./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-opt-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_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/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_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/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_9d92ace5-a818-4868-90f5-d222a0539ec7/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 b034d85232772d264d33ccb960d3ce3e7bf57df858fd0c6fd0b22127388c3f9a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 12:49:25,405 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 12:49:25,461 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 12:49:25,466 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 12:49:25,466 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 12:49:25,488 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 12:49:25,489 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 12:49:25,489 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 12:49:25,489 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 12:49:25,489 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 12:49:25,489 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 12:49:25,490 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 12:49:25,490 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 12:49:25,490 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 12:49:25,490 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 12:49:25,490 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 12:49:25,490 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 12:49:25,491 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 12:49:25,491 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 12:49:25,491 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 12:49:25,491 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 12:49:25,491 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 12:49:25,491 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 12:49:25,491 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 12:49:25,491 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 12:49:25,491 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 12:49:25,492 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 12:49:25,492 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 12:49:25,492 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 12:49:25,492 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 12:49:25,492 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 12:49:25,492 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 12:49:25,492 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 12:49:25,492 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:49:25,492 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 12:49:25,492 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 12:49:25,493 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 12:49:25,493 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 12:49:25,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:49:25,493 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 12:49:25,493 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 12:49:25,493 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 12:49:25,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 12:49:25,493 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 12:49:25,494 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 12:49:25,494 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 12:49:25,494 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 12:49:25,494 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_9d92ace5-a818-4868-90f5-d222a0539ec7/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 -> b034d85232772d264d33ccb960d3ce3e7bf57df858fd0c6fd0b22127388c3f9a [2024-12-02 12:49:25,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 12:49:25,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 12:49:25,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 12:49:25,724 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 12:49:25,725 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 12:49:25,726 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c [2024-12-02 12:49:28,319 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/data/1ca819608/4388cf2891f44bd5ac0cf1cf77c9acd0/FLAG56b8422fb [2024-12-02 12:49:28,543 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 12:49:28,544 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c [2024-12-02 12:49:28,550 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/data/1ca819608/4388cf2891f44bd5ac0cf1cf77c9acd0/FLAG56b8422fb [2024-12-02 12:49:28,894 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/data/1ca819608/4388cf2891f44bd5ac0cf1cf77c9acd0 [2024-12-02 12:49:28,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 12:49:28,897 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 12:49:28,898 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 12:49:28,898 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 12:49:28,901 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 12:49:28,901 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:49:28" (1/1) ... [2024-12-02 12:49:28,902 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c0050ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:49:28, skipping insertion in model container [2024-12-02 12:49:28,902 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:49:28" (1/1) ... [2024-12-02 12:49:28,913 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 12:49:29,050 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 12:49:29,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 12:49:29,063 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 12:49:29,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 12:49:29,099 INFO L204 MainTranslator]: Completed translation [2024-12-02 12:49:29,100 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:49:29 WrapperNode [2024-12-02 12:49:29,100 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 12:49:29,101 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 12:49:29,101 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 12:49:29,101 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 12:49:29,107 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:49:29" (1/1) ... [2024-12-02 12:49:29,113 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:49:29" (1/1) ... [2024-12-02 12:49:29,131 INFO L138 Inliner]: procedures = 23, calls = 26, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 167 [2024-12-02 12:49:29,131 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 12:49:29,132 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 12:49:29,132 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 12:49:29,132 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 12:49:29,139 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:49:29" (1/1) ... [2024-12-02 12:49:29,139 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:49:29" (1/1) ... [2024-12-02 12:49:29,142 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:49:29" (1/1) ... [2024-12-02 12:49:29,159 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-12-02 12:49:29,159 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:49:29" (1/1) ... [2024-12-02 12:49:29,159 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:49:29" (1/1) ... [2024-12-02 12:49:29,166 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:49:29" (1/1) ... [2024-12-02 12:49:29,167 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:49:29" (1/1) ... [2024-12-02 12:49:29,171 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:49:29" (1/1) ... [2024-12-02 12:49:29,173 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:49:29" (1/1) ... [2024-12-02 12:49:29,174 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:49:29" (1/1) ... [2024-12-02 12:49:29,177 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 12:49:29,178 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 12:49:29,178 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 12:49:29,178 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 12:49:29,179 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:49:29" (1/1) ... [2024-12-02 12:49:29,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:49:29,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:49:29,209 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 12:49:29,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 12:49:29,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 12:49:29,241 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 12:49:29,241 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 12:49:29,241 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 12:49:29,241 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 12:49:29,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 12:49:29,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 12:49:29,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 12:49:29,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 12:49:29,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 12:49:29,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 12:49:29,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 12:49:29,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 12:49:29,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 12:49:29,244 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 12:49:29,323 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 12:49:29,325 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 12:49:29,639 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 12:49:29,639 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 12:49:29,816 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 12:49:29,816 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-12-02 12:49:29,816 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:49:29 BoogieIcfgContainer [2024-12-02 12:49:29,816 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 12:49:29,819 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 12:49:29,819 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 12:49:29,824 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 12:49:29,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:49:28" (1/3) ... [2024-12-02 12:49:29,825 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@407d62e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:49:29, skipping insertion in model container [2024-12-02 12:49:29,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:49:29" (2/3) ... [2024-12-02 12:49:29,825 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@407d62e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:49:29, skipping insertion in model container [2024-12-02 12:49:29,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:49:29" (3/3) ... [2024-12-02 12:49:29,827 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-chromosome-opt-symm.wvr.c [2024-12-02 12:49:29,844 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 12:49:29,846 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-chromosome-opt-symm.wvr.c that has 3 procedures, 59 locations, 1 initial locations, 4 loop locations, and 22 error locations. [2024-12-02 12:49:29,846 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 12:49:29,910 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-12-02 12:49:29,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 66 transitions, 146 flow [2024-12-02 12:49:29,972 INFO L124 PetriNetUnfolderBase]: 8/64 cut-off events. [2024-12-02 12:49:29,974 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-12-02 12:49:29,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 64 events. 8/64 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 198 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-12-02 12:49:29,978 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 66 transitions, 146 flow [2024-12-02 12:49:29,981 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 63 transitions, 138 flow [2024-12-02 12:49:29,988 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 12:49:29,999 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;@4d9f8562, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 12:49:29,999 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-12-02 12:49:30,002 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 12:49:30,003 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-12-02 12:49:30,003 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 12:49:30,003 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:30,003 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 12:49:30,004 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:49:30,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:30,008 INFO L85 PathProgramCache]: Analyzing trace with hash 535295, now seen corresponding path program 1 times [2024-12-02 12:49:30,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:30,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174406084] [2024-12-02 12:49:30,015 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:30,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:30,198 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 12:49:30,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:30,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174406084] [2024-12-02 12:49:30,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174406084] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:30,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:49:30,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-12-02 12:49:30,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215328943] [2024-12-02 12:49:30,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:30,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:49:30,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:30,228 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:49:30,228 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:49:30,280 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-12-02 12:49:30,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 12:49:30,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:30,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-12-02 12:49:30,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:30,454 INFO L124 PetriNetUnfolderBase]: 183/426 cut-off events. [2024-12-02 12:49:30,454 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-12-02 12:49:30,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 426 events. 183/426 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2151 event pairs, 100 based on Foata normal form. 1/303 useless extension candidates. Maximal degree in co-relation 667. Up to 275 conditions per place. [2024-12-02 12:49:30,459 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 28 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2024-12-02 12:49:30,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 190 flow [2024-12-02 12:49:30,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:49:30,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:49:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2024-12-02 12:49:30,470 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2024-12-02 12:49:30,472 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 138 flow. Second operand 3 states and 129 transitions. [2024-12-02 12:49:30,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 190 flow [2024-12-02 12:49:30,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 59 transitions, 182 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-02 12:49:30,479 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 126 flow [2024-12-02 12:49:30,481 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2024-12-02 12:49:30,484 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, -6 predicate places. [2024-12-02 12:49:30,484 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 126 flow [2024-12-02 12:49:30,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 12:49:30,485 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:30,485 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 12:49:30,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 12:49:30,485 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:49:30,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:30,486 INFO L85 PathProgramCache]: Analyzing trace with hash 535296, now seen corresponding path program 1 times [2024-12-02 12:49:30,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:30,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412025890] [2024-12-02 12:49:30,486 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:30,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:30,685 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 12:49:30,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:30,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412025890] [2024-12-02 12:49:30,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412025890] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:30,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:49:30,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:49:30,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139864213] [2024-12-02 12:49:30,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:30,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:49:30,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:30,687 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:49:30,688 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:49:30,773 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-12-02 12:49:30,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 12:49:30,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:30,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-12-02 12:49:30,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:30,913 INFO L124 PetriNetUnfolderBase]: 183/430 cut-off events. [2024-12-02 12:49:30,913 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-12-02 12:49:30,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 430 events. 183/430 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2161 event pairs, 100 based on Foata normal form. 1/306 useless extension candidates. Maximal degree in co-relation 697. Up to 283 conditions per place. [2024-12-02 12:49:30,917 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 32 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2024-12-02 12:49:30,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 63 transitions, 206 flow [2024-12-02 12:49:30,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:49:30,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:49:30,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 136 transitions. [2024-12-02 12:49:30,918 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6868686868686869 [2024-12-02 12:49:30,919 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 126 flow. Second operand 3 states and 136 transitions. [2024-12-02 12:49:30,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 63 transitions, 206 flow [2024-12-02 12:49:30,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 63 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 12:49:30,921 INFO L231 Difference]: Finished difference. Result has 57 places, 61 transitions, 148 flow [2024-12-02 12:49:30,921 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=57, PETRI_TRANSITIONS=61} [2024-12-02 12:49:30,922 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, -5 predicate places. [2024-12-02 12:49:30,922 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 61 transitions, 148 flow [2024-12-02 12:49:30,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 12:49:30,922 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:30,922 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-12-02 12:49:30,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 12:49:30,923 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:49:30,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:30,923 INFO L85 PathProgramCache]: Analyzing trace with hash 514436773, now seen corresponding path program 1 times [2024-12-02 12:49:30,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:30,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877388851] [2024-12-02 12:49:30,923 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:30,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:30,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:31,106 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 12:49:31,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:31,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877388851] [2024-12-02 12:49:31,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877388851] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:49:31,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326384075] [2024-12-02 12:49:31,107 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:31,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:49:31,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:49:31,109 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:49:31,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 12:49:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:31,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-12-02 12:49:31,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:49:31,220 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 12:49:31,279 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 12:49:31,280 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:49:31,360 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 12:49:31,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326384075] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:49:31,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:49:31,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-12-02 12:49:31,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053381103] [2024-12-02 12:49:31,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:49:31,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 12:49:31,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:31,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 12:49:31,362 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-12-02 12:49:31,606 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-12-02 12:49:31,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 61 transitions, 148 flow. Second operand has 9 states, 9 states have (on average 33.666666666666664) internal successors, (303), 9 states have internal predecessors, (303), 0 states have call successors, (0), 0 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 12:49:31,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:31,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-12-02 12:49:31,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:31,872 INFO L124 PetriNetUnfolderBase]: 187/446 cut-off events. [2024-12-02 12:49:31,872 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-12-02 12:49:31,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 780 conditions, 446 events. 187/446 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2194 event pairs, 100 based on Foata normal form. 2/324 useless extension candidates. Maximal degree in co-relation 729. Up to 285 conditions per place. [2024-12-02 12:49:31,876 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 38 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-12-02 12:49:31,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 79 transitions, 310 flow [2024-12-02 12:49:31,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 12:49:31,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 12:49:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 252 transitions. [2024-12-02 12:49:31,879 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-12-02 12:49:31,879 INFO L175 Difference]: Start difference. First operand has 57 places, 61 transitions, 148 flow. Second operand 6 states and 252 transitions. [2024-12-02 12:49:31,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 79 transitions, 310 flow [2024-12-02 12:49:31,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 79 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 12:49:31,882 INFO L231 Difference]: Finished difference. Result has 64 places, 71 transitions, 246 flow [2024-12-02 12:49:31,882 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=64, PETRI_TRANSITIONS=71} [2024-12-02 12:49:31,883 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2024-12-02 12:49:31,883 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 71 transitions, 246 flow [2024-12-02 12:49:31,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 33.666666666666664) internal successors, (303), 9 states have internal predecessors, (303), 0 states have call successors, (0), 0 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 12:49:31,883 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:31,883 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-12-02 12:49:31,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-12-02 12:49:32,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-12-02 12:49:32,084 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:49:32,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:32,085 INFO L85 PathProgramCache]: Analyzing trace with hash 181238292, now seen corresponding path program 2 times [2024-12-02 12:49:32,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:32,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395868382] [2024-12-02 12:49:32,085 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:49:32,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:32,105 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:49:32,105 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:49:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:49:32,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:32,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395868382] [2024-12-02 12:49:32,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395868382] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:49:32,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119721048] [2024-12-02 12:49:32,392 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:49:32,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:49:32,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:49:32,396 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:49:32,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 12:49:32,462 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:49:32,462 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:49:32,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-12-02 12:49:32,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:49:32,475 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 12:49:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:49:32,619 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:49:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:49:32,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119721048] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:49:32,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:49:32,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-12-02 12:49:32,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800860648] [2024-12-02 12:49:32,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:49:32,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 12:49:32,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:32,750 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 12:49:32,750 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-12-02 12:49:33,381 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-12-02 12:49:33,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 71 transitions, 246 flow. Second operand has 18 states, 18 states have (on average 33.833333333333336) internal successors, (609), 18 states have internal predecessors, (609), 0 states have call successors, (0), 0 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 12:49:33,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:33,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-12-02 12:49:33,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:33,744 INFO L124 PetriNetUnfolderBase]: 183/444 cut-off events. [2024-12-02 12:49:33,744 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-12-02 12:49:33,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 444 events. 183/444 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2146 event pairs, 100 based on Foata normal form. 10/332 useless extension candidates. Maximal degree in co-relation 727. Up to 275 conditions per place. [2024-12-02 12:49:33,747 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 33 selfloop transitions, 17 changer transitions 0/77 dead transitions. [2024-12-02 12:49:33,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 77 transitions, 330 flow [2024-12-02 12:49:33,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 12:49:33,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-12-02 12:49:33,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 348 transitions. [2024-12-02 12:49:33,749 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5858585858585859 [2024-12-02 12:49:33,749 INFO L175 Difference]: Start difference. First operand has 64 places, 71 transitions, 246 flow. Second operand 9 states and 348 transitions. [2024-12-02 12:49:33,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 77 transitions, 330 flow [2024-12-02 12:49:33,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 288 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-12-02 12:49:33,752 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 218 flow [2024-12-02 12:49:33,752 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=218, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2024-12-02 12:49:33,753 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 4 predicate places. [2024-12-02 12:49:33,753 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 218 flow [2024-12-02 12:49:33,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 33.833333333333336) internal successors, (609), 18 states have internal predecessors, (609), 0 states have call successors, (0), 0 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 12:49:33,754 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:33,754 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:33,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 12:49:33,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:49:33,954 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:49:33,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:33,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1509112180, now seen corresponding path program 1 times [2024-12-02 12:49:33,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:33,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689344907] [2024-12-02 12:49:33,955 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:33,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-12-02 12:49:34,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:34,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689344907] [2024-12-02 12:49:34,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689344907] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:34,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:49:34,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 12:49:34,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557406019] [2024-12-02 12:49:34,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:34,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 12:49:34,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:34,192 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 12:49:34,192 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 12:49:34,261 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 66 [2024-12-02 12:49:34,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 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 12:49:34,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:34,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 66 [2024-12-02 12:49:34,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:34,401 INFO L124 PetriNetUnfolderBase]: 260/572 cut-off events. [2024-12-02 12:49:34,402 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-12-02 12:49:34,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1054 conditions, 572 events. 260/572 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2907 event pairs, 159 based on Foata normal form. 0/470 useless extension candidates. Maximal degree in co-relation 949. Up to 396 conditions per place. [2024-12-02 12:49:34,405 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 42 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2024-12-02 12:49:34,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 65 transitions, 300 flow [2024-12-02 12:49:34,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 12:49:34,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 12:49:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-12-02 12:49:34,407 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-12-02 12:49:34,407 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 218 flow. Second operand 5 states and 162 transitions. [2024-12-02 12:49:34,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 65 transitions, 300 flow [2024-12-02 12:49:34,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 65 transitions, 268 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-12-02 12:49:34,410 INFO L231 Difference]: Finished difference. Result has 60 places, 65 transitions, 184 flow [2024-12-02 12:49:34,410 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=184, PETRI_PLACES=60, PETRI_TRANSITIONS=65} [2024-12-02 12:49:34,411 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, -2 predicate places. [2024-12-02 12:49:34,411 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 65 transitions, 184 flow [2024-12-02 12:49:34,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 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 12:49:34,411 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:34,411 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:34,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 12:49:34,412 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:49:34,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:34,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1509112181, now seen corresponding path program 1 times [2024-12-02 12:49:34,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:34,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547226008] [2024-12-02 12:49:34,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:34,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:35,086 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:49:35,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:35,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547226008] [2024-12-02 12:49:35,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547226008] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:49:35,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601368351] [2024-12-02 12:49:35,087 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:35,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:49:35,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:49:35,089 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:49:35,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 12:49:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:35,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-12-02 12:49:35,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:49:35,203 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 12:49:35,207 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 12:49:35,342 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 12:49:35,342 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 12:49:35,357 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 12:49:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:49:35,741 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:49:36,181 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:49:36,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601368351] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 12:49:36,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 12:49:36,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2024-12-02 12:49:36,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121997220] [2024-12-02 12:49:36,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:36,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 12:49:36,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:36,182 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 12:49:36,182 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-12-02 12:49:36,625 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-12-02 12:49:36,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 65 transitions, 184 flow. Second operand has 10 states, 10 states have (on average 31.8) internal successors, (318), 10 states have internal predecessors, (318), 0 states have call successors, (0), 0 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 12:49:36,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:36,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-12-02 12:49:36,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:36,825 INFO L124 PetriNetUnfolderBase]: 335/697 cut-off events. [2024-12-02 12:49:36,825 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-12-02 12:49:36,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1291 conditions, 697 events. 335/697 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3356 event pairs, 97 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 1200. Up to 324 conditions per place. [2024-12-02 12:49:36,827 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 56 selfloop transitions, 6 changer transitions 0/81 dead transitions. [2024-12-02 12:49:36,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 81 transitions, 343 flow [2024-12-02 12:49:36,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 12:49:36,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 12:49:36,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 232 transitions. [2024-12-02 12:49:36,829 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5858585858585859 [2024-12-02 12:49:36,829 INFO L175 Difference]: Start difference. First operand has 60 places, 65 transitions, 184 flow. Second operand 6 states and 232 transitions. [2024-12-02 12:49:36,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 81 transitions, 343 flow [2024-12-02 12:49:36,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 81 transitions, 338 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 12:49:36,831 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 202 flow [2024-12-02 12:49:36,831 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-12-02 12:49:36,832 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 1 predicate places. [2024-12-02 12:49:36,832 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 202 flow [2024-12-02 12:49:36,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.8) internal successors, (318), 10 states have internal predecessors, (318), 0 states have call successors, (0), 0 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 12:49:36,832 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:36,832 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:36,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 12:49:37,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:49:37,033 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:49:37,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:37,034 INFO L85 PathProgramCache]: Analyzing trace with hash -462162150, now seen corresponding path program 1 times [2024-12-02 12:49:37,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:37,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126486960] [2024-12-02 12:49:37,034 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:37,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-12-02 12:49:37,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:37,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126486960] [2024-12-02 12:49:37,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126486960] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:37,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:49:37,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 12:49:37,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408162767] [2024-12-02 12:49:37,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:37,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:49:37,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:37,110 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:49:37,110 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:49:37,144 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 66 [2024-12-02 12:49:37,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 12:49:37,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:37,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 66 [2024-12-02 12:49:37,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:37,252 INFO L124 PetriNetUnfolderBase]: 359/714 cut-off events. [2024-12-02 12:49:37,252 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2024-12-02 12:49:37,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1469 conditions, 714 events. 359/714 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3349 event pairs, 237 based on Foata normal form. 0/663 useless extension candidates. Maximal degree in co-relation 1375. Up to 556 conditions per place. [2024-12-02 12:49:37,256 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 43 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2024-12-02 12:49:37,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 61 transitions, 284 flow [2024-12-02 12:49:37,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:49:37,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 12:49:37,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-12-02 12:49:37,258 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5189393939393939 [2024-12-02 12:49:37,258 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 202 flow. Second operand 4 states and 137 transitions. [2024-12-02 12:49:37,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 61 transitions, 284 flow [2024-12-02 12:49:37,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 61 transitions, 276 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-02 12:49:37,261 INFO L231 Difference]: Finished difference. Result has 58 places, 61 transitions, 190 flow [2024-12-02 12:49:37,261 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=58, PETRI_TRANSITIONS=61} [2024-12-02 12:49:37,262 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, -4 predicate places. [2024-12-02 12:49:37,262 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 61 transitions, 190 flow [2024-12-02 12:49:37,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 12:49:37,262 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:37,262 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:37,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-12-02 12:49:37,263 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:49:37,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:37,263 INFO L85 PathProgramCache]: Analyzing trace with hash -462162149, now seen corresponding path program 1 times [2024-12-02 12:49:37,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:37,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939463601] [2024-12-02 12:49:37,263 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:37,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:37,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:49:37,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:37,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939463601] [2024-12-02 12:49:37,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939463601] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:49:37,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976494710] [2024-12-02 12:49:37,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:37,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:49:37,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:49:37,593 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:49:37,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 12:49:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:37,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 12:49:37,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:49:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:49:37,847 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:49:37,918 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 12:49:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:49:38,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976494710] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:49:38,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:49:38,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-12-02 12:49:38,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925344201] [2024-12-02 12:49:38,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:49:38,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-12-02 12:49:38,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:38,025 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-12-02 12:49:38,025 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-12-02 12:49:38,878 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-12-02 12:49:38,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 190 flow. Second operand has 25 states, 25 states have (on average 32.88) internal successors, (822), 25 states have internal predecessors, (822), 0 states have call successors, (0), 0 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 12:49:38,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:38,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-12-02 12:49:38,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:39,338 INFO L124 PetriNetUnfolderBase]: 533/1046 cut-off events. [2024-12-02 12:49:39,338 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-12-02 12:49:39,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2078 conditions, 1046 events. 533/1046 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 5036 event pairs, 82 based on Foata normal form. 0/946 useless extension candidates. Maximal degree in co-relation 1984. Up to 364 conditions per place. [2024-12-02 12:49:39,342 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 76 selfloop transitions, 15 changer transitions 0/107 dead transitions. [2024-12-02 12:49:39,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 107 transitions, 489 flow [2024-12-02 12:49:39,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 12:49:39,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-12-02 12:49:39,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 401 transitions. [2024-12-02 12:49:39,345 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6075757575757575 [2024-12-02 12:49:39,345 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 190 flow. Second operand 10 states and 401 transitions. [2024-12-02 12:49:39,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 107 transitions, 489 flow [2024-12-02 12:49:39,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 107 transitions, 486 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 12:49:39,347 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 237 flow [2024-12-02 12:49:39,347 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=237, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2024-12-02 12:49:39,347 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 5 predicate places. [2024-12-02 12:49:39,348 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 237 flow [2024-12-02 12:49:39,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 32.88) internal successors, (822), 25 states have internal predecessors, (822), 0 states have call successors, (0), 0 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 12:49:39,348 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:39,348 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:39,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-12-02 12:49:39,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:49:39,549 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:49:39,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:39,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1474965928, now seen corresponding path program 1 times [2024-12-02 12:49:39,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:39,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700345667] [2024-12-02 12:49:39,550 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:39,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:39,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:49:39,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:39,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700345667] [2024-12-02 12:49:39,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700345667] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:49:39,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889478676] [2024-12-02 12:49:39,869 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:39,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:49:39,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:49:39,871 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:49:39,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 12:49:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:39,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 12:49:39,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:49:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:49:40,129 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:49:40,198 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 12:49:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:49:40,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889478676] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:49:40,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:49:40,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-12-02 12:49:40,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331392980] [2024-12-02 12:49:40,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:49:40,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-12-02 12:49:40,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:40,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-12-02 12:49:40,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-12-02 12:49:40,666 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-12-02 12:49:40,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 237 flow. Second operand has 25 states, 25 states have (on average 32.12) internal successors, (803), 25 states have internal predecessors, (803), 0 states have call successors, (0), 0 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 12:49:40,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:40,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-12-02 12:49:40,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:41,071 INFO L124 PetriNetUnfolderBase]: 1255/2490 cut-off events. [2024-12-02 12:49:41,071 INFO L125 PetriNetUnfolderBase]: For 935/935 co-relation queries the response was YES. [2024-12-02 12:49:41,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5088 conditions, 2490 events. 1255/2490 cut-off events. For 935/935 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 14326 event pairs, 245 based on Foata normal form. 0/2279 useless extension candidates. Maximal degree in co-relation 4981. Up to 760 conditions per place. [2024-12-02 12:49:41,080 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 77 selfloop transitions, 15 changer transitions 0/107 dead transitions. [2024-12-02 12:49:41,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 107 transitions, 573 flow [2024-12-02 12:49:41,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 12:49:41,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-12-02 12:49:41,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 389 transitions. [2024-12-02 12:49:41,082 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5893939393939394 [2024-12-02 12:49:41,082 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 237 flow. Second operand 10 states and 389 transitions. [2024-12-02 12:49:41,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 107 transitions, 573 flow [2024-12-02 12:49:41,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 107 transitions, 552 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-02 12:49:41,085 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 263 flow [2024-12-02 12:49:41,085 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=263, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-12-02 12:49:41,086 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 10 predicate places. [2024-12-02 12:49:41,086 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 263 flow [2024-12-02 12:49:41,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 32.12) internal successors, (803), 25 states have internal predecessors, (803), 0 states have call successors, (0), 0 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 12:49:41,087 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:41,087 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:41,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-12-02 12:49:41,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:49:41,287 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:49:41,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:41,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1520697005, now seen corresponding path program 1 times [2024-12-02 12:49:41,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:41,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374246544] [2024-12-02 12:49:41,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:41,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:49:41,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:41,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374246544] [2024-12-02 12:49:41,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374246544] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:49:41,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113902040] [2024-12-02 12:49:41,696 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:41,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:49:41,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:49:41,698 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:49:41,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 12:49:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:41,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-12-02 12:49:41,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:49:41,820 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 12:49:41,824 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 12:49:41,911 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 12:49:41,912 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 12:49:41,921 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 12:49:42,244 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:49:42,244 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:49:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:49:42,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113902040] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 12:49:42,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 12:49:42,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2024-12-02 12:49:42,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583076955] [2024-12-02 12:49:42,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:42,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 12:49:42,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:42,601 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 12:49:42,601 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-12-02 12:49:42,899 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-12-02 12:49:42,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 263 flow. Second operand has 10 states, 10 states have (on average 33.0) internal successors, (330), 10 states have internal predecessors, (330), 0 states have call successors, (0), 0 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 12:49:42,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:42,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-12-02 12:49:42,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:43,266 INFO L124 PetriNetUnfolderBase]: 1209/2412 cut-off events. [2024-12-02 12:49:43,266 INFO L125 PetriNetUnfolderBase]: For 1140/1140 co-relation queries the response was YES. [2024-12-02 12:49:43,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5324 conditions, 2412 events. 1209/2412 cut-off events. For 1140/1140 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 14045 event pairs, 395 based on Foata normal form. 0/2333 useless extension candidates. Maximal degree in co-relation 5213. Up to 1136 conditions per place. [2024-12-02 12:49:43,280 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 55 selfloop transitions, 7 changer transitions 0/78 dead transitions. [2024-12-02 12:49:43,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 78 transitions, 440 flow [2024-12-02 12:49:43,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 12:49:43,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 12:49:43,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 235 transitions. [2024-12-02 12:49:43,282 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5934343434343434 [2024-12-02 12:49:43,282 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 263 flow. Second operand 6 states and 235 transitions. [2024-12-02 12:49:43,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 78 transitions, 440 flow [2024-12-02 12:49:43,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 78 transitions, 419 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-02 12:49:43,286 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 269 flow [2024-12-02 12:49:43,286 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=269, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-12-02 12:49:43,287 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 10 predicate places. [2024-12-02 12:49:43,287 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 269 flow [2024-12-02 12:49:43,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 33.0) internal successors, (330), 10 states have internal predecessors, (330), 0 states have call successors, (0), 0 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 12:49:43,287 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:43,287 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:43,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 12:49:43,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:49:43,488 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:49:43,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:43,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1292634881, now seen corresponding path program 1 times [2024-12-02 12:49:43,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:43,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738436264] [2024-12-02 12:49:43,489 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:43,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:43,547 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 12:49:43,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:43,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738436264] [2024-12-02 12:49:43,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738436264] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:43,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:49:43,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 12:49:43,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692574302] [2024-12-02 12:49:43,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:43,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:49:43,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:43,548 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:49:43,548 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:49:43,548 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 66 [2024-12-02 12:49:43,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 269 flow. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:43,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:43,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 66 [2024-12-02 12:49:43,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:43,954 INFO L124 PetriNetUnfolderBase]: 1524/3121 cut-off events. [2024-12-02 12:49:43,955 INFO L125 PetriNetUnfolderBase]: For 2580/2580 co-relation queries the response was YES. [2024-12-02 12:49:43,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7212 conditions, 3121 events. 1524/3121 cut-off events. For 2580/2580 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 19741 event pairs, 795 based on Foata normal form. 68/3119 useless extension candidates. Maximal degree in co-relation 7106. Up to 1657 conditions per place. [2024-12-02 12:49:43,975 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 72 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2024-12-02 12:49:43,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 93 transitions, 529 flow [2024-12-02 12:49:43,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:49:43,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 12:49:43,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2024-12-02 12:49:43,976 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7386363636363636 [2024-12-02 12:49:43,976 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 269 flow. Second operand 4 states and 195 transitions. [2024-12-02 12:49:43,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 93 transitions, 529 flow [2024-12-02 12:49:43,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 93 transitions, 514 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-02 12:49:43,982 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 275 flow [2024-12-02 12:49:43,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=275, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2024-12-02 12:49:43,983 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 11 predicate places. [2024-12-02 12:49:43,983 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 275 flow [2024-12-02 12:49:43,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:43,983 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:43,984 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:43,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-12-02 12:49:43,984 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:49:43,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:43,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1950438620, now seen corresponding path program 1 times [2024-12-02 12:49:43,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:43,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755913892] [2024-12-02 12:49:43,985 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:43,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:49:44,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:44,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755913892] [2024-12-02 12:49:44,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755913892] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:49:44,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553315750] [2024-12-02 12:49:44,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:44,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:49:44,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:49:44,376 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:49:44,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 12:49:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:44,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-12-02 12:49:44,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:49:44,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 12:49:44,497 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 12:49:44,565 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 12:49:44,565 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 12:49:44,573 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 12:49:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:49:44,964 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:49:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:49:45,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553315750] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:49:45,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:49:45,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2024-12-02 12:49:45,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856875554] [2024-12-02 12:49:45,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:49:45,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 12:49:45,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:45,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 12:49:45,333 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2024-12-02 12:49:46,527 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-12-02 12:49:46,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 275 flow. Second operand has 28 states, 28 states have (on average 28.464285714285715) internal successors, (797), 28 states have internal predecessors, (797), 0 states have call successors, (0), 0 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 12:49:46,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:46,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-12-02 12:49:46,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:47,667 INFO L124 PetriNetUnfolderBase]: 3253/6198 cut-off events. [2024-12-02 12:49:47,667 INFO L125 PetriNetUnfolderBase]: For 4970/4970 co-relation queries the response was YES. [2024-12-02 12:49:47,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15134 conditions, 6198 events. 3253/6198 cut-off events. For 4970/4970 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 38432 event pairs, 338 based on Foata normal form. 102/6249 useless extension candidates. Maximal degree in co-relation 15028. Up to 1304 conditions per place. [2024-12-02 12:49:47,692 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 131 selfloop transitions, 17 changer transitions 0/163 dead transitions. [2024-12-02 12:49:47,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 163 transitions, 935 flow [2024-12-02 12:49:47,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 12:49:47,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-12-02 12:49:47,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 580 transitions. [2024-12-02 12:49:47,695 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5169340463458111 [2024-12-02 12:49:47,695 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 275 flow. Second operand 17 states and 580 transitions. [2024-12-02 12:49:47,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 163 transitions, 935 flow [2024-12-02 12:49:47,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 163 transitions, 931 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 12:49:47,708 INFO L231 Difference]: Finished difference. Result has 92 places, 67 transitions, 354 flow [2024-12-02 12:49:47,709 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=354, PETRI_PLACES=92, PETRI_TRANSITIONS=67} [2024-12-02 12:49:47,709 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 30 predicate places. [2024-12-02 12:49:47,709 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 67 transitions, 354 flow [2024-12-02 12:49:47,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 28.464285714285715) internal successors, (797), 28 states have internal predecessors, (797), 0 states have call successors, (0), 0 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 12:49:47,710 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:47,710 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:47,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 12:49:47,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-12-02 12:49:47,910 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:49:47,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:47,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1504658210, now seen corresponding path program 1 times [2024-12-02 12:49:47,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:47,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537662750] [2024-12-02 12:49:47,911 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:47,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 12:49:47,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:47,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537662750] [2024-12-02 12:49:47,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537662750] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:47,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:49:47,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 12:49:47,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762678380] [2024-12-02 12:49:47,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:47,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:49:47,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:47,969 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:49:47,969 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:49:47,969 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 66 [2024-12-02 12:49:47,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 67 transitions, 354 flow. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:49:47,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:47,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 66 [2024-12-02 12:49:47,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:48,740 INFO L124 PetriNetUnfolderBase]: 3890/7835 cut-off events. [2024-12-02 12:49:48,740 INFO L125 PetriNetUnfolderBase]: For 8896/8896 co-relation queries the response was YES. [2024-12-02 12:49:48,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19210 conditions, 7835 events. 3890/7835 cut-off events. For 8896/8896 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 57468 event pairs, 2355 based on Foata normal form. 208/7949 useless extension candidates. Maximal degree in co-relation 19089. Up to 4430 conditions per place. [2024-12-02 12:49:48,815 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 78 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2024-12-02 12:49:48,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 100 transitions, 721 flow [2024-12-02 12:49:48,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:49:48,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 12:49:48,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 192 transitions. [2024-12-02 12:49:48,816 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7272727272727273 [2024-12-02 12:49:48,817 INFO L175 Difference]: Start difference. First operand has 92 places, 67 transitions, 354 flow. Second operand 4 states and 192 transitions. [2024-12-02 12:49:48,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 100 transitions, 721 flow [2024-12-02 12:49:48,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 100 transitions, 698 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-02 12:49:48,830 INFO L231 Difference]: Finished difference. Result has 91 places, 68 transitions, 350 flow [2024-12-02 12:49:48,831 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=350, PETRI_PLACES=91, PETRI_TRANSITIONS=68} [2024-12-02 12:49:48,831 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 29 predicate places. [2024-12-02 12:49:48,831 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 68 transitions, 350 flow [2024-12-02 12:49:48,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:49:48,831 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:48,831 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:48,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-12-02 12:49:48,832 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:49:48,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:48,832 INFO L85 PathProgramCache]: Analyzing trace with hash 901939731, now seen corresponding path program 1 times [2024-12-02 12:49:48,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:48,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043836633] [2024-12-02 12:49:48,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:48,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:48,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 12:49:48,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:48,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043836633] [2024-12-02 12:49:48,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043836633] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:48,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:49:48,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 12:49:48,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287154129] [2024-12-02 12:49:48,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:48,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:49:48,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:48,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:49:48,914 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:49:48,931 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-12-02 12:49:48,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 68 transitions, 350 flow. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 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 12:49:48,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:48,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-12-02 12:49:48,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:49,793 INFO L124 PetriNetUnfolderBase]: 4407/8894 cut-off events. [2024-12-02 12:49:49,793 INFO L125 PetriNetUnfolderBase]: For 10496/10496 co-relation queries the response was YES. [2024-12-02 12:49:49,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22869 conditions, 8894 events. 4407/8894 cut-off events. For 10496/10496 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 65495 event pairs, 3169 based on Foata normal form. 5/8548 useless extension candidates. Maximal degree in co-relation 22754. Up to 5793 conditions per place. [2024-12-02 12:49:49,833 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 82 selfloop transitions, 5 changer transitions 2/108 dead transitions. [2024-12-02 12:49:49,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 108 transitions, 683 flow [2024-12-02 12:49:49,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 12:49:49,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 12:49:49,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 233 transitions. [2024-12-02 12:49:49,834 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.706060606060606 [2024-12-02 12:49:49,834 INFO L175 Difference]: Start difference. First operand has 91 places, 68 transitions, 350 flow. Second operand 5 states and 233 transitions. [2024-12-02 12:49:49,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 108 transitions, 683 flow [2024-12-02 12:49:49,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 108 transitions, 680 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 12:49:49,862 INFO L231 Difference]: Finished difference. Result has 96 places, 69 transitions, 369 flow [2024-12-02 12:49:49,862 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=369, PETRI_PLACES=96, PETRI_TRANSITIONS=69} [2024-12-02 12:49:49,863 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 34 predicate places. [2024-12-02 12:49:49,863 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 69 transitions, 369 flow [2024-12-02 12:49:49,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 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 12:49:49,863 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:49,863 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:49,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-12-02 12:49:49,863 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:49:49,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:49,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1198821169, now seen corresponding path program 2 times [2024-12-02 12:49:49,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:49,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458214871] [2024-12-02 12:49:49,864 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:49:49,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:49,876 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 12:49:49,876 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:49:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 12:49:49,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:49,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458214871] [2024-12-02 12:49:49,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458214871] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:49,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:49:49,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:49:49,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322056368] [2024-12-02 12:49:49,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:49,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:49:49,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:49,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:49:49,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:49:49,913 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 66 [2024-12-02 12:49:49,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 69 transitions, 369 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 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 12:49:49,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:49,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 66 [2024-12-02 12:49:49,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:50,728 INFO L124 PetriNetUnfolderBase]: 4157/8213 cut-off events. [2024-12-02 12:49:50,728 INFO L125 PetriNetUnfolderBase]: For 12021/12021 co-relation queries the response was YES. [2024-12-02 12:49:50,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21957 conditions, 8213 events. 4157/8213 cut-off events. For 12021/12021 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 60367 event pairs, 1915 based on Foata normal form. 15/8053 useless extension candidates. Maximal degree in co-relation 21838. Up to 3921 conditions per place. [2024-12-02 12:49:50,753 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 73 selfloop transitions, 3 changer transitions 1/97 dead transitions. [2024-12-02 12:49:50,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 97 transitions, 696 flow [2024-12-02 12:49:50,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:49:50,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:49:50,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 154 transitions. [2024-12-02 12:49:50,755 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2024-12-02 12:49:50,755 INFO L175 Difference]: Start difference. First operand has 96 places, 69 transitions, 369 flow. Second operand 3 states and 154 transitions. [2024-12-02 12:49:50,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 97 transitions, 696 flow [2024-12-02 12:49:50,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 97 transitions, 684 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 12:49:50,766 INFO L231 Difference]: Finished difference. Result has 96 places, 71 transitions, 380 flow [2024-12-02 12:49:50,766 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=380, PETRI_PLACES=96, PETRI_TRANSITIONS=71} [2024-12-02 12:49:50,767 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 34 predicate places. [2024-12-02 12:49:50,767 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 71 transitions, 380 flow [2024-12-02 12:49:50,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 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 12:49:50,767 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:50,767 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:50,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-12-02 12:49:50,767 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:49:50,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:50,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1581604931, now seen corresponding path program 1 times [2024-12-02 12:49:50,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:50,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422097477] [2024-12-02 12:49:50,768 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:50,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:51,106 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:49:51,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:51,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422097477] [2024-12-02 12:49:51,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422097477] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:49:51,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240070807] [2024-12-02 12:49:51,106 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:51,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:49:51,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:49:51,108 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:49:51,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 12:49:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:51,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-12-02 12:49:51,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:49:51,237 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 12:49:51,240 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 12:49:51,325 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-02 12:49:51,325 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 12:49:51,343 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 12:49:51,344 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 12:49:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:49:51,761 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:49:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:49:52,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240070807] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:49:52,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:49:52,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2024-12-02 12:49:52,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289368837] [2024-12-02 12:49:52,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:49:52,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 12:49:52,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:52,178 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 12:49:52,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2024-12-02 12:49:53,362 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 66 [2024-12-02 12:49:53,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 71 transitions, 380 flow. Second operand has 28 states, 28 states have (on average 29.571428571428573) internal successors, (828), 28 states have internal predecessors, (828), 0 states have call successors, (0), 0 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 12:49:53,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:53,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 66 [2024-12-02 12:49:53,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:55,566 INFO L124 PetriNetUnfolderBase]: 8299/16879 cut-off events. [2024-12-02 12:49:55,567 INFO L125 PetriNetUnfolderBase]: For 21419/21419 co-relation queries the response was YES. [2024-12-02 12:49:55,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47000 conditions, 16879 events. 8299/16879 cut-off events. For 21419/21419 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 134146 event pairs, 1319 based on Foata normal form. 327/17084 useless extension candidates. Maximal degree in co-relation 46881. Up to 3350 conditions per place. [2024-12-02 12:49:55,622 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 147 selfloop transitions, 17 changer transitions 0/181 dead transitions. [2024-12-02 12:49:55,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 181 transitions, 1344 flow [2024-12-02 12:49:55,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 12:49:55,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-12-02 12:49:55,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 585 transitions. [2024-12-02 12:49:55,624 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5213903743315508 [2024-12-02 12:49:55,625 INFO L175 Difference]: Start difference. First operand has 96 places, 71 transitions, 380 flow. Second operand 17 states and 585 transitions. [2024-12-02 12:49:55,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 181 transitions, 1344 flow [2024-12-02 12:49:55,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 181 transitions, 1334 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 12:49:55,650 INFO L231 Difference]: Finished difference. Result has 115 places, 74 transitions, 457 flow [2024-12-02 12:49:55,650 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=457, PETRI_PLACES=115, PETRI_TRANSITIONS=74} [2024-12-02 12:49:55,650 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 53 predicate places. [2024-12-02 12:49:55,650 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 74 transitions, 457 flow [2024-12-02 12:49:55,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 29.571428571428573) internal successors, (828), 28 states have internal predecessors, (828), 0 states have call successors, (0), 0 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 12:49:55,651 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:55,651 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 12:49:55,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 12:49:55,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-12-02 12:49:55,851 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:49:55,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:55,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1686037115, now seen corresponding path program 1 times [2024-12-02 12:49:55,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:55,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072797367] [2024-12-02 12:49:55,852 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:55,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:55,923 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 12:49:55,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:55,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072797367] [2024-12-02 12:49:55,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072797367] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:55,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:49:55,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 12:49:55,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19208808] [2024-12-02 12:49:55,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:55,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:49:55,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:55,925 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:49:55,925 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:49:55,943 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-12-02 12:49:55,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 74 transitions, 457 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:55,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:55,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-12-02 12:49:55,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:57,787 INFO L124 PetriNetUnfolderBase]: 9934/20468 cut-off events. [2024-12-02 12:49:57,787 INFO L125 PetriNetUnfolderBase]: For 32440/32440 co-relation queries the response was YES. [2024-12-02 12:49:57,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57409 conditions, 20468 events. 9934/20468 cut-off events. For 32440/32440 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 172987 event pairs, 4889 based on Foata normal form. 0/19765 useless extension candidates. Maximal degree in co-relation 57275. Up to 14316 conditions per place. [2024-12-02 12:49:57,872 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 84 selfloop transitions, 4 changer transitions 0/108 dead transitions. [2024-12-02 12:49:57,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 821 flow [2024-12-02 12:49:57,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:49:57,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 12:49:57,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 190 transitions. [2024-12-02 12:49:57,874 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7196969696969697 [2024-12-02 12:49:57,874 INFO L175 Difference]: Start difference. First operand has 115 places, 74 transitions, 457 flow. Second operand 4 states and 190 transitions. [2024-12-02 12:49:57,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 821 flow [2024-12-02 12:49:57,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 108 transitions, 796 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-12-02 12:49:57,929 INFO L231 Difference]: Finished difference. Result has 109 places, 78 transitions, 500 flow [2024-12-02 12:49:57,929 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=500, PETRI_PLACES=109, PETRI_TRANSITIONS=78} [2024-12-02 12:49:57,929 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 47 predicate places. [2024-12-02 12:49:57,930 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 78 transitions, 500 flow [2024-12-02 12:49:57,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:57,930 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:57,930 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 12:49:57,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-12-02 12:49:57,930 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:49:57,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:57,931 INFO L85 PathProgramCache]: Analyzing trace with hash -977779657, now seen corresponding path program 2 times [2024-12-02 12:49:57,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:57,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946210325] [2024-12-02 12:49:57,931 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:49:57,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:57,941 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 12:49:57,941 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:49:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 12:49:57,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:57,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946210325] [2024-12-02 12:49:57,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946210325] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:57,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:49:57,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 12:49:57,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560166777] [2024-12-02 12:49:57,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:57,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:49:57,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:57,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:49:57,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:49:57,986 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-12-02 12:49:57,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 78 transitions, 500 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:57,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:57,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-12-02 12:49:57,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:50:00,128 INFO L124 PetriNetUnfolderBase]: 9966/20512 cut-off events. [2024-12-02 12:50:00,129 INFO L125 PetriNetUnfolderBase]: For 35863/35863 co-relation queries the response was YES. [2024-12-02 12:50:00,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59195 conditions, 20512 events. 9966/20512 cut-off events. For 35863/35863 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 173045 event pairs, 6885 based on Foata normal form. 4/20346 useless extension candidates. Maximal degree in co-relation 59069. Up to 11333 conditions per place. [2024-12-02 12:50:00,212 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 94 selfloop transitions, 7 changer transitions 2/123 dead transitions. [2024-12-02 12:50:00,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 123 transitions, 982 flow [2024-12-02 12:50:00,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 12:50:00,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 12:50:00,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 229 transitions. [2024-12-02 12:50:00,213 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.693939393939394 [2024-12-02 12:50:00,213 INFO L175 Difference]: Start difference. First operand has 109 places, 78 transitions, 500 flow. Second operand 5 states and 229 transitions. [2024-12-02 12:50:00,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 123 transitions, 982 flow [2024-12-02 12:50:00,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 123 transitions, 982 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-12-02 12:50:00,272 INFO L231 Difference]: Finished difference. Result has 115 places, 79 transitions, 528 flow [2024-12-02 12:50:00,272 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=528, PETRI_PLACES=115, PETRI_TRANSITIONS=79} [2024-12-02 12:50:00,273 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 53 predicate places. [2024-12-02 12:50:00,273 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 79 transitions, 528 flow [2024-12-02 12:50:00,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:50:00,273 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:50:00,273 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 12:50:00,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-12-02 12:50:00,273 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:50:00,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:50:00,274 INFO L85 PathProgramCache]: Analyzing trace with hash 44018297, now seen corresponding path program 1 times [2024-12-02 12:50:00,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:50:00,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262198634] [2024-12-02 12:50:00,274 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:50:00,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:50:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:50:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 12:50:00,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:50:00,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262198634] [2024-12-02 12:50:00,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262198634] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:50:00,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:50:00,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 12:50:00,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130516291] [2024-12-02 12:50:00,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:50:00,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:50:00,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:50:00,327 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:50:00,327 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:50:00,346 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-12-02 12:50:00,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 79 transitions, 528 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:50:00,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:50:00,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-12-02 12:50:00,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:50:02,328 INFO L124 PetriNetUnfolderBase]: 9949/20454 cut-off events. [2024-12-02 12:50:02,328 INFO L125 PetriNetUnfolderBase]: For 41303/41303 co-relation queries the response was YES. [2024-12-02 12:50:02,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60109 conditions, 20454 events. 9949/20454 cut-off events. For 41303/41303 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 172624 event pairs, 7283 based on Foata normal form. 90/20371 useless extension candidates. Maximal degree in co-relation 59978. Up to 13137 conditions per place. [2024-12-02 12:50:02,432 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 103 selfloop transitions, 5 changer transitions 0/129 dead transitions. [2024-12-02 12:50:02,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 129 transitions, 1072 flow [2024-12-02 12:50:02,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:50:02,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 12:50:02,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 202 transitions. [2024-12-02 12:50:02,434 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7651515151515151 [2024-12-02 12:50:02,434 INFO L175 Difference]: Start difference. First operand has 115 places, 79 transitions, 528 flow. Second operand 4 states and 202 transitions. [2024-12-02 12:50:02,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 129 transitions, 1072 flow [2024-12-02 12:50:02,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 129 transitions, 1042 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-12-02 12:50:02,494 INFO L231 Difference]: Finished difference. Result has 117 places, 81 transitions, 555 flow [2024-12-02 12:50:02,494 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=555, PETRI_PLACES=117, PETRI_TRANSITIONS=81} [2024-12-02 12:50:02,495 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 55 predicate places. [2024-12-02 12:50:02,495 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 81 transitions, 555 flow [2024-12-02 12:50:02,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:50:02,495 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:50:02,495 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 12:50:02,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-12-02 12:50:02,495 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:50:02,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:50:02,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1870955025, now seen corresponding path program 3 times [2024-12-02 12:50:02,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:50:02,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591834299] [2024-12-02 12:50:02,496 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:50:02,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:50:02,506 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-12-02 12:50:02,506 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:50:02,527 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 12:50:02,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:50:02,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591834299] [2024-12-02 12:50:02,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591834299] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:50:02,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:50:02,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 12:50:02,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235501821] [2024-12-02 12:50:02,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:50:02,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:50:02,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:50:02,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:50:02,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:50:02,547 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-12-02 12:50:02,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 81 transitions, 555 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:50:02,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:50:02,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-12-02 12:50:02,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:50:04,950 INFO L124 PetriNetUnfolderBase]: 9856/20362 cut-off events. [2024-12-02 12:50:04,950 INFO L125 PetriNetUnfolderBase]: For 41436/41436 co-relation queries the response was YES. [2024-12-02 12:50:05,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59892 conditions, 20362 events. 9856/20362 cut-off events. For 41436/41436 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 171851 event pairs, 7017 based on Foata normal form. 107/20316 useless extension candidates. Maximal degree in co-relation 59761. Up to 11752 conditions per place. [2024-12-02 12:50:05,084 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 92 selfloop transitions, 8 changer transitions 2/123 dead transitions. [2024-12-02 12:50:05,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 123 transitions, 1038 flow [2024-12-02 12:50:05,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:50:05,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 12:50:05,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 196 transitions. [2024-12-02 12:50:05,085 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7424242424242424 [2024-12-02 12:50:05,086 INFO L175 Difference]: Start difference. First operand has 117 places, 81 transitions, 555 flow. Second operand 4 states and 196 transitions. [2024-12-02 12:50:05,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 123 transitions, 1038 flow [2024-12-02 12:50:05,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 123 transitions, 1029 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-12-02 12:50:05,188 INFO L231 Difference]: Finished difference. Result has 120 places, 82 transitions, 592 flow [2024-12-02 12:50:05,188 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=592, PETRI_PLACES=120, PETRI_TRANSITIONS=82} [2024-12-02 12:50:05,188 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 58 predicate places. [2024-12-02 12:50:05,189 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 82 transitions, 592 flow [2024-12-02 12:50:05,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:50:05,189 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:50:05,189 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 12:50:05,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-12-02 12:50:05,189 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:50:05,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:50:05,190 INFO L85 PathProgramCache]: Analyzing trace with hash -638621153, now seen corresponding path program 2 times [2024-12-02 12:50:05,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:50:05,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742507492] [2024-12-02 12:50:05,190 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:50:05,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:50:05,209 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 12:50:05,209 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:50:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 12:50:05,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:50:05,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742507492] [2024-12-02 12:50:05,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742507492] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:50:05,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:50:05,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 12:50:05,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626755681] [2024-12-02 12:50:05,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:50:05,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:50:05,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:50:05,247 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:50:05,247 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:50:05,263 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-12-02 12:50:05,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 82 transitions, 592 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:50:05,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:50:05,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-12-02 12:50:05,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:50:07,530 INFO L124 PetriNetUnfolderBase]: 10358/21460 cut-off events. [2024-12-02 12:50:07,531 INFO L125 PetriNetUnfolderBase]: For 46943/46943 co-relation queries the response was YES. [2024-12-02 12:50:07,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64291 conditions, 21460 events. 10358/21460 cut-off events. For 46943/46943 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 185683 event pairs, 6085 based on Foata normal form. 90/21389 useless extension candidates. Maximal degree in co-relation 64159. Up to 15168 conditions per place. [2024-12-02 12:50:07,642 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 81 selfloop transitions, 6 changer transitions 3/112 dead transitions. [2024-12-02 12:50:07,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 112 transitions, 937 flow [2024-12-02 12:50:07,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:50:07,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 12:50:07,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 191 transitions. [2024-12-02 12:50:07,644 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7234848484848485 [2024-12-02 12:50:07,644 INFO L175 Difference]: Start difference. First operand has 120 places, 82 transitions, 592 flow. Second operand 4 states and 191 transitions. [2024-12-02 12:50:07,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 112 transitions, 937 flow [2024-12-02 12:50:07,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 112 transitions, 921 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-12-02 12:50:07,696 INFO L231 Difference]: Finished difference. Result has 121 places, 83 transitions, 614 flow [2024-12-02 12:50:07,696 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=614, PETRI_PLACES=121, PETRI_TRANSITIONS=83} [2024-12-02 12:50:07,697 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 59 predicate places. [2024-12-02 12:50:07,697 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 83 transitions, 614 flow [2024-12-02 12:50:07,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:50:07,697 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:50:07,697 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-12-02 12:50:07,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-12-02 12:50:07,697 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:50:07,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:50:07,698 INFO L85 PathProgramCache]: Analyzing trace with hash -137445763, now seen corresponding path program 1 times [2024-12-02 12:50:07,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:50:07,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860534847] [2024-12-02 12:50:07,698 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:50:07,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:50:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:50:07,999 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:50:07,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:50:07,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860534847] [2024-12-02 12:50:08,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860534847] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:50:08,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142339017] [2024-12-02 12:50:08,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:50:08,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:50:08,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:50:08,001 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:50:08,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 12:50:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:50:08,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-12-02 12:50:08,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:50:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:50:08,362 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:50:08,500 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 12:50:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:50:08,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142339017] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:50:08,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:50:08,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-12-02 12:50:08,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149789252] [2024-12-02 12:50:08,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:50:08,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-12-02 12:50:08,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:50:08,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-12-02 12:50:08,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2024-12-02 12:50:10,215 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-12-02 12:50:10,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 83 transitions, 614 flow. Second operand has 32 states, 32 states have (on average 33.25) internal successors, (1064), 32 states have internal predecessors, (1064), 0 states have call successors, (0), 0 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 12:50:10,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:50:10,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-12-02 12:50:10,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:50:13,316 INFO L124 PetriNetUnfolderBase]: 12584/25476 cut-off events. [2024-12-02 12:50:13,317 INFO L125 PetriNetUnfolderBase]: For 55598/55599 co-relation queries the response was YES. [2024-12-02 12:50:13,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75888 conditions, 25476 events. 12584/25476 cut-off events. For 55598/55599 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 215765 event pairs, 2143 based on Foata normal form. 342/25671 useless extension candidates. Maximal degree in co-relation 75756. Up to 5091 conditions per place. [2024-12-02 12:50:13,465 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 185 selfloop transitions, 21 changer transitions 0/228 dead transitions. [2024-12-02 12:50:13,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 228 transitions, 1938 flow [2024-12-02 12:50:13,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 12:50:13,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-02 12:50:13,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 558 transitions. [2024-12-02 12:50:13,466 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6503496503496503 [2024-12-02 12:50:13,466 INFO L175 Difference]: Start difference. First operand has 121 places, 83 transitions, 614 flow. Second operand 13 states and 558 transitions. [2024-12-02 12:50:13,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 228 transitions, 1938 flow [2024-12-02 12:50:13,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 228 transitions, 1926 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-12-02 12:50:13,524 INFO L231 Difference]: Finished difference. Result has 133 places, 85 transitions, 686 flow [2024-12-02 12:50:13,524 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=686, PETRI_PLACES=133, PETRI_TRANSITIONS=85} [2024-12-02 12:50:13,524 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 71 predicate places. [2024-12-02 12:50:13,524 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 85 transitions, 686 flow [2024-12-02 12:50:13,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 33.25) internal successors, (1064), 32 states have internal predecessors, (1064), 0 states have call successors, (0), 0 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 12:50:13,524 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:50:13,524 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:50:13,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 12:50:13,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-12-02 12:50:13,725 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:50:13,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:50:13,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1905514552, now seen corresponding path program 1 times [2024-12-02 12:50:13,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:50:13,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583534568] [2024-12-02 12:50:13,725 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:50:13,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:50:13,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:50:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:50:13,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:50:13,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583534568] [2024-12-02 12:50:13,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583534568] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:50:13,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932350656] [2024-12-02 12:50:13,969 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:50:13,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:50:13,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:50:13,971 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:50:13,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 12:50:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:50:14,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-12-02 12:50:14,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:50:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:50:14,270 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:50:14,401 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 12:50:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 12:50:14,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932350656] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:50:14,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:50:14,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-12-02 12:50:14,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820607493] [2024-12-02 12:50:14,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:50:14,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-12-02 12:50:14,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:50:14,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-12-02 12:50:14,495 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2024-12-02 12:50:15,624 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-12-02 12:50:15,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 85 transitions, 686 flow. Second operand has 32 states, 32 states have (on average 32.625) internal successors, (1044), 32 states have internal predecessors, (1044), 0 states have call successors, (0), 0 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 12:50:15,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:50:15,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-12-02 12:50:15,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:50:20,154 INFO L124 PetriNetUnfolderBase]: 16367/31924 cut-off events. [2024-12-02 12:50:20,154 INFO L125 PetriNetUnfolderBase]: For 79953/79954 co-relation queries the response was YES. [2024-12-02 12:50:20,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96849 conditions, 31924 events. 16367/31924 cut-off events. For 79953/79954 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 267482 event pairs, 2150 based on Foata normal form. 453/32293 useless extension candidates. Maximal degree in co-relation 96703. Up to 6869 conditions per place. [2024-12-02 12:50:20,336 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 186 selfloop transitions, 21 changer transitions 0/229 dead transitions. [2024-12-02 12:50:20,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 229 transitions, 2170 flow [2024-12-02 12:50:20,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 12:50:20,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-02 12:50:20,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 540 transitions. [2024-12-02 12:50:20,337 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6293706293706294 [2024-12-02 12:50:20,337 INFO L175 Difference]: Start difference. First operand has 133 places, 85 transitions, 686 flow. Second operand 13 states and 540 transitions. [2024-12-02 12:50:20,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 229 transitions, 2170 flow [2024-12-02 12:50:20,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 229 transitions, 2099 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-12-02 12:50:20,610 INFO L231 Difference]: Finished difference. Result has 140 places, 87 transitions, 739 flow [2024-12-02 12:50:20,610 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=739, PETRI_PLACES=140, PETRI_TRANSITIONS=87} [2024-12-02 12:50:20,610 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 78 predicate places. [2024-12-02 12:50:20,611 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 87 transitions, 739 flow [2024-12-02 12:50:20,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 32.625) internal successors, (1044), 32 states have internal predecessors, (1044), 0 states have call successors, (0), 0 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 12:50:20,611 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:50:20,611 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 12:50:20,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 12:50:20,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-12-02 12:50:20,812 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:50:20,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:50:20,812 INFO L85 PathProgramCache]: Analyzing trace with hash -641895071, now seen corresponding path program 1 times [2024-12-02 12:50:20,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:50:20,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36853428] [2024-12-02 12:50:20,812 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:50:20,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:50:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:50:21,210 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 12:50:21,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:50:21,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36853428] [2024-12-02 12:50:21,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36853428] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:50:21,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:50:21,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-12-02 12:50:21,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463827509] [2024-12-02 12:50:21,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:50:21,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 12:50:21,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:50:21,211 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 12:50:21,211 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-12-02 12:50:21,604 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-12-02 12:50:21,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 87 transitions, 739 flow. Second operand has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 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 12:50:21,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:50:21,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-12-02 12:50:21,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:50:26,161 INFO L124 PetriNetUnfolderBase]: 19348/37419 cut-off events. [2024-12-02 12:50:26,161 INFO L125 PetriNetUnfolderBase]: For 108771/108994 co-relation queries the response was YES. [2024-12-02 12:50:26,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118032 conditions, 37419 events. 19348/37419 cut-off events. For 108771/108994 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 311116 event pairs, 14248 based on Foata normal form. 9/37397 useless extension candidates. Maximal degree in co-relation 117881. Up to 25124 conditions per place. [2024-12-02 12:50:26,409 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 217 selfloop transitions, 25 changer transitions 0/257 dead transitions. [2024-12-02 12:50:26,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 257 transitions, 2493 flow [2024-12-02 12:50:26,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 12:50:26,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-12-02 12:50:26,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 602 transitions. [2024-12-02 12:50:26,411 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6080808080808081 [2024-12-02 12:50:26,411 INFO L175 Difference]: Start difference. First operand has 140 places, 87 transitions, 739 flow. Second operand 15 states and 602 transitions. [2024-12-02 12:50:26,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 257 transitions, 2493 flow [2024-12-02 12:50:26,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 257 transitions, 2418 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-12-02 12:50:26,575 INFO L231 Difference]: Finished difference. Result has 155 places, 104 transitions, 962 flow [2024-12-02 12:50:26,575 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=962, PETRI_PLACES=155, PETRI_TRANSITIONS=104} [2024-12-02 12:50:26,576 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 93 predicate places. [2024-12-02 12:50:26,576 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 104 transitions, 962 flow [2024-12-02 12:50:26,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 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 12:50:26,576 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:50:26,576 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 12:50:26,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-12-02 12:50:26,576 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:50:26,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:50:26,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1166447049, now seen corresponding path program 2 times [2024-12-02 12:50:26,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:50:26,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435926743] [2024-12-02 12:50:26,577 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:50:26,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:50:26,596 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 12:50:26,597 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:50:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 12:50:26,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:50:26,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435926743] [2024-12-02 12:50:26,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435926743] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:50:26,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:50:26,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-12-02 12:50:26,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962381814] [2024-12-02 12:50:26,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:50:26,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 12:50:26,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:50:26,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 12:50:26,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-12-02 12:50:27,186 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-12-02 12:50:27,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 104 transitions, 962 flow. Second operand has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 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 12:50:27,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:50:27,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-12-02 12:50:27,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:50:32,280 INFO L124 PetriNetUnfolderBase]: 19378/37471 cut-off events. [2024-12-02 12:50:32,280 INFO L125 PetriNetUnfolderBase]: For 134856/134950 co-relation queries the response was YES. [2024-12-02 12:50:32,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129359 conditions, 37471 events. 19378/37471 cut-off events. For 134856/134950 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 309386 event pairs, 15801 based on Foata normal form. 8/37443 useless extension candidates. Maximal degree in co-relation 129206. Up to 25124 conditions per place. [2024-12-02 12:50:32,554 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 171 selfloop transitions, 38 changer transitions 0/224 dead transitions. [2024-12-02 12:50:32,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 224 transitions, 2135 flow [2024-12-02 12:50:32,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 12:50:32,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-12-02 12:50:32,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 561 transitions. [2024-12-02 12:50:32,556 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-12-02 12:50:32,556 INFO L175 Difference]: Start difference. First operand has 155 places, 104 transitions, 962 flow. Second operand 14 states and 561 transitions. [2024-12-02 12:50:32,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 224 transitions, 2135 flow [2024-12-02 12:50:32,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 224 transitions, 2037 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-12-02 12:50:32,923 INFO L231 Difference]: Finished difference. Result has 175 places, 125 transitions, 1297 flow [2024-12-02 12:50:32,924 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1297, PETRI_PLACES=175, PETRI_TRANSITIONS=125} [2024-12-02 12:50:32,924 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 113 predicate places. [2024-12-02 12:50:32,924 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 125 transitions, 1297 flow [2024-12-02 12:50:32,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 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 12:50:32,924 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:50:32,925 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 12:50:32,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-12-02 12:50:32,925 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:50:32,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:50:32,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1848440935, now seen corresponding path program 3 times [2024-12-02 12:50:32,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:50:32,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019390294] [2024-12-02 12:50:32,926 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:50:32,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:50:32,941 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-12-02 12:50:32,941 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:50:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 12:50:33,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:50:33,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019390294] [2024-12-02 12:50:33,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019390294] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:50:33,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:50:33,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-12-02 12:50:33,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64087907] [2024-12-02 12:50:33,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:50:33,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 12:50:33,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:50:33,152 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 12:50:33,152 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-12-02 12:50:33,545 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-12-02 12:50:33,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 125 transitions, 1297 flow. Second operand has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 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 12:50:33,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:50:33,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-12-02 12:50:33,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:50:39,688 INFO L124 PetriNetUnfolderBase]: 19689/38288 cut-off events. [2024-12-02 12:50:39,688 INFO L125 PetriNetUnfolderBase]: For 152156/152379 co-relation queries the response was YES. [2024-12-02 12:50:39,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137011 conditions, 38288 events. 19689/38288 cut-off events. For 152156/152379 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 320112 event pairs, 14361 based on Foata normal form. 9/38266 useless extension candidates. Maximal degree in co-relation 136848. Up to 25307 conditions per place. [2024-12-02 12:50:39,972 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 211 selfloop transitions, 42 changer transitions 0/268 dead transitions. [2024-12-02 12:50:39,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 268 transitions, 3051 flow [2024-12-02 12:50:39,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 12:50:39,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-12-02 12:50:39,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 560 transitions. [2024-12-02 12:50:39,974 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-12-02 12:50:39,974 INFO L175 Difference]: Start difference. First operand has 175 places, 125 transitions, 1297 flow. Second operand 14 states and 560 transitions. [2024-12-02 12:50:39,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 268 transitions, 3051 flow [2024-12-02 12:50:40,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 268 transitions, 2914 flow, removed 67 selfloop flow, removed 2 redundant places. [2024-12-02 12:50:40,368 INFO L231 Difference]: Finished difference. Result has 194 places, 140 transitions, 1620 flow [2024-12-02 12:50:40,368 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1620, PETRI_PLACES=194, PETRI_TRANSITIONS=140} [2024-12-02 12:50:40,368 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 132 predicate places. [2024-12-02 12:50:40,368 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 140 transitions, 1620 flow [2024-12-02 12:50:40,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 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 12:50:40,368 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:50:40,368 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 12:50:40,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-12-02 12:50:40,369 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:50:40,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:50:40,369 INFO L85 PathProgramCache]: Analyzing trace with hash 561576859, now seen corresponding path program 4 times [2024-12-02 12:50:40,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:50:40,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584958965] [2024-12-02 12:50:40,369 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:50:40,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:50:40,385 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:50:40,385 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:50:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 12:50:40,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:50:40,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584958965] [2024-12-02 12:50:40,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584958965] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:50:40,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:50:40,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-12-02 12:50:40,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139790061] [2024-12-02 12:50:40,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:50:40,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 12:50:40,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:50:40,535 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 12:50:40,535 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-12-02 12:50:40,811 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-12-02 12:50:40,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 140 transitions, 1620 flow. Second operand has 9 states, 9 states have (on average 33.111111111111114) internal successors, (298), 9 states have internal predecessors, (298), 0 states have call successors, (0), 0 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 12:50:40,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:50:40,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-12-02 12:50:40,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:50:46,952 INFO L124 PetriNetUnfolderBase]: 19745/38147 cut-off events. [2024-12-02 12:50:46,952 INFO L125 PetriNetUnfolderBase]: For 153783/153878 co-relation queries the response was YES. [2024-12-02 12:50:47,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134456 conditions, 38147 events. 19745/38147 cut-off events. For 153783/153878 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 315273 event pairs, 15926 based on Foata normal form. 9/38109 useless extension candidates. Maximal degree in co-relation 134284. Up to 25151 conditions per place. [2024-12-02 12:50:47,285 INFO L140 encePairwiseOnDemand]: 54/66 looper letters, 170 selfloop transitions, 55 changer transitions 0/240 dead transitions. [2024-12-02 12:50:47,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 240 transitions, 2831 flow [2024-12-02 12:50:47,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 12:50:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 12:50:47,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 458 transitions. [2024-12-02 12:50:47,286 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6308539944903582 [2024-12-02 12:50:47,286 INFO L175 Difference]: Start difference. First operand has 194 places, 140 transitions, 1620 flow. Second operand 11 states and 458 transitions. [2024-12-02 12:50:47,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 240 transitions, 2831 flow [2024-12-02 12:50:47,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 240 transitions, 2722 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-12-02 12:50:47,632 INFO L231 Difference]: Finished difference. Result has 206 places, 158 transitions, 1934 flow [2024-12-02 12:50:47,633 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1534, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1934, PETRI_PLACES=206, PETRI_TRANSITIONS=158} [2024-12-02 12:50:47,633 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 144 predicate places. [2024-12-02 12:50:47,633 INFO L471 AbstractCegarLoop]: Abstraction has has 206 places, 158 transitions, 1934 flow [2024-12-02 12:50:47,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 33.111111111111114) internal successors, (298), 9 states have internal predecessors, (298), 0 states have call successors, (0), 0 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 12:50:47,633 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:50:47,633 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 12:50:47,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-12-02 12:50:47,633 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:50:47,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:50:47,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1469388425, now seen corresponding path program 5 times [2024-12-02 12:50:47,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:50:47,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236785151] [2024-12-02 12:50:47,635 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:50:47,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:50:47,656 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-12-02 12:50:47,657 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:50:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-12-02 12:50:48,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:50:48,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236785151] [2024-12-02 12:50:48,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236785151] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:50:48,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762569658] [2024-12-02 12:50:48,241 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:50:48,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:50:48,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:50:48,243 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:50:48,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 12:50:48,434 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-12-02 12:50:48,434 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:50:48,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 12:50:48,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:50:48,558 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 12:50:48,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2024-12-02 12:50:48,604 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 12:50:48,604 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:50:48,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762569658] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:50:48,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 12:50:48,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 20 [2024-12-02 12:50:48,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903258802] [2024-12-02 12:50:48,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:50:48,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 12:50:48,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:50:48,605 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 12:50:48,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2024-12-02 12:50:48,887 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-12-02 12:50:48,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 158 transitions, 1934 flow. Second operand has 9 states, 9 states have (on average 33.111111111111114) internal successors, (298), 9 states have internal predecessors, (298), 0 states have call successors, (0), 0 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 12:50:48,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:50:48,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-12-02 12:50:48,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:50:55,564 INFO L124 PetriNetUnfolderBase]: 19737/38404 cut-off events. [2024-12-02 12:50:55,564 INFO L125 PetriNetUnfolderBase]: For 152687/152843 co-relation queries the response was YES. [2024-12-02 12:50:55,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135652 conditions, 38404 events. 19737/38404 cut-off events. For 152687/152843 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 320019 event pairs, 15039 based on Foata normal form. 8/38366 useless extension candidates. Maximal degree in co-relation 135475. Up to 25151 conditions per place. [2024-12-02 12:50:55,919 INFO L140 encePairwiseOnDemand]: 54/66 looper letters, 200 selfloop transitions, 56 changer transitions 0/271 dead transitions. [2024-12-02 12:50:55,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 271 transitions, 3477 flow [2024-12-02 12:50:55,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 12:50:55,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-12-02 12:50:55,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 415 transitions. [2024-12-02 12:50:55,920 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6287878787878788 [2024-12-02 12:50:55,920 INFO L175 Difference]: Start difference. First operand has 206 places, 158 transitions, 1934 flow. Second operand 10 states and 415 transitions. [2024-12-02 12:50:55,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 271 transitions, 3477 flow [2024-12-02 12:50:56,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 271 transitions, 3352 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-12-02 12:50:56,510 INFO L231 Difference]: Finished difference. Result has 217 places, 171 transitions, 2158 flow [2024-12-02 12:50:56,510 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2158, PETRI_PLACES=217, PETRI_TRANSITIONS=171} [2024-12-02 12:50:56,511 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 155 predicate places. [2024-12-02 12:50:56,511 INFO L471 AbstractCegarLoop]: Abstraction has has 217 places, 171 transitions, 2158 flow [2024-12-02 12:50:56,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 33.111111111111114) internal successors, (298), 9 states have internal predecessors, (298), 0 states have call successors, (0), 0 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 12:50:56,511 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:50:56,511 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 12:50:56,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 12:50:56,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-12-02 12:50:56,712 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:50:56,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:50:56,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1932034917, now seen corresponding path program 6 times [2024-12-02 12:50:56,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:50:56,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620942445] [2024-12-02 12:50:56,712 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:50:56,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:50:56,725 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-12-02 12:50:56,725 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:50:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 12:50:56,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:50:56,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620942445] [2024-12-02 12:50:56,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620942445] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:50:56,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:50:56,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-12-02 12:50:56,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649015504] [2024-12-02 12:50:56,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:50:56,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 12:50:56,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:50:56,983 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 12:50:56,983 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-12-02 12:50:57,299 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-12-02 12:50:57,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 171 transitions, 2158 flow. Second operand has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 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 12:50:57,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:50:57,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-12-02 12:50:57,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:51:04,140 INFO L124 PetriNetUnfolderBase]: 20081/39070 cut-off events. [2024-12-02 12:51:04,140 INFO L125 PetriNetUnfolderBase]: For 168042/168137 co-relation queries the response was YES. [2024-12-02 12:51:04,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139934 conditions, 39070 events. 20081/39070 cut-off events. For 168042/168137 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 325180 event pairs, 15377 based on Foata normal form. 9/39038 useless extension candidates. Maximal degree in co-relation 139752. Up to 25307 conditions per place. [2024-12-02 12:51:04,597 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 219 selfloop transitions, 52 changer transitions 0/286 dead transitions. [2024-12-02 12:51:04,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 286 transitions, 3754 flow [2024-12-02 12:51:04,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 12:51:04,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-12-02 12:51:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 564 transitions. [2024-12-02 12:51:04,599 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6103896103896104 [2024-12-02 12:51:04,599 INFO L175 Difference]: Start difference. First operand has 217 places, 171 transitions, 2158 flow. Second operand 14 states and 564 transitions. [2024-12-02 12:51:04,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 286 transitions, 3754 flow [2024-12-02 12:51:05,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 286 transitions, 3612 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-12-02 12:51:05,127 INFO L231 Difference]: Finished difference. Result has 235 places, 189 transitions, 2596 flow [2024-12-02 12:51:05,128 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2058, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2596, PETRI_PLACES=235, PETRI_TRANSITIONS=189} [2024-12-02 12:51:05,128 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 173 predicate places. [2024-12-02 12:51:05,128 INFO L471 AbstractCegarLoop]: Abstraction has has 235 places, 189 transitions, 2596 flow [2024-12-02 12:51:05,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 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 12:51:05,128 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:51:05,128 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 12:51:05,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-12-02 12:51:05,128 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:51:05,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:51:05,129 INFO L85 PathProgramCache]: Analyzing trace with hash -613856209, now seen corresponding path program 7 times [2024-12-02 12:51:05,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:51:05,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121335038] [2024-12-02 12:51:05,129 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 12:51:05,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:51:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:51:05,634 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 12:51:05,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:51:05,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121335038] [2024-12-02 12:51:05,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121335038] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:51:05,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:51:05,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-12-02 12:51:05,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140616156] [2024-12-02 12:51:05,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:51:05,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 12:51:05,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:51:05,636 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 12:51:05,636 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-12-02 12:51:06,046 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-12-02 12:51:06,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 189 transitions, 2596 flow. Second operand has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 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 12:51:06,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:51:06,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-12-02 12:51:06,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:51:13,052 INFO L124 PetriNetUnfolderBase]: 20103/39252 cut-off events. [2024-12-02 12:51:13,052 INFO L125 PetriNetUnfolderBase]: For 168184/168336 co-relation queries the response was YES. [2024-12-02 12:51:13,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140802 conditions, 39252 events. 20103/39252 cut-off events. For 168184/168336 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 328567 event pairs, 14713 based on Foata normal form. 9/39217 useless extension candidates. Maximal degree in co-relation 140609. Up to 25307 conditions per place. [2024-12-02 12:51:13,496 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 219 selfloop transitions, 71 changer transitions 0/305 dead transitions. [2024-12-02 12:51:13,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 305 transitions, 4285 flow [2024-12-02 12:51:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 12:51:13,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-02 12:51:13,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 516 transitions. [2024-12-02 12:51:13,498 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6013986013986014 [2024-12-02 12:51:13,498 INFO L175 Difference]: Start difference. First operand has 235 places, 189 transitions, 2596 flow. Second operand 13 states and 516 transitions. [2024-12-02 12:51:13,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 305 transitions, 4285 flow [2024-12-02 12:51:14,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 305 transitions, 4161 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-12-02 12:51:14,100 INFO L231 Difference]: Finished difference. Result has 249 places, 199 transitions, 2836 flow [2024-12-02 12:51:14,100 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2472, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2836, PETRI_PLACES=249, PETRI_TRANSITIONS=199} [2024-12-02 12:51:14,101 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 187 predicate places. [2024-12-02 12:51:14,101 INFO L471 AbstractCegarLoop]: Abstraction has has 249 places, 199 transitions, 2836 flow [2024-12-02 12:51:14,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 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 12:51:14,101 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:51:14,101 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 12:51:14,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-12-02 12:51:14,101 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:51:14,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:51:14,102 INFO L85 PathProgramCache]: Analyzing trace with hash 697906569, now seen corresponding path program 8 times [2024-12-02 12:51:14,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:51:14,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513341213] [2024-12-02 12:51:14,102 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:51:14,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:51:14,114 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 12:51:14,114 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:51:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 12:51:14,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:51:14,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513341213] [2024-12-02 12:51:14,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513341213] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:51:14,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:51:14,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-12-02 12:51:14,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247170319] [2024-12-02 12:51:14,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:51:14,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 12:51:14,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:51:14,312 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 12:51:14,312 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-12-02 12:51:14,731 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-12-02 12:51:14,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 199 transitions, 2836 flow. Second operand has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 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 12:51:14,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:51:14,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-12-02 12:51:14,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:51:22,043 INFO L124 PetriNetUnfolderBase]: 20067/38985 cut-off events. [2024-12-02 12:51:22,043 INFO L125 PetriNetUnfolderBase]: For 169921/170074 co-relation queries the response was YES. [2024-12-02 12:51:22,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139604 conditions, 38985 events. 20067/38985 cut-off events. For 169921/170074 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 324928 event pairs, 15070 based on Foata normal form. 9/38945 useless extension candidates. Maximal degree in co-relation 139406. Up to 25124 conditions per place. [2024-12-02 12:51:22,782 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 243 selfloop transitions, 66 changer transitions 0/324 dead transitions. [2024-12-02 12:51:22,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 324 transitions, 4823 flow [2024-12-02 12:51:22,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 12:51:22,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-12-02 12:51:22,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 560 transitions. [2024-12-02 12:51:22,784 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-12-02 12:51:22,784 INFO L175 Difference]: Start difference. First operand has 249 places, 199 transitions, 2836 flow. Second operand 14 states and 560 transitions. [2024-12-02 12:51:22,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 324 transitions, 4823 flow [2024-12-02 12:51:23,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 324 transitions, 4667 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-12-02 12:51:23,427 INFO L231 Difference]: Finished difference. Result has 264 places, 215 transitions, 3291 flow [2024-12-02 12:51:23,428 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2688, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3291, PETRI_PLACES=264, PETRI_TRANSITIONS=215} [2024-12-02 12:51:23,428 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 202 predicate places. [2024-12-02 12:51:23,428 INFO L471 AbstractCegarLoop]: Abstraction has has 264 places, 215 transitions, 3291 flow [2024-12-02 12:51:23,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 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 12:51:23,428 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:51:23,428 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 12:51:23,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-12-02 12:51:23,428 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:51:23,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:51:23,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1009885249, now seen corresponding path program 9 times [2024-12-02 12:51:23,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:51:23,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636232995] [2024-12-02 12:51:23,429 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:51:23,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:51:23,441 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-12-02 12:51:23,441 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:51:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 12:51:23,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:51:23,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636232995] [2024-12-02 12:51:23,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636232995] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:51:23,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:51:23,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-12-02 12:51:23,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921718597] [2024-12-02 12:51:23,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:51:23,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 12:51:23,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:51:23,636 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 12:51:23,636 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-12-02 12:51:24,000 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-12-02 12:51:24,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 215 transitions, 3291 flow. Second operand has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 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 12:51:24,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:51:24,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-12-02 12:51:24,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:51:31,867 INFO L124 PetriNetUnfolderBase]: 20023/38966 cut-off events. [2024-12-02 12:51:31,867 INFO L125 PetriNetUnfolderBase]: For 177451/177604 co-relation queries the response was YES. [2024-12-02 12:51:32,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140525 conditions, 38966 events. 20023/38966 cut-off events. For 177451/177604 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 325191 event pairs, 15043 based on Foata normal form. 9/38934 useless extension candidates. Maximal degree in co-relation 140318. Up to 25124 conditions per place. [2024-12-02 12:51:32,321 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 221 selfloop transitions, 72 changer transitions 0/308 dead transitions. [2024-12-02 12:51:32,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 308 transitions, 4655 flow [2024-12-02 12:51:32,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 12:51:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-12-02 12:51:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 476 transitions. [2024-12-02 12:51:32,322 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.601010101010101 [2024-12-02 12:51:32,322 INFO L175 Difference]: Start difference. First operand has 264 places, 215 transitions, 3291 flow. Second operand 12 states and 476 transitions. [2024-12-02 12:51:32,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 308 transitions, 4655 flow [2024-12-02 12:51:33,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 308 transitions, 4471 flow, removed 85 selfloop flow, removed 3 redundant places. [2024-12-02 12:51:33,021 INFO L231 Difference]: Finished difference. Result has 275 places, 212 transitions, 3225 flow [2024-12-02 12:51:33,021 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3037, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3225, PETRI_PLACES=275, PETRI_TRANSITIONS=212} [2024-12-02 12:51:33,022 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 213 predicate places. [2024-12-02 12:51:33,022 INFO L471 AbstractCegarLoop]: Abstraction has has 275 places, 212 transitions, 3225 flow [2024-12-02 12:51:33,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 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 12:51:33,022 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:51:33,022 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 12:51:33,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-12-02 12:51:33,022 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:51:33,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:51:33,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1704381693, now seen corresponding path program 10 times [2024-12-02 12:51:33,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:51:33,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776323097] [2024-12-02 12:51:33,023 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:51:33,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:51:33,181 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:51:33,181 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:51:33,307 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 12:51:33,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:51:33,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776323097] [2024-12-02 12:51:33,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776323097] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:51:33,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:51:33,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-12-02 12:51:33,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805268597] [2024-12-02 12:51:33,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:51:33,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 12:51:33,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:51:33,309 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 12:51:33,309 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-12-02 12:51:33,599 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-12-02 12:51:33,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 212 transitions, 3225 flow. Second operand has 9 states, 9 states have (on average 33.111111111111114) internal successors, (298), 9 states have internal predecessors, (298), 0 states have call successors, (0), 0 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 12:51:33,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:51:33,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-12-02 12:51:33,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:51:41,413 INFO L124 PetriNetUnfolderBase]: 20203/39377 cut-off events. [2024-12-02 12:51:41,413 INFO L125 PetriNetUnfolderBase]: For 188783/188936 co-relation queries the response was YES. [2024-12-02 12:51:41,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143918 conditions, 39377 events. 20203/39377 cut-off events. For 188783/188936 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 329244 event pairs, 14795 based on Foata normal form. 9/39333 useless extension candidates. Maximal degree in co-relation 143708. Up to 25334 conditions per place. [2024-12-02 12:51:41,842 INFO L140 encePairwiseOnDemand]: 54/66 looper letters, 218 selfloop transitions, 84 changer transitions 0/317 dead transitions. [2024-12-02 12:51:41,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 317 transitions, 5009 flow [2024-12-02 12:51:41,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 12:51:41,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 12:51:41,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 453 transitions. [2024-12-02 12:51:41,844 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6239669421487604 [2024-12-02 12:51:41,844 INFO L175 Difference]: Start difference. First operand has 275 places, 212 transitions, 3225 flow. Second operand 11 states and 453 transitions. [2024-12-02 12:51:41,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 317 transitions, 5009 flow [2024-12-02 12:51:42,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 317 transitions, 4873 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-12-02 12:51:42,605 INFO L231 Difference]: Finished difference. Result has 284 places, 234 transitions, 3836 flow [2024-12-02 12:51:42,605 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3101, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3836, PETRI_PLACES=284, PETRI_TRANSITIONS=234} [2024-12-02 12:51:42,606 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 222 predicate places. [2024-12-02 12:51:42,606 INFO L471 AbstractCegarLoop]: Abstraction has has 284 places, 234 transitions, 3836 flow [2024-12-02 12:51:42,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 33.111111111111114) internal successors, (298), 9 states have internal predecessors, (298), 0 states have call successors, (0), 0 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 12:51:42,606 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:51:42,606 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 12:51:42,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-12-02 12:51:42,607 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:51:42,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:51:42,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1361001985, now seen corresponding path program 11 times [2024-12-02 12:51:42,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:51:42,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830026738] [2024-12-02 12:51:42,608 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:51:42,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:51:42,641 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-12-02 12:51:42,641 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:51:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-12-02 12:51:43,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:51:43,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830026738] [2024-12-02 12:51:43,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830026738] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:51:43,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063370958] [2024-12-02 12:51:43,227 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:51:43,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:51:43,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:51:43,375 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:51:43,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 12:51:43,555 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-12-02 12:51:43,555 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:51:43,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 12:51:43,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:51:43,745 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-12-02 12:51:43,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2024-12-02 12:51:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 12:51:43,767 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:51:43,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063370958] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:51:43,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 12:51:43,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 20 [2024-12-02 12:51:43,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169984743] [2024-12-02 12:51:43,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:51:43,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 12:51:43,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:51:43,768 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 12:51:43,768 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2024-12-02 12:51:44,150 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-12-02 12:51:44,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 234 transitions, 3836 flow. Second operand has 9 states, 9 states have (on average 33.111111111111114) internal successors, (298), 9 states have internal predecessors, (298), 0 states have call successors, (0), 0 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 12:51:44,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:51:44,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-12-02 12:51:44,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:51:52,443 INFO L124 PetriNetUnfolderBase]: 20156/39165 cut-off events. [2024-12-02 12:51:52,443 INFO L125 PetriNetUnfolderBase]: For 197038/197191 co-relation queries the response was YES. [2024-12-02 12:51:52,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143580 conditions, 39165 events. 20156/39165 cut-off events. For 197038/197191 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 326592 event pairs, 15085 based on Foata normal form. 9/39125 useless extension candidates. Maximal degree in co-relation 143365. Up to 25151 conditions per place. [2024-12-02 12:51:53,084 INFO L140 encePairwiseOnDemand]: 54/66 looper letters, 244 selfloop transitions, 75 changer transitions 0/334 dead transitions. [2024-12-02 12:51:53,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 334 transitions, 5623 flow [2024-12-02 12:51:53,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 12:51:53,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 12:51:53,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 460 transitions. [2024-12-02 12:51:53,085 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6336088154269972 [2024-12-02 12:51:53,085 INFO L175 Difference]: Start difference. First operand has 284 places, 234 transitions, 3836 flow. Second operand 11 states and 460 transitions. [2024-12-02 12:51:53,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 334 transitions, 5623 flow [2024-12-02 12:51:53,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 334 transitions, 5446 flow, removed 71 selfloop flow, removed 2 redundant places. [2024-12-02 12:51:53,916 INFO L231 Difference]: Finished difference. Result has 298 places, 247 transitions, 4217 flow [2024-12-02 12:51:53,917 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3673, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4217, PETRI_PLACES=298, PETRI_TRANSITIONS=247} [2024-12-02 12:51:53,917 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 236 predicate places. [2024-12-02 12:51:53,917 INFO L471 AbstractCegarLoop]: Abstraction has has 298 places, 247 transitions, 4217 flow [2024-12-02 12:51:53,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 33.111111111111114) internal successors, (298), 9 states have internal predecessors, (298), 0 states have call successors, (0), 0 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 12:51:53,917 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:51:53,917 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 12:51:53,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 12:51:54,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d92ace5-a818-4868-90f5-d222a0539ec7/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-12-02 12:51:54,118 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:51:54,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:51:54,118 INFO L85 PathProgramCache]: Analyzing trace with hash 694113797, now seen corresponding path program 12 times [2024-12-02 12:51:54,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:51:54,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425459943] [2024-12-02 12:51:54,118 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:51:54,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:51:54,131 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-12-02 12:51:54,131 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:51:54,330 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 12:51:54,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:51:54,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425459943] [2024-12-02 12:51:54,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425459943] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:51:54,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:51:54,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-12-02 12:51:54,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79048932] [2024-12-02 12:51:54,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:51:54,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 12:51:54,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:51:54,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 12:51:54,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-12-02 12:51:54,659 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-12-02 12:51:54,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 247 transitions, 4217 flow. Second operand has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 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 12:51:54,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:51:54,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-12-02 12:51:54,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:52:02,997 INFO L124 PetriNetUnfolderBase]: 20176/39200 cut-off events. [2024-12-02 12:52:02,998 INFO L125 PetriNetUnfolderBase]: For 204792/204944 co-relation queries the response was YES. [2024-12-02 12:52:03,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144773 conditions, 39200 events. 20176/39200 cut-off events. For 204792/204944 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 326802 event pairs, 15122 based on Foata normal form. 8/39140 useless extension candidates. Maximal degree in co-relation 144552. Up to 25124 conditions per place. [2024-12-02 12:52:03,538 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 217 selfloop transitions, 111 changer transitions 0/343 dead transitions. [2024-12-02 12:52:03,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 343 transitions, 5856 flow [2024-12-02 12:52:03,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 12:52:03,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-02 12:52:03,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 508 transitions. [2024-12-02 12:52:03,540 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5920745920745921 [2024-12-02 12:52:03,540 INFO L175 Difference]: Start difference. First operand has 298 places, 247 transitions, 4217 flow. Second operand 13 states and 508 transitions. [2024-12-02 12:52:03,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 343 transitions, 5856 flow [2024-12-02 12:52:04,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 343 transitions, 5663 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-12-02 12:52:04,476 INFO L231 Difference]: Finished difference. Result has 313 places, 264 transitions, 4717 flow [2024-12-02 12:52:04,476 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4035, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4717, PETRI_PLACES=313, PETRI_TRANSITIONS=264} [2024-12-02 12:52:04,476 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 251 predicate places. [2024-12-02 12:52:04,476 INFO L471 AbstractCegarLoop]: Abstraction has has 313 places, 264 transitions, 4717 flow [2024-12-02 12:52:04,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 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 12:52:04,476 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:52:04,476 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 12:52:04,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-12-02 12:52:04,477 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-12-02 12:52:04,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:52:04,477 INFO L85 PathProgramCache]: Analyzing trace with hash -685874789, now seen corresponding path program 13 times [2024-12-02 12:52:04,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:52:04,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486481742] [2024-12-02 12:52:04,477 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 12:52:04,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:52:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:52:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 12:52:04,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:52:04,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486481742] [2024-12-02 12:52:04,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486481742] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:52:04,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:52:04,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-12-02 12:52:04,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571677279] [2024-12-02 12:52:04,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:52:04,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 12:52:04,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:52:04,737 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 12:52:04,737 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-12-02 12:52:05,058 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-12-02 12:52:05,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 264 transitions, 4717 flow. Second operand has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 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 12:52:05,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:52:05,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-12-02 12:52:05,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand