start difference. First operand has 246 places, 329 transitions, 3825 flow. Second operand 47 states and 858 transitions. [2024-12-02 07:35:13,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 896 transitions, 8222 flow [2024-12-02 07:35:13,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 896 transitions, 8168 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-12-02 07:35:13,358 INFO L231 Difference]: Finished difference. Result has 296 places, 335 transitions, 4103 flow [2024-12-02 07:35:13,358 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3800, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=4103, PETRI_PLACES=296, PETRI_TRANSITIONS=335} [2024-12-02 07:35:13,359 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -152 predicate places. [2024-12-02 07:35:13,359 INFO L471 AbstractCegarLoop]: Abstraction has has 296 places, 335 transitions, 4103 flow [2024-12-02 07:35:13,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 6.862745098039215) internal successors, (350), 51 states have internal predecessors, (350), 0 states have call successors, (0), 0 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 07:35:13,359 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:35:13,359 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:35:13,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-12-02 07:35:13,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef87e6d2-e1e3-4df9-ac6c-8f7be9b952e0/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-12-02 07:35:13,560 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:35:13,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:35:13,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1737784107, now seen corresponding path program 1 times [2024-12-02 07:35:13,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:35:13,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635413746] [2024-12-02 07:35:13,560 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:35:13,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:35:13,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:35:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2024-12-02 07:35:13,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:35:13,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635413746] [2024-12-02 07:35:13,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635413746] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:35:13,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:35:13,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:35:13,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810974069] [2024-12-02 07:35:13,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:35:13,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:35:13,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:35:13,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:35:13,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:35:13,763 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:35:13,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 335 transitions, 4103 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 07:35:13,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:35:13,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:35:13,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:35:23,820 INFO L124 PetriNetUnfolderBase]: 24112/39480 cut-off events. [2024-12-02 07:35:23,820 INFO L125 PetriNetUnfolderBase]: For 54767/54767 co-relation queries the response was YES. [2024-12-02 07:35:23,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110549 conditions, 39480 events. 24112/39480 cut-off events. For 54767/54767 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 266965 event pairs, 8781 based on Foata normal form. 215/32754 useless extension candidates. Maximal degree in co-relation 108771. Up to 22311 conditions per place. [2024-12-02 07:35:24,056 INFO L140 encePairwiseOnDemand]: 469/472 looper letters, 384 selfloop transitions, 3 changer transitions 0/388 dead transitions. [2024-12-02 07:35:24,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 388 transitions, 5153 flow [2024-12-02 07:35:24,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:35:24,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:35:24,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 204 transitions. [2024-12-02 07:35:24,057 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.1440677966101695 [2024-12-02 07:35:24,057 INFO L175 Difference]: Start difference. First operand has 296 places, 335 transitions, 4103 flow. Second operand 3 states and 204 transitions. [2024-12-02 07:35:24,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 388 transitions, 5153 flow [2024-12-02 07:35:24,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 388 transitions, 4907 flow, removed 20 selfloop flow, removed 40 redundant places. [2024-12-02 07:35:24,193 INFO L231 Difference]: Finished difference. Result has 259 places, 334 transitions, 3896 flow [2024-12-02 07:35:24,193 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3885, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3896, PETRI_PLACES=259, PETRI_TRANSITIONS=334} [2024-12-02 07:35:24,194 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -189 predicate places. [2024-12-02 07:35:24,194 INFO L471 AbstractCegarLoop]: Abstraction has has 259 places, 334 transitions, 3896 flow [2024-12-02 07:35:24,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 07:35:24,194 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:35:24,194 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:35:24,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-12-02 07:35:24,194 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:35:24,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:35:24,195 INFO L85 PathProgramCache]: Analyzing trace with hash 855973886, now seen corresponding path program 1 times [2024-12-02 07:35:24,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:35:24,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178929408] [2024-12-02 07:35:24,196 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:35:24,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:35:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:35:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2024-12-02 07:35:24,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:35:24,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178929408] [2024-12-02 07:35:24,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178929408] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:35:24,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:35:24,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:35:24,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728931714] [2024-12-02 07:35:24,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:35:24,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:35:24,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:35:24,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:35:24,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:35:24,944 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:35:24,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 334 transitions, 3896 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 07:35:24,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:35:24,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:35:24,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:35:34,596 INFO L124 PetriNetUnfolderBase]: 23187/38893 cut-off events. [2024-12-02 07:35:34,596 INFO L125 PetriNetUnfolderBase]: For 48160/48160 co-relation queries the response was YES. [2024-12-02 07:35:34,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106650 conditions, 38893 events. 23187/38893 cut-off events. For 48160/48160 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 276211 event pairs, 10098 based on Foata normal form. 1291/33145 useless extension candidates. Maximal degree in co-relation 104919. Up to 34377 conditions per place. [2024-12-02 07:35:34,831 INFO L140 encePairwiseOnDemand]: 458/472 looper letters, 381 selfloop transitions, 6 changer transitions 0/388 dead transitions. [2024-12-02 07:35:34,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 388 transitions, 4837 flow [2024-12-02 07:35:34,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:35:34,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:35:34,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 218 transitions. [2024-12-02 07:35:34,832 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.153954802259887 [2024-12-02 07:35:34,832 INFO L175 Difference]: Start difference. First operand has 259 places, 334 transitions, 3896 flow. Second operand 3 states and 218 transitions. [2024-12-02 07:35:34,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 388 transitions, 4837 flow [2024-12-02 07:35:34,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 388 transitions, 4831 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 07:35:34,928 INFO L231 Difference]: Finished difference. Result has 261 places, 340 transitions, 4006 flow [2024-12-02 07:35:34,928 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3890, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4006, PETRI_PLACES=261, PETRI_TRANSITIONS=340} [2024-12-02 07:35:34,929 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -187 predicate places. [2024-12-02 07:35:34,929 INFO L471 AbstractCegarLoop]: Abstraction has has 261 places, 340 transitions, 4006 flow [2024-12-02 07:35:34,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 07:35:34,929 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:35:34,929 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:35:34,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-12-02 07:35:34,929 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:35:34,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:35:34,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1495450360, now seen corresponding path program 2 times [2024-12-02 07:35:34,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:35:34,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308608348] [2024-12-02 07:35:34,931 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:35:34,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:35:34,999 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 07:35:34,999 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:35:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2024-12-02 07:35:35,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:35:35,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308608348] [2024-12-02 07:35:35,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308608348] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:35:35,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:35:35,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:35:35,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285588938] [2024-12-02 07:35:35,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:35:35,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:35:35,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:35:35,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:35:35,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:35:35,333 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:35:35,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 340 transitions, 4006 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 07:35:35,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:35:35,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:35:35,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:35:44,329 INFO L124 PetriNetUnfolderBase]: 20258/33868 cut-off events. [2024-12-02 07:35:44,330 INFO L125 PetriNetUnfolderBase]: For 46087/46087 co-relation queries the response was YES. [2024-12-02 07:35:44,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94805 conditions, 33868 events. 20258/33868 cut-off events. For 46087/46087 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 230951 event pairs, 17065 based on Foata normal form. 109/27616 useless extension candidates. Maximal degree in co-relation 93074. Up to 30648 conditions per place. [2024-12-02 07:35:44,549 INFO L140 encePairwiseOnDemand]: 458/472 looper letters, 367 selfloop transitions, 10 changer transitions 4/382 dead transitions. [2024-12-02 07:35:44,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 382 transitions, 4893 flow [2024-12-02 07:35:44,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:35:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:35:44,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2024-12-02 07:35:44,550 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.14689265536723164 [2024-12-02 07:35:44,550 INFO L175 Difference]: Start difference. First operand has 261 places, 340 transitions, 4006 flow. Second operand 3 states and 208 transitions. [2024-12-02 07:35:44,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 382 transitions, 4893 flow [2024-12-02 07:35:44,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 382 transitions, 4889 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 07:35:44,671 INFO L231 Difference]: Finished difference. Result has 264 places, 348 transitions, 4124 flow [2024-12-02 07:35:44,671 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3978, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4124, PETRI_PLACES=264, PETRI_TRANSITIONS=348} [2024-12-02 07:35:44,672 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -184 predicate places. [2024-12-02 07:35:44,672 INFO L471 AbstractCegarLoop]: Abstraction has has 264 places, 348 transitions, 4124 flow [2024-12-02 07:35:44,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 07:35:44,672 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:35:44,672 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:35:44,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-12-02 07:35:44,672 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:35:44,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:35:44,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1024966527, now seen corresponding path program 1 times [2024-12-02 07:35:44,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:35:44,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093162336] [2024-12-02 07:35:44,673 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:35:44,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:35:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:35:45,002 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2024-12-02 07:35:45,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:35:45,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093162336] [2024-12-02 07:35:45,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093162336] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:35:45,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:35:45,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:35:45,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548259963] [2024-12-02 07:35:45,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:35:45,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:35:45,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:35:45,002 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:35:45,002 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:35:45,003 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:35:45,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 348 transitions, 4124 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 07:35:45,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:35:45,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:35:45,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:35:53,875 INFO L124 PetriNetUnfolderBase]: 19817/33097 cut-off events. [2024-12-02 07:35:53,875 INFO L125 PetriNetUnfolderBase]: For 47115/47115 co-relation queries the response was YES. [2024-12-02 07:35:54,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93583 conditions, 33097 events. 19817/33097 cut-off events. For 47115/47115 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 220300 event pairs, 5321 based on Foata normal form. 124/26940 useless extension candidates. Maximal degree in co-relation 91851. Up to 23350 conditions per place. [2024-12-02 07:35:54,162 INFO L140 encePairwiseOnDemand]: 469/472 looper letters, 384 selfloop transitions, 3 changer transitions 0/388 dead transitions. [2024-12-02 07:35:54,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 388 transitions, 5066 flow [2024-12-02 07:35:54,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:35:54,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:35:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 196 transitions. [2024-12-02 07:35:54,163 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.1384180790960452 [2024-12-02 07:35:54,163 INFO L175 Difference]: Start difference. First operand has 264 places, 348 transitions, 4124 flow. Second operand 3 states and 196 transitions. [2024-12-02 07:35:54,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 388 transitions, 5066 flow [2024-12-02 07:35:54,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 388 transitions, 5056 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 07:35:54,265 INFO L231 Difference]: Finished difference. Result has 266 places, 347 transitions, 4119 flow [2024-12-02 07:35:54,265 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=4108, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4119, PETRI_PLACES=266, PETRI_TRANSITIONS=347} [2024-12-02 07:35:54,265 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -182 predicate places. [2024-12-02 07:35:54,265 INFO L471 AbstractCegarLoop]: Abstraction has has 266 places, 347 transitions, 4119 flow [2024-12-02 07:35:54,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 07:35:54,266 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:35:54,266 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:35:54,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-12-02 07:35:54,266 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:35:54,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:35:54,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1914216105, now seen corresponding path program 2 times [2024-12-02 07:35:54,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:35:54,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647149520] [2024-12-02 07:35:54,267 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:35:54,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:35:54,327 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 07:35:54,327 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:35:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2024-12-02 07:35:54,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:35:54,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647149520] [2024-12-02 07:35:54,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647149520] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:35:54,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:35:54,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:35:54,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126170449] [2024-12-02 07:35:54,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:35:54,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:35:54,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:35:54,473 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:35:54,473 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:35:54,546 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 472 [2024-12-02 07:35:54,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 347 transitions, 4119 flow. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 07:35:54,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:35:54,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 472 [2024-12-02 07:35:54,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:36:02,634 INFO L124 PetriNetUnfolderBase]: 18311/30835 cut-off events. [2024-12-02 07:36:02,634 INFO L125 PetriNetUnfolderBase]: For 45276/45276 co-relation queries the response was YES. [2024-12-02 07:36:02,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86765 conditions, 30835 events. 18311/30835 cut-off events. For 45276/45276 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 208834 event pairs, 16944 based on Foata normal form. 567/25864 useless extension candidates. Maximal degree in co-relation 85031. Up to 30467 conditions per place. [2024-12-02 07:36:02,814 INFO L140 encePairwiseOnDemand]: 467/472 looper letters, 330 selfloop transitions, 12 changer transitions 0/343 dead transitions. [2024-12-02 07:36:02,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 343 transitions, 4767 flow [2024-12-02 07:36:02,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:36:02,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 07:36:02,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-12-02 07:36:02,815 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.06779661016949153 [2024-12-02 07:36:02,815 INFO L175 Difference]: Start difference. First operand has 266 places, 347 transitions, 4119 flow. Second operand 5 states and 160 transitions. [2024-12-02 07:36:02,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 343 transitions, 4767 flow [2024-12-02 07:36:02,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 343 transitions, 4745 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-12-02 07:36:02,908 INFO L231 Difference]: Finished difference. Result has 262 places, 343 transitions, 4085 flow [2024-12-02 07:36:02,909 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=4061, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4085, PETRI_PLACES=262, PETRI_TRANSITIONS=343} [2024-12-02 07:36:02,909 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -186 predicate places. [2024-12-02 07:36:02,909 INFO L471 AbstractCegarLoop]: Abstraction has has 262 places, 343 transitions, 4085 flow [2024-12-02 07:36:02,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 07:36:02,909 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:36:02,909 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:36:02,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-12-02 07:36:02,910 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:36:02,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:36:02,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1891133054, now seen corresponding path program 1 times [2024-12-02 07:36:02,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:36:02,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841857521] [2024-12-02 07:36:02,911 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:36:02,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:36:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:36:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2024-12-02 07:36:03,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:36:03,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841857521] [2024-12-02 07:36:03,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841857521] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:36:03,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:36:03,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:36:03,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24915926] [2024-12-02 07:36:03,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:36:03,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:36:03,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:36:03,406 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:36:03,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:36:03,406 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:36:03,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 343 transitions, 4085 flow. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 07:36:03,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:36:03,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:36:03,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:36:11,666 INFO L124 PetriNetUnfolderBase]: 18448/31116 cut-off events. [2024-12-02 07:36:11,666 INFO L125 PetriNetUnfolderBase]: For 35853/35853 co-relation queries the response was YES. [2024-12-02 07:36:11,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86163 conditions, 31116 events. 18448/31116 cut-off events. For 35853/35853 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 210335 event pairs, 7181 based on Foata normal form. 1/25544 useless extension candidates. Maximal degree in co-relation 84433. Up to 28150 conditions per place. [2024-12-02 07:36:11,840 INFO L140 encePairwiseOnDemand]: 453/472 looper letters, 385 selfloop transitions, 29 changer transitions 9/424 dead transitions. [2024-12-02 07:36:11,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 424 transitions, 5154 flow [2024-12-02 07:36:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:36:11,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 07:36:11,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 298 transitions. [2024-12-02 07:36:11,841 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.12627118644067797 [2024-12-02 07:36:11,841 INFO L175 Difference]: Start difference. First operand has 262 places, 343 transitions, 4085 flow. Second operand 5 states and 298 transitions. [2024-12-02 07:36:11,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 424 transitions, 5154 flow [2024-12-02 07:36:11,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 424 transitions, 5131 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 07:36:11,941 INFO L231 Difference]: Finished difference. Result has 265 places, 343 transitions, 4129 flow [2024-12-02 07:36:11,941 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=4062, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4129, PETRI_PLACES=265, PETRI_TRANSITIONS=343} [2024-12-02 07:36:11,941 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -183 predicate places. [2024-12-02 07:36:11,942 INFO L471 AbstractCegarLoop]: Abstraction has has 265 places, 343 transitions, 4129 flow [2024-12-02 07:36:11,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 07:36:11,942 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:36:11,942 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:36:11,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-12-02 07:36:11,942 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:36:11,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:36:11,943 INFO L85 PathProgramCache]: Analyzing trace with hash 2086924246, now seen corresponding path program 2 times [2024-12-02 07:36:11,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:36:11,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729689435] [2024-12-02 07:36:11,943 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:36:11,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:36:12,001 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 07:36:12,002 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:36:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2024-12-02 07:36:12,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:36:12,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729689435] [2024-12-02 07:36:12,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729689435] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:36:12,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:36:12,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:36:12,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501632046] [2024-12-02 07:36:12,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:36:12,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:36:12,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:36:12,255 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:36:12,255 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:36:12,255 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:36:12,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 343 transitions, 4129 flow. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 07:36:12,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:36:12,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:36:12,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:36:20,728 INFO L124 PetriNetUnfolderBase]: 18550/31329 cut-off events. [2024-12-02 07:36:20,728 INFO L125 PetriNetUnfolderBase]: For 38029/38029 co-relation queries the response was YES. [2024-12-02 07:36:20,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87359 conditions, 31329 events. 18550/31329 cut-off events. For 38029/38029 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 212440 event pairs, 7190 based on Foata normal form. 1/25729 useless extension candidates. Maximal degree in co-relation 86939. Up to 28406 conditions per place. [2024-12-02 07:36:20,956 INFO L140 encePairwiseOnDemand]: 453/472 looper letters, 383 selfloop transitions, 29 changer transitions 9/422 dead transitions. [2024-12-02 07:36:20,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 422 transitions, 5192 flow [2024-12-02 07:36:20,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:36:20,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 07:36:20,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 296 transitions. [2024-12-02 07:36:20,958 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.12542372881355932 [2024-12-02 07:36:20,958 INFO L175 Difference]: Start difference. First operand has 265 places, 343 transitions, 4129 flow. Second operand 5 states and 296 transitions. [2024-12-02 07:36:20,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 422 transitions, 5192 flow [2024-12-02 07:36:21,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 422 transitions, 5157 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-12-02 07:36:21,081 INFO L231 Difference]: Finished difference. Result has 268 places, 343 transitions, 4163 flow [2024-12-02 07:36:21,081 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=4096, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4163, PETRI_PLACES=268, PETRI_TRANSITIONS=343} [2024-12-02 07:36:21,081 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -180 predicate places. [2024-12-02 07:36:21,081 INFO L471 AbstractCegarLoop]: Abstraction has has 268 places, 343 transitions, 4163 flow [2024-12-02 07:36:21,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 07:36:21,081 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:36:21,081 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:36:21,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-12-02 07:36:21,082 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:36:21,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:36:21,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1335384834, now seen corresponding path program 1 times [2024-12-02 07:36:21,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:36:21,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936303965] [2024-12-02 07:36:21,082 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:36:21,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:36:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:36:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2024-12-02 07:36:21,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:36:21,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936303965] [2024-12-02 07:36:21,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936303965] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:36:21,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:36:21,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:36:21,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46407870] [2024-12-02 07:36:21,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:36:21,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:36:21,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:36:21,696 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:36:21,697 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:36:21,697 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:36:21,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 343 transitions, 4163 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:36:21,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:36:21,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:36:21,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:36:30,143 INFO L124 PetriNetUnfolderBase]: 18532/31300 cut-off events. [2024-12-02 07:36:30,143 INFO L125 PetriNetUnfolderBase]: For 38848/38848 co-relation queries the response was YES. [2024-12-02 07:36:30,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87904 conditions, 31300 events. 18532/31300 cut-off events. For 38848/38848 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 213043 event pairs, 16439 based on Foata normal form. 9/25708 useless extension candidates. Maximal degree in co-relation 87482. Up to 29602 conditions per place. [2024-12-02 07:36:30,339 INFO L140 encePairwiseOnDemand]: 468/472 looper letters, 374 selfloop transitions, 4 changer transitions 30/409 dead transitions. [2024-12-02 07:36:30,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 409 transitions, 5274 flow [2024-12-02 07:36:30,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:36:30,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:36:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2024-12-02 07:36:30,340 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.14689265536723164 [2024-12-02 07:36:30,341 INFO L175 Difference]: Start difference. First operand has 268 places, 343 transitions, 4163 flow. Second operand 3 states and 208 transitions. [2024-12-02 07:36:30,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 409 transitions, 5274 flow [2024-12-02 07:36:30,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 409 transitions, 5239 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-12-02 07:36:30,443 INFO L231 Difference]: Finished difference. Result has 268 places, 341 transitions, 4118 flow [2024-12-02 07:36:30,443 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=4130, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4118, PETRI_PLACES=268, PETRI_TRANSITIONS=341} [2024-12-02 07:36:30,443 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -180 predicate places. [2024-12-02 07:36:30,444 INFO L471 AbstractCegarLoop]: Abstraction has has 268 places, 341 transitions, 4118 flow [2024-12-02 07:36:30,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:36:30,444 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:36:30,444 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:36:30,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-12-02 07:36:30,444 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:36:30,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:36:30,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1362390808, now seen corresponding path program 2 times [2024-12-02 07:36:30,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:36:30,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584050195] [2024-12-02 07:36:30,446 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:36:30,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:36:30,499 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 07:36:30,499 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:36:30,634 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2024-12-02 07:36:30,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:36:30,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584050195] [2024-12-02 07:36:30,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584050195] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:36:30,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:36:30,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:36:30,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734096009] [2024-12-02 07:36:30,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:36:30,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:36:30,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:36:30,635 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:36:30,635 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:36:30,636 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:36:30,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 341 transitions, 4118 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:36:30,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:36:30,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:36:30,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:36:38,677 INFO L124 PetriNetUnfolderBase]: 17602/29675 cut-off events. [2024-12-02 07:36:38,677 INFO L125 PetriNetUnfolderBase]: For 39022/39022 co-relation queries the response was YES. [2024-12-02 07:36:38,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82923 conditions, 29675 events. 17602/29675 cut-off events. For 39022/39022 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 199494 event pairs, 7046 based on Foata normal form. 238/24465 useless extension candidates. Maximal degree in co-relation 82881. Up to 28339 conditions per place. [2024-12-02 07:36:38,848 INFO L140 encePairwiseOnDemand]: 456/472 looper letters, 351 selfloop transitions, 14 changer transitions 0/366 dead transitions. [2024-12-02 07:36:38,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 366 transitions, 4853 flow [2024-12-02 07:36:38,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:36:38,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:36:38,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2024-12-02 07:36:38,849 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.1419491525423729 [2024-12-02 07:36:38,849 INFO L175 Difference]: Start difference. First operand has 268 places, 341 transitions, 4118 flow. Second operand 3 states and 201 transitions. [2024-12-02 07:36:38,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 366 transitions, 4853 flow [2024-12-02 07:36:38,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 366 transitions, 4849 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-12-02 07:36:38,953 INFO L231 Difference]: Finished difference. Result has 268 places, 337 transitions, 4088 flow [2024-12-02 07:36:38,953 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=4060, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4088, PETRI_PLACES=268, PETRI_TRANSITIONS=337} [2024-12-02 07:36:38,953 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -180 predicate places. [2024-12-02 07:36:38,953 INFO L471 AbstractCegarLoop]: Abstraction has has 268 places, 337 transitions, 4088 flow [2024-12-02 07:36:38,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:36:38,954 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:36:38,954 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:36:38,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-12-02 07:36:38,954 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:36:38,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:36:38,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1271808842, now seen corresponding path program 1 times [2024-12-02 07:36:38,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:36:38,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189282070] [2024-12-02 07:36:38,955 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:36:38,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:36:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:36:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2024-12-02 07:36:39,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:36:39,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189282070] [2024-12-02 07:36:39,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189282070] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:36:39,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:36:39,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:36:39,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230829927] [2024-12-02 07:36:39,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:36:39,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:36:39,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:36:39,641 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:36:39,641 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:36:39,641 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:36:39,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 337 transitions, 4088 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 07:36:39,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:36:39,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:36:39,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:36:48,466 INFO L124 PetriNetUnfolderBase]: 17782/30086 cut-off events. [2024-12-02 07:36:48,466 INFO L125 PetriNetUnfolderBase]: For 33849/33849 co-relation queries the response was YES. [2024-12-02 07:36:48,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83832 conditions, 30086 events. 17782/30086 cut-off events. For 33849/33849 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 203591 event pairs, 16118 based on Foata normal form. 54/24629 useless extension candidates. Maximal degree in co-relation 83790. Up to 28900 conditions per place. [2024-12-02 07:36:48,681 INFO L140 encePairwiseOnDemand]: 462/472 looper letters, 362 selfloop transitions, 12 changer transitions 10/385 dead transitions. [2024-12-02 07:36:48,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 385 transitions, 4987 flow [2024-12-02 07:36:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:36:48,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:36:48,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2024-12-02 07:36:48,683 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.1483050847457627 [2024-12-02 07:36:48,683 INFO L175 Difference]: Start difference. First operand has 268 places, 337 transitions, 4088 flow. Second operand 3 states and 210 transitions. [2024-12-02 07:36:48,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 385 transitions, 4987 flow [2024-12-02 07:36:48,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 385 transitions, 4939 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-12-02 07:36:48,759 INFO L231 Difference]: Finished difference. Result has 270 places, 341 transitions, 4140 flow [2024-12-02 07:36:48,759 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=4040, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4140, PETRI_PLACES=270, PETRI_TRANSITIONS=341} [2024-12-02 07:36:48,759 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -178 predicate places. [2024-12-02 07:36:48,759 INFO L471 AbstractCegarLoop]: Abstraction has has 270 places, 341 transitions, 4140 flow [2024-12-02 07:36:48,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 07:36:48,759 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:36:48,759 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:36:48,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-12-02 07:36:48,759 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:36:48,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:36:48,760 INFO L85 PathProgramCache]: Analyzing trace with hash 870396480, now seen corresponding path program 2 times [2024-12-02 07:36:48,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:36:48,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856051277] [2024-12-02 07:36:48,760 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:36:48,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:36:48,817 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 07:36:48,817 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:36:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2024-12-02 07:36:49,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:36:49,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856051277] [2024-12-02 07:36:49,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856051277] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:36:49,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:36:49,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:36:49,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644923636] [2024-12-02 07:36:49,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:36:49,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:36:49,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:36:49,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:36:49,060 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:36:49,060 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:36:49,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 341 transitions, 4140 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 07:36:49,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:36:49,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:36:49,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:36:57,592 INFO L124 PetriNetUnfolderBase]: 17534/29662 cut-off events. [2024-12-02 07:36:57,593 INFO L125 PetriNetUnfolderBase]: For 34033/34033 co-relation queries the response was YES. [2024-12-02 07:36:57,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82193 conditions, 29662 events. 17534/29662 cut-off events. For 34033/34033 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 199945 event pairs, 15197 based on Foata normal form. 118/24287 useless extension candidates. Maximal degree in co-relation 82150. Up to 26696 conditions per place. [2024-12-02 07:36:57,792 INFO L140 encePairwiseOnDemand]: 462/472 looper letters, 351 selfloop transitions, 6 changer transitions 9/367 dead transitions. [2024-12-02 07:36:57,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 367 transitions, 4829 flow [2024-12-02 07:36:57,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:36:57,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:36:57,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2024-12-02 07:36:57,793 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.14124293785310735 [2024-12-02 07:36:57,793 INFO L175 Difference]: Start difference. First operand has 270 places, 341 transitions, 4140 flow. Second operand 3 states and 200 transitions. [2024-12-02 07:36:57,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 367 transitions, 4829 flow [2024-12-02 07:36:57,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 367 transitions, 4811 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-12-02 07:36:57,900 INFO L231 Difference]: Finished difference. Result has 271 places, 333 transitions, 4020 flow [2024-12-02 07:36:57,900 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=4008, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4020, PETRI_PLACES=271, PETRI_TRANSITIONS=333} [2024-12-02 07:36:57,901 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -177 predicate places. [2024-12-02 07:36:57,901 INFO L471 AbstractCegarLoop]: Abstraction has has 271 places, 333 transitions, 4020 flow [2024-12-02 07:36:57,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 07:36:57,901 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:36:57,901 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:36:57,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-12-02 07:36:57,901 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:36:57,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:36:57,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1145062629, now seen corresponding path program 1 times [2024-12-02 07:36:57,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:36:57,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517464010] [2024-12-02 07:36:57,902 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:36:57,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:36:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:36:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2024-12-02 07:36:58,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:36:58,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517464010] [2024-12-02 07:36:58,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517464010] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:36:58,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:36:58,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:36:58,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762403895] [2024-12-02 07:36:58,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:36:58,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:36:58,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:36:58,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:36:58,831 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:36:58,832 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:36:58,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 333 transitions, 4020 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 07:36:58,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:36:58,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:36:58,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:37:07,224 INFO L124 PetriNetUnfolderBase]: 17475/29603 cut-off events. [2024-12-02 07:37:07,224 INFO L125 PetriNetUnfolderBase]: For 32079/32079 co-relation queries the response was YES. [2024-12-02 07:37:07,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81958 conditions, 29603 events. 17475/29603 cut-off events. For 32079/32079 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 199906 event pairs, 15166 based on Foata normal form. 59/24169 useless extension candidates. Maximal degree in co-relation 81915. Up to 26644 conditions per place. [2024-12-02 07:37:07,386 INFO L140 encePairwiseOnDemand]: 462/472 looper letters, 347 selfloop transitions, 12 changer transitions 9/369 dead transitions. [2024-12-02 07:37:07,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 369 transitions, 4839 flow [2024-12-02 07:37:07,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:37:07,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:37:07,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2024-12-02 07:37:07,387 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.14124293785310735 [2024-12-02 07:37:07,387 INFO L175 Difference]: Start difference. First operand has 271 places, 333 transitions, 4020 flow. Second operand 3 states and 200 transitions. [2024-12-02 07:37:07,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 369 transitions, 4839 flow [2024-12-02 07:37:07,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 369 transitions, 4799 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-12-02 07:37:07,483 INFO L231 Difference]: Finished difference. Result has 270 places, 335 transitions, 4056 flow [2024-12-02 07:37:07,483 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3938, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4056, PETRI_PLACES=270, PETRI_TRANSITIONS=335} [2024-12-02 07:37:07,484 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -178 predicate places. [2024-12-02 07:37:07,484 INFO L471 AbstractCegarLoop]: Abstraction has has 270 places, 335 transitions, 4056 flow [2024-12-02 07:37:07,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 07:37:07,484 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:37:07,484 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:07,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-12-02 07:37:07,484 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:37:07,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:07,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1964824015, now seen corresponding path program 2 times [2024-12-02 07:37:07,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:07,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576224115] [2024-12-02 07:37:07,485 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:37:07,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:07,536 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 07:37:07,536 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:37:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2024-12-02 07:37:07,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:07,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576224115] [2024-12-02 07:37:07,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576224115] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:37:07,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:37:07,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:37:07,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501727563] [2024-12-02 07:37:07,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:37:07,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:37:07,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:07,797 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:37:07,797 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:37:07,797 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:37:07,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 335 transitions, 4056 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 07:37:07,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:37:07,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:37:07,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:37:15,740 INFO L124 PetriNetUnfolderBase]: 17373/29387 cut-off events. [2024-12-02 07:37:15,740 INFO L125 PetriNetUnfolderBase]: For 32898/32898 co-relation queries the response was YES. [2024-12-02 07:37:15,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80971 conditions, 29387 events. 17373/29387 cut-off events. For 32898/32898 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 197701 event pairs, 16037 based on Foata normal form. 27/23930 useless extension candidates. Maximal degree in co-relation 80931. Up to 28683 conditions per place. [2024-12-02 07:37:15,918 INFO L140 encePairwiseOnDemand]: 462/472 looper letters, 345 selfloop transitions, 2 changer transitions 15/363 dead transitions. [2024-12-02 07:37:15,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 363 transitions, 4773 flow [2024-12-02 07:37:15,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:37:15,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:37:15,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 198 transitions. [2024-12-02 07:37:15,920 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.13983050847457626 [2024-12-02 07:37:15,920 INFO L175 Difference]: Start difference. First operand has 270 places, 335 transitions, 4056 flow. Second operand 3 states and 198 transitions. [2024-12-02 07:37:15,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 363 transitions, 4773 flow [2024-12-02 07:37:16,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 363 transitions, 4767 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 07:37:16,023 INFO L231 Difference]: Finished difference. Result has 271 places, 327 transitions, 3950 flow [2024-12-02 07:37:16,024 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3972, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3950, PETRI_PLACES=271, PETRI_TRANSITIONS=327} [2024-12-02 07:37:16,024 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -177 predicate places. [2024-12-02 07:37:16,024 INFO L471 AbstractCegarLoop]: Abstraction has has 271 places, 327 transitions, 3950 flow [2024-12-02 07:37:16,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 07:37:16,024 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:37:16,024 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:16,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-12-02 07:37:16,024 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:37:16,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:16,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1050864219, now seen corresponding path program 1 times [2024-12-02 07:37:16,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:16,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846466432] [2024-12-02 07:37:16,025 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:16,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2024-12-02 07:37:16,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:16,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846466432] [2024-12-02 07:37:16,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846466432] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:37:16,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:37:16,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:37:16,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094935994] [2024-12-02 07:37:16,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:37:16,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:37:16,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:16,146 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:37:16,147 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:37:16,147 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:37:16,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 327 transitions, 3950 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 07:37:16,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:37:16,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:37:16,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:37:23,640 INFO L124 PetriNetUnfolderBase]: 17155/29039 cut-off events. [2024-12-02 07:37:23,640 INFO L125 PetriNetUnfolderBase]: For 31737/31737 co-relation queries the response was YES. [2024-12-02 07:37:23,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79637 conditions, 29039 events. 17155/29039 cut-off events. For 31737/31737 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 195206 event pairs, 15273 based on Foata normal form. 41/23650 useless extension candidates. Maximal degree in co-relation 79597. Up to 26975 conditions per place. [2024-12-02 07:37:23,778 INFO L140 encePairwiseOnDemand]: 466/472 looper letters, 334 selfloop transitions, 6 changer transitions 18/359 dead transitions. [2024-12-02 07:37:23,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 359 transitions, 4709 flow [2024-12-02 07:37:23,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:37:23,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:37:23,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 194 transitions. [2024-12-02 07:37:23,779 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.1370056497175141 [2024-12-02 07:37:23,779 INFO L175 Difference]: Start difference. First operand has 271 places, 327 transitions, 3950 flow. Second operand 3 states and 194 transitions. [2024-12-02 07:37:23,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 359 transitions, 4709 flow [2024-12-02 07:37:23,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 359 transitions, 4649 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-12-02 07:37:23,867 INFO L231 Difference]: Finished difference. Result has 266 places, 325 transitions, 3884 flow [2024-12-02 07:37:23,868 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3846, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3884, PETRI_PLACES=266, PETRI_TRANSITIONS=325} [2024-12-02 07:37:23,868 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -182 predicate places. [2024-12-02 07:37:23,868 INFO L471 AbstractCegarLoop]: Abstraction has has 266 places, 325 transitions, 3884 flow [2024-12-02 07:37:23,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 07:37:23,868 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:37:23,868 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:23,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-12-02 07:37:23,868 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:37:23,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:23,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1003160471, now seen corresponding path program 2 times [2024-12-02 07:37:23,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:23,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115763764] [2024-12-02 07:37:23,869 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:37:23,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:23,917 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 07:37:23,918 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:37:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2024-12-02 07:37:23,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:23,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115763764] [2024-12-02 07:37:23,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115763764] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:37:23,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:37:23,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:37:23,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267164774] [2024-12-02 07:37:23,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:37:23,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:37:23,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:23,948 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:37:23,948 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:37:23,948 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:37:23,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 325 transitions, 3884 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 07:37:23,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:37:23,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:37:23,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:37:31,470 INFO L124 PetriNetUnfolderBase]: 17091/28913 cut-off events. [2024-12-02 07:37:31,470 INFO L125 PetriNetUnfolderBase]: For 30628/30628 co-relation queries the response was YES. [2024-12-02 07:37:31,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78405 conditions, 28913 events. 17091/28913 cut-off events. For 30628/30628 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 193727 event pairs, 15981 based on Foata normal form. 9/23501 useless extension candidates. Maximal degree in co-relation 78369. Up to 28544 conditions per place. [2024-12-02 07:37:31,630 INFO L140 encePairwiseOnDemand]: 468/472 looper letters, 320 selfloop transitions, 0 changer transitions 34/355 dead transitions. [2024-12-02 07:37:31,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 355 transitions, 4636 flow [2024-12-02 07:37:31,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:37:31,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:37:31,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 188 transitions. [2024-12-02 07:37:31,631 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.1327683615819209 [2024-12-02 07:37:31,631 INFO L175 Difference]: Start difference. First operand has 266 places, 325 transitions, 3884 flow. Second operand 3 states and 188 transitions. [2024-12-02 07:37:31,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 355 transitions, 4636 flow [2024-12-02 07:37:31,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 355 transitions, 4622 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-12-02 07:37:31,731 INFO L231 Difference]: Finished difference. Result has 265 places, 321 transitions, 3826 flow [2024-12-02 07:37:31,731 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3848, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3826, PETRI_PLACES=265, PETRI_TRANSITIONS=321} [2024-12-02 07:37:31,731 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -183 predicate places. [2024-12-02 07:37:31,732 INFO L471 AbstractCegarLoop]: Abstraction has has 265 places, 321 transitions, 3826 flow [2024-12-02 07:37:31,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 07:37:31,732 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:37:31,732 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:31,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-12-02 07:37:31,732 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:37:31,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:31,733 INFO L85 PathProgramCache]: Analyzing trace with hash -885206253, now seen corresponding path program 1 times [2024-12-02 07:37:31,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:31,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267854535] [2024-12-02 07:37:31,733 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:31,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2024-12-02 07:37:31,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:31,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267854535] [2024-12-02 07:37:31,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267854535] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:37:31,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:37:31,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:37:31,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585377384] [2024-12-02 07:37:31,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:37:31,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:37:31,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:31,969 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:37:31,969 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:37:31,969 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:37:31,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 321 transitions, 3826 flow. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 07:37:31,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:37:31,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:37:31,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:37:39,627 INFO L124 PetriNetUnfolderBase]: 16919/28622 cut-off events. [2024-12-02 07:37:39,627 INFO L125 PetriNetUnfolderBase]: For 29899/29899 co-relation queries the response was YES. [2024-12-02 07:37:39,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77371 conditions, 28622 events. 16919/28622 cut-off events. For 29899/29899 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 191359 event pairs, 15874 based on Foata normal form. 1/23256 useless extension candidates. Maximal degree in co-relation 77336. Up to 28347 conditions per place. [2024-12-02 07:37:39,791 INFO L140 encePairwiseOnDemand]: 469/472 looper letters, 323 selfloop transitions, 1 changer transitions 22/347 dead transitions. [2024-12-02 07:37:39,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 347 transitions, 4575 flow [2024-12-02 07:37:39,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 07:37:39,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 07:37:39,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 200 transitions. [2024-12-02 07:37:39,793 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.1059322033898305 [2024-12-02 07:37:39,793 INFO L175 Difference]: Start difference. First operand has 265 places, 321 transitions, 3826 flow. Second operand 4 states and 200 transitions. [2024-12-02 07:37:39,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 347 transitions, 4575 flow [2024-12-02 07:37:39,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 347 transitions, 4575 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-12-02 07:37:39,880 INFO L231 Difference]: Finished difference. Result has 266 places, 319 transitions, 3814 flow [2024-12-02 07:37:39,880 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3826, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3814, PETRI_PLACES=266, PETRI_TRANSITIONS=319} [2024-12-02 07:37:39,880 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -182 predicate places. [2024-12-02 07:37:39,880 INFO L471 AbstractCegarLoop]: Abstraction has has 266 places, 319 transitions, 3814 flow [2024-12-02 07:37:39,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 07:37:39,881 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:37:39,881 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:39,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-12-02 07:37:39,881 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:37:39,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:39,881 INFO L85 PathProgramCache]: Analyzing trace with hash 358307625, now seen corresponding path program 2 times [2024-12-02 07:37:39,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:39,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920820141] [2024-12-02 07:37:39,881 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:37:39,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:39,926 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 07:37:39,926 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:37:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2024-12-02 07:37:40,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:40,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920820141] [2024-12-02 07:37:40,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920820141] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:37:40,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:37:40,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:37:40,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135853799] [2024-12-02 07:37:40,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:37:40,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:37:40,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:40,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:37:40,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:37:40,139 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:37:40,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 319 transitions, 3814 flow. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 07:37:40,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:37:40,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:37:40,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:37:47,201 INFO L124 PetriNetUnfolderBase]: 16812/28428 cut-off events. [2024-12-02 07:37:47,201 INFO L125 PetriNetUnfolderBase]: For 29841/29841 co-relation queries the response was YES. [2024-12-02 07:37:47,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76915 conditions, 28428 events. 16812/28428 cut-off events. For 29841/29841 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 189740 event pairs, 15794 based on Foata normal form. 1/23092 useless extension candidates. Maximal degree in co-relation 76878. Up to 28211 conditions per place. [2024-12-02 07:37:47,335 INFO L140 encePairwiseOnDemand]: 469/472 looper letters, 316 selfloop transitions, 0 changer transitions 22/339 dead transitions. [2024-12-02 07:37:47,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 339 transitions, 4532 flow [2024-12-02 07:37:47,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 07:37:47,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 07:37:47,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 193 transitions. [2024-12-02 07:37:47,336 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.10222457627118645 [2024-12-02 07:37:47,336 INFO L175 Difference]: Start difference. First operand has 266 places, 319 transitions, 3814 flow. Second operand 4 states and 193 transitions. [2024-12-02 07:37:47,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 339 transitions, 4532 flow [2024-12-02 07:37:47,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 339 transitions, 4529 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-12-02 07:37:47,414 INFO L231 Difference]: Finished difference. Result has 267 places, 317 transitions, 3796 flow [2024-12-02 07:37:47,414 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3811, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3796, PETRI_PLACES=267, PETRI_TRANSITIONS=317} [2024-12-02 07:37:47,414 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -181 predicate places. [2024-12-02 07:37:47,414 INFO L471 AbstractCegarLoop]: Abstraction has has 267 places, 317 transitions, 3796 flow [2024-12-02 07:37:47,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 07:37:47,415 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:37:47,415 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:47,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-12-02 07:37:47,415 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:37:47,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:47,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1803477894, now seen corresponding path program 1 times [2024-12-02 07:37:47,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:47,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15510979] [2024-12-02 07:37:47,415 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:47,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2024-12-02 07:37:47,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:47,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15510979] [2024-12-02 07:37:47,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15510979] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:37:47,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:37:47,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:37:47,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915091797] [2024-12-02 07:37:47,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:37:47,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:37:47,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:47,659 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:37:47,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:37:47,659 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:37:47,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 317 transitions, 3796 flow. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 07:37:47,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:37:47,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:37:47,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:37:54,957 INFO L124 PetriNetUnfolderBase]: 16728/28288 cut-off events. [2024-12-02 07:37:54,957 INFO L125 PetriNetUnfolderBase]: For 29781/29781 co-relation queries the response was YES. [2024-12-02 07:37:55,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76507 conditions, 28288 events. 16728/28288 cut-off events. For 29781/29781 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 188631 event pairs, 15687 based on Foata normal form. 1/22976 useless extension candidates. Maximal degree in co-relation 76470. Up to 28014 conditions per place. [2024-12-02 07:37:55,136 INFO L140 encePairwiseOnDemand]: 469/472 looper letters, 319 selfloop transitions, 1 changer transitions 22/343 dead transitions. [2024-12-02 07:37:55,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 343 transitions, 4539 flow [2024-12-02 07:37:55,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 07:37:55,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 07:37:55,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 198 transitions. [2024-12-02 07:37:55,137 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.1048728813559322 [2024-12-02 07:37:55,137 INFO L175 Difference]: Start difference. First operand has 267 places, 317 transitions, 3796 flow. Second operand 4 states and 198 transitions. [2024-12-02 07:37:55,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 343 transitions, 4539 flow [2024-12-02 07:37:55,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 343 transitions, 4529 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-12-02 07:37:55,213 INFO L231 Difference]: Finished difference. Result has 264 places, 315 transitions, 3778 flow [2024-12-02 07:37:55,213 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=3788, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3778, PETRI_PLACES=264, PETRI_TRANSITIONS=315} [2024-12-02 07:37:55,213 INFO L279 CegarLoopForPetriNet]: 448 programPoint places, -184 predicate places. [2024-12-02 07:37:55,213 INFO L471 AbstractCegarLoop]: Abstraction has has 264 places, 315 transitions, 3778 flow [2024-12-02 07:37:55,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 07:37:55,214 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:37:55,214 INFO L206 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:55,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-12-02 07:37:55,214 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 721 more)] === [2024-12-02 07:37:55,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:55,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1919378220, now seen corresponding path program 2 times [2024-12-02 07:37:55,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:55,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145277979] [2024-12-02 07:37:55,215 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:37:55,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:55,262 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 07:37:55,262 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:37:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2024-12-02 07:37:55,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:55,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145277979] [2024-12-02 07:37:55,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145277979] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:37:55,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:37:55,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:37:55,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300899263] [2024-12-02 07:37:55,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:37:55,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:37:55,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:55,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:37:55,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:37:55,337 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 472 [2024-12-02 07:37:55,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 315 transitions, 3778 flow. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 07:37:55,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:37:55,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 472 [2024-12-02 07:37:55,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand